Process for the Preparation of a 1,3-Butadiene and Styrene Copolymer Containing a Random Section in its Main Chain Followed by a Block with a Structure Differentiated from the Main Chain, Homopolymeric or Copolymeric, Functionalized and the Product Obtained From This

a technology of 1,3-butadiene and styrene, which is applied in the field of process for the preparation of a 1,3-butadiene and styrene copolymer containing a random section in its main chain followed by a block with a structure differentiated from the main chain, homopolymeric or copolymer, functionalized and the product obtained from this. it can solve the problems of reducing the performance of one of the others and being impossibl

Inactive Publication Date: 2011-06-02
LANXESS ELASTOMEROS DO BRASIL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0020]The elastomeric product thus produced allows for the production of tires with highly desirable performance specifications, particularly with respect to the tread.

Problems solved by technology

Obtaining materials that are perfectly adaptable in their usage has been a constant challenge for science and technology in recent years.
Performance improvement in one of these properties normally results in a decrease in the performance in one of the others.
This is equally undesirable and most of the time it becomes impossible to optimize all the properties.

Method used

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  • Process for the Preparation of a 1,3-Butadiene and Styrene Copolymer Containing a Random Section in its Main Chain Followed by a Block with a Structure Differentiated from the Main Chain, Homopolymeric or Copolymeric, Functionalized and the Product Obtained From This
  • Process for the Preparation of a 1,3-Butadiene and Styrene Copolymer Containing a Random Section in its Main Chain Followed by a Block with a Structure Differentiated from the Main Chain, Homopolymeric or Copolymeric, Functionalized and the Product Obtained From This
  • Process for the Preparation of a 1,3-Butadiene and Styrene Copolymer Containing a Random Section in its Main Chain Followed by a Block with a Structure Differentiated from the Main Chain, Homopolymeric or Copolymeric, Functionalized and the Product Obtained From This

Examples

Experimental program
Comparison scheme
Effect test

example 1 (

B2)

[0104]Preparation of an elastomer of type s-SBR functionalized, whose main polymeric chains have a random distribution in their constituent mers and a controlled microstructure, containing an end block of polybutadiene, followed by a continuous sequence of the siloxane functional group (—[—Si(CH3)2—O—]—) and a silanol termination (—Si(CH3)2—OH).

[0105]A schematic representation of the structure of this elastomer is presented below:

where, R1 and R2═CH3; PBD=block of polybutadiene; n=n° of siloxane units

[0106]In a 2 liter capacity reactor, equipped with a turbine type mechanical agitator and a refrigeration cover, the first step was performed of the anionic copolymerization of the 1,3-butadiene monomers and styrene, in a solution of cyclohexane, with the polar additive TMEDA, and using n-butyl-lithium as the initiator.

[0107]For this copolymerization, the reactor was filled with 182 g of 1,3-butadiene, 46 g of styrene, 1290 g of cyclohexane and 1.5 g of TMEDA, aiming for a chemical c...

example 2 (

C2)

[0121]Preparation of an elastomer of type s-SBR functionalized, whose main polymeric chains have random distribution in their constituent mers and a controlled microstructure, containing an end block of polystyrene, followed by a continuous sequence of the siloxane functional group (—[—Si(CH3)2—O—]—) and a silanol termination (—Si(CH3)2—OH).

[0122]A schematic representation of the structure of this elastomer is presented below:

where, R1 and R2═CH3; PS=block of polystyrene; n=n° of siloxane units

[0123]In a 2 liter capacity reactor, equipped with a turbine type mechanical agitator and a refrigeration cover, the first step was performed of the anionic copolymerization of the 1,3-butadiene monomers and styrene, in a solution of cyclohexane, with the polar additive TMEDA, and using n-butyl-lithium as the initiator.

[0124]For this copolymerization, the reactor was filled with 146 g of 1,3-butadiene, 37 g of styrene, 1343 g of cyclohexane and 1.1 g of TMEDA.

[0125]For the initiation, a qua...

example 3

[0151]Vulcanized elastomeric compounds prepared with the group 1 elastomers.

[0152]The group 1 elastomers are type S-SBR. Their main polymeric chains have a random distribution in their constituent mers and a controlled microstructure, containing an end block of polybutadiene, followed by a continuous sequence of the siloxane functional group (—[—Si(CH3)2—O—]—) and a silanol termination (—Si(CH3)2—OH).

[0153]In Table 5, the main characteristics of these elastomers are presented.

TABLE 5S-SBRBlock ofTerminalElastomercompositionpolybutadieneFunctionalizationA221.0% styrene;not presentsiloxane groups and(reference)63.0% 1,2-terminal silanolvinyl (a)B119.0% styrene;Block with ansiloxane with an average64.1% 1,2-average of 50of 8.0 groups per chainvinyl (a)mers ofincluding silanol terminalbutadienegroupper chainB219.6% styrene;Block with ansiloxane with an average63.7% 1,2-average of 150of 5.0 groups per chainvinyl (a)mers ofincluding silanol terminalbutadienegroupper chain(a) = based on th...

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Abstract

This invention refers to a process for the preparation of a 1,3-butadiene and styrene copolymer, containing a random section in its main chain, followed by a block with a structure differentiated from the main chain, homopolymeric or copolymeric, functionalized, and the product obtained from this.

Description

[0001]This invention refers to a process for the preparation of a 1,3-butadiene and styrene copolymer, containing a random section in its main chain, followed by a block with a structure differentiated from the main chain, homopolymeric or copolymeric, functionalized, and the product obtained from this.BACKGROUND OF THE INVENTION[0002]Obtaining materials that are perfectly adaptable in their usage has been a constant challenge for science and technology in recent years. The growing demand for materials that have an appropriate balance of important and specific properties, added to the ecological restrictions of utilization, has produced great efforts from scientists in the search for innovative solutions to these challenges.[0003]The science of polymers has made a decisive contribution to this process. Due to intensive research and the use of sophisticated processes of polymerization, new products have been obtained, with a combination of properties that until now were not found in ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C08K5/524C08G77/442
CPCC08C19/44C08F236/06C08G77/442
Inventor NICOLINI, LUIZ FERNANDODE LIRA, CLOVIS HENRIQUESDE ALBUQUERQUE CAMPOS, CARLOS ROBERTOFIGUEIREDO, FERNANDO VASCONCELOSDOLINSKY, MAURO CRESTA DE BARROSPIRES, NEUSA MARIA TOCCHETODE SANT'ANNA, MONICA DE ALMEIDA
Owner LANXESS ELASTOMEROS DO BRASIL
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