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Single-component dealcholization-type silicon sealant used for automobile lamp and preparation method thereof

A silicone sealant, dealcoholized technology, applied in chemical instruments and methods, adhesives, other chemical processes, etc., can solve the problem of polluting car lights, etc., achieve no oil leakage, fast curing speed, and enhanced bonding performance Effect

Active Publication Date: 2011-12-14
CHENGDU GUIBAO SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a kind of one-component dealcoholization type silicone sealant and preparation method thereof for the deficiencies in the prior art, and it is characterized in that this silicone sealant is to the car lamp material polypropylene (PP) Good adhesion to polycarbonate (PC), good tolerance to car lights in complex environments, overcoming the problem of ordinary silicone glue polluting car lights, to meet the growing market needs

Method used

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  • Single-component dealcholization-type silicon sealant used for automobile lamp and preparation method thereof
  • Single-component dealcholization-type silicon sealant used for automobile lamp and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Take α, ω-dihydroxy polydimethylsiloxane at 25°C, the viscosity at 25°C is 15000mPa·s, take 100 parts, 150 parts of pre-dried calcium carbonate, 20 parts of carbon black, methyl 5 parts of silicone oil, 20 parts of vinyl trimethoxysilane, 4 parts of fumed silica, 0.1 part of n-butyl titanate, 0.2 parts of aminopropyl triethoxysilane and 0.3 parts of glycidoxypropyl trimethoxysilane part of the mixture as a tackifier. Stir and mix for 40 minutes at a vacuum of 0.06Mpa, remove low-molecular substances at a vacuum of 0.08Mpa, and then discharge and fill.

Embodiment 2

[0023] Take 90 parts of α, ω-dihydroxy polydimethylsiloxane, whose viscosity is 80000mPa·s at a temperature of 25°C, 120 parts of pre-dried calcium carbonate; 10 parts of carbon black, 20 parts of dimethyl silicone oil 10 parts of methyltrimethoxysilane, 2 parts of fumed silica, 0.1 part of n-butyl titanate, 0.2 part of aminopropyltriethoxysilane and 0.3 part of aminoethylaminopropyltrimethoxysilane Make a tackifier. Stir and mix for 30 minutes at a vacuum of 0.1Mpa, remove low-molecular substances at a vacuum of 0.1Mpa, and then discharge and fill.

Embodiment 3

[0025] Take 100 parts of α, ω-dihydroxypolydimethylsiloxane, whose viscosity is 45000mPa·s at a temperature of 25°C, 140 parts of pre-dried calcium carbonate, 15 parts of carbon black, and 12 parts of methyl silicone oil , 15 parts of ethyl silicate, 3 parts of fumed silica, 0.05 part of ethyl acetoacetate isopropyl titanate chelate, 0.05 part of n-butyl titanate, 0.3 part of n-butylaminopropyl trimethoxysilane and A mixture of 0.2 parts of aminoethylaminopropyltrimethoxysilane is used as a tackifier. Stir and mix for 35 minutes at a vacuum of 0.08Mpa, remove low-molecular substances at a vacuum of 0.09Mpa, and then discharge and fill.

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Abstract

The invention discloses a single-component dealcholization-type silicon sealant used for an automobile lamp and a preparation method thereof. The single-component dealcholization-type silicon sealant used for the automobile lamp is characterized by being prepared through the following steps: stirring and mixing 90-110 parts of alpha, omega-dihydric dimethyl siloxane of which the viscosity is 15000-80000mPa.s, 120-150 parts of pre-dried stearic acid processed nanometer activated calcium carbonate, 10-20 parts of carbon black, 5-20 parts of dimethylsilicone fluid, 5-30 parts of cross linking agent, 2-5 parts of fumed silica, 0.01-10 parts of catalyst and 0.1-1 part of tackifier for 30-40 minutes under the vacuum degree of 0.06-0.1MPa; when the vacuum degree is 0.08-0.1MPa, removing low-molecule substances; and then discharging and filling. The silicon sealant has reduced volatile matters of the silicon sealant, the automobile lamp does not form fog in the practical application, the single-component dealcholization-type silicon sealant has good weather resistance and environment ageing performance, and greasy dirt can be prevented from being oozed; the adhering performance of polypropylene (PP) and polycarbonate (PC) materials is enhanced by the sealant; and the single-component dealcholization-type silicon sealant has high curing speed and is favorable for industrial production.

Description

technical field [0001] The invention relates to a one-component dealcoholized silicone sealant for automobile lamps and a preparation method thereof, belonging to the field of polymer materials. Background technique [0002] The sealants for automotive lamps currently on the market mainly include polyurethane sealants, butyl hot melt adhesives and silicone sealants. The application of polyurethane sealants on car lights has the characteristics of high strength and low volatile content, but polyurethane sealants have poor adhesion and poor resistance to complex environments, and water leakage will occur in car lights if they are exposed to the environment for a long time; The base hot melt adhesive has the advantages of high density and low water vapor transmission rate, but it needs to be heated and inconvenient to operate, and its weather resistance and adhesion are not good, which limits its application in automobile lights. Silicone sealants have excellent properties suc...

Claims

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Application Information

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IPC IPC(8): C09J183/06C09J11/04C09K3/10
Inventor 任小军温旭东袁素兰王有治李步春
Owner CHENGDU GUIBAO SCI & TECH
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