High-strength single-component room temperature vulcanized silicone rubber

A room temperature vulcanization, one-component technology, used in polymer adhesive additives, non-polymer adhesive additives, adhesives, etc., can solve the problem of tensile strength, adhesion and chemical resistance, tensile strength Low cost, limited application range and other issues, to achieve the effects of improved mechanical strength, low cost, and convenient use

Inactive Publication Date: 2014-06-04
HUBEI HUITIAN NEW MATERIALS STOCK CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, silicone rubber has developed rapidly, but some shortcomings have also been exposed during use, such as poor tensile strength, adhesion and chemical resistance, which limit its application range
Generally speaking, room temperature vulcanized silicone rubber has good toughness and high elongation, but its tensile strength is low. The tensile strength of room temperature vulcanized silicone rubber without filler reinforcement is only about 0.6MPa. After filler reinforcement, the tensile strength It can only rise to 1.5~2 MPa

Method used

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  • High-strength single-component room temperature vulcanized silicone rubber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Example 1 Select a hydroxyl-terminated polydimethylsiloxane with a viscosity of 20000mPa·s and a dimethicone oil with a viscosity of 1000mPa·s, and its components are as follows:

[0032] 100 parts of hydroxyl-terminated polydimethylsiloxane polymer;

[0033] 60 parts of nano calcium carbonate;

[0034] Kaolin (2000 mesh) 37 parts;

[0035] Talc powder (600 mesh) 12 parts;

[0036] Fumed white carbon black 4 parts;

[0037] 33 parts of silicone oil plasticizers;

[0038] 3 parts of pigment;

[0039] 3 parts of vinyl tributylketoxime silane;

[0040] 7 parts of tetramethylketoxime silane;

[0041] 1 part of γ-(2,3-epoxypropoxy)propyltrimethoxysilane.

Embodiment 2

[0042] Example 2 Select a hydroxyl-terminated polydimethylsiloxane with a viscosity of 5000mPa·s and a dimethicone oil with a viscosity of 1000mPa·s, and its components are as follows:

[0043] 100 parts of hydroxyl-terminated polydimethylsiloxane polymer;

[0044] Kaolin (2000 mesh) 40 parts;

[0045] Talcum powder (400 mesh) 59 parts;

[0046] Fumed white carbon black 6 parts;

[0047] 33 parts of silicone oil plasticizers;

[0048] 3 parts of pigment;

[0049] 3 parts of vinyl tributylketoxime silane;

[0050] 3 parts of methyl tributylketoxime silane;

[0051] 1.7 parts of γ-(2,3-epoxypropoxy)propyltrimethoxysilane;

[0052]0.4 parts of dibutyltin dilaurate.

Embodiment 3

[0053] Example 3 selects 20000mPa·s and 50000mPa·s hydroxyl-terminated polydimethylsiloxane with a viscosity of 100mPa·s dimethicone, and its components are as follows:

[0054] 50 parts of 20000mPa·s hydroxyl-terminated polydimethylsiloxane polymer;

[0055] 50 parts of 50000mPa·s hydroxyl-terminated polydimethylsiloxane polymer;

[0056] 45 parts of nano calcium carbonate;

[0057] Kaolin (1250 mesh) 55 parts;

[0058] Fumed white carbon black 5 parts;

[0059] 33 parts of silicone oil plasticizers;

[0060] 3 parts of pigment;

[0061] 6 parts of methyl tributylketoxime silane;

[0062] 1.7 parts of γ-(2,3-epoxypropoxy)propyltrimethoxysilane;

[0063] 0.5 parts of dibutyltin dilaurate.

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Abstract

The invention discloses a high-strength single-component room temperature vulcanized silicone rubber, which belongs to the technical field of single-component room temperature vulcanized silicone rubber sealants, and mainly solves the problem that the tensile strength of organosilicone rubber in the prior art is low (less than 2MPa). The high-strength single-component room temperature vulcanized silicone rubber is mainly characterized by comprising (a) 100 parts of hydroxyl-terminated poly (dimethyl siloxane) polymer; (b) 90-150 parts of a reinforcing filler; (c) 4-10 parts of a thixotropic agent; (d) 15-33 parts of a silicone oil plasticizer; (e) 6-14 parts of a crosslinking agent; (f) 1.7-4 parts of a coupling agent; (g) 0-2.5 parts of a catalyst; and (h) 0.3-3 parts of a pigment. The tensile strength of the high-strength single-component room temperature vulcanized silicone rubber can reach above 3.0MPa, the elongation at break of is greater than 400%, the aluminum sheet, steel sheet adhesion force can reach 2.0Mpa, and the high-strength single-component room temperature vulcanized silicone rubber has the features of being simple in preparation process, low in cost, and easy to use.

Description

technical field [0001] The invention belongs to the technical field of one-component room temperature vulcanized silicone rubber sealant, in particular to a high tensile strength single component room temperature vulcanized silicone rubber sealant. Background technique [0002] Silicone rubber has excellent weather resistance, high and low temperature resistance, high hydrophobicity and good air permeability, etc., and can be used for a long time in the range of -60 ~ 200 ℃, safe and reliable, and has a long service life, so it is widely used in construction , electronics, machinery manufacturing, automobiles and other industrial fields. Silicone rubber has developed rapidly in recent years, but some shortcomings have also been exposed during use, such as poor tensile strength, adhesion and chemical resistance, which limit its application range. Generally speaking, room temperature vulcanized silicone rubber has good toughness and high elongation, but its tensile strength i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J183/06C09J11/04C09J11/06C09J11/08
Inventor 赵瑞王翠花韩胜利张虎极章锋
Owner HUBEI HUITIAN NEW MATERIALS STOCK CO LTD
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