Polyurethane foam composite

• US 3,966,521 A
• Filed: 06/16/1975
• Issued: 06/29/1976
• Est. Priority Date: 10/10/1974
• Status: Expired due to Term

• Current Assignee: BASF Corporation (BASF SE)
• Original Assignee: BASF Wyandotte Corporation (BASF SE)
• Inventors: Patton, John T. Jr., Ramlow, Gerhard G., Pizzini, Louis C., Demou, John G.
• Primary Examiner(s): Whitby, Edward G.
• Application Number:
  US05/587,476
• Time in Patent Office: 379 Days
• Field of Search: 156/78, 156/272, 156/306, 260/33.2 R, 260/2.5 AJ, 260/2.5 AT, 264/45.1, 264/45.5, 264/46.4, 428/311, 428/425, 428/315, 106/15 FP
• US Class Current: 156/78
• CPC Class Codes: B32B 27/40 comprising polyurethanes
• CPC Class Codes: C08G 18/63 Block or graft polymers obtained by polymerising compounds having carbon-to-carbon double bonds on to polymers
• CPC Class Codes: C08G 18/635 onto unsaturated polymers
• CPC Class Codes: C08G 18/638 characterised by the use of compounds having carbon-to-carbon double bonds other than styrene and/or olefinic nitriles
• CPC Class Codes: C08G 18/6795 Unsaturated polyethers
• CPC Class Codes: C08J 5/121 by heating
• CPC Class Codes: Y10S 521/918 Physical aftertreatment of a cellular product
• CPC Class Codes: Y10T 428/249992 Linear or thermoplastic

Abstract

Composites based on polyurethane foams heat sealed to a substrate are prepared from polyurethane foams employing a graft polyol as a component of the foam-forming reaction mixture. The resulting composites possess exceptional bonding strength.

Claims

1. In a process for the production of a laminated composite which comprises heat sealing a substrate to a polyurethane foam prepared by the reaction of an organic polyisocyanate with a polyol in the presence of a blowing agent the improvement which comprises employing as the polyol a graft polyol prepared by the in situ polymerization in the presence of a free radical catalyst of an ethylenically unsaturated monomer or mixture of monomers in a polyol.

2. The process of claim 1 wherein the substrate is polyvinyl chloride.

3. The process of claim 1 wherein the organic polyisocyanate is toluene diisocyanate.

4. The process of claim 1 wherein the graft polyol is prepared by the in situ polymerization in the presence of a free radical catalyst of an ethylenically unsaturated monomer or mixture of monomers in an unsaturation-containing polyol.

5. The process of claim 4 wherein the mixture of ethylenically unsaturated monomers is styrene and acrylonitrile.

6. The process of claim 4 wherein the mixture of ethylenically unsaturated monomers is styrene, acrylonitrile and bis(β

-chloroethyl)vinyl phosphonate.

7. The process of claim 4 wherein the unsaturation-containing polyol is prepared by the reaction of a polyether polyol with an organic compound having both ethylenic unsaturation and a hydroxyl, carboxyl or epoxy group.

8. The process of claim 1 wherein the foam is prepared by the reaction of an organic polyisocyanate with a graft polyol in the presence of a blowing agent and a phosphorus-containing organic compound.