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UV moisture dual-curing silica gel

A dual-curing, silica gel technology, applied in the direction of adhesives, adhesive additives, non-polymer adhesive additives, etc., can solve the problems of slow initial curing speed of moisture-curing silica gel, corrosion of devices and circuit boards, etc.

Pending Publication Date: 2021-04-20
深圳斯多福新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a kind of UV moisture dual-curable silica gel to solve the problems raised in the above-mentioned background technology. The problem of slow initial curing speed of type silicone
Through the cross-linking and curing of vinyl alkoxy-terminated polydimethylsiloxane and mercapto-terminated polydimethylsiloxane under the action of photoinitiator, it does not contain acrylic acid polymer and acrylic acid monomer, and solves the problem Corrosion of devices, circuit boards and other materials

Method used

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Examples

Experimental program
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Embodiment 1

[0045] A UV moisture dual-curable silica gel, comprising: vinyl alkoxy-terminated polydimethylsiloxane, mercapto-terminated polydimethylsiloxane, filler, cross-linking agent, catalyst, and photoinitiator.

[0046] Concrete composition is as follows by weight part:

[0047]

[0048] Wherein the vinylalkoxy-terminated polydimethoxysiloxane in this embodiment contains vinyl and alkoxy bifunctional structure, and the specific structure is as follows:

[0049]

[0050] Among them, R 1 for vinyl, R 2 , R 3 , R 4 , R 5 independently selected from methyl alkoxy, ethyl alkoxy;

[0051] R 6 , R 7 independently selected from methylalkoxy, ethylalkoxy, propylalkoxy, vinylalkoxy, phenylalkoxy, long-chain saturated alkoxy and long-chain unsaturated alkoxy Any group in the group;

[0052] m is an integer of 10-100.

[0053] Wherein the mercapto-terminated polydimethoxysiloxane in the present embodiment has a specific structure as follows:

[0054]

[0055] Among them, X ...

Embodiment 2-14

[0062] The components of Examples 2-14 are the same as those of Example 1, but the proportions are different, see Table 1 for details.

Embodiment 15-22

[0064] The proportioning of Examples 15-22 is the same as that of Example 1, but the components are different, see Table 2 for details.

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Abstract

The invention discloses UV moisture dual-curing silica gel, which comprises the following components in parts by weight: 60-100 parts of vinyl alkoxy terminated polydimethylsiloxane, 40-60 parts of sulfydryl terminated polydimethylsiloxane, 5-20 parts of a cross-linking agent, 5-30 parts of filler, 1-10 parts of a catalyst and 1-10 parts of a photoinitiator. The vinyl alkoxy-terminated polydimethylsiloxane is used as main resin and contains a vinyl group and an alkoxy group at the same time, and the vinyl group is used as a UV curing group and is subjected to a click chemical reaction with sulfydryl-terminated polydimethylsilane under the promotion of a photoinitiator, so that a cross-linked cured film is formed; wherein the alkoxy group is used as a moisture curing group and is subjected to cross-linking polymerization with a cross-linking agent under the action of a catalyst. Compared with the prior art, firstly, UV curing is carried out to achieve rapid primary curing, the problem that the initial curing speed is low is solved, secondly, the existence of acrylic acid substances in a traditional UV moisture curing adhesive is avoided, the problem that the acrylic acid substances corrode materials such as devices and circuit boards is solved, and the product can be widely applied to bonding and sealing of electronic devices.

Description

technical field [0001] The invention belongs to the technical field of adhesive materials, in particular to a UV moisture dual-curable silica gel. Background technique [0002] Silica gel is widely used in the field of bonding and sealing, but the existing silica gel is a single moisture curing type of silica gel, which has the problem of slow initial curing speed. The UV curing coating is a new type of green and environmentally friendly coating, which has the advantages of low pollution, low energy consumption, and short curing time. [0003] The invention patent with the application number 201911365460.3 discloses a UV moisture double-curing silicone coating adhesive, which includes the following components in parts by mass: 60-150 parts of acrylic modified silicone resin; acrylic modified alkoxy-terminated 40-60 parts of silicone oil; 10-40 parts of acrylic modified silicone oil; 2-8 parts of curing accelerator; 0.02-3.0 parts of curing catalyst; 0.02-3.0 parts of UV ini...

Claims

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Application Information

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IPC IPC(8): C09J183/06C09J183/08C09J11/04C09J11/06
Inventor 孙思严肖敏刘敏渊
Owner 深圳斯多福新材料科技有限公司
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