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Equal-proportion mixed organic silicon sealant for anti-fog vehicle lamp and preparation method thereof

An equal proportion, silicone technology, applied in the direction of adhesives, adhesive additives, polymer adhesive additives, etc., can solve the problems of two-component silicone adhesives that cannot be used, and the ratio fluctuates greatly, so as to improve the mechanical strength And thixotropic, fast curing, low volatile effect

Active Publication Date: 2020-04-17
CHENGDU GUIBAO SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of this invention is to solve the technical difficulty that the existing two-component silicone glue cannot be used in the car lights sprayed with anti-fog paint, and at the same time overcome the large fluctuations in the ratio of the conventional two-component condensation silicone sealant in the equipment However, a kind of equal-proportion mixed silicone sealant for anti-fog lamps and its preparation method are provided

Method used

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  • Equal-proportion mixed organic silicon sealant for anti-fog vehicle lamp and preparation method thereof
  • Equal-proportion mixed organic silicon sealant for anti-fog vehicle lamp and preparation method thereof
  • Equal-proportion mixed organic silicon sealant for anti-fog vehicle lamp and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A component:

[0039] Add 100 parts of 80000mpa.s α, ω-dihydroxypolydimethylsiloxane and 60 parts of nano-active calcium carbonate into the planetary mixer, stir and disperse evenly under vacuum defoaming state, and then discharge for later use.

[0040] B component:

[0041] 100 parts of B-component base material, 5 parts of carbon black (pigment), 20 parts of 100mpa.s dimethylpolydimethylsiloxane, 12 parts of crosslinking agent, γ-aminopropyltrimethoxysilane 2 Parts, 0.05 parts of catalyst dibutyltin diacetate, vacuumize in a high-speed disperser, stir and disperse evenly, and discharge for later use.

[0042] Among them, the crosslinking agent is tetraethyl orthosilicate and dodecyltrimethoxysilane mixed uniformly and heated to 60°C, and under the action of stirring, methanol aqueous solution is added dropwise to undergo hydrolysis and condensation reaction, and then the low molecular weight is removed by distillation under reduced pressure for 2 hours. .

[0043]...

Embodiment 2

[0046] A component:

[0047] Add 100 parts of 20000mpa.s α,ω-dihydroxy polydimethylsiloxane and 80 parts of nano-active calcium carbonate into the planetary mixer, stir and disperse evenly under vacuum defoaming state, and then discharge the materials for later use.

[0048] B component:

[0049] 100 parts of base material of component B, 10 parts of carbon black, 30 parts of dimethylpolydimethylsiloxane of 100mpa.s, 10 parts of crosslinking agent, 3 parts of γ-aminopropyltrimethoxysilane, catalyst 0.05 part of dibutyl tin dilaurate is vacuumized in a high-speed disperser, stirred and dispersed evenly, and then discharged for later use;

[0050] The cross-linking agent is prepared by mixing methyltrimethoxysilane and octyltrimethoxysilane evenly and raising the temperature to 50°C, adding dropwise methanol aqueous solution to undergo hydrolysis and condensation reaction under the action of stirring, and then distilling under reduced pressure for 2 hours to remove the low mole...

Embodiment 3

[0054] A component:

[0055] Add 100 parts of α,ω-dihydroxy polydimethylsiloxane with a viscosity of 20000mpa.s and 100 parts of nano-active calcium carbonate into the planetary mixer, stir and disperse evenly under vacuum defoaming state, and then discharge for later use.

[0056] B component:

[0057] 100 parts of B-component base material, 10 parts of carbon black, 30 parts of methyldimethoxy-terminated polydimethylsiloxane with a viscosity of 20000mpa.s, 3 parts of crosslinking agent, γ-aminopropyl trimethoxy 3 parts of base silane, 0.05 part of catalyst dibutyl tin dilaurate, vacuumize in a high-speed disperser, stir and disperse evenly, and then discharge for standby;

[0058] The cross-linking agent is tetraethyl orthosilicate and octyltrimethoxysilane mixed uniformly and heated to 60°C, and methanol aqueous solution is added dropwise under stirring to undergo hydrolysis and condensation reaction, and then the low molecular weight is removed by distillation under reduc...

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Abstract

The invention discloses an equal-proportion mixed organic silicon sealant for an anti-fog vehicle lamp and a preparation method of the equal-proportion mixed organic silicon sealant. The equal-proportion mixed organic silicon sealant for the anti-fog vehicle lamp comprises a component A and a component B. The component A comprises 100 parts of alpha, omega-dihydroxy polydimethylsiloxane, 20-120 parts of nano activated calcium carbonate, 0-10 parts of white carbon black and 0-30 parts of a plasticizer 1. The component B comprises 100 parts of a component B base material, 0-15 parts of a pigment, 0-30 parts of a plasticizer 2, 3-20 parts of a cross-linking agent, 1-8 parts of a coupling agent and 0.01-2 parts of a catalyst; and the component B base material comprises the following componentsin parts by weight: 100 parts of a plasticizer 3, 80-240 parts of a filler and 0-20 parts of white carbon black. Compared with the traditional two-component silicone sealant, the two-component silicone sealant has the advantages that the component A and the component B are mixed in equal proportion for use, the requirement on the proportioning precision of gluing equipment is low, the curing speed is high, and an anti-fog coating in the anti-fog vehicle lamp is not influenced.

Description

technical field [0001] The invention relates to an equal-proportion mixed silicone sealant for anti-fog vehicle lamps and a preparation method thereof, in particular to a condensation-type equal-proportion mixed silicone sealant which does not affect the anti-fog effect of the anti-fog coating inside the anti-fog vehicle lamp The adhesive belongs to the technical field of silicone sealant for anti-fog lamps. Background technique [0002] As an important tool for car lighting and signal transmission, car lights play a vital role in the safe driving of vehicles. Car lamp glue is an indispensable sealing material in car lamp assembly, mainly bonding PP base and PC lampshade. During the operation of the lights, water ingress and fogging are one of the most important failure modes, especially in rainy days and after car washing. Water and fogging of car lights will not only affect the lighting effect, but also affect driving safety. The reason for the water mist in the car lam...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J183/04C09J11/04C09J11/06C09J11/08C08G77/06C08G77/08
CPCC08G77/06C08G77/08C08K2003/265C08K2201/011C08K2201/014C08L2205/025C08L2205/03C08L2312/00C09J11/04C09J11/06C09J11/08C09J183/04C08L83/04C08K13/06C08K3/26C08K5/544C08K3/04C08K3/36C08K7/26
Inventor 王有治张明陈波赵为黄强
Owner CHENGDU GUIBAO SCI & TECH
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