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Low-cis polybutadiene rubber, preparation method thereof, hips resin, preparation method thereof, and abs resin

A technology of polybutadiene rubber and cis-polybutadiene, which is applied in the field of low-cis polybutadiene rubber and its preparation, and ABS resin, can solve problems such as difficulty in obtaining impact resistance, achieve high solution viscosity, The effect of high impact resistance

Active Publication Date: 2021-05-11
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The molecular weight and molecular weight distribution of toughened rubber are positively correlated with the rubber particle size in the final HIPS. If the performance of polybutadiene rubber is not well controlled, it will be difficult to obtain HIPS resin with higher impact resistance

Method used

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  • Low-cis polybutadiene rubber, preparation method thereof, hips resin, preparation method thereof, and abs resin
  • Low-cis polybutadiene rubber, preparation method thereof, hips resin, preparation method thereof, and abs resin
  • Low-cis polybutadiene rubber, preparation method thereof, hips resin, preparation method thereof, and abs resin

Examples

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preparation example Construction

[0022] The second aspect of the present invention provides a kind of preparation method of above-mentioned low-cis polybutadiene rubber, the method comprises:

[0023] (1) In a non-polar hydrocarbon solvent, in the presence of an organolithium initiator and a structure regulator, 1,3-butadiene is subjected to anionic solution polymerization, and the conversion rate to 1,3-butadiene is More than 99% to obtain polybutadiene active chains with a number average molecular weight of 80,000-100,000; the molar ratio of 1,3-butadiene to the organolithium initiator is 1450-1850:1;

[0024] (2) In the presence of a coupling agent, the product of the anionic solution polymerization reaction is subjected to a coupling reaction; the molar ratio of the coupling agent to the organolithium initiator is 0.14-0.3:1;

[0025] (3) Terminating the product of the coupling reaction in the presence of a terminator.

[0026] According to the present invention, the preparation method of this low-cis po...

Embodiment 1

[0088] This example is used to illustrate the LCBR rubber of the present invention and its preparation method.

[0089] (1) Under the protection of nitrogen, organic solvent, 1,3-butadiene monomer and structure regulator (see Table 1 for the type and amount, and the amounts listed in the table are all measured as pure compounds) are added to the reactor, And after being heated to specified temperature, add organolithium initiator (type and consumption are shown in Table 1, and the consumption listed in the table is all metered with pure compound), then carry out anionic solution polymerization reaction (conditions are shown in table) under this temperature and specified reaction pressure 1), obtain the monomer conversion rate shown in table 1;

[0090] (2) then in the product of anionic solution polymerization, add coupling agent (its kind and consumption are shown in Table 2, and the consumption listed in the table is all measured with pure compound), to carry out coupling re...

Embodiment 2-5

[0093] This example is used to illustrate the LCBR rubber of the present invention and its preparation method.

[0094] According to the method described in Example 1, the difference is that the parameters shown in Tables 1 and 2 were used for the reaction, thereby obtaining LCBR rubbers PB2-PB5 respectively, and the structure and properties of the obtained polymer were determined, and the results are shown in Table 3.

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Abstract

The invention relates to the field of styrene resins, in particular to low-cis polybutadiene rubber and its preparation method, HIPS resin, its preparation method and ABS resin. The molecular weight of this low-cis polybutadiene rubber is a bimodal distribution, the number average molecular weight of the low molecular weight component in the bimodal is 80,000-100,000, and the peak area is 25-45%; the high molecular weight component in the bimodal The number-average molecular weight is 250,000-320,000, and the peak area is 55-75%; in the low-cis polybutadiene rubber, the 1,2 structure content is 6-20% by weight, and the Mooney viscosity ML at 100°C 1+4 It is 40-65, and the viscosity of 5% by weight styrene solution is 80-120cp at 25°C. The low-cis polybutadiene rubber of the invention has moderate Mooney viscosity, high solution viscosity and narrow molecular weight distribution, and can be used as a toughening agent to prepare HIPS resin or ABS resin with high impact resistance.

Description

technical field [0001] The invention relates to the field of styrene resins, in particular to low-cis polybutadiene rubber and its preparation method, HIPS resin, its preparation method and ABS resin. Background technique [0002] In the preparation of HIPS resin (i.e. high impact polystyrene, high impact polystyrene), the rubber conventionally selected as a toughening agent can be low cis polybutadiene rubber, high cis polybutadiene rubber, butadiene -Isoprene copolymer, solution polystyrene butadiene rubber, styrene-butadiene-styrene copolymer, especially low-cis polybutadiene rubber and high-cis polybutadiene rubber are the best. For low-temperature tough resins, low-cis polybutadiene rubber and its derivative block styrene-butadiene rubber are generally used for toughening. However, the molecular weight of toughened rubber and its distribution have a significant impact on the impact resistance of continuous bulk HIPS resin. Usually, if the molecular weight of rubber is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F136/06C08F2/06C08F2/38C08F279/02C08F212/08C08L55/02C08L9/00
CPCC08F136/06C08F279/02C08L55/02C08F2/06C08F2/38C08F212/08C08L9/00
Inventor 李建成王雪赵姜维孙伟
Owner CHINA PETROLEUM & CHEM CORP
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