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Low-moisture-permeability single-component dealcoholization type room-temperature silicon sulfide rubber sealing agent and preparation method thereof

A room temperature vulcanization and dealcoholization technology, applied in adhesives, adhesive additives, non-polymer adhesive additives, etc., can solve problems such as poor high temperature and high humidity resistance, low moisture permeability, and low water vapor transmission rate , to achieve the effect of low moisture permeability, good high temperature and high humidity resistance, and good moisture permeability

Active Publication Date: 2015-04-15
富乐(苏州)新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a novel one-component dealcoholized room temperature vulcanized silicone rubber sealant and its preparation for the problems of low water vapor transmission rate and poor high temperature and high humidity resistance of the dealcoholized room temperature vulcanized silicone rubber sealant method, the sealant has a low moisture permeability, which can effectively block the penetration of moisture and protect the sealing parts from damage by water vapor. In addition, the sealant also has excellent high-temperature and high-humidity resistance. It still has good sealing performance after aging to ensure the normal work of sealing parts in extreme environments

Method used

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  • Low-moisture-permeability single-component dealcoholization type room-temperature silicon sulfide rubber sealing agent and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0029] Select α, ω-divinyl polydimethylsiloxane with a viscosity of 10000mpa s, dimethyl silicone oil with a viscosity of 100mpa s, silane-modified polyisobutylene with a molecular weight of 10000, vinyl silicon chloroplatinic acid The oxane chelate is a platinum catalyst, and the specific component ratio is as follows:

[0030] A. 100 parts of α, ω-divinyl polydimethylsiloxane;

[0031] B. 6 parts of hydrotrimethoxysilane;

[0032] C. 1.5 parts of platinum catalysts;

[0033] D. 8 parts of simethicone oil;

[0034] E. 20 parts of silane-modified polyisobutylene;

[0035] F. 5 parts of vinyltrimethoxysilane;

[0036] G. 1.5 parts of aminopropyltriethoxysilane;

[0037] H. 80 parts of calcium carbonate, 10 parts of fumed white carbon black;

[0038] 1. 2 parts of tetraisopropyl titanate.

[0039] N 2 Add A, B, and C into the reaction kettle under protection, stir evenly, raise the temperature to 50°C, and 2 Continue to stir and react for 4-6 hours under protection,...

Embodiment 2

[0041] Select α, ω-divinyl polydimethylsiloxane with a viscosity of 5000mpa s, dimethyl silicone oil with a viscosity of 100mpa s, silane-modified polyisobutylene with a molecular weight of 10000, vinyl silicon chloroplatinic acid The oxane chelate is a platinum catalyst, and the specific component ratio is as follows:

[0042] A. 100 parts of α, ω-divinyl polydimethylsiloxane;

[0043] B. 6 parts of hydrotrimethoxysilane;

[0044] C. 1.5 parts of platinum catalysts;

[0045] D. 10 parts of simethicone oil;

[0046]E. 25 parts of silane-modified polyisobutylene;

[0047] F. 5 parts of vinyltrimethoxysilane;

[0048] G. 1.5 parts of aminopropyltrimethoxysilane;

[0049] H. 80 parts of calcium carbonate, 8 parts of fumed white carbon black;

[0050] I. 3 parts of bis(ethyl acetoacetate) diisopropyl titanate.

[0051] N 2 Add A, B, and C into the reaction kettle under protection, stir evenly, raise the temperature to 50°C, and 2 Continue to stir and react for 4-6 hours ...

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Abstract

The invention discloses a low-moisture-permeability single-component dealcoholization type room-temperature silicon sulfide rubber sealing agent and a preparation method thereof. The sealing agent consists of the components in parts by weight: 100 parts of alpha, omega-divinyl polydimethylsiloxane, 3-8 parts of hydrogen-based silane, 0.5-3 parts of a platinum catalyst, 3-10 parts of simethicone, 10-30 parts of silane-modified polyisobutylene, 3-8 parts of a crosslinking agent, 1-5 parts of a silane coupling agent, 50-150 parts of a reinforcement filler and 1-5 parts of a catalyst. Compared with conventional single-component dealcoholization type room-temperature silicon sulfide rubber, the sealing agent disclosed by the invention has improved sealing performance and is low in moisture permeability, and harm to a sealing component due to invasion of water vapor can be effectively prevented.

Description

technical field [0001] The invention relates to a sealant and a preparation method thereof, in particular to a one-component dealcoholized room temperature vulcanized silicone rubber sealant with low moisture permeability and a preparation method thereof. Background technique [0002] One-component dealcoholized room temperature vulcanized silicone rubber sealant refers to a sealant that is made of silicone resin as the base resin, mixed with dealcoholized crosslinking agent, filler, catalyst and other components, and can be cured at room temperature , due to the advantages of room temperature curing, wide temperature range, good weather resistance, excellent insulation performance, etc., it has been widely used in construction, automobile, electronics and other industries. At the same time, because it solidifies and releases small alcohol molecules, it has the advantages of low odor and no corrosion compared with deketoxime and deacidification, and is especially suitable fo...

Claims

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Application Information

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IPC IPC(8): C09J183/07C09J123/22C09J183/05C09J183/04C09J11/04C09J11/06
Inventor 王德波苏丹王瑶肖明
Owner 富乐(苏州)新材料有限公司
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