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 it

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
Comparison scheme
Effect test

Example Embodiment

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

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

[0037] (2) 100 parts by mass of base gum, 1 to 5 parts by mass of hydrogen-containing silicone oil, and 0.01 to 0.05 parts by mass of inhibitor are added to the stirred tank and mixed uniformly;

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

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

Example Embodiment

[0040] Example 1

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

[0042] The preparation method of vinyl silicone oil is as follows: 100 parts by mass of octamethylcyclotetrasiloxane and 3 parts by mass of tetramethyldivinyldisiloxane are mixed, and 0.03 parts by mass of the catalyst tetramethylhydroxide are added under stirring. Ammonium was heated to 120°C for polymerization for 2 hour...

Example Embodiment

[0053] Example 2

[0054] The vinyl silicone oil involved in this embodiment is a vinyl-terminated polysiloxane with a viscosity of 500mPa.s at 25°C and a vinyl mass content of 1.6%; MQ silicone resin has a viscosity of 500mPa.s at 25°C. The vinyl-containing MQ silicone resin with a mass content of 2.0%; the platinum mass content of the platinum catalyst is 3000 ppm; the hydrogen-containing silicone oil is a hydrogen-containing polysiloxane with a viscosity of 60 mPa.s at 25°C and a hydrogen mass content of 1.5%; The inhibitor is compound modified by heptamethylcyclotetrasiloxane and ethynyl-1-cyclohexanol with 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 parts by mass of tetramethyldivinyl disiloxane are mixed, and 0.01 parts by mass of the catalyst tetramethylhydroxide are added under stirring. Ammonium was heated to 100°C for polymer...

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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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