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Low cis-polybutadiene rubber, preparation method thereof, HIPS and preparation method ofHIPS

A technology of polybutadiene rubber and cis-polybutadiene, which is applied in the fields of HIPS resin and its preparation, low-cis polybutadiene rubber and its preparation, can solve corrosion, occupy a large area, and cannot be realized Balance and other issues to achieve the effect of solving corrosion problems, achieving halogen-free, balanced gloss and impact resistance

Pending Publication Date: 2021-10-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The former is represented by Asahi Kasei Corporation of Japan. No branching agent is added during the polymerization process. Its products have a linear structure and cannot achieve a balance between the Mooney viscosity and the viscosity of a 5% styrene solution. Difficult to balance gloss and impact resistance at the same time
The latter is represented by Arlanxeo, which performs polymerization reaction in the first reactor, coupling reaction in the second reactor, and termination reaction in the third reactor; this kind of process is long and requires a large investment. , covers a large area, and the chlorine-containing silane used in this type of product is used as a coupling agent. Chloride ions enter the condensed water and colloidal particles in the post-treatment stage, corroding the post-treatment equipment

Method used

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

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preparation example Construction

[0036] The second aspect of the present invention provides the preparation method of above-mentioned low-cis polybutadiene rubber, wherein, the method comprises:

[0037] (1) In an inert solvent, in the presence of organolithium initiators, gel inhibitors and structure regulators, 1,3-butadiene is continuously fed from the reactor bottom position R 1 into the reactor to carry out the first anionic solution polymerization reaction, and the conversion rate of 1,3-butadiene reaches 20%-50%;

[0038] (2) Under the second anionic solution polymerization reaction conditions, the branched monomer is continuously fed from the feed position R of the reactor 2 is added to the reactor, and the conversion rate to 1,3-butadiene and branched monomer is above 99%, wherein, 02 -R 1 2 -R 1 is the height difference between the feed position of the branched monomer and the bottom of the reactor;

[0039] (3) The mixture obtained in step (2) is contacted with a terminator to perform a terminat...

Embodiment 1

[0101] This example is used to illustrate the low-cis polybutadiene rubber of the present invention and its preparation method.

[0102] (1) Under the protection of nitrogen, continuously pour into the 16L reactor from the bottom of the reactor to R 1 Add n-hexane solvent, 1,3-butadiene monomer, 1,2-butadiene (gel inhibitor), organolithium initiator and structure regulator respectively (see Table 1 for the types and amounts, Table 1 The flow rate listed in is all measured with pure compound); And carry out the first anionic solution polymerization reaction (conditions are shown in Table 1) under specified temperature and reaction pressure;

[0103] (2) At 1 / 4 from the bottom of the reactor (R 2 at the R 2 -R 1 =1 / 4H), the n-hexane solution that will contain the branched monomer DVB is continuously added in the reactor, and carry out the second anionic solution polymerization reaction (condition sees Table 2) under specified temperature and reaction pressure

[0104] (3) Ad...

Embodiment 2-5

[0107] This example is used to illustrate the low-cis polybutadiene rubber of the present invention and its preparation method.

[0108] According to the method described in Example 1, the difference is that the materials and amounts shown in Table 1 are used to react, thereby obtaining the polymerization solutions PB2-PB6 of low-cis polybutadiene rubber respectively, wherein the respective low-cis polybutadiene The content of the butadiene rubber is: PB2: 15.8% by weight; PB3: 15.7% by weight; PB4: 15.7% by weight; PB5: 15.8% by weight.

[0109] After the first anionic solution polymerization and before the second anionic solution polymerization, some samples were taken out of the polymerization solution, and the finally obtained polymerization solution samples were taken out for steam condensation and desolvation treatment to obtain polymers C2-C5 for structure and performance determination. The results were See Table 3.

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Abstract

The invention relates to the field of HIPS resins, and discloses a low cis-polybutadiene rubber, a preparation method thereof, an HIPS resin and a preparation method of the HIPS resin. The content of a 1, 2-polymerized structural unit in the low cis-polybutadiene rubber is 8-20 wt%; the number-average molecular weight of the polymer is 80,000-100,000 g / mol; the molecular weight distribution coefficient is 1.65-1.95; the Mooney viscosity ML1+4 at 100 DEG C is 40-60; and the viscosity of a 5 wt% styrene solution at 25 DEG C is 71-100 cp. The low cis-polybutadiene rubber is used as a flexibilizer, and the HIPS resin with more balanced impact resistance and glossiness can be obtained.

Description

technical field [0001] The invention relates to the field of synthetic rubber and resin, in particular to low-cis polybutadiene rubber and its preparation method, HIPS resin and its preparation method. Background technique [0002] The selection of rubber varieties is a key technology in HIPS resin toughening. Theoretically speaking, the rubber selected by the continuous bulk method HIPS resin can be LCBR rubber, high-cis polybutadiene rubber, styrene-butadiene rubber and styrene-butadiene-styrene thermoplastic elastomer, etc. Toughened rubber cannot choose a cross-linked structure, because cross-linked rubber cannot undergo grafting reactions. In the traditional body process, high-cis polybutadiene rubber is used. High-cis polybutadiene rubber has a low glass transition temperature, is easy to relax, and has good impact resistance, but has a tendency to crystallize at low temperature, which is not conducive to the development of low temperature toughness. improve. For lo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F236/10C08F212/36C08F279/02C08F212/08
CPCC08F236/10C08F279/02C08F212/08C08F212/36Y02T10/86
Inventor 李建成刘天鹤鲁文平王雪
Owner CHINA PETROLEUM & CHEM CORP
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