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Preparation method of polyester-modified silica gel

A technology of polyester modification and silica gel, applied in the field of silica gel, can solve the problems of poor hardness stability and mechanical properties, poor adhesion and mechanical properties, etc., achieve good compatibility and broaden the application range

Active Publication Date: 2012-05-02
浙江震东新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, adding polymers containing alkoxy chain segments to polyester resins by physical blending can improve the flexibility of the paint film, but it has a negative impact on the hardness stability and mechanical properties of the resin, and it is difficult to meet high requirements. The requirements for high-quality resin will inevitably affect its application field; Chinese patent CN102031697A reports the preparation method of polyester / polyether modified silicone oil ternary copolymerization fabric finishing agent. Electrostatic properties, stain resistance, but because its molecular chain does not contain cross-linkable reactive groups, it is difficult to establish a durable bond between polyesters, and its adhesion and mechanical properties are poor

Method used

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  • Preparation method of polyester-modified silica gel
  • Preparation method of polyester-modified silica gel
  • Preparation method of polyester-modified silica gel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) Preparation of carboxylated polyester-polyether block copolymer:

[0039] Put terephthalic acid (PTA), ethylene glycol (EG) monomer and polyethylene glycol 600 (PEG 600) into the reactor at a molar ratio of 2.1:1:1, and then add 0.1% of the total monomer mass The p-toluenesulfonic acid is slowly heated to 110°C, and the solid terephthalic acid (PTA) is dissolved in the polyethylene glycol liquid. then in N 2 Under reduced pressure and vacuum under protection, the reactants were continuously and vigorously stirred with an electric stirrer, and water was gradually distilled out. After 6 hours of constant temperature reaction, when no more water was distilled out, the esterification reaction was completed, and the carboxylated polyester- Polyether block copolymers.

[0040] (2) Preparation of monoamino modified silicone block copolymer:

[0041] Put octamethylcyclotetrasiloxane and tetramethyldisiloxane into the reactor at a mass ratio of 4:1, react at a temperature...

Embodiment 2

[0045] (1) Preparation of carboxylated polyester-polyether block copolymer:

[0046]Put terephthalic acid (PTA), ethylene glycol (EG) monomer and polyethylene glycol 800 (PEG 800) into the reactor at a molar ratio of 2.1:1:1, and then add 0.1% of the total monomer mass The p-toluenesulfonic acid is slowly heated to 120°C, and the solid terephthalic acid (PTA) is dissolved in the polyethylene glycol liquid. Then under the protection of N2, the reaction is decompressed and vacuumized, and the reactants are continuously stirred vigorously with an electric stirrer, and water is gradually distilled out. After 4 hours of constant temperature reaction, when no more water is distilled out, the esterification reaction is completed, and the carboxylation reaction is obtained. Polyester-polyether block copolymers.

[0047] (2) Preparation of monoamino modified silicone block copolymer:

[0048] Put octamethylcyclotetrasiloxane and tetramethyldisiloxane into the reactor at a mass ratio ...

Embodiment 3

[0052] (1) Preparation of carboxylated polyester-polyether block copolymer:

[0053] Put terephthalic acid (PTA), ethylene glycol (EG) monomer and polyethylene glycol 400 (PEG 400) into the reactor at a molar ratio of 2.1:1:1, and then add 2% of the total monomer mass The p-toluenesulfonic acid is slowly heated to 115 °C, and the solid terephthalic acid (PTA) is dissolved in the polyethylene glycol liquid. Then under the protection of N2, the reaction is decompressed and vacuumized, and the reactant is continuously and vigorously stirred with an electric stirrer, and water is gradually distilled out. After 5 hours of constant temperature reaction, when no more water is distilled out, the esterification reaction is completed, and the carboxylation reaction is obtained. Polyester-polyether block copolymers.

[0054] (2) Preparation of monoamino modified silicone block copolymer:

[0055] Put octamethylcyclotetrasiloxane and tetramethyldisiloxane into the reactor at a mass rati...

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Abstract

The invention provides a preparation method of novel polyester-modified silica gel. The invention is characterized in that the novel polyester-modified silica gel is a block copolymer of a polyester chain segment, a polyether chain segment and an organic silicon chain segment; by the introduction of the polyester chain segment, the silica gel maintains excellent weather resistance, electric insulativity, cohesiveness, heat resistance, stain resistance, gloss retention and color retention and also has good wear resistance, solvent resistance, mechanical strength and faster curing time, and theadhesive force of organic silica gel on a base material is improved; by the introduction of a crosslinking agent containing amino groups and active groups, the modified silica gel not only has excellent gloss retention, cohesiveness, electric insulativity and heat resistance, but also has the advantages of high surface hardness, bending resistance and the like, and has fast curing speed, wear resistance and no powdering. In the block copolymer, the structure is controllable, and the performance and the application range of the polyester-modified silica gel are greatly expanded.

Description

technical field [0001] The invention relates to the technical field of silica gel, in particular to a method for preparing silica gel modified with polyester. Background technique [0002] Silica gel has excellent high temperature and low temperature resistance, weather resistance, water repellency, electrical insulation and other properties and a very wide operating temperature range. Indispensable and important materials in fields such as and human daily life. [0003] However, silica gel itself also has a series of problems, such as poor solvent resistance, poor mechanical strength, extreme wear resistance, high curing temperature, especially when the film is coated on a polyester substrate, its adhesion is poor, which greatly limits Application range of silica gel. Polyester resin has good physical and mechanical properties, processability, flexibility and chemical corrosion resistance, so polyester-modified silica gel can overcome its lack of performance and improve t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G81/00C08G63/672C08G77/388
Inventor 傅越江钟少锋吴幼泉王黎明吴仁妹黄小军
Owner 浙江震东新材料有限公司
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