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Method for preparing half-crosslinked powdered butadiene-acrylonitrile rubber

A technology of powdered nitrile rubber and nitrile rubber, which is applied in the field of rubber polymer science, can solve problems such as large environmental impact, environmental impact, and complex production, and achieve the effect of less investment, simple method, and improved elasticity

Inactive Publication Date: 2012-03-28
NINGBO UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process is complicated to produce, the process is long, the investment is huge, and a large amount of water is required for washing in the process of powdering, and the unreacted toxic monomer acrylonitrile has a great impact on the environment
So this kind of production will have a great impact on the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 3000g of acrylonitrile content is 35%, Mooney is 65 bulk nitrile rubber, 40g of BPO, 150g of trimethylolpropane trimethacrylate, 25g of Antioxidant is 3,5-di-tert-butyl-4-hydroxybenzyl diethyl phosphate and N-cyclohexyl-p-methoxyaniline (mass ratio is 1: 1), 12.5g of sodium borohydride and 200g calcium carbonate. Heat and turn on the internal mixer, the internal mixer speed is controlled at 500 rpm, and the internal mixer heating temperature is set at 80°C. After a reaction time of 0.5 hour, cool to 40°C and discharge to obtain a semi-crosslinked nitrile rubber. Then the semi-crosslinked nitrile rubber obtained is put into the rubber pulverizer equipped with liquid nitrogen cooling system and pulverized, and the order number of pulverized rubber granules is 30 orders, and the semi-crosslinked powdered nitrile rubber is obtained, and its gel content It is 27.1%, Mooney viscosity is 80.

Embodiment 2

[0024] The acrylonitrile content of 3000g is 35%, Mooney is 65 block nitrile rubber, 40g of 3,5,5-trimethyl-hexanoic acid tert-butyl ester, 150g in the banbury mixer that is loaded with 5L in volume The antioxidant of trimethylolpropane trimethacrylate, 25g is 3,5-di-tert-butyl-4-hydroxybenzyl phosphate diethyl ester and N-cyclohexyl-p-methoxyaniline (mass ratio 1:1), 12.5g of sodium borohydride and 200g of calcium carbonate. Heat and turn on the internal mixer, the internal mixer speed is controlled at 500 rpm, and the internal mixer heating temperature is set at 150°C. After a reaction time of 1 hour, cool to 40°C and discharge to obtain a semi-crosslinked nitrile rubber. Then the obtained semi-crosslinked nitrile rubber is put into a rubber pulverizer equipped with a liquid nitrogen cooling system to pulverize, and the mesh number of the pulverized rubber particles is 30 orders to obtain semi-crosslinked powdered nitrile rubber. It has a gel content of 34% and a Mooney vi...

Embodiment 3

[0026] The acrylonitrile content of loading 3000g is 41% in the banbury mixer that volume is 5L, Mooney is 70 bulk nitrile rubber, 30g 3,5,5-trimethyl-hexanoic acid tert-butyl ester, 150g The antioxidant of trimethylolpropane trimethacrylate, 25g is 3,5-di-tert-butyl-4-hydroxybenzyl phosphate diethyl ester and N-cyclohexyl-p-methoxyaniline (mass ratio 1:1), 12.5g of sodium borohydride and 200g of calcium carbonate. Heat and turn on the internal mixer, the internal mixer speed is controlled at 500 rpm, and the internal mixer heating temperature is set at 150°C. After a reaction time of 1 hour, cool to 40°C and discharge to obtain a semi-crosslinked nitrile rubber. Then the obtained semi-crosslinked nitrile rubber is put into a rubber pulverizer equipped with a liquid nitrogen cooling system to pulverize, and the mesh number of the pulverized rubber particles is 30 orders to obtain semi-crosslinked powdered nitrile rubber. It has a gel content of 29% and a Mooney viscosity of ...

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Abstract

The invention provides a method for preparing half-crosslinked powdered butadiene-acrylonitrile rubber, which belongs to the field of rubber polymer science. The method prepares half-crosslinked powdered butadiene-acrylonitrile rubber by a two-step process. The first step is to put blocky butadiene-acrylonitrile rubber, a starter, an aid crosslinking agent, an anti-aging agent, an anti-yellowing agent and a parting agent into an internal mixer, control the reaction temperature and the speed of a rotor of the internal mixer, react for a certain time period, cool and discharge to obtain half-crosslinked butadiene-acrylonitrile rubber. The second step is to grind the half-crosslinked butadiene-acrylonitrile rubber with a rubber grinder with a liquid nitrogen cooling system to obtain half-crosslinked butadiene-acrylonitrile rubber. The prepared half-crosslinked butadiene-acrylonitrile rubber can be widely used as a toughness modifier for polymers such as polyvinyl chloride for sealing workpieces, shoe material and the like to improve the elasticity, toughness, oil resistance and cold resistance of composite materials. The method disclosed by the method is simple, environment-friendly, favorable for large-scale production and capable of making product quality controllable and product performance stable, and thus has a wide application prospect.

Description

technical field [0001] The invention relates to a preparation method of semi-crosslinked powdered nitrile rubber, which belongs to the field of rubber polymer science. The semi-crosslinked powdered nitrile rubber prepared by the invention is used as a polymer toughness modifier such as PVC, and is widely used in sealing parts, shoe materials, etc., and can improve the elasticity, toughness, oil resistance and cold resistance of composite materials. Background technique [0002] Nitrile rubber is a copolymer obtained by polymerization of butadiene and acrylonitrile monomers, referred to as nitrile rubber (NBR). As a synthetic rubber with practical value, nitrile rubber is widely used in various fields due to its oil resistance, mechanical properties and chemical corrosion resistance, and has become the most representative oil-resistant rubber. In addition to being used to make products such as hoses, gaskets and oil seals that are in contact with oil or fuel oil, it also inv...

Claims

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Application Information

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IPC IPC(8): C08L9/02C08K13/02B29B7/02B29B7/28B29B9/02C08L27/06
Inventor 段景宽蒋岚李亚邵双喜单志华
Owner NINGBO UNIVERSITY OF TECHNOLOGY
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