Gel reduction in blends of thermoplastic polyurethane and...

Details Gel reduction in blends of thermoplastic polyurethane and... Gel reduction in blends of thermoplastic polyurethane and...

2003-08-29

2009-10-06

Miggins, Michael C (Department: 1794)

Stock material or miscellaneous articles

Hollow or container type article

Polymer or resin containing

C428S035400, C428S036600, C428S069000, C428S423100, C036S028000, C036S03000A

Reexamination Certificate

active

07597946

ABSTRACT:
Gas barrier layers and composites contain a low gel sheet produced from a composition containing a thermoplastic polyurethane (TPU), a hydroxyl functional copolymer, and a gel reducing additive. The gel reducing additive has functional groups that can react with isocyanate groups to reduce gel formation during the processing of blends of urethane containing polymers and hydroxyl functional polymers. Multilayer composites containing the low gel sheets can be made into inflatable membranes for containing an inflationary gas. In a particularly preferred embodiment, the membranes are used as bladders of cushioning devices in the soles of shoes, particularly athletic shoes.

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Chinese Notification of the First Office Action issued Apr. 11, 2008.

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