Low-temperature-resistant low-air-permeability silicon resin coating composition and preparation method thereof

A technology of silicone resin and hydroxy silicone oil, which is applied in the direction of coating, etc., can solve the problems of circuit boards, photoelectric devices, vulcanization failure, inability to prevent sulfur vapor penetration, inspection of use requirements, etc., to solve the problem of device failure, improve toughness, and improve The effect of air tightness
CN110452389AActive Publication Date: 2019-11-15山东山科瑞森新材料科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
山东山科瑞森新材料科技有限公司
Publication Date
2019-11-15

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Abstract

The invention discloses a low-temperature-resistant low-air-permeability silicon resin coating composition and a preparation method thereof. The preparation method comprises the following steps: firstly, preparing a trifunctional aryl silicon resin prepolymer, and carrying out copolymerization on the trifunctional aryl silicon resin prepolymer, hydroxyl silicone oil and fluorine-containing hydroxyl silicone oil to prepare hydroxyl-terminated fluorine-containing aryl silicon resin (R1SiO1.5)a(R22SiO)b(R2R3SiO)c(OH)d, wherein the (R1SiO1.5)a(R22SiO)b(R2R3SiO)c(OH)d has a T-shaped aggregate polysiloxane-D type linear polysiloxane block structure; and after the silicon resin is diluted by using a diluent, adding trialkoxysilane as a cross-linking agent and a titanium-containing or tin-containing compound as a catalyst, and performing uniform mixing to obtain the low-temperature-resistant low-air-permeability silicon resin coating composition. The composition coats the surface of a base material in a spraying, brush coating or dip-coating manner, and a low-temperature-resistant low-air-permeability silicon resin coating is obtained after room-temperature curing. The coating provided bythe invention can resist the low temperature of -70 DEG C for a long time and can be subjected to hot and cold circulation for 300 times at the temperature of -70 DEG C to 140 DEG C, and the oxygen permeation amount is smaller than 100 cm<3> / (m<2>*24 h*0.1 MPa).
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Description

technical field

[0001] The invention relates to a low-temperature-resistant and low-breathability silicone resin coating composition and a preparation method thereof, belonging to the technical field of silicone polymers. Background technique

[0002] There is a relatively stable molecular structure Si-O-Si similar to inorganic acid salts in the silicone resin molecule, and the outer layer has a layer of non-polar organic groups, so it has high heat resistance, chemical stability, and electrical insulation and hydrophobicity. Due to the above-mentioned good properties, the high-performance coating prepared with silicone resin as the matrix has become an indispensable protective material in the electronics, aerospace and defense industries.

[0003] With the rapid development of applications in the field of polymer technology, coatings are inevitably exposed to low temperature conditions, and many destructive results in applications occur under low temperature conditions. S...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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