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Liquid nitroso fluorine rubber composition for sealing

A technology of nitroso fluororubber and composition, which is applied in the field of organic fluorine materials, can solve the problem that the application of liquid nitroso fluororubber has not been studied in depth, and achieve good vulcanization mechanical properties, good flow properties, and good sealing properties. Effect

Active Publication Date: 2014-08-13
CHINA BLUESTAR CHENGRAND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this patent is limited to the preparation of nitrosofluororubber raw rubber, and there is no in-depth study on the application of liquid nitrosofluororubber

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A liquid nitrosofluororubber composition for sealing, characterized in that: by weight, it comprises the following components: 100 parts of nitrosofluororubber raw rubber, 0.5 part of vulcanizing agent, and 8 parts of reinforcing filler; The intrinsic viscosity of nitrosofluororubber raw rubber is 0.05dLg -1 , its physical form is a liquid form, with flowability at room temperature.

Embodiment 2

[0025] A liquid nitrosofluororubber composition for sealing, characterized in that: by weight, it comprises the following components: 100 parts of nitrosofluororubber raw rubber, 2 parts of organic polyamines, 5 parts of vulcanization aids, reinforcing 15 parts of filler; the intrinsic viscosity of the nitrosofluororubber raw rubber is 0.1dLg -1 , its physical form is a liquid form, with flowability at room temperature.

[0026] The said organic polyamine is in liquid state.

Embodiment 3

[0028] A liquid nitrosofluororubber composition for sealing, characterized in that: by weight, it comprises the following components: 100 parts of nitrosofluororubber raw rubber, 1 part of polyetheramine with a molecular weight of 400, and 2 parts of accelerator, 10 parts of reinforcing fillers; the intrinsic viscosity of the nitrosofluororubber raw rubber is 0.08dLg -1 , its physical form is a liquid form, with flowability at room temperature.

[0029] The low molecular weight polyetheramine is liquid.

[0030] The accelerator is liquid.

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Abstract

The invention provides a liquid nitroso fluorine rubber composition for sealing. The Liquid nitroso fluorine rubber composition for sealing comprises the following components in parts by weight: 100 parts of nitroso fluorine raw rubber, 0.5-2 parts of vulcanizing agent, 0-5 parts of vulcanizing aid and 8-15 parts of reinforced filler. The intrinsic viscosity of the nitroso fluorine raw rubber is 0.05-0.1dLg<-1>, the physical form of the raw rubber is a liquid form, and the raw rubber has room-temperature fluidity. According to the composition disclosed by the invention, the nitroso fluorine rubber polymer which is low in molecular weight and has a room-temperature flowing form is adopted and applied to irregular shape sealing preparation, the sealing property is provided for substrates contacting a strong acid, a strong base, a strong oxidant and other chemical reagent mediums, and the liquid nitroso fluorine rubber composition can be applied to a plurality of fields such as aerospace, chemical engineering, electrons and new energy sources.

Description

technical field [0001] The invention belongs to the technical field of organic fluorine materials, and in particular relates to a liquid nitrosofluororubber composition for sealing. Background technique [0002] Nitroso fluororubber (Nitroso Rubber, NR for short) is a high molecular polymer obtained by low-temperature copolymerization of nitrosotrifluoromethane, tetrafluoroethylene, and vulcanization point (or crosslinking point) monomers. Half of the main chain of NR polymer is a carbon-carbon bond (-C-C-), the other half is a nitrogen-oxygen bond (-N-O-), and the carbon atoms are all connected to fluorine atoms, which has good chemical stability; a large number of main chains The nitrogen-oxygen chain link endows rubber with excellent low-temperature resistance; NR has high fluorine content and does not contain C-H bonds. The gas released during high-temperature cracking can extinguish the flame, so NR will not burn even in pure oxygen; heat resistance Well, the long-term...

Claims

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Application Information

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IPC IPC(8): C08L79/00C08K3/36C08G73/24
CPCC08G73/26C08K3/36C08K5/3412C08L79/00C08L79/02C08L71/00
Inventor 邓清田周楠杨晓勇徐亭吴勇唐培沈佶原华宋升
Owner CHINA BLUESTAR CHENGRAND CO LTD