Polyurethane carpet backing process based on polymeric MDI quasi

Details Polyurethane carpet backing process based on polymeric MDI quasi Polyurethane carpet backing process based on polymeric MDI quasi

1995-05-10

1996-09-24

Johnson, Rachel

Stock material or miscellaneous articles

Pile or nap type surface or component

Particular backing structure or composition

25218222, 528 67, 427244, 4273899, 427373, 521160, C08G 1870

Patent

active

055589170

ABSTRACT:
This invention relates to a novel polyisocyanate based on polymethylene poly(phenylisocyanate), to a process for the production of a polyurethane backing on a substrate using this novel polyisocyanate to produce the polyurethane backing, and to the polyurethane backed substrate produced by this process. In particular, this novel polyisocyanate has a functionality of less than about 2.4, an isocyanate group content of 25 to 30%, and a urethane content of from about 2 to 6%, and comprises comprising polymethylene poly(phenylisocyanate), from about 5 to 25% of 4,4'-methylene bis(phenyloisocyanate), and from about 20 to 50% of 2,2'- and 2,4'-methylene bis(phenyl-isocyanate). This polyisocyanate can be reacted with a polyol mixture to produce the polyurethane backing on a substrate.

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