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A polysiloxane composition

A polysiloxane and composition technology, which is applied in the fields of addition type mixing silicone rubber and addition type silicone rubber, can solve the problems of uncertain vinyl weight ratio or vinyl mole fraction, inability to calculate, etc.

Inactive Publication Date: 2022-05-31
WACKER CHEM GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the unit of the above functional group content is not disclosed, it is not sure whether it is the weight ratio of vinyl or the mole fraction of vinyl, so it cannot be calculated

Method used

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  • A polysiloxane composition
  • A polysiloxane composition
  • A polysiloxane composition

Examples

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Embodiment Construction

[0057] Vinyl silicone raw rubber 1: a methyl vinyl silicone rubber raw rubber, Mw=500 000g / mol, vinyl content 0.013mmol / g,

[0058] Methylsiloxane raw rubber 2: a kind of dimethyl silicone rubber raw rubber, Mw=500 000g / mol, almost no vinyl,

[0059] Tetramethyldivinyldisiloxane: a polyvinylsiloxane with a vinyl content of 26 wt%, 9.6 mmol / g,

[0060] Polyvinyl silicone oil 1, a kind of polyvinyl siloxane, according to DIN 53019-1-2008 at 25 ℃, Brookfield rotational viscometer measurement viscosity is 1080mPa.s, vinyl content 7.8wt%, 2.82mmol / g, Vinyl mole fraction = 20.7%,

[0061] (20.7% vinyl mole fraction is equivalent to about 20.70 methylvinylsiloxane chains per 100 siloxane chains in the copolymer),

[0062] Polyvinyl silicone oil 2, a polyvinylsiloxane with a viscosity of 1000-3000mm measured at 25°C according to DIN 53019-1-2008 2 / s, vinyl content 3.3wt%, 1.15mmol / g, vinyl mole fraction=9.4%,

[0063] (9.4% vinyl mole fraction is equivalent to about 9.4 methyl vi...

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Abstract

The present invention relates to a silicone composition, which contains vinylsiloxane gum, polyvinylsiloxane, silicon dioxide and the like. The composition can be used in the technical field of addition type mixing silicone rubber.

Description

technical field [0001] The invention belongs to the technical field of addition-type silicone rubber, in particular to the technical field of addition-type mixing silicone rubber. Background technique [0002] WO2013137473A discloses a silicone rubber composition for medical tubing. Among them, Table 1 and Table 2 disclose several examples, which contain methyl vinyl raw rubber, hydroxyl-terminated silicone oil, gas silicon, vinyl silicone oil and hydrogen-containing silicone oil, wherein vinyl silicone oil (b2) contains 10wt% vinyl, in the formula The weight ratio of Si-H groups to all vinyl groups in the composition is between 2.0-3.5. The composition was heated at 120°C for 10 minutes to obtain a product with a suitable hardness of about 70. [0003] CN103665885B discloses a high tear-resistant silicone rubber composition, which contains 100 parts of methyl vinyl raw rubber, hydroxyl silicone oil, gas silicon, 4-6 parts of vinyl silicone oil and 3-7 parts of hydrogen-co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L83/07C08L83/05C08K9/00
CPCC08G77/12C08G77/20C08K9/00C08L83/04C08L83/00C08K5/56C08K3/36
Inventor 邓超
Owner WACKER CHEM GMBH
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