Vinyl blocked poly(trifluoropropyl)methylsiloxane fluororubber compatibilizer and preparation method thereof

A technology of polymethyltrifluoropropylsiloxane and vinyl end capping, which is applied in the field of rubber materials, can solve problems that have not been reported, and achieve the effects of good compatibility, improved tensile strength, and obvious compatibilization effect

Inactive Publication Date: 2015-04-22
NO 53 RES INST OF CHINA NORTH IND GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] There is no report about fluororubber-vinyl-terminated polymethyltri...

Method used

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Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0023] In conjunction with the examples below, the technical solutions involved in the present invention are compared with fluororubber / fluorosilicone rubber (with a tensile strength of 7.1MPa, an elongation of 205%, and a Shore A hardness of 63 degrees) without adding a compatibilizer. Further description and compatibilization effect, but not as a limitation on the content of the invention.

[0024] What is not specifically stated in the examples are all parts by mass.

[0025] Embodiment one

[0026] Add 100 parts of fluororubber FE2602 raw rubber, 3 parts of vinyl-terminated polymethyltrifluoropropylsiloxane (molecular weight: 2000), 0.5 part of benzoyl peroxide, and 0.2 part of triallyl isocyanurate Mix evenly in an internal mixer, and react for 10 minutes at a temperature of 110° C. and a rotational speed of 30 r / min to obtain fluororubber-grafted vinyl-terminated polymethyltrifluoropropylsiloxane.

[0027] The tensile strength of the fluororubber / fluorosilicone rubber ...

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PUM

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Abstract

The invention belongs to the technical field of rubber materials. By introducing vinyl blocked poly(trifluoropropyl)methylsiloxane on a main chain of fluororubber, the purpose of improving the compatibility of blend of fluororubber and fluorinated silicone rubber is realized by means of the characteristic that vinyl blocked poly(trifluoropropyl)methylsiloxane is compatible with fluororubber and fluorinated silicone rubber. Meanwhile, crosslinking reaction is carried out on unreacted vinyl and fluorinated silicone rubber, so that reactive compatibilization is realized. The invention relates to a fluororubber-vinyl blocked poly(trifluoropropyl)methylsiloxane compatibilizer which at least comprises the following materials in parts by weight: 100 parts of fluororubber, 3-15 parts of vinyl blocked poly(trifluoropropyl)methylsiloxane, 0.5-2 parts of an initiator and 0.2-1.5 parts of an accelerant. The fluororubber-vinyl blocked poly(trifluoropropyl)methylsiloxane compatibilizer prepared by using a high-temperature mechanochemical grafting method has good compatibility with fluororubber and fluorinated silicone rubber, so that the compatibilization effect is obvious and stable.

Description

technical field [0001] The invention belongs to the technical field of rubber materials, and relates to a fluorine / fluorine silicone rubber blend modification technology, in particular to a fluorine / fluorine silicone rubber compatibilization technology. Background technique [0002] Fluorine rubber has excellent heat resistance, ozone resistance, oil resistance, chemical corrosion resistance and air permeability resistance. It can be widely used in aerospace, army equipment, civilian automobile manufacturing and other industries. However, due to the fluorine atoms contained in the molecular chain of fluororubber, the rigidity of the molecular chain makes fluororubber poor in low temperature resistance, which seriously restricts the scope of use of fluororubber materials. [0003] The main chain of fluorosilicone rubber is -Si-O-, the molecular chain is flexible, the key energy of the main chain is high, and it has excellent high and low temperature resistance. The side chai...

Claims

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Application Information

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IPC IPC(8): C08L87/00C08G81/02C08L27/12C08L83/08
Inventor 杜明欣杜华太张志刚张春梅崔俞宫志欣邹德广庞明磊张斌
Owner NO 53 RES INST OF CHINA NORTH IND GRP
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