C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
400/3029, 154/10
C08L 53/00 (2006.01) B32B 7/12 (2006.01) C08F 279/02 (2006.01) C08L 33/06 (2006.01) C09J 4/06 (2006.01)
Patent
CA 1183629
ABSTRACT A structurally toughened heat resistant adhesive composition comprising a solution of polyisoprene elastomer in polymerizable acrylate ester monomers. The adhesive composition also contains an adhesion promoter, a cross-linking agent, a free-radical generator and a free-radical accelerator. The adhesive compositions are generally used as two-part systems, and yield bonds with improved heat and solvent resistant properties. The polymerizable acrylate ester monomers may be monofunctional or a combination of mono- and polyfunctional monomers. Among the useful classes of monomers are alkyl and cycloalkyl acrylates, alkyl and cycloalkyl methacrylates, alkoxy acrylates and methacrylates, alkylene diacrylates and dimethacrylates. A few of the preferred monomers are methyl methacrylate, lauryl methacrylate, isobornyl methacrylate, and tetrahydrofurfuryl methacrylate. The preferred polyisoprene rubbers are generally copolymers (or block copolymers) of (i) isoprene with styrene, acrylonitrile, or methacrylonitrile; (ii) homopolymers of polyisoprene; or (iii) copolymers of either (i) or (ii) with a functional monomer; or (iv) mixtures of the above. Most preferred are the homopolymers of isoprene.
377322
Loctite Corporation
Macrae & Co.
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