PA base material and silica gel combined primer-free special platinum vulcanizing agent and preparation method thereof

A platinum vulcanizing agent and platinum catalyst technology, applied in the polymer field, can solve the problems of easy degumming, insufficient dimensional accuracy, insufficient hardness and elastic modulus, and achieve the effect of high crosslinking density, high bonding strength and improving bonding force.

Active Publication Date: 2021-01-29
东莞市众展有机硅材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The disadvantages of polyamide are: insufficient dimensional accuracy due to thermal expansion and water absorption, poor acid resistance, insufficient hardness and elastic modulus
Although the platinum vulcanizing agent can achieve the purpose of cross-linking and vulcanization, it still cannot solve the problem that the PA substrate is not suitable for direct bonding with liquid silica gel and is easy to degumming; that is, it is still necessary to brush the surface pretreatment of the joint to improve PA. Adhesive strength between substrate and silicone

Method used

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  • PA base material and silica gel combined primer-free special platinum vulcanizing agent and preparation method thereof
  • PA base material and silica gel combined primer-free special platinum vulcanizing agent and preparation method thereof

Examples

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Embodiment 1

[0039] A special platinum vulcanizing agent for primer-free coating in combination with PA substrates and silica gel in this embodiment includes agent A and agent B, and each dosage form includes the following components in parts by weight:

[0040] Agent A: 45 parts of methyl vinyl silicone rubber (raw rubber, Dongjue silicone, molecular weight 600,000-800,000), platinum catalyst (1,3-divinyl-1,1,3,3-tetramethyl Platinum disiloxane (0), ~Pt 5000ppm solution) 50 parts, hydrophobic silica (Cabot TS720, specific surface area is 250-400m 2 / g) 10 parts;

[0041] Agent B: 65 parts of methyl vinyl silicone rubber (raw rubber, Dongjue silicone, molecular weight 600,000-800,000), vinyl hydrogen-containing silicone oil (XB-714, vinyl content 5%, hydrogen content 0.15% ) 45 parts, polysiloxane-polyurethane adhesive 40 parts, hydrophobic silica (Cabot TS720, specific surface area is 250-400m 2 / g) 10 parts, acetylenic alcohol compound inhibitor (acetylene cyclohexanol) 1 part.

[004...

Embodiment 2

[0048] A special platinum vulcanizing agent for primer-free coating in combination with PA substrates and silica gel in this embodiment includes agent A and agent B, and each dosage form includes the following components in parts by weight:

[0049] Agent A: 40 parts of methyl vinyl silicone rubber (raw rubber, Dongjue silicone, molecular weight 1.6-1.8 million), platinum catalyst (1,3-divinyl-1,1,3,3-tetramethyl Platinum disiloxane (0), ~Pt 5000ppm solution) 45 parts, hydrophobic silica (Cabot TS720, specific surface area is 250-400m 2 / g) 8 parts;

[0050] Agent B: 70 parts of methyl vinyl silicone rubber (raw rubber, Dongjue silicone, molecular weight 1.6-1.8 million), vinyl hydrogen-containing silicone oil (XB-714, vinyl content 0.25%, hydrogen content 1.0% ) 50 parts, polysiloxane-polyurethane adhesive 45 parts, hydrophobic silica (Cabot TS720, specific surface area is 250-400m 2 / g) 15 parts, acetylenic alcohol compound inhibitor (silanized acetylenic alcohol) 2 parts....

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Abstract

The invention relates to the field of platinum vulcanizing agents, and discloses a PA base material and silica gel combined primer-free special platinum vulcanizing agent and a preparation method thereof. The platinum vulcanizing agent comprises an agent A and an agent B. The agent A is prepared from 40 to 48 parts of methyl vinyl silicone rubber, 45 to 55 parts of platinum catalyst and 8 to 12 parts of hydrophobic white carbon black; the agent B is prepared from 60 to 70 parts of methyl vinyl silicone rubber, 40 to 50 parts of vinyl hydrogen-containing silicone oil, 35 to 45 parts of a polysiloxane-polyurethane adhesive, 5 to 15 parts of hydrophobic white carbon black and 0.5 to 3 parts of an alkynol compound inhibitor. The polysiloxane -polyurethane adhesive is added into the platinum vulcanizing agent provided by the invention, so that the platinum vulcanizing agent can be better suitable for combination of a PA base material and silica gel, and the binding force of the PA base material and the silica gel is improved.

Description

technical field [0001] The invention relates to a platinum vulcanizing agent, in particular to a special platinum vulcanizing agent combined with a PA base material and silica gel for primer-free coating and its preparation, belonging to the technical field of polymers. Background technique [0002] Nylon (Nylon, Polyamide, referred to as PA) refers to a plastic composed of polyamide resin. This kind of resin can be prepared by polycondensation of diamine and dibasic acid, or by ring-opening polymerization of lactam formed after dehydration of amino acid. Unlike PS, PE, PP, etc., PA does not gradually change with the increase of heating temperature. Softening, but softening in a narrow temperature range close to the melting point, the melting point is obvious, melting point: 215-225 ° C. Flow occurs once the temperature is reached. [0003] There are many varieties of PA, mainly PA6, PA66, PA610, PA11, PA12, PA1010, PA612, PA46, PA6T, PA9T, MXD-6 aromatic polyamide, etc. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D183/07C09D183/04C09D175/04C09D7/61C09D7/63C09D7/65C09D5/00
CPCC08K2201/006C08L2205/025C08L2205/035C09D5/002C09D183/04C09D7/61C09D7/63C09D7/65C08L83/04C08L75/04C08K7/26C08K5/0091
Inventor 段定敏周明泽梅永志黄高元李其悦陈家振
Owner 东莞市众展有机硅材料有限公司
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