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A composition and elastomer technology, applied in tire parts, vehicle parts, special tires, etc., can solve problems such as failure to achieve or achieve high enough laboratory wear resistance
Inactive Publication Date: 2005-04-06
EXXONMOBIL CHEM PAT INC
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However, co-vulcanization still cannot reach a high enough degree and the wear resistance of the test chamber is still not up to the level of NR, SBR, etc.
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[0094] Although not meant to be limited by the following examples and tables, the present invention may be better understood by reference to the following examples and tables. The following symbols are used throughout the description to describe the rubber components of the present invention: IBIMS {terpolymer; poly(isobutylene-co-p-methylstyrene-co-isoprene)}; BrIBIMS {brominated terpolymer Copolymer; brominated poly(isobutylene-co-p-methylstyrene-co-isoprene)}; IBMS{poly(isobutylene-co-p-methylstyrene)}; BrIBMS{brominated poly( isobutylene-co-p-methylstyrene-co-p-bromomethylstyrene)}; SBB{brominated star-branched butyl rubber}; BR{polybutadiene}; NR{natural rubber}; and SBR {styrene-butadiene rubber}.
[0095] The synthesis of the terpolymers used in the present invention was carried out in two sets of 6-sample batch-operated apparatus, each demonstrating the use of two different initiators. Tert-butyl chloride (t-BuCl) was used as the initiator for tests A-F, and its data...
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Abstract
The present invention includes compositions suitable for use in tire treads or sidewalls and other articles requiring abrasion resistance and flexibility. The present invention includes tire treads or sidewalls prepared by combining: a filler; a sulfur-containing vulcanization system; optionally at least one second rubber; and at least one compound made of C 4 -C 8 Isoolefin derived units, C 4 -C 14 A halogenated terpolymer formed from polyolefin-derived units and p-alkylstyrene-derived units. Suitable examples of fillers include carbon black, silica and combinations thereof. The present invention also includes a method of producing an elastomeric terpolymer composition comprising combining C in a diluent in the presence of a Lewis acid and at least one initiator 4 -C 8 Isoolefin Monomer, C 4 -C 14 Polyolefin monomers, and p-alkylstyrene monomers to produce terpolymers. Examples of suitable initiators include cumyl compounds and / or halogenated organic compounds, especially secondary or tertiary halogenated compounds, for example, tert-butyl chloride, 2-acetyl-2-phenylpropane (cumyl acetate), 2- Methoxy-2-phenylpropane (cumyl methyl-ether), 1,4-bis(2-methoxy-2-propyl)benzene (bis(cumyl methyl ether)); cumyl halogenated compounds, especially chlorides, such as 2-chloro-2-phenylpropane, cumyl chloride ((1-chloro-1-methylethyl)benzene), 1,4-bis(2-chloro-2- Propyl)benzene (bis(cumyl chloride)) and 1,3,5-tris(2-chloro-2-propyl)benzene (tris(cumyl chloride)); aliphatic halides, especially chlorides, For example, 2-chloro-2,4,4-trimethylpentane (TMPCl) and 2-bromo-2,4,4-trimethylpentane (TMPBr).
Description
field of invention [0001] This invention relates to compositions of isobutylene-based terpolymers. More particularly, the present invention relates to terpolymer compositions wherein the terpolymer includes isoolefin-derived units, styrenic-derived units, and polyolefin-derived units, the compositions being useful in tires, particularly tire treads and tire sidewalls. Background of the invention [0002] Isobutylene based terpolymers comprising isoolefin, styrene and polyolefin derived units have been disclosed in U.S. 3,948,868, U.S. 4,779,657 and WO 01 / 21672. For example, in order to be used as part of a multicomponent automotive tire in a tire tread or tire sidewall, the desired terpolymer must be sulfur vulcanizable and compatible with other rubbers such as natural rubber and polybutadiene. Furthermore, to be useful as tire treads, the terpolymer composition must possess wear resistance as well as traction. These properties are often difficult to achieve together beca...
Claims
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