Two-component room-temperature-vulcanized silicone rubber and its individual packaging method

A technology of room temperature vulcanization and silicone rubber, which is applied in the direction of transportation and packaging, containers with multiple items, containers, etc. It can solve the problems of poor bonding ability of room temperature vulcanization silicone rubber, and achieve fast curing speed at room temperature, easy to carry and transport and Useful, easy-to-adjust effects

Inactive Publication Date: 2006-11-22
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In order to overcome the disadvantages of poor bonding ability of RTV2 type room temperature vulcanized silicone rubber in the prior art, the present invention provides a two-component room temperature vulcanized silicone rubber and a single packaging method for this silicone rubber, which uses hydroxyl water-soluble polymer or polymer Emulsion as a cross-linking agent, single packaged with an extrusion gun with A and B dual tubes

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1: (1) 13.6% (weight) polyvinyl alcohol aqueous solution, 3.4% (weight) dibutyltin dilaurate are mixed uniformly at room temperature, and the mixture is B component.

[0020] (2) 68% (weight) of hydroxyl-terminated dimethyl silicone rubber base material, 13.6% (weight) of fumed silica, and 1.4% (weight) of titanium dioxide were mixed uniformly at room temperature. The mixture is the A component.

[0021] (3) The above two mixtures are injected into the A and B tubes of the screw extrusion gun according to the ratio of A component / B component to 5 / 1.

[0022] To use, quickly squeeze it out where you need it. After testing, the curing time of the silicone rubber at room temperature is 9 minutes, and the bonding strength is ≥ 1.5 MPa.

Embodiment 2

[0023] Embodiment 2: (1) 1% (weight) sodium carboxymethylcellulose, 0.15% (weight) dibutyltin dilaurate are mixed homogeneously. The mixture is the B component.

[0024] (2) 64% (weight) of hydroxyl-terminated dimethyl silicone rubber base material, 25.3% (weight) of fumed silica, and 9.55% (weight) of tetraethyl orthosilicate were mixed uniformly at room temperature. The mixture is the A component.

[0025] (3) The above two mixtures are injected into the A and B tubes of the screw extrusion gun according to the ratio of A component / B component to 3 / 2.

[0026] To use, quickly squeeze it out where you need it. After testing, the curing time of the silicone rubber at room temperature is 10 minutes, and the bonding strength is ≥1.2MPa.

Embodiment 3

[0027] Embodiment 3: (1) use 5% (weight) emulsion containing styrene as B component.

[0028] (2) 62% (weight) of hydroxyl-terminated phenylmethyl silicone rubber base material, 19.4% (weight) of fumed silica, 5.05% of MeSi(ONEt 2 ) 3 , 8.5% fillers such as titanium dioxide, and 0.05% organic titanium are mixed uniformly at room temperature. The mixture is the A component.

[0029] (3) The above two mixtures are injected into the A and B tubes of the screw extrusion gun according to the ratio of A component / B component to 6 / 1.

[0030] To use, quickly squeeze it out where you need it. After testing, the curing time of the silicone rubber at room temperature is 5 minutes, and the bonding strength is ≥ 1.5 MPa.

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Abstract

The invention discloses a two-component room temperature vulcanized silicone rubber and a single packaging method thereof. Its purpose is to solve the problem that the single-component RTV silicone rubber in the prior art cannot achieve deep vulcanization, and the two-component RTV silicone rubber has poor bonding ability. It is characterized in that the water-soluble polymer solution or polymer emulsion containing hydroxyl Curing agent, catalyst as component B, crosslinking agent, base rubber, and reinforcing filler as component A are packaged separately, among them, the hydroxyl water-soluble polymer solution or polymer emulsion in component B can make the silicone rubber deeply vulcanized And improve the bonding ability of two-component room temperature vulcanized silicone rubber. It is single-packed with an extrusion gun with A and B double tubes, which is convenient to carry and transport and easy to use. It can be cured quickly at room temperature and has low cost.

Description

technical field [0001] The invention relates to a two-component room temperature vulcanizing sealant, and also relates to a single packaging method of the sealant. Background technique [0002] Room temperature vulcanized silicone rubber is based on hydroxyl-terminated polydimethylsiloxane, compounded with crosslinking agents, catalysts, fillers, etc. [0003] Room temperature vulcanized silicone rubber can be divided into single-component type (hereinafter referred to as RTV1 type) and double (multiple) component type (abbreviated as RTV2 type) according to the packaging form. [0004] RTV1 type is to mix base rubber, filler, crosslinking agent, catalyst, etc. under anhydrous conditions, seal them into tubes or cylinders and other containers for sale, and squeeze them out for use. The disadvantage of this type of silicone rubber sealant is that it takes a long time to fully cure, and generally it is difficult to fully cure when the thickness of the cured layer is greater t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L83/00C08K5/57B65D81/32
Inventor 张秋禹肖军孙九立
Owner NORTHWESTERN POLYTECHNICAL UNIV
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