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Antioxidants for thermoplastic styrene-butadiene block copolymers

A styrene-butadiene block and antioxidant technology is applied in the field of antioxidants for thermoplastic styrene-butadiene block copolymers, and achieves the effects of convenient use, low addition cost and good protection

Active Publication Date: 2016-03-02
RIANLON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The traditional antioxidant system of SBS is a 1:1 compound of 2,6-di-tert-butyl-4-methylphenol (BHT) and tris(nonylphenyl)phosphite (TNPP), and the addition amount is 0.8%. But this antioxidant system has a risk of safe use

Method used

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  • Antioxidants for thermoplastic styrene-butadiene block copolymers
  • Antioxidants for thermoplastic styrene-butadiene block copolymers
  • Antioxidants for thermoplastic styrene-butadiene block copolymers

Examples

Experimental program
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Effect test

example 1

[0022] Weigh the sample 4-hydroxy-3,5-di-tert-butylphenylpropionic acid C7-C9 mixed alcohol ester (antioxidant 1135) 18g (1.8 parts), 2-methyl-4,6-di(octylthiomethyl ) 10g (1.0 parts) of phenol, 8g (0.8 parts) of the reaction product of N‐phenylaniline and 2,4,4‐trimethylpentene (antioxidant 5057) to make compound antioxidant 1#.

example 2

[0024] Weigh the sample 4‐hydroxy‐3,5‐di-tert-butylphenylpropionic acid C7‐C9 mixed alcohol ester 18g (1.8 parts), 2‐methyl‐4,6‐di(octylthiomethyl)phenol 10g (1.0 Parts), N-phenylaniline and 2,4,4-trimethylpentene reaction product 12g (1.2 parts), made of compound antioxidant 2#.

example 3

[0026] Weigh the sample 4-hydroxy-3,5-di-tert-butylphenylpropionic acid C7-9 mixed alcohol ester 22g (2.2 parts), 2-methyl-4,6-bis(octylthiomethyl)phenol 10g (1.0 Parts), N-phenylaniline and 2,4,4-trimethylpentene reaction product 12g (1.2 parts), made of compound antioxidant 3#.

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Abstract

The invention relates to an antioxidant for a thermoplastic butylbenzene segmented copolymer. The antioxidant comprises the following components in parts by weight: 1.0 part of 4-hydroxy-3,5-di-tert-butyl propanoic acid C7-C9 mixed alcohol ester, 1.8-2.2 parts of 2-methyl-4,6-di(methyl octyl sulfide) phenol and 0.8-1.2 parts of reaction products of N-aminobiphenyl and 2,4,4-trimethylpentene. The compound antioxidant system disclosed by the invention is added in a production process of SBS (Styrene Butadiene Styrene), and the addition amount of the compound antioxidant system accounts for 0.2%-0.6% of the weight of SBS crude rubber. The antioxidant disclosed by the invention is a liquid product, has 100% oxidation resisting function, can be dissolved into a cyclohexane solvent at high concentration, can not be precipitated at usage temperature, can not block a conveying pipeline, and achieves the convenience for use.

Description

technical field [0001] Thermoplastic styrene-butadiene block copolymer, referred to as SBS, the invention relates to an antioxidant system applied to SBS, the antioxidant is composed of liquid sulfur-containing hindered phenolic antioxidant 2‐methyl‐4,6‐bis(octylthiomethyl ) phenol, liquid hindered phenolic antioxidant 4-hydroxy-3,5-di-tert-butylphenylpropionic acid C7-9 mixed ester, liquid amine antioxidant N-phenylaniline and 2,4,4-trimethyl The reaction product of pentene is a liquid antioxidant system configured at a ratio of 1.0:1.8-2.2:0.8-1.2 (weight ratio), and is used in the SBS production process at 0.2-0.6% (weight %) relative to the amount of SBS glue ; It can slow down the oxidative degradation of SBS during production, storage, transportation and use, thereby reducing the physical and chemical properties. Background technique [0002] The polymerization mechanism of SBS belongs to a typical active anion polymerization. During the polymerization process, cycloh...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L53/02C08K5/134C08K5/375C08K5/18
Inventor 安平汤翠祥孙春光
Owner RIANLON
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