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One-component addition type liquid silicone rubber and preparation method thereof

A liquid silicone rubber, one-component technology, applied in the field of silicone gel, can solve the problem of high production cost, achieve the effects of low cost, save production cost, and improve storage performance

Inactive Publication Date: 2016-01-13
JIANGSU TIANCHEN NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a one-component addition-type liquid silicone rubber and its preparation method to solve the problem of high production cost of the existing addition-type liquid silicone rubber

Method used

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  • One-component addition type liquid silicone rubber and preparation method thereof
  • One-component addition type liquid silicone rubber and preparation method thereof
  • One-component addition type liquid silicone rubber and preparation method thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0035] The preparation method of the above-mentioned one-component addition type liquid silicone rubber is:

[0036] (1) Preparation of base rubber: Add 100 parts by mass of vinyl silicone oil into the kneader and stir at room temperature for 0.5-1h, add MQ silicone resin with a formula amount of 25%-50% and stir for 0.5-1h, then add the remaining MQ silicone resin, and continue stirring 3 to 5 hours to obtain base rubber;

[0037] (2) Add 100 parts by mass of rubber base, 1 to 5 parts by mass of hydrogen-containing silicone oil, and 0.01 to 0.05 parts by mass of inhibitor into the stirring tank, and mix well;

[0038] (3) Add 0.01 to 0.05 parts by mass of platinum catalyst to step (2), and mix uniformly;

[0039] (4) The product is molded and vulcanized on a flat vulcanizer, the vulcanization temperature is 100-140° C., and the vulcanization time is 5-10 minutes to obtain the one-component liquid silicone rubber.

Embodiment 1

[0041] The vinyl silicone oil involved in this example is a vinyl-terminated polysiloxane with a viscosity of 1000mPa.s at 25°C and a vinyl mass content of 1.2%; MQ silicone oil has a viscosity of 200mPa.s at 25°C and a vinyl The mass content is 2.5% vinyl-containing MQ silicone resin; the platinum mass content of the platinum catalyst is 2000ppm; the hydrogen-containing silicone oil has a viscosity of 300mPa.s at 25°C and a hydrogen-containing polysiloxane with a hydrogen mass content of 1.0%; The inhibitor is compounded and modified by heptamethylcyclotetrasiloxane and ethynyl-1-cyclohexanol in a molar ratio of 1 to 2 under the action of chloroplatinic acid.

[0042] The preparation method of vinyl silicone oil is as follows: mix 100 parts by mass of octamethylcyclotetrasiloxane and 3 parts by mass of tetramethyldivinyldisiloxane, add 0.03 parts by mass of catalyst tetramethylhydrogenation under stirring ammonium, the temperature was raised to 120°C for 2 hours of polymeriza...

Embodiment 2

[0054] The vinyl silicone oil involved in this example is a vinyl-terminated polysiloxane with a viscosity of 500mPa.s at 25°C and a vinyl mass content of 1.6%; MQ silicone oil has a viscosity of 500mPa.s at 25°C and a vinyl The mass content is 2.0% vinyl-containing MQ silicone resin; the platinum mass content of the platinum catalyst is 3000ppm; the hydrogen-containing silicone oil is a hydrogen-containing polysiloxane with a viscosity of 60mPa.s at 25°C and a hydrogen mass content of 1.5%; The inhibitor is compounded and modified by heptamethylcyclotetrasiloxane and ethynyl-1-cyclohexanol in a molar ratio of 1 to 1 under the action of chloroplatinic acid.

[0055] The preparation method of vinyl silicone oil is as follows: 100 parts by mass of octamethylcyclotetrasiloxane and 0.1 part by mass of tetramethyldivinyldisiloxane are mixed, and 0.01 part by mass of catalyst tetramethylhydrogenation is added under stirring ammonium, heated to 100°C for 4 hours, then raised to 150°C...

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Abstract

The invention discloses one-component addition type liquid silicone rubber and a preparation method thereof. The one-component addition type liquid silicone rubber comprises the following raw materials in parts by mass: 100 parts of base rubber, 0.01-0.05 part of platinum catalyst, 1-5 parts of hydrogen-containing silicone oil and 0.02-0.1 part of inhibitor. The invention also discloses a preparation method of the one-component addition type liquid silicone rubber. The prepared one-component addition type liquid silicone rubber and the preparation method have the beneficial effects that one-component storage of the liquid silicone rubber is achieved by adding the reaction inhibitor; the liquid silicone rubber is unnecessary to be divided into components A and B; meanwhile, the liquid silicone rubber also has longer shelf life, high strength and good flowability and has industrial value; the preparation method is simple and practicable, is low in cost and is suitable for large-scale production.

Description

technical field [0001] The invention relates to the technical field of silicone gel, in particular to a single-component liquid silicone rubber with good storage properties and a preparation method thereof Background technique [0002] Liquid silicone rubber is also called two-component additive silicone rubber. Liquid silicone rubber is a type of silicone rubber compared to mixing semi-solid silicone rubber and common room temperature vulcanized single-component silicone rubber. This type of silicone rubber has good fluidity, fast vulcanization, and can be cast or injected. Liquid silicone rubber is divided into two categories: self-adhesive and non-self-adhesive. Liquid silicone can be cured at room temperature or at high temperature. High temperature curing can complete the curing process within seconds. [0003] In order to facilitate storage, liquid silicone rubber generally needs to be made into two components, A and B. When used, the components A and B are mixed in...

Claims

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Application Information

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IPC IPC(8): C08L83/07C08L83/05C08G77/20C08G77/08B29C35/02
Inventor 陆磊张旭蔡杨
Owner JIANGSU TIANCHEN NEW MATERIALS
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