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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 fields of ABS resin, low-cis polybutadiene rubber and its preparation, can solve the problems of difficulty in obtaining impact resistance and the like, and achieve high solution viscosity, The effect of high impact resistance

Active Publication Date: 2021-02-05
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

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preparation example Construction

[0022]The second aspect of the present invention provides a method for preparing the above-mentioned low-cis polybutadiene rubber, the method comprising:

[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 reaction, and the conversion rate of 1,3-butadiene is 99% or more to obtain a polybutadiene active chain with a number average molecular weight of 102,000-130,000; the molar ratio of 1,3-butadiene to the organic lithium initiator is 1800-2500:1;

[0024](2) In the presence of a coupling agent, subject the product of the anionic solution polymerization reaction to a coupling reaction; the molar ratio of the coupling agent and the organolithium initiator is 0.1-0.2:1;

[0025](3) In the presence of a terminator, the product of the coupling reaction is terminated.

[0026]According to the present invention, the preparation method of the low-cis polybutadiene rubber w...

Embodiment 1

[0079]This example is used to illustrate the LCBR rubber of the present invention and its preparation method.

[0080](1) Under the protection of nitrogen, add non-polar hydrocarbon solvents, 1,3-butadiene monomers and structure modifiers (types and dosages are shown in Table 1, the dosages listed in the table are all measured as pure compounds) Inside the reactor, add the organolithium initiator after heating to the specified temperature (see Table 1 for the type and amount, and the amounts listed in the table are all measured as pure compounds), and then carry out the anionic solution polymerization reaction at this temperature and the specified reaction pressure (The conditions are shown in Table 1) to obtain the monomer conversion rate shown in Table 1;

[0081](2) Then the coupling agent is added to the product of the anionic solution polymerization reaction (see Table 2 for its type and amount, and the amounts listed in the table are all measured as pure compounds) to carry out the ...

Embodiment 2-5

[0084]This example is used to illustrate the LCBR rubber of the present invention and its preparation method.

[0085]According to the method described in Example 1, the difference is that the parameters shown in Tables 1 and 2 are used for the reaction to obtain LCBR rubber PB2-PB5, respectively. The structure and performance of the obtained polymer are measured. 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 102,000-130,000, and the peak area is 45-65%; the high molecular weight component in the bimodal The number-average molecular weight is 300,000-420,000, and the peak area is 35-55%; 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 140-190cp at 25°C. The 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 higher impact resistance.

Description

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

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F136/06C08F8/42C08F2/06C08F279/02C08F212/08C08L55/02C08L51/04
CPCC08F2/06C08F8/42C08F136/06C08F279/02C08F2500/05C08F2500/17C08L51/04C08L55/02C08F212/08
Inventor 李建成王雪赵姜维孙伟
Owner CHINA PETROLEUM & CHEM CORP
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