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Methyl tetrahydrophthalic anhydride or tetrahydrophthalic anhydride polymerization method and application of formed polymer

A technology of methyl tetrahydrophthalic anhydride and tetrahydrophthalic anhydride, applied in the direction of organic chemistry, can solve the problems of short lifespan of active species, intramolecular rearrangement, low molecular weight of polymers, etc., and achieve tensile strength and bending strength improvement, comprehensive The effect of good effect and price advantage

Pending Publication Date: 2021-03-30
ZHEJIANG ALPHARM CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Free radical initiators and cationic polymerization initiators are widely used in the polymerization of olefins. However, in the polymerization of cyclic olefins, due to the short life of the active species, easy deactivation, intramolecular rearrangement during the polymerization process, and the formation of polymers The molecular weight is very low and other reasons have not been used

Method used

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  • Methyl tetrahydrophthalic anhydride or tetrahydrophthalic anhydride polymerization method and application of formed polymer
  • Methyl tetrahydrophthalic anhydride or tetrahydrophthalic anhydride polymerization method and application of formed polymer
  • Methyl tetrahydrophthalic anhydride or tetrahydrophthalic anhydride polymerization method and application of formed polymer

Examples

Experimental program
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Effect test

Embodiment 1

[0032] Put 300g of 4-methyltetrahydrophthalic anhydride into a 500ml four-necked flask with a thermometer condenser, heat the oil bath to 100°C, add 2g of initiator benzoyl peroxide, keep it warm for 2 hours, control the temperature not to exceed 150°C, and react After cooling to about 100°C, pour the polymer into a stainless steel container to collect and cool.

[0033] After mixing 100 parts of YD-128 epoxy resin, 70 parts of AMT-120, 30 parts of polymer, and 0.12 parts of N,N-dimethylbenzylamine (BDMA), cure it at 140°C for 10 hours, and measure its tensile strength 79.81Mpa, bending strength 119.34MPa. The TG point is 105.8°C.

Embodiment 2

[0035] Put 300g of 4-methyltetrahydrophthalic anhydride into a 500ml four-neck flask with a thermometer condenser, heat the oil bath to 100°C, add the initiator glycine ferrous complex [(NH 2 CH 2 COO) 2 Fe], 1g of aqueous solution, keep warm for 3 hours, control the temperature not to exceed 170°C, cool to about 100°C after the reaction, pour the polymer into a stainless steel container to collect and cool.

[0036] After mixing 100 parts of YD-128 epoxy resin, 70 parts of AMT-120, 30 parts of polymer, and 0.12 parts of N,N-dimethylbenzylamine (BDMA), it was cured at 140°C for 10 hours, and its bending strength was measured to be 123.43 MPa, tensile strength 81.29MPa. TG point 105.2°C.

Embodiment 3

[0038] Put 300g of 4-methyltetrahydrophthalic anhydride into a 500ml four-neck flask with a thermometer condenser, heat the oil bath to 100°C, add the initiator 30%AlCl 3 4g aqueous solution, keep warm for 4 hours, control the temperature not to exceed 170°C, cool to about 100°C after the reaction, pour the polymer into a stainless steel container to collect and cool.

[0039] After mixing 100 parts of YD-128 epoxy resin, 70 parts of AMT-120, 30 parts of polymer, and 0.12 parts of N,N-dimethylbenzylamine (BDMA), it was cured at 140°C for 10 hours, and its bending strength was measured to be 154.65 MPa, tensile strength 77.86MPa. The TG point is 104.3°C.

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Abstract

The invention provides a methyl tetrahydrophthalic anhydride or tetrahydrophthalic anhydride polymerization method and application of a formed polymer. The polymerization method comprises the following steps: adding methyl tetrahydrophthalic anhydride or tetrahydrophthalic anhydride into a four-neck flask provided with a thermometer, a condenser pipe and a dropping funnel, adding an initiator, carrying out heating to a reaction temperature, carrying out a heat-preserved reaction, and conducting cooling to obtain a polymer product, wherein the methyl tetrahydrophthalic anhydride comprises 3-methyl tetrahydrophthalic anhydride and 4-methyl tetrahydrophthalic anhydride and isomers thereof, and tetrahydrophthalic anhydride is an isomer of 3-methyl tetrahydrophthalic anhydride and 4-methyl tetrahydrophthalic anhydride or a mixture of 3-methyl tetrahydrophthalic anhydride and 4-methyl tetrahydrophthalic anhydride. When the polymer is used in the invention, the polymer can be independently used, and can also be mixed with methyl tetrahydrophthalic anhydride for use; compared with the mode that only methyl tetrahydrophthalic anhydride is used, a TG point is greatly reduced when the polymeris independently used; and when the polymer is mixed with methyl tetrahydrophthalic anhydride for use, the TG point is reduced a little, tensile strength and bending strength are obviously improved,and comprehensive effect is good. Compared with a common long-carbon-chain flexible curing agent, a curing agent composed of the methyl tetrahydrophthalic anhydride or tetrahydrophthalic anhydride polymer has the advantage of being low in price.

Description

technical field [0001] The invention belongs to the field of curing agents, in particular to a method for the polymerization of methyl tetrahydrophthalic anhydride or tetrahydrophthalic anhydride. Background technique [0002] Epoxy resin is a kind of thermosetting resin with good comprehensive performance. It has good adhesion performance, low curing temperature, good blending performance, stable chemical performance, low price, etc. It is widely used in the fields of coatings, adhesives, composite materials, etc. The disadvantages of high stress, poor crack resistance, hard and brittle texture, impact resistance, poor heat and humidity resistance, and low peel strength limit the application of epoxy resin to a large extent. [0003] The solution to the brittleness of epoxy resin is toughening. There are mainly three methods of toughening: 1. Change the structure of epoxy resin and increase the flexible chain segment, for which a variety of epoxy resins have been develope...

Claims

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Application Information

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IPC IPC(8): C07D307/89C08G59/42
CPCC07D307/89C08G59/4215
Inventor 沈纪达张骏彭亮
Owner ZHEJIANG ALPHARM CHEM TECH
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