Peroxide and radiation curable compositions containing isobutylenene copolymers having acrylate functionality

• US 5,824,717 A
• Filed: 06/07/1995
• Issued: 10/20/1998
• Est. Priority Date: 05/27/1988
• Status: Expired due to Fees

• Current Assignee: Exxon Chemical Patents Inc. (Exxon Mobil Corporation)
• Original Assignee: Exxon Chemical Patents Inc. (Exxon Mobil Corporation)
• Inventors: Dias, Anthony Jay, Wang, Hsien-Chang, Merrill, Natalie Ann
• Primary Examiner(s): CHAPMAN, MARK A
• Application Number:
  US08/476,754
• Time in Patent Office: 1,231 Days
• Field of Search: 522/81, 522/35, 522/904, 522/149, 525/333.4
• US Class Current: 522/81
• CPC Class Codes: C08F 210/08 Butenes
• CPC Class Codes: C08F 210/10 Isobutene
• CPC Class Codes: C08F 210/14 Monomers containing five or more carbon atoms
• CPC Class Codes: C08F 212/04 containing one ring
• CPC Class Codes: C08F 212/12 Monomers containing a branched unsaturated aliphatic radical or a ring substituted by an alkyl radical
• CPC Class Codes: C08F 212/21 Bromine
• CPC Class Codes: C08F 2500/03 Narrow molecular weight distribution, i.e. Mw/Mn < 3
• CPC Class Codes: C08F 2800/10 as molar percentages
• CPC Class Codes: C08F 2800/20 as weight or mass percentages
• CPC Class Codes: C08F 2810/30 leading to the formation or introduction of aliphatic or alicyclic unsaturated groups
• CPC Class Codes: C08F 2810/50 wherein the polymer is a copolymer and the modification is taking place only on one or more of the monomers present in minority
• CPC Class Codes: C08F 8/20 Halogenation
• CPC Class Codes: C08G 81/021 Block or graft polymers containing only sequences of polymers of C08C or C08F
• CPC Class Codes: C08L 23/02 not modified by chemical after-treatment
• CPC Class Codes: C08L 23/22 Copolymers of isobutene; Butyl rubber ; Homo- or copolymers of other iso-olefins
• CPC Class Codes: C08L 23/283 Halogenated homo- or copolymers of iso-olefins
• CPC Class Codes: C08L 2666/02 Organic macromolecular compounds, natural resins, waxes or and bituminous materials
• CPC Class Codes: C08L 2666/04 Macromolecular compounds according to groups C08L7/00 - C08L49/00, or C08L55/00 - C08L57/00; Derivatives thereof
• CPC Class Codes: C08L 2666/24 Graft or block copolymers according to groups C08L51/00, C08L53/00 or C08L55/02; Derivatives thereof
• CPC Class Codes: C08L 71/123 not modified by chemical after-treatment
• CPC Class Codes: C09D 123/22 : Copolymers of isobutene; Butyl rubber ; Homo- or copolymers of other iso-olefines
• CPC Class Codes: C09D 125/16 : Homopolymers or copolymers of alkyl-substituted styrenes
• CPC Class Codes: C09J 7/381 : based on macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
• CPC Class Codes: G03F 7/038 : Macromolecular compounds which are rendered insoluble or differentially wettable G03F7/075 takes precedence; macromolecular azides G03F7/012; macromolecular diazonium compounds G03F7/021
• CPC Class Codes: G03F 7/0388 : with ethylenic or acetylenic bands in the side chains of the photopolymer
• CPC Class Codes: Y10S 522/904 : Monomer or polymer contains initiating group

Abstract

The invention relates to peroxide- or radiation-curable copolymer containing compositions and to the resulting radiation- or peroxide- cured compositions. The compositions may optionally contain a reinforcing filler. Copolymers employed in the compositions are acrylate modified copolymers of an isoolefin of 4 to 7 carbon atoms and para-alkylstyrene comonomers. Since the percentage of extractables from the cured composition is negligible, the cured compositions are suitable for use in the manufacture of a variety of high purity rubber goods used in the pharmaceutical and health care industries. In addition, the compositions may be employed as condenser packings and as food contact materials or wire cable insulation materials. Further, the cured composition may be employed in the manufacture of high purity hoses.

Claims

1. A peroxide or radiation curable composition comprising:

(i) a copolymer of an isoolefin of 4 to 7 carbon atoms and para-alkylstyrene comonomer;

acrylate functionality nucleophilically grafted randomly onto a portion of the para-alkyl groups of the copolymer;

heat stabilizing free radical scavenger functionality nucleophically grafted randomly onto a second portion of the para-alkyl groups of the copolymer; and

(ii) a filler.

2. The cured composition of claim 1 wherein the composition is either peroxide curable or radiation curable.

3. The composition of claim 1 wherein the filler is selected from the group consisting of fumed alumina, aluminum hydroxide, aluminum, bronze, lead, zinc, aluminum oxide, magnesium oxide, silicon dioxide, titanium dioxide, zinc oxide, asbestos, clay, calcium silicate, feldspar, glass, mica, nepheline, perlite, pyrophyllite, talc, wollastonite, barium sulfate, calcium sulfate, lithopone, zinc sulfide, cellulose, fatty acids and esters, mineral rubber, calcium carbonate, barium carbonate, magnesium carbonate, calcium fluoride, sodium aluminum fluoride, and carbon black.

4. A cured composition comprising:

(i) a copolymer of an isoolefin of 4 to 7 carbon atoms and para-alkylstyrene comonomer;

acrylate functionality nucleophilically grafted randomly onto a portion of the para-alkyl groups of the copolymer;

heat stabilizing free radical scavenger functionality nucleophically grafted randomly onto a second portion of the para-alkyl groups of the copolymer; and

(ii) a filler.

5. The cured composition of claim 4 wherein the filler is selected from the group consisting of fumed alumina, aluminum hydroxide, aluminum, bronze, lead, zinc, aluminum oxide, magnesium oxide, silicon dioxide, titanium dioxide, zinc oxide, asbestos, clay, calcium silicate, feldspar, glass, mica, nepheline, perlite, pyrophyllite, talc, wollastonite, barium sulfate, calcium sulfate, lithopone, zinc sulfide, cellulose, fatty acids and esters, mineral rubber, calcium carbonate, barium carbonate, magnesium carbonate, calcium fluoride, sodium aluminum fluoride, and carbon black.