阅读说明：本技术 一种具有增韧性质的环氧树脂组合物及合成方法 (Epoxy resin composition with toughening property and synthesis method thereof ) 是由 蔡牧霖 黄中汉 黄仁杰 于 2020-07-28 设计创作，主要内容包括：本发明公开了一种具有增韧性质的环氧树脂组合物及合成方法,包括：环氧树脂和改质剂,环氧树脂与改质剂的重量比为100：(0.1～90)；环氧树脂在改质剂的作用下自身合成或修饰改质成具有增韧性质的环氧树脂。本发明利用环氧树脂本身为材料进行改质,可以有效地改善相容性与成本问题,可提升韧性、树脂间的相容性以及耐热性能,降低内应力产生,生产过程无副产物与危险废弃物。(The invention discloses an epoxy resin composition with toughening property and a synthesis method thereof, wherein the epoxy resin composition comprises the following components: the weight ratio of the epoxy resin to the modifier is 100: (0.1 to 90); the epoxy resin is synthesized or modified into the epoxy resin with toughening property under the action of the modifier. The invention uses the epoxy resin as the material to modify, can effectively improve the problems of compatibility and cost, can improve the toughness, the compatibility among resins and the heat resistance, reduces the generation of internal stress, and has no by-products and hazardous wastes in the production process.)

1. An epoxy resin composition having toughening properties, comprising: epoxy resin and modifier;

the weight ratio of the epoxy resin to the modifier is 100: (0.1-90).

2. The epoxy resin composition of claim 1, wherein the weight ratio of the epoxy resin to the modifier is 100: (0.1-5).

3. The epoxy resin composition of claim 2, wherein the weight ratio of the epoxy resin to the modifier is 100: (1-3).

4. The epoxy resin composition according to any one of claims 1 to 3, wherein the epoxy resin is one or a mixture of epoxy resins having a molecular weight of 100 to 10000;

the epoxy resin comprises one or more of bisphenol A epoxy resin, bisphenol F epoxy resin, bisphenol S epoxy resin, novolac epoxy resin, alicyclic glycidyl ether epoxy resin, glycidyl ester epoxy resin and glycidyl amine epoxy resin.

5. The epoxy resin composition according to claim 4, wherein the epoxy resin is one or a mixture of a plurality of epoxy resins having a molecular weight of 100 to 400.

6. The epoxy resin composition as claimed in claim 5, wherein the epoxy resin is selected from the group consisting of an epoxy resin having a molecular weight of 200 and an epoxy resin having a molecular weight of 400;

the weight ratio of the epoxy resin with the molecular weight of 200 to the epoxy resin with the molecular weight of 400 is (10-90): (10-90).

7. The epoxy resin composition according to claim 6, wherein the weight ratio of the epoxy resin having a molecular weight of 200 to the epoxy resin having a molecular weight of 400 is (30 to 60): (30-80).

8. The epoxy resin composition as claimed in any one of claims 1 to 3, wherein the modifier comprises a mixture of one or more of amines, inorganic salts, imidazoles, and ionic promoters.

9. The epoxy resin composition of claim 8, wherein the modifier is an imidazole-based accelerator.

10. A method for synthesizing the epoxy resin composition according to any one of claims 1 to 3, comprising:

weighing the epoxy resin and the modifier according to a preset weight ratio, and uniformly mixing and stirring;

the epoxy resin is synthesized or modified into the epoxy resin with toughening property under the action of the modifier.

Technical Field

The invention relates to the technical field of epoxy resin, in particular to an epoxy resin composition with toughening property and a synthesis method thereof.

Background

The epoxy resin has excellent adhesive force, mechanical property, electrical insulation effect, chemical stability and low shrinkage; due to the wide general characteristics, the epoxy resin can be used in related applications in the fields of buildings, light industry, electrical products, aviation and the like, but the cured epoxy resin has the defects of weak impact resistance and fatigue resistance, and further influences the service life of the epoxy resin. Therefore, the use of toughening materials in epoxy resins is critical to crack resistance, which has been the focus of epoxy resin research.

At present, the toughening method adopted in epoxy resin is to add materials such as active end group rubber, polyether, polyester or monofunctional epoxy diluent and the like into the epoxy resin, and to participate in the crosslinking reaction of the epoxy resin through functional groups such as hydroxyl, carboxyl, isocyanate and the like, thereby achieving the purpose of toughening. Although the above toughening method is effective for preventing cracking, the heat resistance of the cured product is remarkably lowered, and the electrical insulation properties are also indirectly affected.

The existing common toughened epoxy resin and the epoxy resin modified by rubber materials have the compatibility problem due to the low polarity of the rubber structure; other modes of synthesizing or modifying by utilizing polyurethanes or other raw materials have higher cost for protecting the synthesis process and the environment.

Therefore, the epoxy resin is used as a material for modification, so that the problems of compatibility and cost can be effectively improved.

Disclosure of Invention

Aiming at the technical problems in the prior art, the invention provides an epoxy resin composition with toughening property and a synthesis method thereof.

The invention discloses an epoxy resin composition with toughening property, which comprises the following components: epoxy resin and modifier;

the weight ratio of the epoxy resin to the modifier is 100: (0.1-90).

As a further improvement of the present invention, the weight ratio of the epoxy resin to the modifier is 100: (0.1-5).

As a further improvement of the present invention, the weight ratio of the epoxy resin to the modifier is 100: (1-3).

As a further improvement of the invention, the epoxy resin is one or a mixture of a plurality of epoxy resins with the molecular weight of 100-10000;

the epoxy resin comprises one or more of bisphenol A epoxy resin, bisphenol F epoxy resin, bisphenol S epoxy resin, novolac epoxy resin, alicyclic glycidyl ether epoxy resin, glycidyl ester epoxy resin and glycidyl amine epoxy resin.

As a further improvement of the invention, the epoxy resin is one or a mixture of a plurality of epoxy resins with the molecular weight of 100-400.

As a further improvement of the invention, the epoxy resin is selected from the epoxy resin with the molecular weight of 200 and the epoxy resin with the molecular weight of 400;

the weight ratio of the epoxy resin with the molecular weight of 200 to the epoxy resin with the molecular weight of 400 is (10-90): (10-90).

As a further improvement of the invention, the weight ratio of the epoxy resin with the molecular weight of 200 to the epoxy resin with the molecular weight of 400 is (30-60): (30-80).

As a further improvement of the invention, the modifier comprises one or a mixture of more of amines, inorganic salts, imidazoles and ion promoters.

As a further improvement of the invention, the modifier is an imidazole promoter.

The invention also discloses a synthetic method of the epoxy resin composition, which comprises the following steps:

weighing the epoxy resin and the modifier according to a preset weight ratio, and uniformly mixing and stirring;

the epoxy resin is synthesized or modified into the epoxy resin with toughening property under the action of the modifier.

Compared with the prior art, the invention has the beneficial effects that:

the invention uses the epoxy resin as the material to modify, can effectively improve the problems of compatibility and cost, can improve the toughness, the compatibility among resins and the heat resistance, reduces the generation of internal stress, and has no by-products and hazardous wastes in the production process.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

The invention is described in further detail below:

the present invention provides an epoxy resin composition having toughening properties, comprising: the epoxy resin is synthesized or modified into the epoxy resin with toughening property under the action of the modifier; the toughening agent is used for toughening a high polymer material, reduces internal stress, has no resin compatibility problem, and has good heat resistance. Wherein the content of the first and second substances,

the weight ratio of the epoxy resin to the modifier is 100: (0.1 to 90); if the modifier is too much, the gelling phenomenon is easy to generate in the modifying process, and the polymerization degree of the too much modifier is reduced, so that the toughening effect is poor; if the modifier is too little, the reactivity is too slow, and the production time is longer; for this reason, the weight ratio of the epoxy resin of the present invention to the modifier is preferably 100: (0.1 to 10), more preferably 100: (0.1 to 5), more preferably 100: (1-3).

The molecular weight of the epoxy resin is 100-10000, and the epoxy resin comprises one or a mixture of more of bisphenol A epoxy resin, bisphenol F epoxy resin, bisphenol S epoxy resin, novolac epoxy resin, alicyclic glycidyl ether epoxy resin, glycidyl ester epoxy resin and glycidyl amine epoxy resin. Preferably, the epoxy resin with the molecular weight of below 1000 and the molecular weight of 8000 is selected; more preferably an epoxy resin having a molecular weight of 400 or less. Because the epoxy resin with the molecular weight of 200 and 400 has lower viscosity, higher heat resistance, poorer toughness, the epoxy resin with the molecular weight of 8000 has high viscosity, medium heat resistance and higher toughness, the three compositions can obtain the most proper viscosity, heat resistance and toughness.

As a best embodiment, the epoxy resin of the invention selects the epoxy resin with the molecular weight of 200 and the epoxy resin with the molecular weight of 400, and the weight ratio of the epoxy resin with the molecular weight of 200 to the epoxy resin with the molecular weight of 400 is (10-90): (10-90), preferably (10-80): (10-80), more preferably (30-60): (30-80). The epoxy resin contained in the epoxy resin component (A) may be a monofunctional epoxy resin or a polyfunctional epoxy resin or a polyphenolic ring structured epoxy resin, or a mixture of the above three epoxy resins.

The modifier comprises one or more of amines, inorganic salts, imidazoles and ion promoters, and preferably is imidazole or a mixture with other promoters.

The invention also provides a synthetic method of the epoxy resin composition, which comprises the following steps: weighing the epoxy resin and the modifier according to a preset weight ratio, and uniformly mixing and stirring; the epoxy resin is synthesized or modified into the epoxy resin with toughening property under the action of the modifier.