Low cis-polybutadiene rubber as well as preparation method and application thereof

A polybutadiene rubber, low-cis technology, applied in the field of low-cis polybutadiene rubber, can solve the problems that do not involve coupling polymer Mooney viscosity and SV value, and achieve low SV value, high threshold Ni viscosity, simple process effect

Active Publication Date: 2012-07-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The continuous polymerization process of the present invention is involved in the synthesis process, but the patent only emphasizes the influence of th

Method used

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  • Low cis-polybutadiene rubber as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] Example 1 (Basic molecular weight of the first kettle design is 55000)

[0072] Under the protective atmosphere of high-purity nitrogen, the residence time of the system is 70 minutes, and 2706 g / h of raffinate, 544 g / h of 1,3-butadiene, 0.325 g / h of tetrahydrofuran, and 0.633 g / h of n-butyllithium are continuously added to the first kettle. h and 1,2-butadiene 0.978g / h. Adjust and control the polymerization reaction temperature and reaction pressure to be 60°C and 0.3-0.4MPa respectively, so as to make the 1,3-butadiene react. After the first kettle was stabilized, 0.386 g / h of silicon tetrachloride was continuously added to the second kettle.

[0073]Add 0.315 g / h terminator isopropanol to the outlet of the last kettle (namely the second kettle) to terminate the reaction, and add 0.2% by weight of the monomer Irganox 1520, and then carry out steam coagulation and desolvation treatment on the glue.

[0074] The molecular parameters (molecular weight and molecular w...

Embodiment 2

[0075] Example 2 (Basic molecular weight of the first kettle design is 70000)

[0076] Under the protective atmosphere of high-purity nitrogen, the residence time of the system is 40 minutes, and 5670 g / h of cyclohexane, 952 g / h of 1,3-butadiene, 0.567 g / h of tetrahydrofuran, and 0.87 g / h of n-butyllithium are continuously added to the first kettle. h and 1,2-butadiene 1.701g / h. Adjust and control the polymerization reaction temperature and reaction pressure to be 70° C. and 0.3-0.4 MPa respectively, so as to make the 1,3-butadiene react. After the first kettle was stabilized, 0.462 g / h of silicon tetrachloride was continuously added to the second kettle.

[0077] Add 0.432g / h terminator isopropanol to the outlet of the final kettle to terminate the reaction, and add 0.2% by monomer weight of anti-aging agent Irganox 1520, and then perform steam coagulation and desolventization treatment on the glue.

[0078] The analysis test results are shown in Table 1.

Embodiment 3

[0079] Example 3 (Basic molecular weight of the first kettle design is 50000)

[0080] Under the protective atmosphere of high-purity nitrogen, the residence time of the system is 30 minutes, and the mixed solvent (cyclohexane and n-hexane, weight ratio is 88:12) 6286g / h and 1,3-butadiene 1292g / h are continuously added to the first kettle , ethyl tetrahydrofurfuryl ether 0.045g / h, n-butyllithium 1.653g / h and 1,2-butadiene 2.268g / h. The polymerization reaction temperature and reaction pressure are controlled to be 90° C. and 0.3-0.4 MPa respectively, so that 1,3-butadiene is reacted. After the first kettle was stabilized, 1.054 g / h of silicon tetrachloride was continuously added to the second kettle.

[0081] Add 0.922 g / h terminator isopropanol to the outlet of the final kettle to terminate the reaction, and add 0.2% by weight of the monomer Irganox 1520, and then carry out steam coagulation and desolvation treatment on the glue.

[0082] The analysis test results are show...

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Abstract

The invention relates to a low cis-polybutadiene rubber as well as a preparation method and application thereof. The preparation method is characterized in that in a polymerization system formed by connecting at least two polymerization reaction kettles in series, in a non-polar solvent containing a structure regulating agent, an stable single-functionality initiator is adopted to initiate the polymerization of polybutadiene and then a conventional chain-end coupling technology is combined, so as to prepare the low cis-polybutadiene rubber having high Mooney viscosity and low SV (styrene viscosity) value (5% rubber-styrene solution viscosity at 25 DEG C). The properties of the prepared low cis-polybutadiene rubber are as follows: (1) the content of the vinyl group in a monomer unit is 8-14%wt; (2) a number-average molecular weight range is 80,000-110,000; (3) the Mooney viscosity ML[1+4] at the temperature of 100 DEG C is 45-65; (4) molecular weight distribution is 1.5-1.8; and (5) the SV value is 0.04-0.059Pa.s. The low cis-polybutadiene rubber synthesized by using the method can be applied to the field of plastic modification, and is especially suitable for preparation of a high-impact high-gloss grade polystyrene (PS) resin.

Description

technical field [0001] The invention relates to a low-cis polybutadiene rubber, its preparation method and its application. Specifically, the present invention relates to a 1,3-butadiene homopolymer with high Mooney viscosity and low SV value (5wt% rubber-styrene solution viscosity at 25°C) and its preparation method. The low-cis polybutadiene rubber synthesized by the invention can be used in the field of plastic modification, and is especially suitable for the preparation of high-impact and high-gloss grade polystyrene (PS) resin. Background technique [0002] In order to improve the impact resistance of general-purpose polystyrene (GPPS), rubber is usually introduced into it to produce high-impact polystyrene (HIPS). High-impact polystyrene has a "sea-island" structure formed by dispersing small rubber particles in the homopolymerized polystyrene matrix phase, in which the rubber phase consists of cross-linked rubber, styrene monomers bonded in rubber macromolecules It ...

Claims

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Application Information

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IPC IPC(8): C08F136/06C08F2/38C08F8/42C08F279/02
Inventor 吕万树李传清于国柱徐林邰峰王雪胡保利关逸英王丽丽鲁文平
Owner CHINA PETROLEUM & CHEM CORP
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