C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
400/4003, 400/42
C08L 57/06 (2006.01) C08L 61/20 (2006.01) C09J 4/06 (2006.01)
Patent
CA 1156791
ABSTRACT A structurally toughened heat resistant adhesive composition comprising a solution of a polyacrylic 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 methacrylates, lauryl methacrylates, isobornyl methacrylates, and tetrahydrofurfuryl methacrylates. The preferred acrylic rubbers are generally the homopolymers of alkyl esters of acrylic or methacrylic acid; homopolymers of alkoxy esters of acrylic or methacrylic acid; or copolymers of either of these with a lower alkene. Most preferred are the rubbers formed from the copolymerization of ethyl acrylate with 2-chlorethyl vinyl ether, or from the copolymerization of ethylene, methyl acrylate and a third monomer containing carboxylic curing cites.
370344
Loctite Corporation
Marks & Clerk
LandOfFree
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