Low cis-polybutadiene rubber, preparation method and application thereof, HIPS resin and preparation method thereof

A cis-polybutadiene and polybutadiene rubber technology, applied in the field of polybutadiene rubber, can solve the problems of turbidity of styrene solution, high APHA chromaticity, high yellow index of HIPS resin, and achieve excellent impact resistance , low yellow index, the effect of broad application prospects

Active Publication Date: 2022-02-25
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the traditional LCBR star rubber, the styrene (or toluene) solution of LCBR products is cloudy, the APHA chroma is high, and the yellow index of the prepared HIPS resin is high, which cannot meet the requirements of downstream users.

Method used

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  • Low cis-polybutadiene rubber, preparation method and application thereof, HIPS resin and preparation method thereof
  • Low cis-polybutadiene rubber, preparation method and application thereof, HIPS resin and preparation method thereof
  • Low cis-polybutadiene rubber, preparation method and application thereof, HIPS resin and preparation method thereof

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specific Embodiment approach

[0080] According to a preferred embodiment of the present invention, the antioxidant is 4,6-bis(octylthiomethyl)o-cresol (antiaging agent 1520) and β-(3,5-di-tert-butyl-4 -A combination of n-octadecanyl hydroxyphenyl) propionate (antiaging agent 1076), and in said combination, said 4,6-bis(octylthiomethyl) o-cresol and said β-( The weight ratio of n-octadecyl 3,5-di-tert-butyl-4-hydroxyphenyl)propionate is 0.5-5:1, more preferably 1:1.

[0081] Preferably, the weight ratio of the antioxidant to the 1,3-butadiene monomer is 0.1-0.6:100, preferably 0.1-0.4:100, more preferably 0.2-0.3:100.

[0082] In the method described in the second aspect of the present invention, in order to extract the low-cis polybutadiene rubber from the reaction product that terminates or introduces an oxidant, it may also include subjecting the reaction product to steam condensation treatment to remove the solvent , and drying to remove moisture and other post-processing steps known in the art, the pr...

specific Embodiment approach 1

[0085] The method includes:

[0086] (1) Under a protective atmosphere, in a non-polar hydrocarbon solvent, in the presence of an organolithium initiator and a structure regulator, the 1,3-butadiene monomer is subjected to anionic solution polymerization reaction to 1,3- The butadiene monomer is completely converted to obtain a polybutadiene active chain with a number average molecular weight of 100,000-130,000, preferably 105,000-125,000, more preferably 110,000-120,000; the 1,3-butane The molar ratio of the diene monomer to the organolithium initiator is 1850-2450:1, preferably 1950-2350:1;

[0087] (2) In the presence of a halogen-free coupling agent, the product of the anionic solution polymerization reaction is subjected to a coupling reaction to obtain a polybutadiene active chain with a bimodal distribution of the number average molecular weight, the coupling agent and the organic The molar ratio of lithium initiator used is 0.07-0.16:1, preferably 0.08-0.15:1;

[008...

specific Embodiment approach 2

[0090] The method includes:

[0091] (1) Under a protective atmosphere, in a non-polar hydrocarbon solvent, in the presence of an organolithium initiator and a structure regulator, the 1,3-butadiene monomer is subjected to anionic solution polymerization reaction to 1,3- The butadiene monomer is completely converted to obtain a polybutadiene active chain with a number average molecular weight of 100,000-130,000, preferably 105,000-125,000, more preferably 110,000-120,000; the 1,3-butane The molar ratio of the diene monomer to the organolithium initiator is 1850-2450:1, preferably 1950-2350:1;

[0092] (2) In the presence of a halogen-free coupling agent, the product of the anionic solution polymerization reaction is subjected to a coupling reaction to obtain a polybutadiene active chain with a bimodal distribution of the number average molecular weight, the coupling agent and the organic The molar ratio of lithium initiator is 0.07-0.16:1, preferably 0.08-0.15:1;

[0093] (3...

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Abstract

The invention relates to the technical field of polybutadiene rubber, and discloses low cis-polybutadiene rubber, a preparation method and an application thereof, HIPS resin and a preparation method thereof, and the number-average molecular weight of the low cis-polybutadiene rubber is in bimodal distribution; the content weight ratio of a 1, 2-structural unit to a 1, 4-structural unit in the low cis-polybutadiene rubber is (0.06-0.25): 1; the Mooney viscosity ML1+4 of the low cis-polybutadiene rubber at the temperature of 100 DEG C is 40 to 60; the viscosity of the low cis-polybutadiene rubber in a 5wt% styrene solution at 25 DEG C is 130-190cp; and the APHA chromaticity of a 5wt% styrene solution of the low cis-polybutadiene rubber is less than 5. The low cis-polybutadiene rubber does not contain halogen, APHA chromaticity is low, the low cis-polybutadiene rubber is used as a flexibilizer of continuous bulk HIPS / ABS resin, and the prepared resin has excellent impact resistance and extremely low yellow index.

Description

technical field [0001] The invention relates to the technical field of polybutadiene rubber, in particular to a low-cis polybutadiene rubber, a method for preparing low-cis polybutadiene rubber, and the low-cis polybutadiene rubber Application in preparing resin, a kind of HIPS resin and its preparation method. Background technique [0002] Low-cis polybutadiene rubber (LCBR) has low gel content, no transition metals, good color; random distribution of cis-trans, no crystallization at low temperature, good low-temperature impact resistance, and free adjustment of molecular weight; moderate The content of 1,2-polymerized structural units, high grafting and crosslinking reactivity, etc., have become the first choice for toughening rubber for modification of resins, especially HIPS resins and ABS resins. [0003] But, when the low-cis-polybutadiene rubber on the market is used as resin toughening agent at present, the impact resistance performance of resin is still not ideal, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L9/00C08F279/02C08F212/08C08F279/04C08F220/44
CPCC08L9/00C08F279/02C08F279/04C08L2205/025C08F212/08C08F220/44Y02T10/86
Inventor 李建成徐忠亮刘天鹤赵爱红朱晓光王冬萍王大伟
Owner CHINA PETROLEUM & CHEM CORP
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