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Low-permeability fluororubber product material

A fluororubber and low-permeability technology, which is applied in the field of fluororubber product materials and low-permeability fluororubber product materials, can solve the problems of poor workmanship, low product qualification rate, high material cost, etc., achieve good methanol and ethanol fuel performance, improve Good mold release performance and compressive stress relaxation

Pending Publication Date: 2021-05-28
NINGGUO RUIPUSLS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the unsatisfaction of domestic ternary fluorine rubber with high fluorine content; the use of domestic polyfluororubber rubber with high fluorine content has poor manufacturability and low product qualification rate; imported ternary fluorine rubber can be used To meet the fuel permeability requirements, but the material cost is twice as high as that of domestic products, and a low-permeability fluororubber product material is proposed

Method used

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  • Low-permeability fluororubber product material

Examples

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Effect test

Embodiment 1

[0029] A low-permeability fluororubber product material, including the following raw materials in parts by weight: 84 parts of fluororubber, 4 parts of calcium silicate, 1.5 parts of magnesium oxide, 4 parts of calcium hydroxide, 0.3 parts of WS280, 0.3 parts of iron oxide red, modified 8 parts of molybdenum disulfide, 12 parts of nano inorganic filler, 2 parts of modified diatomite, 2 parts of modified white carbon black;

[0030] The preparation process of the low-permeability fluororubber product material comprises the following steps:

[0031] The first step: the preparation of synthetic rubber: send all the raw materials into the internal mixer according to the above weight parts, and detect the hardness, strength and elongation after obtaining the synthetic rubber through the internal mixer, and filter after detection, wherein, Synthetic rubber with a hardness of 65 degrees, strength ≥ 10MPa, and elongation ≥ 175% is qualified synthetic rubber;

[0032] The second step:...

Embodiment 2

[0046] A low-permeability fluororubber product material, comprising the following raw materials in parts by weight: 85 parts of fluororubber, 5 parts of calcium silicate, 1.8 parts of magnesium oxide, 5 parts of calcium hydroxide, 0.4 parts of WS280, 0.4 parts of iron oxide red, modified 9 parts of molybdenum disulfide, 13 parts of nano inorganic filler, 3 parts of modified diatomite, 3 parts of modified white carbon black;

[0047] The preparation process of the low-permeability fluororubber product material comprises the following steps:

[0048] The first step: the preparation of synthetic rubber: send all the raw materials into the internal mixer according to the above weight parts, and detect the hardness, strength and elongation after obtaining the synthetic rubber through the internal mixer, and filter after detection, wherein, Synthetic rubber with a hardness of 68 degrees, a strength ≥ 10 MPa, and an elongation ≥ 175% is a qualified synthetic rubber;

[0049] The sec...

Embodiment 3

[0063] A low-permeability fluororubber product material, comprising the following raw materials in parts by weight: 87 parts of fluororubber, 5 parts of calcium silicate, 2.0 parts of magnesium oxide, 5 parts of calcium hydroxide, 0.5 part of WS280, 0.5 part of iron oxide red, modified 10 parts of molybdenum disulfide, 16 parts of nano inorganic filler, 3 parts of modified diatomite, 3 parts of modified white carbon black;

[0064] The preparation process of the low-permeability fluororubber product material comprises the following steps:

[0065] The first step: the preparation of synthetic rubber: send all the raw materials into the internal mixer according to the above weight parts, and detect the hardness, strength and elongation after obtaining the synthetic rubber through the internal mixer, and filter after detection, wherein, Synthetic rubber with a hardness of 70 degrees, strength ≥ 10MPa, and elongation ≥ 175% is qualified synthetic rubber;

[0066] The second step:...

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Abstract

The invention discloses a low-permeability fluororubber product material which comprises the following raw materials in parts by weight: fluororubber, calcium silicate, magnesium oxide, calcium hydroxide, WS280, iron oxide red, modified molybdenum disulfide, nano inorganic filler, modified diatomite and modified white carbon black. Preparation of synthetic rubber comprises steps of feeding all the raw materials into an internal mixer according to the weight parts, detecting the hardness, strength and elongation of the synthetic rubber after the synthetic rubber is obtained through the internal mixer, and filtering after detection, carrying out open milling molding on the qualified synthetic rubber through an open mill at 60-70 DEG C, putting the molded rubber into a mold in vulcanization equipment, and carrying out vulcanization treatment on the rubber. The low-permeability fluororubber product material which is excellent in flowability, improved in demolding performance, relatively good in methanol and ethanol fuel oil resistance and good in compression stress relaxation is prepared through the procedures of preparation of synthetic rubber, molding and vulcanization of the rubber, secondary vulcanization aftertreatment and the like.

Description

technical field [0001] The invention belongs to the technical field of fluororubber and relates to a fluororubber product material, in particular to a low-permeability fluororubber product material. Background technique [0002] Viton is a rubber known for its resistance to alcohol-based fuel oil. With the needs of social development, the "National VI" standard will strictly control the emission limits of pollutants. The two-day emission limit requirement for evaporative emissions has been reduced from 2 grams in the original "National V" to 0.65 grams. To below 40g*mm / m2*day. Domestic ternary fluorine rubber with high fluorine content cannot meet the requirements; domestic fluorine rubber with high fluorine content has poor processability and low product qualification rate; imported ternary fluorine rubber can meet the requirements of fuel permeability, but the material The cost is twice as high as that of domestic products. The invention proposes to obtain a low-permeab...

Claims

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Application Information

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IPC IPC(8): C08L27/12C08K13/06C08K9/04C08K3/30C08K9/06C08K7/26C08K3/22C08K3/04
CPCC08K13/06C08K9/04C08K3/30C08K9/06C08K7/26C08K3/22C08K3/041C08K2003/3009C08K2201/014C08K2003/2241C08K2003/3045C08K2201/011C08L27/12
Inventor 方勇晏光福
Owner NINGGUO RUIPUSLS
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