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Silicone sealant used in car lamp assembly and preparation method thereof

A silicone and sealant technology, applied in chemical instruments and methods, adhesives, and other chemical processes, can solve problems such as fogging, achieve good operability, and suppress fogging of car lights

Active Publication Date: 2019-01-15
MIANYANG WELLS ELECTRONICS MATERIAIS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention overcomes the deficiencies of the prior art, and provides a silicone sealant used in car lamp assembly and its single-component silicone sealant, two-component condensation type silicone sealant and two-component addition type silicone sealant. Embodiment of the preparation method of the sealant, in order to solve the problem of fogging caused by the volatilization of the silicone ring body in the assembly of the car lamp

Method used

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  • Silicone sealant used in car lamp assembly and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Embodiment 1 (single component)

[0045] Component A: trimethoxysilane-terminated polydimethylsiloxane with a viscosity of 20,000 mPa.s, 100 g; the mass content of inactive silicone low-molecular rings ΣD3-D10 contained in the refined silicone oil is 0.02%;

[0046] Component B: 0;

[0047] Component C: light calcium carbonate with a specific surface area of ​​25㎡ / g treated with stearic acid, 90g;

[0048] Component D: 0;

[0049] Ingredient E: dibutyltin dilaurate, 0.2g;

[0050] Ingredient F: methyltrimethoxysilane, 5g; the mass content of inactive silicone low-molecular rings ΣD3-D10 contained in it is less than 0.05%;

[0051] Component G: Aminoethylaminopropyltrimethoxysilane, 1g;

[0052] Mix ingredients A and C in a kneader evenly, and ingredient C is dried at high temperature during mixing, then add ingredients E, F, and G, mix evenly in a vacuum high-speed disperser, filter after vacuum defoaming, and pack into plastic silicone tube, is a one-part moisture...

Embodiment 2

[0056] Embodiment 2 (single component)

[0057] Component A: Hydroxyl-terminated polydimethylsilicone oil with a viscosity of 20000mPa.s, 100g; the mass content of inactive silicone low-molecular rings ΣD3~D10 contained in the refined silicone oil is 0.03%

[0058] Component B: 0;

[0059] Component C: light calcium carbonate with a specific surface area of ​​25㎡ / g treated with stearic acid, 90g;

[0060] Component D: carbon black, 1g;

[0061] Component E: bis(isopropoxy) bis(ethyl acetoacetate) titanate, 2g;

[0062] Component F: Methyltrimethoxysilane, 5g;

[0063] Component G: Aminopropyltriethoxysilane and glycidyl etherpropyltrimethoxysilane complex, 1g;

[0064] Dry ingredients A, C, and D through a kneader, disperse them in a three-roller mill, then add them to a vacuum planetary mixer, add ingredients E, F, and G in turn, mix well, vacuum defoam, filter, and pack into plastic silicone tubes Among them, it is a one-component moisture fast curing silicone sealant. ...

Embodiment 3

[0068] Embodiment 3 (two-component condensation type)

[0069] Component A: hydroxyl-terminated polydimethylsilicone oil with a viscosity of 10000mPa.s, 100g; the mass content of inactive silicone low-molecular rings ΣD3-D10 contained in the refined silicone oil is 0.04%;

[0070] Component B: hydroxyl-terminated polydimethylsilicone oil with a viscosity of 1000mPa.s, 15g; the mass content of inactive silicone low-molecular rings ΣD3-D10 contained in the refined silicone oil is 0.03%;

[0071] Component C: light calcium carbonate with a specific surface area of ​​25㎡ / g treated with stearic acid, 90g;

[0072] Component D: carbon black, 1g;

[0073] Ingredient E: dibutyltin dilaurate, 0.1g;

[0074] Component F: ethyl orthosilicate, 2g;

[0075] Component G: Aminoethylaminopropyltrimethoxysilane, 1.5g;

[0076] Mix components A and C uniformly in a kneader, disperse in a three-roller mill, vacuum defoam, seal and package to obtain component A; mix components B, D, E, F, and...

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Abstract

The invention discloses a polyorganosilicone sealant used for vehicle lamp assembly and a preparing method of the polyorganosilicone sealant. Major ingredients of the polyorganosilicone sealant comprise reinforcing filling materials, alkoxy silane or crosslinking agents, condensation or addition curing catalysts, modified silane coupling agent type tackifiers and the like, wherein the reinforcing filling materials are active silicon oil or methylsilicone oil, white carbon black, calcium carbonate and the like; the total mass content of inactive polyorganosilicone low-molecular ring bodies D3-D10 of the reinforcing filling materials is lower than 0.05 percent; the crosslinking agents are hydrogen-containing silicone oil and the like; the total mass content of inactive polyorganosilicone low-molecular ring bodies D3-D10 of the crosslinking agents is lower than 0.05 percent. The polyorganosilicone sealant is used for vehicle lamp assembly, and has the functions of good operability, bonding performance, wet and heat resistance, high-temperature resistance, aging resistance, vibration resistance, waterproof sealing and the like. In addition, the polyorganosilicone sealant has the characteristic that the total mass content of the polyorganosilicone low-molecular ring bodies D3-D10 is lower than 0.05 percent. When the polyorganosilicone sealant is applied to vehicle lamp decoration, the vehicle lamp fogging phenomenon can be inhabited.

Description

technical field [0001] The embodiment of the present invention relates to the field of polymer sealing materials, more specifically, the embodiment of the present invention relates to a silicone sealant used in the assembly of vehicle lamps and its one-component silicone sealant, two-component condensation type silicone A method for preparing a sealant and a two-component addition type silicone sealant. Background technique [0002] Silicone sealant is commonly used as bonding and sealing material for car lamp assembly, which has the advantages of good manufacturability, fast curing, strong adhesion, good sealing, high temperature resistance, and aging resistance. Commonly used silicone sealants for car lights include one-component dealcoholized RTV silicone rubber and two-component condensation RTV silicone rubber, which are cured at room temperature after sizing, and form elastomers after a period of time. Such as glass, aluminum alloy, PC, PP after surface treatment and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J183/06C09J183/07C09J11/04C09K3/10
Inventor 刘良军芦成
Owner MIANYANG WELLS ELECTRONICS MATERIAIS