Method for synthesizing liquid rubber-epoxy resin polymer

A liquid rubber and epoxy resin technology, applied in the field of rubber toughening modified epoxy resin synthesis, can solve the problems of complex system, many reaction components, and difficult reaction control, and achieve excellent mechanical properties, good transparency and viscosity. Moderate effect

Inactive Publication Date: 2007-06-13
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The modified epoxy resin prepared by graft copolymerization has excellent performance and good storage stability, but due to the large number of reaction components, the proportioning process is not easy to adjust, the system is complicated, and the reaction is not easy to control on the ideal chain link

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Add 1800 grams of hydroxyl-terminated polybutadiene-acrylonitrile liquid rubber to a 3-liter three-necked bottle, heat to 100±5°C, vacuumize for 30 minutes, then cool down to 50°C, add 511 grams of toluene diisocyanate, and heat up to 80 ℃, constant temperature reaction for 4.5 hours, and then evacuated for 30 minutes to obtain an NCO% of 11.78 in the isocyanate-terminated nitrile butadiene liquid rubber prepolymer, then cool down and discharge; add 1800 grams of hydroxyl-terminated polybutadiene to a 3-liter three-necked bottle Liquid rubber, heated to 100±5°C, vacuumed for 30 minutes, then cooled to 50°C, added 553 grams of toluene diisocyanate, heated to 80°C, reacted at constant temperature for 4.5 hours, and then vacuumed for 30 minutes to obtain isocyanate-terminated polybutadiene The NCO% in the liquid rubber prepolymer is 10.09, and the material is cooled and discharged. In a 3-liter three-necked bottle, add 2240 grams of epoxy resin E-44, then add 560 grams of ...

Embodiment 2

[0034] Add 1800 grams of hydroxyl-terminated polybutadiene-acrylonitrile liquid rubber into a 3-liter three-necked bottle, heat to 100±5°C, vacuumize for 30 minutes, then cool down to 50°C, add 158 grams of toluene diisocyanate, and heat up to 80 ℃, constant temperature reaction for 4.5 hours, and then evacuated for 30 minutes to obtain an NCO% of 2.93 in the isocyanate-terminated nitrile liquid rubber prepolymer, then cool down and discharge; add 1800 grams of hydroxyl-terminated polybutadiene to a 3-liter three-necked bottle Liquid rubber, heated to 100±5°C, vacuumed for 30 minutes, then cooled to 50°C, added 173 grams of toluene diisocyanate, heated to 90°C, reacted at constant temperature for 4.5 hours, and then vacuumed for 30 minutes to obtain isocyanate-terminated polybutadiene The NCO% in the liquid rubber prepolymer is 2.33, and the material is cooled and discharged; the material is discharged after cooling. In a 3-liter three-necked bottle, add 1400 grams of epoxy re...

Embodiment 3

[0036] Add 1800 grams of hydroxyl-terminated polybutadiene-acrylonitrile liquid rubber into a 3-liter three-necked flask, heat to 100±5°C, vacuumize for 30 minutes, then cool down to 50°C, add toluene diisocyanate 678, and heat up to 80°C , constant temperature reaction for 4.5h, then evacuated for 30min, the NCO% in the obtained isocyanate-terminated nitrile liquid rubber prepolymer was 15.08, and the material was cooled and discharged; 1800 grams of hydroxyl-terminated polybutadiene liquid was added to a three-necked bottle of 3 liters Rubber, heated to 100±5°C, evacuated for 30 minutes, then cooled to 50°C, added 732 grams of toluene diisocyanate, heated to 90°C, reacted at constant temperature for 4.5 hours, then evacuated for 30 minutes to obtain isocyanate-terminated polybutadiene liquid The NCO% in the rubber prepolymer is 12.88, and the material is cooled and discharged; the material is discharged after cooling. In a 3-liter three-necked bottle, add 1400 grams of epoxy...

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Abstract

Using the fluid rubber of acrylonitrile-polybutadiene end-capped with hydroxy and the multi-isocyanate to react and then the prepolmer of acrylonitrile fluid rubber end-capped with isocyanate was obtained; using the fluid rubber of polybutadiene end-capped with hydroxy and the multi-isocyanate to react and then the prepolymer of polybutadiene fluid rubber end-capped with isocyanate was obtained. According to the ratio of 10-40/90-60, the above two prepolymers were mixed, and then the mixed prepolymer was obtained. The optimum multi-isocyanate are TDL and MDI. The fluid bisphenol epoxy resin with the style A and the flexible epoxy resin were matched pair again according the ratio of 80-50/20-50. The built-epoxy resin then obtained. followed by the reaction between the isocyanate in the mixed prepolymer and the hydroxyl in the built-epoxy resin, so as to lead the fluid rubber in the built-epoxy resin by the form of chemical bonding. Finally, the polymer of fluid rubber- epoxy resin was obtained.

Description

technical field [0001] The invention relates to a method for synthesizing toughened and modified epoxy resin with rubber. In particular, the mixture of hydroxyl-terminated polybutadiene-acrylonitrile liquid rubber prepolymer and hydroxyl-terminated polybutadiene liquid rubber prepolymer is chemically modified to toughen the composite epoxy resin to prepare a Synthesis of high performance liquid rubber-epoxy polymers. Background technique [0002] High-performance liquid rubber-epoxy polymer is a modified epoxy resin with an interpenetrating network structure. There are many methods for modifying epoxy resin at home and abroad, among which rubber toughening modified epoxy resin is the most widely used and has excellent performance. [0003] The rubber used to toughen the modified epoxy resin must meet two basic conditions: one is suitable molecular weight. The rubber used should be compatible with the epoxy resin before curing and well dispersed, which requires that the mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G81/02C08G59/14C08F136/06C08F236/12C08F8/30
Inventor 于晶胡少坤张凤英齐永新
Owner BC P INC CHINA NAT PETROLEUM CORP
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