Blow-moldable rigid thermoplastic polyurethane resins

Details Blow-moldable rigid thermoplastic polyurethane resins Blow-moldable rigid thermoplastic polyurethane resins

1995-01-30

1997-07-15

Sergent, Rabon

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

524186, 524222, 524223, 524721, 524728, 528 49, 528 51, 528 52, 528 58, 528 77, 528 85, C08K 513, C08G 1824, C08L 7504

Patent

active

056484127

ABSTRACT:
A rigid thermoplastic polyurethane with improved melt strength can be prepared by deactivating the catalyst for the polymer subsequent to the onset of urethane bond formation. Catalyst deactivation is accomplished either with a latent deactivator for the catalyst, or an active deactivator. The further addition of a crosslinker to the reaction mixture can provide an even greater improvement of melt strength.

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