Silastic prescription and producing technique thereof

A silicone rubber and formulation technology, applied in the formulation and production process of silicone rubber, to achieve the effect of ensuring stability and durability and reducing elongation

Active Publication Date: 2009-09-16
QINGDAO HUILU SILICONE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Silicone rubber products in the prior art, under the premise of a certain hardness and specific gravity, have corresponding physical p

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Example 1, production formula: taking methyl vinyl raw rubber as the base, accounting for the weight ratio of methyl vinyl raw rubber: 30% of white carbon black, 2% of hydroxyl silicone oil, 0.5% of diethyldiethoxysilane, hard Zinc acetate 0.1%, vinyltriethoxysilane 0.5%.

[0033] Production process: Methyl vinyl raw rubber, hydroxy silicone oil, diethyldiethoxysilane, zinc stearate, and vinyltriethoxysilane are put into the vacuum kneader at one time, with a vapor pressure of 0.5Mpa and a speed of 25rpm , time 6h, white carbon black 70% for the first time, after the rubber material is formed into agglomerates, then add the remaining 30%. The heating rate is to raise the temperature. When the temperature of the rubber material rises to 170°C, start vacuuming and maintain the vacuum degree at 0.06Mpa for 2 hours. After the vacuum is over, cool down and cool down. When the temperature of the rubber material reaches 80°C, discharge the material and filter it for packaging....

Embodiment 2

[0035] Embodiment 2, production formula: take methyl vinyl raw rubber as base number, account for methyl vinyl raw rubber weight ratio: white carbon black 60%, hydroxyl silicone oil 8%, diethyldiethoxysilane 2%, hard Zinc acetate 0.4%, vinyltriethoxysilane 3%.

[0036] Production process: Methyl vinyl raw rubber, hydroxy silicone oil, diethyldiethoxysilane, zinc stearate, and vinyltriethoxysilane are put into the vacuum kneader at one time, with a vapor pressure of 0.6Mpa and a speed of 25rpm , time 6h, white carbon black 70% for the first time, after the rubber material is formed into agglomerates, then put in the remaining 30%. The heating rate is to raise the temperature. When the temperature of the rubber material rises to 170°C, start vacuuming, and the vacuum degree is maintained at 0.06Mpa for 2 hours. After the vacuum is over, cool down and cool down. When the temperature of the rubber material is 80°C, discharge the material, filter and pack.

[0037] The physical pr...

Embodiment 3

[0038] Embodiment 3, production formula: take methyl vinyl raw rubber as the base number, account for the weight ratio of methyl vinyl raw rubber: white carbon black 45%, hydroxyl silicone oil 5%, diethyldiethoxysilane 1.2%, hard Zinc acetate 0.25%, vinyltriethoxysilane 1.5%.

[0039]Production process: Methyl vinyl raw rubber, hydroxy silicone oil, diethyldiethoxysilane, release agent, vinyltriethoxysilane are put into the vacuum kneader at one time, the vapor pressure is 0.6Mpa, and the speed is 25rpm , time 6h, white carbon black 70% for the first time, after the rubber material is formed into agglomerates, then add the remaining 30%. The heating rate is to raise the temperature. When the temperature of the rubber material rises to 170°C, start vacuuming and maintain the vacuum degree at 0.06Mpa for 2 hours. After the vacuum is over, cool down and cool down. When the temperature of the rubber material reaches 80°C, discharge the material and filter it for packaging.

[004...

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PUM

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Abstract

The invention discloses a Silastic prescription and producing technique thereof. The main technical problem is making the Silastic have characteristic of low extensive rate. The prescription of the invention takes the methyl ethylene as the benchmark weight, the white soot carbon having 30-60% weight methyl ethylene; 2-8% hydroxide radical silicon oil; 0.5-2% diethyl dioxyethyl silane; 0.5-3% ethylene triethoxy silane. The producing technique comprising the following steps: conglobating the materials, increasing the temperature to 165-170 centigrade; the vacuum degree 0.04-0.08 MPa; time 1-3 h; then decreasing the temperature to 80 centigrade to obtain the Silastic. The invention uses the ethylene triethoxy silane to change the radical capacity of the physical property of the gross rubber, reducing the extensive rate of the Silastic to satisfy the requirement of the special product and assure the product operating stability and durability compared to the current technology.

Description

technical field [0001] The invention relates to a formula and a production process of rubber, in particular to a formula and a production process of silicone rubber. Background technique [0002] Silicone rubber products in the prior art, under the premise of certain hardness and specific gravity, have corresponding relationships in their physical properties: hardness, specific gravity, elongation strength, elongation, and tear strength, which cannot be changed under normal circumstances. Some products using silicone rubber: such as the silicone rubber products used in the rollers of CD players, have special requirements for the physical properties of silicone rubber: under normal hardness and specific gravity conditions, the elongation strength, tear strength, and maximum torque must not exceed Changes, even better, and require a lower elongation, so that the CD player can meet the normal working conditions without failure and ensure a long service life. Contents of the i...

Claims

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Application Information

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IPC IPC(8): C08L83/04C08K3/36C08K5/5419
Inventor 河兴燮
Owner QINGDAO HUILU SILICONE CO LTD
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