Polycarboxylic acid resin and epoxy resin composition

A polybasic carboxylic acid and epoxy resin technology, applied in the direction of electrical components, circuits, electrical solid devices, etc., can solve the problems of cured product characteristic deviation, difficult to withstand long-term lighting, peeling, etc., to achieve improved operability, excellent transparency, Excellent light fastness effect

Inactive Publication Date: 2017-05-10
NIPPON KAYAKU CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, when the above-mentioned alicyclic acid anhydrides are used as curing agents, these curing agents have a high vapor pressure and part of them evaporate during curing. Therefore, when used as a curing agent for epoxy resins and thermally cured in an open system, the anhydride itself will evaporate into the atmosphere
As a result, the following problems will arise: environmental pollution due to the release of harmful substances into the atmosphere, adverse effects on the human body, pollution of the production line, and epoxy Poor curing of the resin composition, etc.
The deviation of the curing conditions caused by the volatilization of the curing agent will lead to the deviation of the characteristics of the cured product, making it difficult to obtain a cured product with the target performance stably
[0007] In addition, the problem of volatilization is obvious when sealing LEDs, especially SMDs (Surface Mount Devices) with a resin composition for encapsulating optical semiconductors using conventional acid anhydrides as curing agents. Depression, in severe cases, metal wires will be exposed
In addition, there are problems such as cracking and peeling during reflow soldering, and it is difficult to withstand long-term lighting
[0008] On the other hand, polyvalent carboxylic acid has little volatilization during curing and can be used as a curing agent for epoxy resin as described above, but unlike acid anhydrides, intermolecular hydrogen bonding is strong and crystallization or curing occurs in many cases, Very high viscosity even in liquid form
Also, poor compatibility in other resins, so it is practical to avoid its use

Method used

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  • Polycarboxylic acid resin and epoxy resin composition
  • Polycarboxylic acid resin and epoxy resin composition
  • Polycarboxylic acid resin and epoxy resin composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0194] Into a flask equipped with a stirring device, a condenser, and a thermometer, 58.8 parts of methanol-modified polysiloxane X22-160AS (manufactured by Shin-Etsu Chemical Co., Ltd.) at both ends, tricyclodecane dimethanol (manufactured by TCD Alcohol DM OXEA) ) and 33.9 parts of 2,4-diethylglutaric anhydride (YH-1120 manufactured by Mitsubishi Chemical Corporation), were reacted at 100°C for 8 hours, at 120°C for 4 hours, and at 140°C for 1 hour to obtain 99 parts of polyhydric carboxylic acid resin (A-1) of this invention. The acid value of the obtained compound was 123 mgKOH / g, the viscosity was 988 mPa·s, and the appearance was a colorless transparent liquid.

Embodiment 2

[0196]Into a flask equipped with a stirring device, a condenser, and a thermometer, 58.8 parts of methanol-modified polysiloxane X22-160AS (manufactured by Shin-Etsu Chemical Co., Ltd.) at both ends, 2,4-diethyl-1,5- 6.4 parts of pentanediol (Kyowajiol PD-9 manufactured by Kyowa Hakka Chemical Co., Ltd.), 34.8 parts of 2,4-diethylglutaric anhydride (YH-1120 manufactured by Mitsubishi Chemical Co., Ltd.), reacted at 100°C for 10 hours, and reacted at 120°C It reacted for 2 hours, and obtained 99 parts of polyhydric carboxylic acid resin (A-2) of this invention. The acid value of the obtained compound was 120 mgKOH / g, the viscosity was 532 mPa·s, and the appearance was a colorless transparent liquid.

Embodiment 3

[0198] Into a flask equipped with a stirring device, a condenser, and a thermometer, 58.8 parts of methanol-modified polysiloxane X22-160AS (manufactured by Shin-Etsu Chemical Co., Ltd.) at both ends, ditrimethylolpropane (Di-TMP Hiroei 5.4 parts of Perstorp Co., Ltd., 35.9 parts of 2,4-diethylglutaric anhydride (YH-1120, manufactured by Mitsubishi Chemical Corporation), reacted at 100° C. for 8 hours, and reacted at 120° C. for 10 hours. It was made to react at 140 degreeC for 2 hours, and 99 parts of polyvalent carboxylic acid resin (A-3) of this invention were obtained. The acid value of the obtained compound was 118 mgKOH / g, the viscosity was 1229 mPa·s, and the appearance was a colorless transparent liquid.

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Abstract

A polycarboxylic acid resin (A) is obtained by using an acid anhydride (a) represented in formula (1) and a polyhydric alcohol compound (b) having at least two hydroxyl groups in the molecule and carrying out an addition reaction of the alcoholic hydroxyl group and the acid anhydride group of each component. (R represents, where each is independent, hydrogen atoms, and an alkyl group or a cycloalkyl group having 1 to 6 carbon atoms.)

Description

technical field [0001] The present invention relates to a polyvalent carboxylic acid resin suitable for use in electrical and electronic materials, particularly optical components represented by optical semiconductors, and an epoxy resin composition containing the polyvalent carboxylic acid resin. Background technique [0002] Polycarboxylic acids have high thermal stability, good electrical properties, optical properties, chemical resistance, etc., as well as the formation of condensates, good reactivity, etc. as crosslinking agents, condensation agents, etc., in recent years, as a polymer Manufacturing raw materials are extremely attractive and widely available. In addition, it is known that polyvalent carboxylic acids can also be used as curing agents for epoxy resins. [0003] Curable resin compositions containing epoxy resins are used in fields such as construction, civil engineering, automobiles, and airplanes as resins having excellent heat resistance. In recent yea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/12C08G59/42H01L23/29H01L23/31H01L33/56
CPCC08G59/42C08G59/423C08G63/12C08G63/6956C08L67/02H01L23/293H01L33/56H01L2924/0002
Inventor 洼木健一宫川直房谷口直佑佐佐木智江设乐律子
Owner NIPPON KAYAKU CO LTD
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