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Tackifier, dealcoholized RTV silicone rubber and preparation method thereof

A tackifier, dealcohol-type technology, applied in adhesives, non-polymer adhesive additives, adhesive additives, etc., can solve problems such as unsatisfactory bonding effect

Active Publication Date: 2020-04-10
GUANGZHOU BAIYUN CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Usually, ordinary dealcoholized RTV silicone rubber uses silane coupling agent as a tackifier, which has good adhesion to most substrates, but the adhesion effect is not ideal for some difficult-to-bond materials

Method used

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  • Tackifier, dealcoholized RTV silicone rubber and preparation method thereof
  • Tackifier, dealcoholized RTV silicone rubber and preparation method thereof
  • Tackifier, dealcoholized RTV silicone rubber and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0112] The present embodiment provides a kind of dealcoholization type RTV silicone rubber tackifier, and its preparation method comprises the steps:

[0113] Put γ-aminopropyltrimethoxysilane and tetramethyldivinyldisilazane with a molar ratio of 1:1 into a reactor with heating, stirring and nitrogen protection, raise the temperature to 90°C, and under nitrogen protection , the reaction was continued for 10 h at a stirring speed of 60 rpm, and the reaction mixture was the tackifier, cooled, discharged, sealed and stored for later use.

Embodiment 2

[0115] This embodiment provides a one-component dealcoholized RTV silicone rubber sealant, the preparation method of which comprises the following steps:

[0116] Add 100 parts of alkoxy-terminated polydimethylsiloxane with a viscosity of 20,000 mPa·s at 25°C and 120 parts of nano-calcium carbonate into the planetary machine, heat to 100°C, and evacuate (vacuum degree is 0.09MPa ) dehydration, mixing evenly, after cooling, add 5 parts of methyltrimethoxysilane, 0.3 part of dioctyltin dilaurate under moisture-proof condition, vacuum (vacuum tightness is 0.09MPa) mix homogeneously; Then add 4.5 parts of embodiment 1 Prepared tackifier, vacuum (vacuum degree: 0.09MPa) mixed evenly, prepared into dealcoholized RTV silicone rubber sealant, denoted as sealant 1.

Embodiment 3

[0118] This embodiment provides a two-component dealcoholized RTV silicone rubber potting compound, the preparation method of which includes the following steps:

[0119] Preparation of component A: Add 100 parts of hydroxyl-terminated polydimethylsiloxane with a viscosity of 1500mPa·s at 25°C, 30 parts of silicon micropowder, and 1.3 parts of carbon black into the planetary machine, heat to 100°C, Vacuumize (vacuum degree is 0.09MPa) to dehydrate, make it evenly mixed, after cooling, seal it for use;

[0120] Preparation of component B: 100 parts of methyl-terminated polydimethylsiloxane with a viscosity of 50 mPa·s at 25°C, 32 parts of tetraethyl orthosilicate, and 20 parts of the tackifier prepared in Example 1 , 0.4 parts of dibutyltin dilaurate are put into the mixer, under the protection of nitrogen, mix evenly, and seal for use;

[0121] Preparation of dealcoholized RTV silicone rubber potting compound: Take 100 parts of component A and 10 parts of component B and mix ...

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Abstract

The invention relates to a tackifier, dealcoholized RTV silicone rubber and a preparation method thereof. The tackifier is composed of a mixture obtained through reaction of a compound shown in the formula (1) and a compound shown in the formula (2), wherein R is selected from C1-C6 alkyl; R1 is selected from C1-C10 alkyl; R2 is selected from C1-C10 alkylene; R3 is selected from -H, C1-C10 alkyl group, or amino-substituted C1-C6 alkyl group; a is selected from 0 or 1; R4 is selected from C1-C6 alkyl; and R5 is selected from C1-C6 alkenyl. The tackifier can be used for preparing the dealcoholized RTV silicone rubber, and can improve the adhesion property of the dealcoholized RTV silicone rubber to a base material.

Description

technical field [0001] The invention relates to the field of adhesives, in particular to a tackifier, dealcoholized RTV silicone rubber and a preparation method thereof. Background technique [0002] Dealcohol-type room temperature curing (RTV) silicone rubber is widely used in construction, automobiles, lighting, electronics, etc. field. [0003] Usually, ordinary dealcoholized RTV silicone rubber uses silane coupling agent as a tackifier, which has good adhesion to most substrates, but the adhesion effect is not ideal for some difficult-to-bond materials. Especially in recent years, with the development of polymer material science, the types and quantities of difficult-to-adhesive materials continue to expand, so it is necessary to continuously develop specific tackifiers to improve the adhesion of dealcoholized RTV silicone rubber to these materials . Contents of the invention [0004] Based on this, the object of the present invention is to provide a tackifier for p...

Claims

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Application Information

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IPC IPC(8): C09J11/06C09J183/04C09J11/04
CPCC08K2003/265C08K2201/011C08L2205/025C09J11/04C09J11/06C09J183/04C08K13/02C08K3/26C08K3/36C08K5/544C08L83/04C08K3/04
Inventor 陈精华石俊杰张健臻陈建军黄恒超
Owner GUANGZHOU BAIYUN CHEM IND
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