C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
400/3029, 154/10
C08L 53/02 (2006.01) B32B 7/12 (2006.01) C08F 287/00 (2006.01) C08L 33/06 (2006.01) C09J 4/06 (2006.01)
Patent
CA 1183988
ABSTRACT A structurally toughened heat resistant adhesive composition comprising a solution of butadiene-styrene block copolymers 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. It is preferred that the butadiene-styrene rubbers be block copolymers with the structures of (A)n(B)m, (ABA)n or (A-B)n, wherein A represents a polystyrene chain and B represents a polybutadiene chain; n and m are integers greater than or equal to one (1) and define the number of repeating units. Additionally, these structures generally contain a functional group at one or both ends of the plymer chain. Suitable functional groups are vinyl, epoxy, carboxy, and mercapto groups.
381411
Loctite Corporation
Marks & Clerk
LandOfFree
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