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

A room temperature vulcanization, silicone rubber technology, applied in transportation and packaging, containers with multiple items, containers, etc., can solve problems such as poor adhesion of room temperature vulcanized silicone rubber, achieve room temperature curing speed, easy adjustment, cost low effect

Inactive Publication Date: 2005-11-30
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 ≥1.2 MPa.

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 bi-component room-temperature silicon sulfide rubber and its packing method. Existing bi-component room-temperature silicon sulfide rubber is added with water-solubility macromolecular solution or emulsion containing hydroxyl group as cross linker, so it can achieve sticking effect without handling surface of object. Meanwhile, the product possesses intrinsic properties such as fast curingprocess rate and deep consolidation.

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 Applications(China)
IPC IPC(8): C08L83/00
Inventor 张秋禹肖军孙九立
Owner NORTHWESTERN POLYTECHNICAL UNIV
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