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Elastomeric compositions
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A kind of composition and elastomer technology, applied in the field of terpolymer composition
Inactive Publication Date: 2005-03-30
EXXONMOBIL CHEM PAT INC
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[0105] Although not meant to be limited by the following examples and tables, the present invention can be better understood by referring to the following examples and tables. The following symbols are used throughout the description to describe the rubber component of the present invention: IBIMS {terpolymer; poly(isobutylene-co-p-methylstyrene-co-isoprene)}; BrIBIMS {brominated ternary Copolymer; Brominated poly(isobutylene-co-p-methylstyrene-co-isoprene)}; IBMS{poly(isobutylene-co-p-methylstyrene)}; BrIBMS{poly(isobutylene-co -P-methylstyrene-co-p-bromomethylstyrene)}; SBB{brominated star-branched butyl rubber (poly(isobutylene-co-isoprene))}; BR{polybutylene Diene}; NR{natural rubber}; SBR{styrene-butadiene rubber}; and BIIR{brominated poly(isobutylene-co-isoprene)}.
[0106] The synthesis of the terpolymer used in the present invention was carried out in a 6-sample batch-operated device. Tert-butyl chloride (t-BuCl) is the initiator used for test A-F, and its data is shown in...
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Abstract
The present invention includes compositions suitable for air barriers such as innerliners where adhesion to tire carcass materials (e.g., SBR) and flexibility are desirable, as well as low air permeability. The invention includes a tire innerliner made by combining a filler; a sulfur cure system; optionally at least one secondary rubber; and at least one halogenated terpolymer of C4 to C8 isoolefin derived units, C4 to C14 multiolefin derived units, and p-alkylstyrene derived units. Examples of suitable fillers include modified carbon black, carbon black, silica, exfoliated clays, and combinations thereof. The present invention also includes a method of producing an elastomeric terpolymer composition comprising combining in a diluent C4 to C8 isoolefin monomers, C4 to C14 multiolefin monomers, and p-alkylstyrene monomers in the presence of a Lewis acid and at least one initiator to produce the terpolymer. Examples of suitable initiators include cumyl compounds and or halogenated organic compounds, especially secondary or tertiary halogenated compounds such as, for example, t-butylchloride, 2-acetyl-2-phenylpropane (cumyl acetate), 2-methoxy-2-phenyl propane (cumylmethyl-ether), 1,4-di(2-methoxy-2-propyl)benzene (di(cumylmethyl ether)); the cumyl halides, particularly the chlorides, such as, for example 2-chloro-2-phenylpropane, cumyl chloride (1-chloro-1-methylethyl)benzene), 1,4-di(2-chloro-2-propyl)benzene (di(cumylchloride)), and 1,3,5-tri(2-chloro-2-propyl)benzene (tri(cumylchloride)); the aliphatic halides, particularly the chlorides, such as, for example, 2-chloro-2,4,4-trimethylpentane (TMPCl), and 2-bromo-2,4,4-trimethylpentane (TMPBr).
Description
Invention field [0001] The present invention relates to a composition of isobutylene-based terpolymer. More particularly, the present invention relates to a terpolymer composition, wherein the terpolymer includes isoolefin-derived units, styrene-derived units, and polyolefin-derived units, and the composition can be used in tires, particularly for automotive components such as Tread, belt, tire inner liner, inner tube, and other inner liners. Background of the invention [0002] Isobutylene terpolymers including units derived from isoolefins, styrenes, and polyolefins have been disclosed in U.S. 3,948,868, U.S. 4,779,657, and WO01 / 21672. A composition including such a terpolymer and used for inner liners such as inner liners and inner tubes is not known. [0003] There is a need to improve the specific performance of the tire inner liner without sacrificing current performance. Compared with common elastomers (such as NR, BR or SBR) or their blends with isobutylene elastomers, is...
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