Composition of nitrile rubber and polyformaldehyde and preparation method thereof

A technology of nitrile rubber and polyoxymethylene, which is applied in the field of the composition of nitrile rubber and polyoxymethylene and its preparation, can solve the problems of lack of rubber, scorch of rubber, and no processing performance of the composition, so as to improve wear resistance , Eliminate product pad height, eliminate the effect of sticking roller phenomenon

Active Publication Date: 2008-04-30
GUANGZHOU MECHANICAL ENG RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] An article titled Research on Nitrile Rubber/Polyoxymethylene (POM) Blends was published in Special Rubber Products Vol.25, No.3 in June 2004 and in Polymer Materials Science and Engineering in July 2000 Vol.16, No.4 in an article titled Polyamide/Polyoxymethylene/Nitrile Rubber Ternary Blend Elastomer Research article discusses the physical properties of nitrile rubber and polyoxymethylene blended, its shortcomings The difference is that the two articles did not involve the processing performance of the composition, nor did the

Method used

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  • Composition of nitrile rubber and polyformaldehyde and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Preparation of polyoxymethylene masterbatch

[0030] Prepare materials according to the following formula (parts by weight): 300 parts of Perbunan NT 3480 (German Lanxess nitrile rubber, 34% ACN content, ML1+4 is 80 at 100°C), M90-44 (polyoxymethylene copolymer of Japan Polyplastics) 100 2 parts, 2 parts of dicyandiamide, 4 parts of anti-aging agent RD, 4 parts of paraffin.

[0031] First, add anti-aging agent, NBR, and dicyandiamide into the normal temperature open mill and mix evenly at about 60°C for later use; then raise the temperature of the high temperature open mill to 175°C, with a roll distance of 1mm, add POM, paraffin wax, and fully plasticize Evenly, adjust the roll distance to 3mm, add the nitrile rubber containing anti-aging agent that is uniformly mixed, mix evenly at 175°C, adjust the roll distance to 0.5mm, and then pass it thinly for 3 times, and then cool the sheet to obtain polyoxymethylene Masterbatch.

[0032] (2) Preparation of the composit...

Embodiment 2

[0037] (1) Preparation of polyoxymethylene masterbatch

[0038]Prepare raw materials (parts by weight) according to the following formula: 300 parts of N230SH (Japan JSR company, 35% ACN content, ML1+4 is 85 at 100 DEG C), 100 parts of Delrin 100 (U.S. DuPont homopolyoxymethylene), 3 dicyandiamide 6 parts, 6 parts of anti-aging agent RD, 3 parts of paraffin.

[0039] First, add anti-aging agent, NBR, and dicyandiamide into the normal temperature open mill and mix evenly at about 60°C for later use; then raise the temperature of the high temperature open mill to 180°C, the roller distance is 2mm, add POM, paraffin wax, and fully plasticize Evenly, adjust the roll distance to 5mm, add the above-mentioned nitrile rubber containing anti-aging agent that is uniformly mixed, mix evenly at 180°C, adjust to 1.5mm roll distance, and then thin pass 6 times, and the sheet is cooled to obtain polyoxymethylene Masterbatch.

[0040] (2) preparation of the composition of nitrile rubber and...

Embodiment 3

[0045] The present embodiment is the same as Example 1 except the following features: the preparation of polyoxymethylene masterbatch is prepared according to the following formula (parts by weight): Nipol N-31 (Nipol N-31 (Nipol NBR of Zeon Corporation of Japan, 33% ACN content, at 100° C. ML1+4 is 78) 300 parts, M90-44 (polyoxymethylene copolymer) 100 parts, dicyandiamide 4 parts, anti-aging agent RD 8 parts, paraffin wax 2 parts; the composition of nitrile rubber and polyoxymethylene The preparation is prepared according to the following formula (parts by weight): 27 parts of Perbunan NT 3430 (nitrile rubber from Lanxess Corporation of Germany, 34% ACN content, ML1+4 is 30 at 100°C), 100 parts of POM masterbatch, 3 parts of zinc oxide , 0.5 parts of stearic acid, 1 part of anti-aging agent MB, 55 parts of N330 carbon black, 15 parts of oligoester, 3 parts of dicumyl peroxide, 4 parts of accelerator DTDM, 2.5 parts of accelerator DM, 0.5 parts of accelerator CBS , 0.3 parts ...

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Abstract

The invention relates to composition of nitrile rubber and metaformaldehyde. The invention consists of the raw material with the following parts by weight: 25 to 55 parts of nitrile rubber, 60 to 100 parts of metaformaldehyde master batch, 3 to 5 parts of zinc oxide, 0.5 to 1.5 parts of stearic acid, 0.5 to 1 part of antiaging agent, 50 to 75 parts of black carbon, 8 to 15 parts of plasticizer, 2 to 3 parts of dicumyl peroxide, 2 to 4 parts of 4, 4(1)-dithiodimorpholine, 1.5 to 2.5 parts of dibenzothiazole disulfide, 0.5 to 2 parts of N-cyclohexyl-2-benzothiazolesulfonamide, and 0.2 to 0.3 parts of sulphur. The invention includes the preparation method that the metaformaldehyde master batch is firstly prepared, the raw material with the parts by weight is added into a rubber refining machine to be mixed to be even, and then the composition of the nitrile rubber and the metaformaldehyde is obtained. The composition of the nitrile rubber and the metaformaldehyde eliminates the imperfect status in the process of mixing, extrudion, mould pressing and sulfuration, enhances the wear-resistant, pressure-proof and endurance qualities of the material, and is applicable for preparing the rubber seal material of a Y-shaped seal ring, a dust ring and other rubber seal products.

Description

technical field [0001] The invention belongs to the field of rubber preparation, in particular to a composition of nitrile rubber and polyoxymethylene and a preparation method thereof. Background technique [0002] Nitrile rubber (NBR) is an amorphous polar rubber with excellent oil resistance and is widely used in seals. Polyoxymethylene (POM) has the advantages of smooth surface, small water absorption, stable size, high crystallinity, wear resistance, high strength, good self-lubrication, oil resistance, peroxide resistance, and its tensile strength, bending strength, fatigue resistance Strength, wear resistance and electrical properties are very good. Polyoxymethylene (POM) is blended with NBR, and NBR is modified by using the properties of engineering plastic POM, such as wear resistance, dynamic fatigue resistance, and high crystallinity, so as to obtain a seal with long life, pressure resistance, and wear resistance. Material. [0003] An article titled Research on...

Claims

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Application Information

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IPC IPC(8): C08L59/02C08L9/02C08K5/47C08J3/20C08K5/09C08K3/04C08K5/14
Inventor 肖风亮黄兴雷志云林成志
Owner GUANGZHOU MECHANICAL ENG RES INST
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