CN103360646A - High-wear-resistance rubber sealing gasket and preparation method thereof - Google Patents

Abstract

The invention discloses a high-wear-resistance rubber sealing gasket and a preparation method thereof. The high-wear-resistance rubber sealing gasket is prepared from the following raw materials in parts by weight: 50-70 parts of nitrile-butadiene rubber, 20-30 parts of cis-1,4-polybutadiene rubber, 10-15 parts of ABS (acrylonitrile-butadiene-styrene) high rubber powder, 3-5 parts of dibutyl ester of nylon acid, 2-3 parts of tributyl citrate, 4-6 parts of tritolyl phosphate, 1-2 parts of imarcaptoacetate dioctyltin, 1-2 parts of barium stearate, 3-4 parts of zinc oxide, 2-3 parts of magnesium oxide, 10-15 parts of modified barite powder, 5-10 parts of nano silicon carbide, 10-15 parts of high-wear-resistance carbon black N330, 1-2 parts of 2-thiolbenzoimidazole, 2-3 parts of bis-peroxycarbamate, 1-2 parts of anti-aging agent DNP, 1-2 parts of accelerator TMTD and 1-2 parts of accelerator TETD. Tungsten carbide, zirconium fluoride and the like are utilized to inorganically modify barite, thereby obviously enhancing the mechanical strength and wear resistance of the rubber material; and isopropyldistearoyloxy aluminate and the like are utilized to organically modify the barite, thereby enhancing the compatibility of the barite with the rubber material.

Description

A kind of high wear-resistant rubber gasket and preparation method thereof

Technical field

The present invention relates to a kind of gasket, be specifically related to a kind of high wear-resistant rubber gasket and preparation method thereof.

Background technology

Rubber gasket is a kind of for inside such as machinery, equipment, pipelines, and the material that seals is widely used in the fields such as automobile, electronics, chemical industry.The defectives such as existing rubber gasket sealing effectiveness is undesirable, wear resistance is relatively poor, intensity is low far can not satisfy actual requirement.Therefore researching and developing a kind of high wear-resistant rubber gasket has become the task of top priority.

Summary of the invention

The object of the present invention is to provide a kind of high wear-resistant rubber gasket and preparation method thereof, sealing pad sealing property is excellent, and wear resistance is good, and physical strength is high.

The technical solution used in the present invention is as follows:

A kind of high wear-resistant rubber gasket, made by the raw material of following weight part: Paracril (N220S)50-70, Cis-1,4-polybutadiene rubber (BR9000) 20-30, ABS high glue powder 10- 15, nylon acid two isobutylsEster 3-5, LemonLemon acid tri-n-butyl 2-3, tritolyl phosphate 4-6, Imarcaptoacetate dioctyltin 1-2, barium stearate 1-2, zinc oxide 3-4, magnesium oxide 2-3, modified barite powder 10-15, nanometer silicon carbide 5-10 ,High abrasion furnace carbon black N330 10-15,2-thiol group benzimidazolyl 1-2, two peroxide carbamate 2-3, antioxidant D NP 1-2, Vulcanization accelerator TMTD 1-2, acceterator TE TD 1-2.

The preparation method of described modified barite powder is as follows: will be crushed to below the barite 10 μ m, add again and be equivalent to the trees ashes of barite weight 4-8%, the wolfram varbide of 3-6%, the Zirconium tetrafluoride of 2-3%, the polyisobutene of 3-4%, the ferrocene of 4-6%, the calcium lignin sulphonate of 3-5%, in 50-60 ℃ of lower mixed grinding 20-30min, and then spray into the sec.-propyl distearyl acyl-oxygen base Aluminate that is equivalent to barite weight 2-4% and the irgasfos 168 of 1-2%, stir 40-50min under 12000-15000 r/min, oven dry gets final product.

A kind of preparation method of high wear-resistant rubber gasket may further comprise the steps:

(1) will Paracril, Nylon acid two isobutylsEster, LemonLemon acid tri-n-butyl, zinc oxide, modified barite powder, barium stearate get compound A at 50-60 ℃ of lower pre-mixing 10-15min;

(2) with cis-1,4-polybutadiene rubber, ABS high glue powder, nanometer silicon carbide, Imarcaptoacetate dioctyltin, magnesium oxide, tritolyl phosphate at 70-80 ℃ of lower pre-mixing 12-16min, get compound B;

(3) send in the rubber mixing machine after compound A and compound B are mixed, add all the other raw materials at 85-90 ℃ of lower refining glue 15-20min;

(4) after refining glue is finished, the taking-up sizing material is paved, send into and carry out twice sulfuration in the vulcanizing press, the curing temperature of primary vulcanization is controlled at 170-180 ℃, curing time is 6-12min, complete and then the carrying out of primary vulcanization vulcanized the second time, and curing temperature is 210-230 ℃ for the second time, and curing time is 3-5h;

(5) goods that will finish sulfuration take out, and through the passer, can become finished product behind the finishing burr.

Beneficial effect of the present invention:

The present invention adopts the inorganic powders such as wolfram varbide, Zirconium tetrafluoride to carry out inorganic modified to barite, can obviously improve physical strength and the wear resistance of sizing material, recycling sec.-propyl distearyl acyl-oxygen base Aluminate, polyisobutene etc. carry out organically-modified to barite, can improve the consistency of barite and sizing material; The present invention has added the inorganic nano powder such as nanometer silicon carbide, high wear-resistant carbon black by to formula adjustment, can obviously improve wearability and the high thermal resistance of gasket.Gasket sealing property of the present invention is excellent, has good compression resilience, chemical stability, corrosion-resistant, wear resistance, performance and stable storing characteristic and the size retention such as high temperature resistant.

Embodiment

A kind of high wear-resistant rubber gasket, made by the raw material of following weight (kg): Paracril (N220S)60, Cis-1,4-polybutadiene rubber (BR9000) 25, ABS high glue powder 12 , nylon acid two isobutylsEster 4, LemonLemon acid tri-n-butyl 3, tritolyl phosphate 5, Imarcaptoacetate dioctyltin 1.5, barium stearate 2, zinc oxide 3, magnesium oxide 2, modified barite powder 12, nanometer silicon carbide 8 ,High abrasion furnace carbon black N330 15,2-thiol group benzimidazolyl 1.5, two peroxide carbamate 2, antioxidant D NP 2, Vulcanization accelerator TMTD 1, acceterator TE TD 2.

The preparation method of described modified barite powder is as follows: will be crushed to below the barite 10 μ m, add again and be equivalent to the trees ashes of barite weight 5%, 4% wolfram varbide, 3% Zirconium tetrafluoride, 4% polyisobutene, 5% ferrocene, 4% calcium lignin sulphonate, in 55 ℃ of lower mixed grinding 20min, and then spray into the sec.-propyl distearyl acyl-oxygen base Aluminate that is equivalent to barite weight 3% and 1.5% irgasfos 168, stir 40min under 15000 r/min, oven dry gets final product.

A kind of preparation method of high wear-resistant rubber gasket may further comprise the steps:

(1) will Paracril, Nylon acid two isobutylsEster, LemonLemon acid tri-n-butyl, zinc oxide, modified barite powder, barium stearate get compound A at 60 ℃ of lower pre-mixing 10min;

(2) with cis-1,4-polybutadiene rubber, ABS high glue powder, nanometer silicon carbide, Imarcaptoacetate dioctyltin, magnesium oxide, tritolyl phosphate at 80 ℃ of lower pre-mixing 12min, get compound B;

(3) send in the rubber mixing machine after compound A and compound B are mixed, add all the other raw materials at 90 ℃ of lower refining glue 15min;

(4) after refining glue is finished, take out sizing material and pave, send into and carry out twice sulfuration in the vulcanizing press, the curing temperature of primary vulcanization is 180 ℃, and curing time is 8min, and primary vulcanization vulcanizes the second time by complete and then carrying out, curing temperature is 225 ℃ for the second time, and curing time is 4h;

(6) goods that will finish sulfuration take out, and through the passer, can become finished product behind the finishing burr.

Gasket physicals of the present invention is as shown in the table:

Claims (2)

1. high wear-resistant rubber gasket, it is characterized in that, made by the raw material of following weight part: paracril (N220S) 50-70, cis-1,4-polybutadiene rubber (BR9000) 20-30, ABS high glue powder 10-15, diisobutyl ester of nylon acids 3-5, tributyl citrate 2-3, tritolyl phosphate 4-6, Imarcaptoacetate dioctyltin 1-2, barium stearate 1-2, zinc oxide 3-4, magnesium oxide 2-3, modified barite powder 10-15, nanometer silicon carbide 5-10, high abrasion furnace carbon black N330 10-15,2-thiol group benzimidazolyl 1-2, two peroxide carbamate 2-3, antioxidant D NP 1-2, Vulcanization accelerator TMTD 1-2, acceterator TE TD 1-2;

The preparation method of described modified barite powder is as follows: will be crushed to below the barite 10 μ m, add again and be equivalent to the trees ashes of barite weight 4-8%, the wolfram varbide of 3-6%, the Zirconium tetrafluoride of 2-3%, the polyisobutene of 3-4%, the ferrocene of 4-6%, the calcium lignin sulphonate of 3-5%, in 50-60 ℃ of lower mixed grinding 20-30min, and then spray into the sec.-propyl distearyl acyl-oxygen base Aluminate that is equivalent to barite weight 2-4% and the irgasfos 168 of 1-2%, stir 40-50min under 12000-15000 r/min, oven dry gets final product.

2. the preparation method of a high wear-resistant rubber gasket as claimed in claim 1 is characterized in that may further comprise the steps:

(1) with paracril, diisobutyl ester of nylon acids, tributyl citrate, zinc oxide, modified barite powder, barium stearate at 50-60 ℃ of lower pre-mixing 10-15min, get compound A;

(2) with cis-1,4-polybutadiene rubber, ABS high glue powder, nanometer silicon carbide, Imarcaptoacetate dioctyltin, magnesium oxide, tritolyl phosphate at 70-80 ℃ of lower pre-mixing 12-16min, get compound B;

(3) send in the rubber mixing machine after compound A and compound B are mixed, add all the other raw materials at 85-90 ℃ of lower refining glue 15-20min;

(4) after refining glue is finished, the taking-up sizing material is paved, send into and carry out twice sulfuration in the vulcanizing press, the curing temperature of primary vulcanization is controlled at 170-180 ℃, curing time is 6-12min, complete and then the carrying out of primary vulcanization vulcanized the second time, and curing temperature is 210-230 ℃ for the second time, and curing time is 3-5h;

(5) goods that will finish sulfuration take out, and through the passer, can become finished product behind the finishing burr.