Preparation method of hydrosilylation/free radical dual-crosslinking organic silicon pressure-sensitive adhesive

A silicone pressure-sensitive adhesive and hydrosilylation technology, used in film/sheet adhesives, adhesives, adhesive additives, etc. glue, etc.

Inactive Publication Date: 2013-09-18
INST OF PETROCHEM HEILONGJIANG ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the problem that the current method for preparing silicone pressure-sensitive adhesives cannot produce high-performance silicone pressure-sensitive adhesives with both good initial tack performance and good tack-holdin

Method used

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Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0011] Embodiment 1: In this embodiment, a method for preparing a hydrosilylation / radical double-crosslinked silicone pressure-sensitive adhesive is carried out according to the following steps:

[0012] 1. Weigh 0.01 to 1 part of catalyst, 0 to 5 parts of octafluoropentyl alcohol, 20 to 80 parts of silicone rubber, 20 to 80 parts of silicone resin, 50 parts to 150 parts of solvent, 1 to 10 parts of hydrogen-containing silicone oil, 1.0×10 -4 Serving ~ 5.0×10 -4 Parts of platinum catalyst and 1 to 5 parts of peroxide free radical crosslinking agent; and the total weight parts of the catalyst, octafluoropentanol, silicone rubber and silicone resin is 70 to 150 parts share;

[0013] 2. Add 0.01 to 1 part of catalyst, 0 to 5 parts of octafluoropentanol, 20 to 80 parts of silicone rubber and 20 to 80 parts of silicone resin weighed in step 1 to step 1 Weigh 50 to 150 parts of the solvent, dissolve and mix to obtain a reaction solution, then heat the reaction solution from room ...

specific Embodiment approach 2

[0017] Specific embodiment two: the difference between this embodiment and specific embodiment one is that: the catalyst described in step one is dibutyltin dilaurate; the organosilicon rubber described in step one is dimethyl silicone rubber, methyl ethylene base silicone rubber and methyl phenyl vinyl silicone rubber or a mixture of several, and the average molecular weight of the silicone rubber is 450,000 to 700,000; the silicone resin in step 1 is a Base MQ silicone resin, methyl vinyl MQ silicone resin and phenyl vinyl MQ silicone resin or a mixture of several, and the average vinyl mass fraction of the silicone resin is 0.5% to 5.6% The solvent described in step one is one or more mixtures in benzene, toluene, ethyl acetate and xylene; the hydrogen-containing silicone oil described in step one is methyl hydrogen-containing silicone oil and phenyl hydrogen-containing silicone oil The mixture of one or both of them; the platinum series catalyst described in step one is ch...

specific Embodiment approach 3

[0018] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that in step one, 0.1 to 0.5 parts of catalyst, 2 to 4 parts of octafluoropentanol, 40 ~60 parts of silicone rubber, 40~60 parts of silicone resin, 80~120 parts of solvent, 4~7 parts of hydrogen-containing silicone oil, 2.0×10 -4 Servings ~ 4.0×10 -4 Parts of platinum catalyst, 2 to 4 parts of peroxide free radical crosslinking agent; and the total weight parts of the catalyst, octafluoropentanol, silicone rubber and silicone resin is 90 to 120 parts share. Others are the same as those in the first or second embodiment.

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PUM

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Abstract

The invention discloses a preparation method of a hydrosilylation/free radical dual-crosslinking organic silicon pressure-sensitive adhesive and relates to a preparation method of an organic silicon pressure-sensitive adhesive. The invention aims at solving the technical problem that the existing method for preparing organic silicon pressure-sensitive adhesive cannot be used for preparing a high-performance organic silicon pressure-sensitive adhesive with initial adhesion performance and permanent adhesion performance, high peel strength, a board using temperature range and a remarkable moisture-resistant anti-ageing effect. The preparation method of the hydrosilylation/free radical dual-crosslinking organic silicon pressure-sensitive adhesive comprises the following steps of: firstly, weighing materials; secondly, preparing condensed adhesive liquor; thirdly, preparing un-cross-linked organic silicon pressure-sensitive adhesive liquor; fourthly, preparing hydrosilylation/free radical dual-crosslinking organic silicon pressure-sensitive adhesive. The organic silicon pressure-sensitive glue prepared by the preparation method disclosed by the invention can be applied in the fields of aviation, spaceflight, machinery, electronics, boats and the like.

Description

technical field [0001] The invention relates to a preparation method of silicone pressure-sensitive adhesive. Background technique [0002] Silicone pressure-sensitive adhesives are generally composed of silicone rubber, silicone resin, catalysts, crosslinking agents and additives, etc. Such low surface energy difficult-to-bond materials have good bonding properties, and can even bond interfaces with moisture and oil; they have excellent chemical resistance and environmental stability, and can be used in a wide temperature range of -100 ° C to 260 ° C It can maintain stable performance for a long time; therefore, silicone pressure-sensitive adhesives have been widely used in aviation, aerospace, machinery, electronics, ships and other fields. For silicone pressure-sensitive adhesives, the current effective cross-linking methods are mainly free radical cross-linking induced by peroxide, hydrosilylation cross-linking and ultraviolet (UV) radiation cross-linking, among which t...

Claims

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Application Information

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IPC IPC(8): C09J183/04C09J183/07C09J183/05C09J11/06C09J7/02C08J3/24
Inventor 张绪刚张斌刘彩召隋月梅孙明明赵明李坚辉薛刚王磊李奇力
Owner INST OF PETROCHEM HEILONGJIANG ACADEMY OF SCI
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