A kind of nitrile rubber composition and preparation method

A technology of nitrile-butadiene rubber and a composition, applied in the rubber field, can solve the problems of easy extraction of nitrile-butadiene rubber plasticizer, poor durability, harm to human health and the like

Active Publication Date: 2022-05-24
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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  • A kind of nitrile rubber composition and preparation method
  • A kind of nitrile rubber composition and preparation method
  • A kind of nitrile rubber composition and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] 350g of sebacic acid (SeA), 150g of lactic acid (LA), 300g of succinic acid (SuA), 100g of itaconic acid (IA), 483g of 2,3-butanediol (2,3-BDO), 333g of 1,4-butane Diol (1,4-BDO), 0.17 g of phosphorous acid and 0.67 g of hydroquinone were added to a four-necked flask, nitrogen was introduced, and esterified at 170°C under normal pressure for 4 hours, and then a catalyst, tetrabutyl titanate, was added. 0.83g, heat up to 180°C, remove small molecules in a vacuum state for 1h, cool to room temperature, and obtain a double bond-containing reactive polyester catalyst. Its 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] 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 were sequentially added to an open mill for blending. The Mooney v...

Embodiment 2

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

[0043] 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 were sequentially added to an open mill for blending. The Mooney viscosity was measured, and the tensile properties were measured by the international standard ISO / DIS 3...

Embodiment 3

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

[0046] 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 were sequentially added to an open mill for blending. The Mooney viscosity was measured, and the tensile properties were measur...

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Abstract

The invention discloses a nitrile rubber composition and a preparation method. The nitrile rubber composition is vulcanized by raw materials comprising the following components: each component is calculated in parts by weight, 100 parts by weight of nitrile rubber; 30-70 parts by weight of carbon black; 5 parts by weight of polyester plasticizer 30 parts by weight; vulcanizing agent 0.5-3 parts by weight; the polyester plasticizer is composed of bio-based monomers: itaconic acid, saturated dibasic acid, dibasic alcohol or itaconic acid, saturated dibasic acid, dibasic acid Alcohol, lactic esterification and polycondensation in the system. The invention adopts the green environment-friendly and reactive rubber plasticizer obtained from several bio-based monomers obtained by bio-fermentation through esterification and polycondensation. Improve its processing performance, make the dispersion of carbon black in rubber better, and have efficient plasticizing performance.

Description

technical field [0001] The invention belongs to the technical field of rubber, and particularly relates to a nitrile-butadiene 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 impart softness, elasticity and processing performance to the rubber, and can also improve the cold resistance, oil resistance, and flame resistance of products. . At present, the commonly used plasticizers for nitrile rubber include DOP, DBP and other phthalic acid plasticizers, which have good compatibility with rubber, but have high volatility and poor durability [1]. The plasticizer DOP acts like an artificial hormone in the human body, which can harm male fertility and promote female precocious puberty. Long-term high intake can lead to liver cancer [2]. Since young children are in the developmental stage of the reproductive system of the endo...

Claims

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Application Information

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Patent Type & Authority Patents(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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