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Butadiene-acrylonitrile rubber composition and preparation method thereof

A technology of nitrile rubber and composition, applied in the rubber field, can solve the problems of poor durability, endanger human health, easy extraction of nitrile rubber plasticizer, etc., and achieve the effect of improving extraction resistance and performance improvement.

Active Publication Date: 2020-12-29
BEIJING UNIV OF CHEM TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to solve the problems in the prior art that the nitrile rubber plasticizer is easy to extract, has poor durability and pollutes the environment and endangers human health, the invention provides a nitrile rubber composition and a preparation method

Method used

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  • Butadiene-acrylonitrile rubber composition and preparation method thereof
  • Butadiene-acrylonitrile rubber composition and preparation method thereof
  • Butadiene-acrylonitrile rubber composition and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] 350g sebacic acid (SeA), 150g lactic acid (LA), 300g succinic acid (SuA), 100g itaconic acid (IA), 483g2,3-butanediol (2,3-BDO), 333g1,4-butane Diol (1,4-BDO), 0.17g of phosphorous acid and 0.67g of hydroquinone were added to a four-necked flask, nitrogen was introduced, esterified at 170°C for 4 hours under normal pressure, and then catalyst tetrabutyl titanate was added 0.83g, heated up to 180°C, desorbed small molecules in a vacuum state for 1h, cooled to room temperature, and obtained a reactive polyester catalyst containing double bonds. The molecular weight is 1110, and the double bond content in the unit molecule of the prepared reactive polyester catalyst is 0.66. The sources of raw materials are all commercially available.

[0040] Add 100 parts of nitrile rubber (N230), 50 parts of carbon black (N330), 20 parts of polyester plasticizer, and 1.5 parts of vulcanizing agent DCP to the mixer in order to blend. Measure its Mooney viscosity, and use the internatio...

Embodiment 2

[0042]With 67g sebacic acid (SeA), 150g succinic acid (SuA), 100g itaconic acid (IA), 315g2,3-butanediol (2,3-BDO), 170g1,3-propanediol (1,3- PDO), 300g of lactic acid (LA) trimethyl phosphate 0.9g and hydroquinone 0.10g were added in a four-necked flask, fed with nitrogen, esterified at 160°C for 3 hours under normal pressure, and then added catalyst tetrabutyl titanate 0.83g, heated up to 210°C, released small molecules under vacuum for 4 hours, cooled to room temperature, and obtained a reactive polyester catalyst with a molecular weight of 1774 and containing double bonds. The prepared reactive polyester catalyst has a double bond content of 1.09 per unit molecule.

[0043] Add 100 parts of nitrile rubber (N230), 50 parts of carbon black (N330), 20 parts of polyester plasticizer, and 1.5 parts of vulcanizing agent DCP to the mixer in order to blend. Measure its Mooney viscosity, and use the international standard ISO / DIS 37-1990 to measure its tensile properties after vul...

Embodiment 3

[0045] With 483g sebacic acid (SeA), 300g succinic acid (SuA), 100g itaconic acid (IA), 483g2,3-butanediol (2,3-BDO), 333g1,4-butanediol (1, 4-BDO), 0.80 g of trimethyl phosphate and 0.20 g of hydroquinone were added into a four-necked flask, and nitrogen was fed into it, and esterified at 150 °C for 2 hours at normal pressure, then 1.5 g of catalyst antimony acetate was added, and the temperature was raised to 230 °C, remove small molecules under vacuum for 6 hours, cool to room temperature, and obtain a reactive polyester catalyst with a molecular weight of 2909 and containing double bonds. The prepared reactive polyester catalyst has a double bond content of 1.72 per unit molecule.

[0046] Add 100 parts of nitrile rubber (N230), 50 parts of carbon black (N330), 20 parts of polyester plasticizer, and 1.5 parts of vulcanizing agent DCP to the mixer in order to blend. Measure its Mooney viscosity, and use the international standard ISO / DIS 37-1990 to measure its tensile prop...

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Abstract

The invention discloses a butadiene-acrylonitrile rubber composition and a preparation method thereof. The butadiene-acrylonitrile rubber composition is prepared by vulcanizing the following raw materials in parts by weight: 100 parts of butadiene-acrylonitrile rubber, 30-70 parts by weight of carbon black, 5-30 parts by weight of a polyester plasticizer, and 0.5-3 part by weight of a vulcanizingagent, wherein the polyester plasticizer is prepared from bio-based monomers including itaconic acid, saturated binary acid and dihydric alcohol or itaconic acid, saturated binary acid, dihydric alcohol and lactic acid through esterification polycondensation. The environment-friendly reactive rubber plasticizer is obtained by esterification and polycondensation of a plurality of bio-based monomersobtained by biological fermentation. The processability is improved, so that the dispersing performance of the carbon black in the rubber becomes better, and the efficient plasticizing performance isachieved.

Description

technical field [0001] The invention belongs to the technical field of rubber, in particular to a nitrile rubber composition and a preparation method. Background technique [0002] At present, synthetic plasticizers are generally used in highly polar rubbers such as nitrile rubber. Synthetic plasticizers can endow the rubber with softness, elasticity and processing properties, and can also improve the cold resistance, oil resistance, and flame resistance of the product. . At present, commonly used plasticizers for nitrile rubber include phthalic acid plasticizers such as DOP and DBP, which have good compatibility with rubber, but are highly volatile and poor in durability [1]. The role of the plasticizer DOP in the human body is similar to that of artificial hormones, which can harm male fertility and promote precocious puberty in women. Long-term intake of large amounts can lead to liver cancer [2]. Since young children are in the developmental period of the endocrine sys...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L9/02C08L67/06C08K3/04C08G63/52C08G63/60C08G63/85C08G63/86
CPCC08L9/02C08G63/52C08G63/60C08G63/85C08G63/866C08L67/06C08K3/04
Inventor 王朝何勇张立群张奇男叶能张宁董栋
Owner BEIJING UNIV OF CHEM TECH
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