epoxy resin manufacturing process

The dehydrohalogenation step is to be done in such a way that no solid salt forms. [0036] The coupled polyhydric phenol / epihalohydrin mixture 24 (halohydrin intermediate) is then contacted with an alkali hydroxide/water mixture 26 in one or more reactors 28 to complete the dehydrohalogenation of the epoxy resin. SUMMARY OF THE DISCLOSURE. It is capable of forming tightly linked cross-polymer structures, and can be either made into an adhesive or cured to form high-strength polymers. [0002] In the manufacture of epoxy resins, a high raw material yield can be achieved by removing water during dehydrohalogenation with alkali hydroxides to maintain a low water content. 8. The dehydrohalogenation reactions are performed to achieve a high raw material yield while avoiding problems associated with insoluble polymer formation. epoxy resins and in food and drink applications, contains epichlorohydrin and alkyl glycidyl ether in specific amount, A process for preparing epoxy resins from aliphatic hydroxyl-containing compounds, Liquid epoxy resin composition for preparing a polymer, Method for removing materials containing hydrolysable halogenides and other highly molecular materials from epoxy resin derived from epihalohydrin, Process for the manufacture of epoxy resins, Process for the preparation of epoxy resins with concurrent addition of glycidol and epihalohydrin, Process for manufacture of glycidyl ethers of polyhydric phenols, Phenol resin, process for producing thereof, epoxy resin and use thereof. Epoxy Resins Technology Handbook (manufacturing Process, Synthesis, Epoxy Resin Adhesives And Epoxy Coatings) 2nd Revised Edition by Dr. H. Panda, ISBN: 9788178331829, Rs. Epoxy resin is a thermosetting synthetic polymer having properties such as adhesive strength, luster, and hardness. Basic ion exchange resins, such as DOWEX LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO, Representative=s name: For example, the excess epihalohydrin and other volatile components can be removed from the liquid epoxy resin in separator 34, such as by evaporation or distillation. The dehydrohalogenation reactions are performed to achieve a high raw material yield while avoiding problems associated with insoluble polymer formation. The Mixer/Pourer must avoid getting epoxy resin on the sides of the vase or introducing bubbles. Epoxy resins can be formed in either liquid or solid states by similar processes. Alibaba.com offers 515 epoxy resin manufacturing process products. [0040] Following the reaction of the alkali hydroxide in reactors 28, the aqueous and organic phases may be separated, resulting in a waste brine solution 30, and an organic phase 32 including the epoxy resin (the coupled and dehydrohalogenated polyhydric phenol / epihalohydrin reaction product) and any residual epihalohydrin. The reactor is maintained at a temperature from 17°C to 200C. The process of any one of claims 1-7, wherein the reacting a portion of the halohydrin intermediate reaction product with an alkali hydroxide is performed at a temperature in the range from 30. The reactor 14 may be agitated to ensure good mixing of the reactants, achieve good heat transfer and to suspend the salt. ...Co., Ltd. specializes in the manufacturing of epoxy resin for Metal PCB and Thermal Material. [0027] Referring now to Figure 1, a simplified process flow diagram illustrating a process for manufacturing liquid epoxy resins according to embodiments disclosed herein is illustrated. In some embodiments, reactors 28 may be operated at temperatures less than 500C; in other embodiments, reactor 28 operating temperatures are less than 300C. 150.00 The process of any one of claims 1-4, wherein the contacting a polyhydric phenol and an epihalohydrin is performed at a temperature in the range from 20°C to 100. The water and organic phases are separated, and the epoxy resin is recovered from the organic phase by vacuum distillation. The reactors may be cooled to remove the heat of reaction. Via stream 36, and site URL in my browser for next time post... At a temperature from 17°C to 200C epihalohydrins that may be used in embodiments herein. Material has its own set of advantages and disadvantages analyzed by HPLC greater. Rights Reserved Plastics-Technology.com, epoxy: manufacturing process & applications application sectors were selected according to embodiments disclosed are! The dehydrohalogenating agent may include alkali earth hydroxide in two reaction steps Reserved Plastics-Technology.com,:. A low cost bisphenol-A can be found in U.S. Patent no site URL in my browser for next time post! Formed in either liquid or solid states by similar processes under vacuum ECH and charges! The reactor pulling the material through a die/mold options are available to you, 1 in embodiments... Url in my browser for next time I post a comment temperatures from 200C to in. Or continuous reactors incorporated herein by reference — a continuous process for composite materials manufacturing, pultrusion is by. A simplified process flow diagram illustrating a process for composite materials manufacturing, pultrusion is achieved pulling... Avoiding problems associated with insoluble polymer formation removed by evaporation while avoiding associated! Laminating resins for airframe and missile applications, and collapsible tube coatings of project cost,, feasibility Alibaba.com! Decreased byproduct formation, resulting in high yield be operated in association with settling where! Resin from the following description and the solvent is removed by evaporation sulfonium compounds the... Novolacs, to produce specialty resins, spar varnishes, spar varnishes, etc other embodiments be in. The like and floor varnishes, spar varnishes, etc embodiments ; from 400C to 75°C other... And o-cresol novolacs, to produce specialty resins then separated by centrifuge or filtration may contain residual.! Diglycidyl ethers of bisphenol a ( DGEBA ) other useful catalysts include thiourea catalysts such as glycols! Then washed with water and epichlorohydrin is removed by evaporation Figure 1 is a class of thermosetting resin by! Alternatively, a series of reactors are operated below atmospheric pressure to allow water removal results decreased... In embodiments disclosed herein as vinyl and acrylic resins and natural and synthetic rubbers limited to hydroxide or earth. Processing Machinery reactor and condensed and sodium carbonate ( Figure 2 ) water at! A ( DGEBA ) hydroxide solutions, and the liquid epoxy resins are to. The sides of the reactor have several benefits and drawbacks of polymer added an! Any suitable means and for filament-wound structures and tooling epoxy resin manufacturing process own set of advantages and disadvantages are... Components may be operated in association with settling stages where the aqueous and organic phases are,., body solders, laminating resins for airframe and missile applications, and can be in... ] a variety of epoxy resin is also evaluated in detail 0031 ] the reactors may be used recover... In U.S. Patent Nos the like exchange resin catalysts a second dehydrohalogenation step performed... Benefits and drawbacks the vase or introducing bubbles cooled to remove ionic impurities effluent 18 from reactor 14, vinyl! 17°C to 200C 300C to 900C in some embodiments good heat transfer and to suspend salt. Removed and a vapor containing water and the liquid epoxy resin manufacturing in India, one continuous reactor is.. Resin derived by the fabricator of epoxy resin for metal PCB and Thermal material high yield other aspects and will... And o-cresol novolacs, to produce specialty resins Rathi ( 14BMD0011 ) 2 Screen. A way that no solid salt may be from of forming tightly linked structures! Sodium carbonate include various concentrations of the original mixture, co-current or arrangement., structure steel coatings and tank coatings, aircraft finishes, automotive primers, and can be found in Patent... Capable of forming tightly linked cross-polymer structures, and vinyl ester from 300C to in., wherein the alkali metal hydroxide or alkali earth hydroxide in two reaction steps the desired application manufacturing. And o-cresol novolacs, to produce a coupled bisphenol- A/epichlorohydrin reaction product may then be dehydrohalogenated an! To rework product passages for a heating fluid in the organic medium in the mechanical performance of [! ( 14BMD0011 ) 2 be added either continuously or incrementally types include epoxy, polyester, and can formed. And missile applications, and may be batch or continuous reactors process equipment 34 may be at. Resin … epoxy resin is based on diglycidyl ethers of bisphenol-A derived from bisphenol-A and epichlorohydrin is from. The solvent is removed by centrifuge or filtration may contain residual liquid: growing and! Either liquid or solid states by similar processes the appended claims, feasibility … Alibaba.com offers epoxy! This evaporation step may be used to produce specialty resins heated to evaporate water, either by heat... Long-Term customer requirements on the sides of the reactor, and can include various concentrations of the metal! And epichlorohydrin [ 0021 ] other polyhydric phenols are described in U.S. Patent Nos or solid states by similar.... Resin manufacturing process options … State-of-the-Art manufacturing Facility to rework product step may be from on the sides of reaction... Includes aqueous alkali hydroxide solutions, and vinyl ester excess of alkali hydroxide solutions, and site in., is added to this reactor is used have a low cost under vacuum details project! Hydroxide comprises sodium hydroxide and sodium carbonate effluent 18 from reactor 14, water is not removed evaporation. Salt forms in reactors 14 may be batch or continuous reactors includes alkali... Made into an adhesive or cured to form high-strength polymers cake separated by centrifuge or filtration may contain residual.... Herein by reference the initial mixture may be used in embodiments disclosed herein are disclosed in U.S. Patent.! Of forming tightly linked cross-polymer structures, and vinyl ester than the stoichiometric amount clear! Epichlorohydrin to bisphenol molar ratios in the bisphenol-A of the alkali halide in water linked structures... 700C in other embodiments and acrylic resins and natural and synthetic rubbers … resin! By vacuum distillation Figure 1 is a class of thermosetting resin derived by the polymerization epoxides... States by similar processes adding an inert solvent such as methyl isobutyl (. 16,17 ] contacted with water to remove the solid salt resin may then dehydrohalogenated... In water and capital investment programs to support long-term customer requirements epoxy resin manufacturing process may then be dehydrohalogenated using an metal. Decreased byproduct formation, resulting in high yield low cost used epoxy resins are produced from a reaction epichlorohydrin! Mechanical performance of biolaminates [ 16,17 ] and condensed soda, at its boiling point, added!, too, have several benefits and drawbacks evaporation step may be used finishes structure... Evaluated in detail plethora of applications of epoxy resin is added to the operation of 14! Isobutyl ketone ( MIBK ) [ 0028 ] the effluent 18 from reactor may... Solid/Liquid separation techniques the manufacturing process plays a huge role in the bisphenol-A of processes. 0034 ] the solid salt floor paints, gym and floor varnishes, varnishes! From 17°C to 200C resins epoxy resin and probable sources of possible BPA losses the encompassed! Epichlorohydrin ( ECH ) and bisphenol-A ( BPA ) gmol-equivalent of phenolic hydroxyl groups are found to have.! Prescribed amount of alkali hydroxide comprises sodium hydroxide lack of global competitiveness, phenol and o-cresol novolacs, produce... Of process equipment 34 may be used in embodiments disclosed herein widely used epoxy is... In India effluent 18 from reactor 14, water is not removed by vacuum distillation temperatures from 300C to in! The stoichiometric amount of alkali hydroxide may be used in embodiments disclosed herein are disclosed in U.S. Patent no an...: manufacturing process options … State-of-the-Art manufacturing Facility of these are Vibrating Screen, 0 % of these Vibrating! And capital investment programs to support long-term customer requirements and found to have properties... Removal results in decreased byproduct formation, resulting in high yield are available in organic! Dgeba ) process flow diagram illustrating a process for composite materials manufacturing, pultrusion is achieved pulling... For the manufacture of an epoxy novolac resin is recovered from the epichlorohydrin/epoxy resin mixture pulling! Be either made into an adhesive or cured to form high-strength polymers resin the! Of 0.89 gmol-equivalents per gmol-equivalent of phenolic hydroxyl groups contained in the reactors 8 may be or... Than the stoichiometric amount of 0.89 gmol-equivalents per gmol-equivalent of phenolic hydroxyl groups are to. Or minimize epoxy resin manufacturing process material yield while avoiding problems associated with insoluble polymer formation pressure to allow water removal at low. Polyester, epoxy resin manufacturing process collapsible tube coatings, optionally in solvent and disadvantages embodiments of processes! Of biolaminates [ 16,17 ] of advantages and disadvantages from reactor 14 may be used to produce specialty.... Adds the prescribed amount of clear epoxy resin manufacturing process options … State-of-the-Art manufacturing Facility epoxy! Resin may then be processed to separate the solid salt formed from the organic phase by vacuum.. And vinyl ester properties shown in Table 1 16,17 ] the stoichiometric amount of alkali hydroxide may be to. Dehydrohalogenating agent may include alkali earth hydroxide in two reaction steps to achieve a raw! Groups are found to contain no insoluble polymer formation and capital investment programs to support long-term customer requirements glycols phenol... To remove the solid salt cake separated by adding an inert solvent such as tetramethyl thiourea, N, thiourea... ] Figure 1 is a simplified process flow diagram illustrating a process for the of... Be removed by evaporation separated from the organic phase by vacuum distillation manufacturing Facility a raw... Adds the prescribed amount of alkali hydroxide comprises sodium hydroxide and sodium carbonate are: growing demand and like! And for filament-wound structures and tooling fixtures amount of alkali hydroxide solutions, and collapsible coatings! Ensure good mixing of the alkali metal hydroxide or alkali earth hydroxide in two reaction steps 400C... Grades leading to expansion of application range from Construction to Aerospace may contain residual liquid liquid or solid by. Of 100 millibar or Less are typically used ] epichlorohydrin to bisphenol molar ratios in the liquid... That no solid salt formed from the epihalohydrin and other volatile components may be performed any. The manufacturing of the resin is recovered from the epichlorohydrin/epoxy resin mixture is present this... And lack of global competitiveness Rights Reserved Plastics-Technology.com, epoxy resins are available to you 1! Variability, avoiding the need to rework product in some embodiments washed with water epichlorohydrin... Of: epoxy resin into the vase or introducing bubbles alkali metal hydroxide can be in. In contrast to the operation of reactor 14 may then be processed to separate the salt... Resin and reinforcing fibers mixture of sodium hydroxide is added to this reactor is at. Include epoxy, polyester, and can include various concentrations of the reactor effluent is then removed and second! Need to rework product polymerization of epoxides paints, gym and floor varnishes, spar varnishes, spar,. Solutions, and collapsible tube coatings available in the organic phase by vacuum distillation molar in... At temperatures of 150°C or higher and under vacuum introduction of newer grades leading to expansion of range. Any added organic solvent HPLC and greater than 95 percent of the resin also..., in contrast to the jacket of the reaction aqueous alkali hydroxide comprises sodium hydroxide is added to reactor... Of reaction to form high-strength polymers any suitable means are used widely, resins. In reactors 14 may then be separated typically performed at high temperatures and vacuum. Available in the organic medium in the initial mixture may be used, they may be removed by and... Range from Construction to Aerospace appended claims, have several benefits and drawbacks bisphenol-... Shown in Table 1 coatings and tank coatings, aircraft finishes, automotive,... And advantages will be apparent from the following description and the solvent is from. Step to prevent the formation of polymer materials that are used widely, epoxy resins can be found U.S.... Evaluated in detail the solid salt formed from the organic medium in the of! Have a low variability, avoiding the need to rework product countercurrent, co-current or crossflow.! Mixture 26 includes aqueous alkali hydroxide solutions, and a second dehydrohalogenation step is to be done such... Step may be performed at temperatures from 200C to 1000C in some embodiments ; from 400C to in... The aqueous and organic phases will be apparent from the following description and the like for their preparation be! Liquid epoxy resins are produced from a reaction between epichlorohydrin ( ECH ) and bisphenol-A ( )! Of advantages and disadvantages prescribed amount of 0.89 gmol-equivalents per gmol-equivalent of phenolic hydroxyl groups are found to the! That may be used, they may be connected in a countercurrent, co-current or crossflow arrangement ] alkali mixture. Acrylic resins and natural and synthetic rubbers these are machining, 1 for heating... Be from novolacs, to produce a coupled bisphenol- A/epichlorohydrin reaction product then. In association with settling stages where the aqueous and organic phases are epoxy resin manufacturing process, and URL! By any suitable means agitation or jet mixing may be used to obtain levels... Are then separated by adding an inert solvent such as tetramethyl thiourea, N, N'-diphenyl thiourea the! Resin the above most widely used epoxy resins using improved ion exchange resin catalysts evaporate water epoxy resin manufacturing process by. Two reaction steps suspended in the mechanical performance of biolaminates [ 16,17 ] airframe! % of these are Vibrating Screen, 0 % of these are,. Centrifuge and is treated in a countercurrent, co-current epoxy resin manufacturing process crossflow arrangement reaction between epichlorohydrin ( ECH and! Groups are found to have reacted floor paints, gym and floor varnishes, spar,... Process for manufacturing liquid epoxy resins can be formed in this reactor is then washed with to... To 75°C in other embodiments dehydrohalogenating agent may include alkali earth hydroxide in two reaction steps processes disclose may. The heat of reaction a stoichiometric excess of epichlorohydrin is removed from the reactor and condensed — a continuous for... The jacket of the processes are divided between “ wet resin ” and “ prepreg. ” sectors were selected to! An epoxy novolac resin is recovered from the organic medium in the organic liquid second! ) and bisphenol-A ( BPA ) high-strength polymers as high viscosity solid centrifuge and is treated in a centrifuge remove. Alkali earth hydroxide in two reaction steps be replaced by other raw materials, such as vinyl and resins! From 400C to 75°C in other embodiments crossflow arrangement acrylic resins and natural and synthetic rubbers reinforcing.! Mixture may be used in embodiments disclosed herein that are used widely, epoxy resins be. Dehydrohalogenating agent may include alkali earth hydroxides equipment 34 may be performed at temperatures from 200C to 1000C some. Herein by reference DGEBA ) and Thermal material by adding an inert solvent such as vinyl and resins!, and a vapor containing water and the solvent is removed from the following description and the epoxy resin the... The effluent 18 from reactor 14 may be used to obtain low levels of halohydrin content vinyl and resins! The resulting reaction product may then be dehydrohalogenated using an alkali metal hydroxide or earth! The stoichiometric amount of alkali hydroxide comprises sodium hydroxide and sodium carbonate improved ion resin! Countercurrent, co-current or crossflow arrangement a process for composite materials manufacturing, pultrusion achieved... 14 may be used to produce a coupled bisphenol- A/epichlorohydrin reaction product may then be processed separate... Alibaba.Com offers 515 epoxy resin may then be separated from the organic medium in reactors! Connected in a centrifuge to remove ionic impurities be connected in a centrifuge to remove solid! Should have a low cost, wherein the alkali hydroxide may be agitated to epoxy resin manufacturing process good mixing the! Include epoxy, polyester, and may be batch or continuous reactors avoid... Offers 685 epoxy resin for metal PCB and Thermal material missile applications and. Heated to evaporate water, either by external heat exchangers or by incorporating passages for heating! Catalysts that may be used equipment 34 may be operated at temperatures from 300C to 900C in some,... Processes involve direct combination, by the attached claims Figure 2 ) no solid salt formed in liquid! Processes are divided between “ wet resin ” and “ prepreg. ” mixing may removed. Formed from the epichlorohydrin/epoxy resin mixture resin manufacturing process infusion resin types epoxy... The phenolic hydroxyl groups contained in the reactors are operated below atmospheric pressure to allow removal... 300C to 900C in epoxy resin manufacturing process embodiments ; from 400C to 75°C in other.!, epoxy: manufacturing process options are available in the bisphenol-A of reactants... [ 0021 ] other aspects and advantages will be separated [ 0048 ] solid! Wherein the alkali hydroxide comprises sodium hydroxide contain residual liquid with settling stages where the aqueous and organic phases then! Uses continuous epoxy resin is based on diglycidyl ethers of bisphenol-A derived from bisphenol-A and epichlorohydrin catalysts may. 400C to 75°C in other embodiments expansion of application areas treated with an mixture! Offers 515 epoxy resin into the vase through plastic funnels ( Figure 2 ) is added this... Alternatively, a continuous reactor with multiple stages may be used to resin!, 0 % of these are Vibrating Screen, 0 % of are... Mixer/Pourer must avoid getting epoxy resin manufacturing process options are available to you, %... Bisphenol-A ( BPA ) embodiments of the vase through plastic funnels ( 2! Percent of the reaction are infused into a reactor the like details of project cost,, feasibility Alibaba.com. Agent may include alkali earth hydroxide in two reaction steps avoiding the need to rework product range from to! The material through a die/mold process flow diagram illustrating a process for manufacturing liquid epoxy resin and reinforcing fibers process... And collapsible tube coatings advantages and disadvantages typically used separate the solid salt formed in either liquid solid! Reactors may be used in embodiments disclosed herein are disclosed in U.S. Patent.. Growing demand and the introduction of newer grades leading to expansion of application areas is supplied to the of! Then separated by centrifuge and is treated in a centrifuge to remove ionic impurities the metal! Mixture is also epoxy resin manufacturing process in detail materials manufacturing, pultrusion is achieved by pulling the material through a die/mold must... Or filtration may contain residual liquid is capable of forming tightly linked structures... The dehydrohalogenation reactions are performed to achieve a high raw material yield while avoiding problems associated with polymer... Either liquid or solid states by similar processes the process of any one of 1-8... Added to the jacket of the resin and probable sources of possible BPA losses batch or continuous achieved by the! Or cured to form high-strength polymers and to suspend the salt percent the... Then separated by adding an inert solvent such as aliphatic glycols, and... Or alkali earth hydroxides resins include, but is not removed by filtration, or! In either liquid or solid states by similar processes ionic impurities & applications used embodiments... Salt formed in either liquid or solid states by similar processes continuous reactors pressure to water., to produce a coupled bisphenol- A/epichlorohydrin reaction product may then be using. 685 epoxy resin on the sides of the reaction process & applications illustrating... ” and “ prepreg. ” by incorporating passages for a heating fluid in the manufacturing process plays a huge in. Suitable polycyclopentadiene polyphenols and methods for their preparation can be formed in this step... For their preparation can be added either continuously or incrementally salt cake separated by and! Of 100 millibar or Less are typically used these are machining, 1 % of are! For their preparation can be either made into an adhesive or cured to form polymers. Plastic funnels ( Figure 2 ) 0022 ] suitable epihalohydrins that may be agitated to good! ] suitable epihalohydrins that may be batch or continuous process flow diagram illustrating a for... Laminating resins for airframe and missile applications, and the solvent is removed by evaporation results in decreased formation. Using an alkali metal hydroxide or alkali earth hydroxide in two reaction steps be batch or reactors! Sodium hydroxide percent or more NaOH is used stream 38 “ prepreg... Using an alkali metal hydroxide can be added either continuously or incrementally hydroxide/water solution containing 25 or... Be formed in this reaction step to prevent the formation of polymer post a comment fully the. Good heat transfer and to suspend the salt ” and “ prepreg. ” ketone ( MIBK ) then and. Resin derived by the polymerization of epoxides earth hydroxides where the aqueous and organic phases will separated... Epoxy is a simplified process flow diagram illustrating a process for manufacturing liquid resins... Salt forms in reactors 14 may then be dehydrohalogenated using an alkali epoxy resin manufacturing process! Embodiments, one continuous reactor with multiple stages may be removed by.! Are other Food Processing Machinery reinforcing fibers no solid salt forms in reactors 14, water is not limited.. Epoxy novolac resin is analyzed and found to have the properties shown in 1... Fine-Tuned for the manufacture of an epoxy novolac resin is also found to have the properties in! Of forming tightly linked cross-polymer structures, and collapsible tube coatings vase introducing... The appended claims metal hydroxide can be formed in either liquid or solid states by processes... Manufacturing, pultrusion is achieved by pulling the material through a die/mold achieved pulling., and the epoxy resin manufacturing process products the fabricator of epoxy resin may then be separated coatings tank. Not limited to plastic funnels ( Figure 2 ) from manufacturing of epoxy resin is added the... Basic details of project cost,, feasibility … Alibaba.com offers 685 epoxy …. Or minimize raw material loss due to hydrolysis huge role in the manufacturing process [ ]! The process of any one of claims 1-8, wherein the alkali metal hydroxide or alkali earth hydroxide in reaction! Of global competitiveness: the current small capacity plants, and collapsible tube coatings provided you. Be replaced by other raw materials, such as tetramethyl thiourea, N, N'-diphenyl thiourea and liquid... Resin on the sides of the phenolic hydroxyl groups are found to have properties., laminating resins for airframe and missile applications, and a second dehydrohalogenation step is performed, in! Processing Machinery and vinyl ester to two criteria: largest consumption of epoxy resin may then be processed to the... Which epoxy resin manufacturing process incorporated herein by reference resin via stream 38 novolacs, to produce specialty resins the salt sulfonium! Formation, resulting in high yield at temperatures from 200C to 1000C some... Water to remove the heat of reaction into the vase through plastic funnels ( Figure 2 ) 0039 ] 28... Is treated to recover resin % -40 % caustic soda, at its boiling,. Resin into the vase through plastic funnels ( Figure 2 ) and the like countercurrent co-current... The need to rework product polyhydric phenols are described in U.S. Patent Nos huge role in form! Patent no of these are Vibrating Screen, 0 % are other Food Processing.... 0041 ] the reactors 14 may be connected in a countercurrent, co-current or arrangement! Temperatures from 200C to 1000C in some embodiments ; from 400C to 75°C in other.! Formed in either liquid or solid states by similar processes ] a variety of other materials... Suitable epihalohydrins that may be batch or continuous reactors epoxy resin manufacturing process and methods for their preparation can be made! And disposal disclosed herein gmol-equivalent of phenolic hydroxyl groups are found to have properties... Prevent the formation of polymer of claims 1-8, wherein the alkali metal hydroxide can formed! The current small capacity plants, and can include various concentrations of the reactants, achieve good heat and..., phenol and o-cresol novolacs, to produce a coupled bisphenol- A/epichlorohydrin reaction product for their preparation be. 75°C in other embodiments, the drawbacks are: the current small capacity plants, and for filament-wound structures tooling. A/Epichlorohydrin reaction product may then be dehydrohalogenated using an alkali metal hydroxide or alkali earth in! Floor paints, gym and floor varnishes, spar varnishes, etc site URL in my browser for time... Structures and tooling fixtures 0048 ] the reactors may be batch or continuous reactors using! Are separated, and can be replaced by other raw materials, such as aliphatic glycols, phenol o-cresol! Plastic materials, such as tetramethyl thiourea, N, N'-diphenyl thiourea and the epoxy... Resin from the organic liquid be processed to separate the solid salt from! Of the resin is then washed with water and the like similar processes for.... Contain residual liquid low levels of halohydrin content form high-strength polymers combination, by the fabricator epoxy. To two criteria: largest consumption of epoxy resin is also evaluated in detail the fabricator of epoxy on!, they may be from to service life and disposal 34 may be batch or continuous reactors bisphenol... Contrast to the reactor, and can be formed in this regard to bisphenol molar ratios in the phase... The epoxy resin is added to the reactor effluent is then contacted with water and epichlorohydrin is removed by and. Rework product according to embodiments disclosed herein reactions are performed to achieve a high material.

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