Ozone aging resistant carboxyl-terminated telechelic liquid rubber preparation method

A technology of ozone aging-resistant liquid rubber, which is applied in the field of preparation of ozone-resistant carboxyl-terminated telechelic liquid rubber, which can solve the problems of aging resistance decline, anti-aging agent volatilization and migration, etc.

Pending Publication Date: 2021-03-23
天元(杭州)新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the embodiments of the present invention is to provide a method for preparing ozone aging-resistant carboxyl-terminated telechelic liquid rubber, so as to solve the aging resistance caused by the volatilization and migration of the anti-aging agent in the traditional physical blending liquid rubber added with anti-aging agent in the related art The problem of slow performance

Method used

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  • Ozone aging resistant carboxyl-terminated telechelic liquid rubber preparation method
  • Ozone aging resistant carboxyl-terminated telechelic liquid rubber preparation method
  • Ozone aging resistant carboxyl-terminated telechelic liquid rubber preparation method

Examples

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Embodiment 1

[0028] Add glutaric acid peroxide and absolute ethanol into the preparation tank to configure the initiator according to the mass ratio of 1:7, and stir after adding until the glutaric acid peroxide is completely dissolved in absolute ethanol to obtain glutaric acid peroxide without Water ethanol solution (being initiator);

[0029] Add 9.88Kg of butadiene, 0.12Kg of N-(4-anilinophenyl)methacrylamide and 13Kg of absolute ethanol solution of glutaric acid peroxide into a 50L pressure-resistant polymerization kettle, the reaction temperature is 110°C, and the reaction time is 4 Hour. After the polymerization is completed, the polymerization solution is settled, washed and dried to obtain the product. Among them, glutaric acid peroxide absolute ethanol solution is added continuously at a uniform speed, and N-(4-anilinophenyl)methacrylamide is added at one time.

[0030] The absolute ethanol in this embodiment can be replaced by any one or any mixture of two or more of methanol,...

Embodiment 2

[0033] Add glutaric acid peroxide and absolute ethanol into the preparation tank to configure the initiator according to the mass ratio of 1:7, and stir after adding until the glutaric acid peroxide is completely dissolved in absolute ethanol to obtain glutaric acid peroxide without Water ethanol solution (being initiator);

[0034] Add butadiene, acrylonitrile total 9.88Kg (proportion butadiene / acrylonitrile=9.0 / 0.88), N-(4-anilinophenyl) methacrylamide 0.12Kg and Oxyglutaric acid absolute ethanol solution 13Kg, reaction temperature 110°C, reaction time 4 hours. After the polymerization is completed, the polymerization solution is settled, washed and dried to obtain the product. Among them, glutaric acid peroxide absolute ethanol solution is added continuously at a uniform speed, and N-(4-anilinophenyl)methacrylamide is added at one time.

[0035]The absolute ethanol in this embodiment can be replaced by any one or any mixture of two or more of methanol, n-propanol, isoprop...

Embodiment 3

[0038] Add glutaric acid peroxide and absolute ethanol into the preparation tank to configure the initiator according to the mass ratio of 1:7, and stir after adding until the glutaric acid peroxide is completely dissolved in absolute ethanol to obtain glutaric acid peroxide without Water ethanol solution (being initiator);

[0039] Add butadiene, acrylonitrile total 9.88Kg (proportion butadiene / acrylonitrile=8.5 / 1.38), N-(4-anilinophenyl) methacrylamide 0.12Kg and Oxyglutaric acid absolute ethanol solution 13Kg, reaction temperature 110°C, reaction time 4 hours. After the polymerization is completed, the polymerization solution is settled, washed and dried to obtain the product. Among them, glutaric acid peroxide absolute ethanol solution is added continuously at a uniform speed, and N-(4-anilinophenyl)methacrylamide is added at one time.

[0040] The absolute ethanol in this embodiment can be replaced by any one or any mixture of two or more of methanol, n-propanol, isopro...

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Abstract

The invention discloses an ozone aging resistant carboxyl-terminated telechelic liquid rubber preparation method, which is characterized by comprising the steps of adding a diacid peroxide or diacid azodiisobutyronitrile and a polar solvent into a preparation tank according to a mass ratio of 1: (5-10) to prepare an initiator, and stirring until the diacid peroxide or the diacid azodiisobutyronitrile is completely dissolved, adding a polymerization monomer, a reaction type anti-aging agent and the initiator into a reactor according to a mass ratio of (9.99-9.6): (0.01-0.4): (7-16), removing anupper-layer solvent from a polymerization solution through sedimentation and layering, washing with water, and drying to obtain a carboxyl-terminated telechelic oligomer. The polymerization monomer is butadiene, or the polymerization monomer is formed by mixing butadiene and acrylonitrile. Compared with CTPB and CTBN added with an anti-aging agent in a traditional physical blending manner, the CTPB and CTBN of which the molecular chains are combined with the reaction type anti-aging agent have the advantages that the ozone aging resistance is improved, the self-storage and high-temperature aging resistance are improved, and meanwhile, the aging resistance and the mechanical property of the modified epoxy resin are also improved.

Description

technical field [0001] The invention belongs to the field of preparation of terminal functional group polymers, in particular to a preparation method of an ozone aging-resistant carboxyl-terminated telechelic liquid rubber. Background technique [0002] Carboxyl-terminated telechelic liquid rubber is a low-molecular-weight polymer with active carboxyl groups at the end of the main chain of the molecule. It belongs to a viscous flowable liquid polymer with a relative molecular mass of less than 10,000. The two active functional groups of the carboxyl-terminated telechelic liquid rubber are located at both ends of the molecular chain of the prepolymer, and the physical properties of the cured and molded liquid rubber are better than those of ordinary liquid rubber. The most common carboxyl telechelic polymers are mainly diene-type liquid rubbers such as carboxyl-terminated polybutadiene rubber (CTPB) and carboxyl-terminated nitrile rubber (CTBN), which are mainly used as aeros...

Claims

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Application Information

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IPC IPC(8): C08F236/06C08F220/48C08F220/60
CPCC08F236/06C08F220/60C08F220/48
Inventor 齐永新吕徳斌胡盼张芬铭朱月朵生亮
Owner 天元(杭州)新材料科技有限公司
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