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A kind of polyester polyol epoxy resin toughening agent

A technology of alcohol epoxy resin and toughening agent, which is applied in the field of polyester polyol toughening agent, can solve the problems of thermal deformation temperature and high temperature performance decline of cured products, achieve good toughening effect, overcome flexibility and thermal deformation The effect of temperature

Active Publication Date: 2016-07-06
建滔覆铜板(深圳)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the epoxy resin tougheners that are widely used in industry mainly include: polyether polyols, carboxyl-terminated rubbers, long-chain aliphatic amines and other compounds whose main chain is a flexible chain. The toughening effect of these tougheners is not bad, but generally There is a disadvantage that when the amount of toughening agent is large, the heat distortion temperature and high temperature performance of the cured product will drop more

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] (1) The preparation raw material of polyester polyol epoxy resin toughening agent comprises the composition of following equivalent ratio in the present embodiment:

[0013] Trimellitic acid is 1 carboxyl equivalent; 1,5-pentanediol is 2.0 hydroxyl equivalent.

[0014] (2) The preparation method of polyester polyol epoxy resin toughening agent is as follows:

[0015] Put 104 grams (2 hydroxyl equivalents) of 1,5-pentanediol into the reaction bottle, add 70 grams (1 carboxyl equivalent) of trimellitic acid under stirring, slowly fractionate and dehydrate the temperature, and control the outlet temperature of the fractionating column at 100~106°C Between; with the continuous removal of moisture, the temperature of the material gradually increased, and when the temperature of the material reached 230 ° C, it began to keep warm, and kept at 230 ~ 235 ° C until anhydrous distilled off, then slowly decompressed to 3 ~ 4kPa, and kept until there was no water. until distilled;...

Embodiment 2

[0018] (1) The preparation raw material of polyester polyol epoxy resin toughening agent comprises the composition of following equivalent ratio in the present embodiment:

[0019] Pyromellitic dianhydride is 1 carboxyl equivalent; diethylene glycol is 2.0 hydroxyl equivalent.

[0020] (2) The preparation method of polyester polyol epoxy resin toughening agent is as follows:

[0021] Put 106 grams (2 hydroxyl equivalents) of diethylene glycol into the reaction bottle, add 54.5 grams (1 carboxyl equivalent) of pyromellitic dianhydride under stirring, slowly fractionate and dehydrate the temperature, and control the outlet temperature of the fractionating column between 100 and 106 °C ; With the continuous removal of moisture, the temperature of the material gradually rises. When the temperature of the material reaches 230°C, it starts to keep warm, and keeps it at 230~235°C until no water distills out, then slowly reduces the pressure to 3~4kPa, and keeps it until there is no d...

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Abstract

The invention discloses a polyester polyol epoxy resin toughening agent. The raw materials for preparing the epoxy resin toughening agent include aromatic polycarboxylic acid or / and acid anhydride and glycol, wherein the equivalent ratio of each component is: aromatic polycarboxylic acid or / and acid anhydride 1.0 carboxyl equivalent, glycol 1.2~2.0 hydroxyl equivalent. Compared with the prior art, the polyester polyol toughening agent of the present invention not only contains a flexible chain structure in the molecular chain, but also contains an aromatic ring with a rigid structure, so when applied to epoxy resin toughening, it not only toughens The effect is good, and at the same time, the shortcoming that the flexibility, thermal deformation temperature and high temperature performance of the cured product cannot be taken into account in the prior art is overcome.

Description

technical field [0001] The invention relates to an epoxy resin toughening agent, in particular to a polyester polyol toughening agent prepared by condensation of aromatic polycarboxylic acid or / and acid anhydride and dihydric alcohol. Background technique [0002] Due to its moderate price and wide application range, epoxy resin is widely used in various fields such as electronics and electrical engineering, building materials, machinery manufacturing, and military industry. However, the brittleness of the epoxy cured product is too high, so it is generally necessary to undergo necessary toughening and modification treatment in order to obtain a satisfactory application effect. At present, the epoxy resin tougheners that are widely used in industry mainly include: polyether polyols, carboxyl-terminated rubbers, long-chain aliphatic amines and other compounds whose main chain is a flexible chain. The toughening effect of these tougheners is not bad, but generally There is a ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/127C08G63/668C08L63/00C08L67/00
Inventor 饶保林余传柏徐旭
Owner 建滔覆铜板(深圳)有限公司