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Heat-resisting silicone oil composite

A technology of silicone oil compound and compound, which is applied in the field of high-temperature resistant silicone oil, can solve the problems of inability to inhibit thermal degradation of silicone oil and thermal weight loss of silicone oil, and achieve the effects of reducing thermal degradation damage, reducing thermal weight loss, and reducing degradation

Active Publication Date: 2011-10-19
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the destruction reaction of silicone oil under hot air conditions, in addition to the thermal oxidation crosslinking destruction reaction, thermal degradation reaction also occurs at the same time, which causes depolymerization, fracture and rearrangement of molecular chains, thus causing thermal weight loss of silicone oil.
However, the known metallocene additives used to improve the thermal stability of silicone oil in an air atmosphere cannot inhibit the thermal degradation of silicone oil.

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0023] Embodiment 1, preparation and heat resistance test of silicone oil / ferrocenyl silazane compound

[0024] Take by weighing 100 parts (mass parts) of methyl silicone oil (η 25 1000mPa·S), 0.001 parts (parts by mass) of 1,1,3,3-tetramethyl-1,3-diferrocenylsilazane, mixed uniformly on a three-roll mill at room temperature to obtain Silicone oil / ferrocenylsilazane complex.

[0025] Take 50g of the compound prepared above and place it in a 150ml beaker, place it in an air circulation aging box, keep the temperature at 300°C, measure the weight loss when the aging time is 24h is 4.9%, and the gel time of methyl silicone oil is more than 1000 hours.

Embodiment 2

[0026] Example 2, Preparation and heat resistance test of silicone oil / ruthenocene-based silazane complex

[0027] Take by weighing 100 parts (mass parts) of methyl silicone oil (η 25 20mPa·S), 2.5 parts (parts by mass) of 1,1,3,3-tetraphenyl-1,3-diruthenocene-based silazane, stirred evenly at room temperature to obtain silicone oil / ruthenocene-based silicon Azane complex.

[0028] Take 50g of the compound prepared above and place it in a 150ml beaker, place it in an air circulation aging box, keep the temperature at 300°C, measure the weight loss when the aging time is 24h is 3.6%, and the gel time of methyl silicone oil is more than 1000 hours.

Embodiment 3

[0029] Embodiment 3, preparation and heat resistance test of silicone oil / ferrocenyl silazane compound

[0030] Take by weighing 100 parts (mass parts) of methyl silicone oil (η 25 5000mPa·S), 5 parts (parts by mass) of 1,3-dimethyl-1,3-diphenyl-1,3-diferrocenylsilazane, added to a vacuum kneader at 150°C / - Banbury mixing at 0.1Mpa, and silicone oil / ferrocenylsilazane compound can be obtained after cooling.

[0031] Take 50g of the above-prepared silicone oil / ferrocenylsilazane compound and place it in a 150ml beaker, place it in an air circulation aging box, keep the temperature at 300°C, and measure the weight loss when the aging time is 24h to be 3%. The gel time of silicone oil is more than 1000 hours.

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Abstract

The invention discloses a heat-resisting silicone oil composite comprising silicone oil and metallocene base silazane which is shown as a formula (1); the mass fraction ratio of the silicone oil and the metallocene base silazane shown as the formula (1) is 100:(0.001 to 5); in the formula (1), M is selected from Fe and Ru; and R1, R2, R3 and R4 are all selected from methyl, ethyl, propyl, butyl, octyl, methoxyl, ethyoxyl, ethylene, phenyl, tolyl, chlorphenyl and naphthyl. In the heat-resisting silicone oil composite, the heat-resisting oxidizability of the silicone oil is improved, thermal degradation damage of a molecular chain is reduced, heat weightlessness of the silicone oil is reduced, and the silicone oil has better heat-resisting comprehensive performance.

Description

technical field [0001] The invention relates to a heat-resistant silicone oil compound, which belongs to the technical field of high-temperature resistant silicone oil. Background technique [0002] Silicone oil will undergo obvious oxidation when the temperature exceeds 250°C in the air atmosphere, causing cross-linking reactions between molecular chains, so that the silicone oil gels. For example, at 300°C, the gel time of methyl silicone oil is generally not more than 10 hours. In the prior art, adding metallocene compounds such as ferrocene, ruthenium and other soluble metal compounds and their derivatives can increase the heat-resistant temperature and gel time of silicone oil. [0003] US 2,979,482 describes the use of ferrocene and its small molecule derivatives as silicone oil additives to delay the thermal oxidation process of silicone oil and prolong the gel time of silicone oil in an air atmosphere at 250°C. However, in the destruction reaction of silicone oil un...

Claims

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Application Information

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IPC IPC(8): C08L83/04C08K5/56C09K5/10
Inventor 刘玉鹏张志杰李宗起谭永霞
Owner INST OF CHEM CHINESE ACAD OF SCI
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