Organic silicon hydrogen-containing tackifying crosslinking agent for addition type silicon rubber and preparation method thereof

A technology of organosilicon and crosslinking agent is applied in the field of silicone hydrogen-containing tackifying crosslinking agent for addition type silicone rubber and its preparation, which can solve the problems of non-polarity, no polar group, poor adhesion and the like , to achieve mild reaction conditions, simple preparation process and good controllability

Inactive Publication Date: 2018-08-10
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no polar group on the main chain of the silicon-oxygen bond molecule of the addition-type silicone rubber, and the molecular chain is helical and coiled, surrounded by many methyl groups, and these methyl groups have a shielding effect on the polarity of the Si-O bond. , thus making the whole molecule nonpolar
This results in low surface energy of addition silicone rubbers and poor adhesion to plastic or metal substrates
[0003] At present, there are three main methods to improve the adhesion of addition-type silicone rubber: First, use a primer to

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Preparation of silicone hydrogen-containing viscosifying crosslinking agent for addition-type silicone rubber:

[0033] (1) Mix 0.2mol high hydrogen-containing silicone oil (refractive index 1.56) with 0.1mol vinyl epoxy cyclohexane evenly, add 150 microliters of Karstedt type Pt-allyl polyether complex of 10g / L, in Under the conditions of 150° C. and 250 rpm, a hydrosilylation reaction was carried out for 2 hours to obtain a crude product of the silicone hydrogen-containing viscosity-enhancing cross-linking agent.

[0034] (2) The crude product obtained in step (1) was distilled under reduced pressure at 120°C and 0.096 MPa to remove low-boiling impurities, and 0.01 g of 1-ethynyl-1-cyclohexanol was added to obtain an organic compound for addition-type silicone rubber. Silicon hydrogen-containing viscosity-enhancing cross-linking agent with a refractive index of 1.55.

Embodiment 2

[0036] Preparation of silicone hydrogen-containing viscosifying crosslinking agent for addition-type silicone rubber:

[0037] (1) Add 0.2mol D 4 Mix H (refractive index 1.40) and 0.15mol allyl glycidyl ether evenly, add 180 microliters of 10g / L Pt-isopropanol complex, and carry out hydrosilylation reaction at 110°C and 200rpm for 3h , to obtain the crude product of organosilicon hydrogen-containing tackifying cross-linking agent.

[0038] (2) The crude product obtained in step (1) was distilled under reduced pressure at 120°C and 0.096 MPa to remove low-boiling impurities, and 0.01 g of 1-ethynyl-1-cyclohexanol was added to obtain an organic compound for addition-type silicone rubber. Silicon-hydrogen viscosity-enhancing cross-linking agent with a refractive index of 1.40.

Embodiment 3

[0040] Preparation of silicone hydrogen-containing viscosifying crosslinking agent for addition-type silicone rubber:

[0041] (1) Mix 0.2mol high hydrogen-containing silicone oil (refractive index 1.480) with 0.12mol vinyl epoxy cyclohexane evenly, add 130 microliters of Karstedt type Pt-vinyl silicone oil complex of 10g / L, and heat at 100°C , under the condition of 100rpm, the hydrosilylation reaction was carried out for 6h, and the crude product of silicone hydrogen-containing viscosifying crosslinking agent was obtained.

[0042] (2) The crude product obtained in step (1) was distilled under reduced pressure at 120°C and 0.096 MPa to remove low-boiling impurities, and 0.01 g of 1-ethynyl-1-cyclohexanol was added to obtain an organic compound for addition-type silicone rubber. Silicon-hydrogen viscosity-enhancing cross-linking agent with a refractive index of 1.475.

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Abstract

The invention belongs to the technical field of a tackifying crosslinking agent, and particularly relates to an organic silicon hydrogen-containing tackifying crosslinking agent for addition type silicon rubber and a preparation method thereof. The tackifying crosslinking agent is prepared by performing addition reaction on high-hydrogen-content silicon oil or D4H and vinyl cyclohexene oxide or allyl glycidyl ether and then adding inhibitors. The process is simple; the reaction conditions are mild; the therepeatability and the controllability are good; the impurities in the reaction process are few; organic solvents are not used; the environment is protected; no pollution is caused. The obtained tackifying crosslinking agent has the stable performance; the tackifying and crosslinking effects can be achieved at the same time. The compatibility with silicon rubber is good; no catalyst poisoning phenomenon exists; the bonding performance of the addition type silicon rubber with metal suchas copper foil can be obviously improved; in addition, the refractive index of the organic silicon hydrogen-containing tackifying crosslinking agent is adjustable and controllable in a range of 1.40to 1.55, so that the tackifying crosslinking agent is applicable to the silicon rubber with (high and low) different refractive indexes.

Description

technical field [0001] The invention belongs to the technical field of viscosifying crosslinking agents, and in particular relates to a silicone hydrogen-containing viscosifying crosslinking agent for addition-type silicone rubber and a preparation method thereof. Background technique [0002] The curing methods of silicone rubber mainly include thermal vulcanization, condensation curing and addition curing. Among them, the silicone rubber prepared by addition curing method has small shrinkage rate, fast curing speed and high mechanical strength. Therefore, addition silicone rubber is widely used in industries such as automobile, electronics, power supply and LED packaging. However, there is no polar group on the main chain of the silicon-oxygen bond molecule of the addition-type silicone rubber, and the molecular chain is helical and coiled, surrounded by many methyl groups, and these methyl groups have a shielding effect on the polarity of the Si-O bond. , thus rendering ...

Claims

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Application Information

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IPC IPC(8): C08G77/38
CPCC08G77/38
Inventor 潘朝群孙锐
Owner SOUTH CHINA UNIV OF TECH
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