Process for producing rubber laminates

Details Process for producing rubber laminates Process for producing rubber laminates

1984-10-30

1985-11-12

Robinson, Ellis P.

Stock material or miscellaneous articles

Composite

Including interfacial reaction product of adjacent layers

1563069, 1563311, 1563314, 1563317, 156334, 427302, 427340, 4274125, 4284233, 4284239, 4284248, 428517, 428519, B32B 710, B32B 3106, B32B 2740

Patent

active

045528160

ABSTRACT:
The invention discloses a novel process for producing covalently bonded laminated structures composed of polyurethane elastomer and vulcanized rubber layers. As the joining means for covalently bonding the polyurethane elastomer and vulcanizable rubber laminates the process utilizes novel grafted polyurethane joining compositions comprised of polyurethane elastomer, a polyisocyanate, and a hydroxyl containing polybutadiene difunctional linker molecule. In practicing the process of the invention, the grafted polyurethane joining composition is first prepared by means that create covalent chemical bonds between the polyurethane elastomer and a first functional (NCO) group on the polyisocyanate, as well as between a hydroxyl on the polybutadiene difunctional linker molecule and a second functional (NCO) group on the polyisocyanate. This novel grafted polyurethane composition is then used to bond layers of polyurethane elastomer to layers of vulcanizable rubber. In constructing a laminated product, the grafted polyurethane joining composition is interposed between the polyurethane elastomer and vulcanizable rubber layers. The resulting assembly is then heated at a temperature sufficient to allow formation of covalent bonds.

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patent: 4332858 (1982-06-01), Saitoh
patent: 4337111 (1982-06-01), Kauffman

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