Adhesive compositions and method of bonding

Details Adhesive compositions and method of bonding Adhesive compositions and method of bonding

C - Chemistry, Metallurgy

08

G

12/104, 400/1806

C08G 18/10 (2006.01) A43D 25/20 (2006.01) C08G 18/08 (2006.01) C09J 5/06 (2006.01) C09J 175/06 (2006.01)

Patent

CA 1225492

ABSTRACT The disclosure describes a method of bonding a sole to a shoe upper by providing on attaching surfaces of one or both of the sole and shoe upper a layer of adhesive composition comprising a moisture curable poly- urethane formed from a first component comprising a di- isocyanate, and a second component comprising a substan- tially linear hydroxy polyester in proportions to provide a prepolymer having NCO groups available for reaction, and a third component comprising a monofunctional reactant present in an amount sufficient to react with up to 40 mole % of the NCO groups of the product of the prepolymer reaction. Each layer of adhesive composition is then exposed to airborne moisture to bring about chain exten- sion of the urethane moisture curable polyurethane. The layer or at least one of the layers of the adhesive composition is heated to bring it to tacky adhesive condition, and the attaching surfaces of the sole and upper are pressed together with the composition between them to form an adhesive bond between the sole and the shoe upper. The composition used in this method is also disclosed. This method results in sole attaching in a convenient manner without exposing the shoe upper or sole to excessive conditions of temperature and humidity.

451275

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