Thermoplastic polyurethanes

US4980445A · kind A · utility

Assignee

• THE DOW CHEMICAL COMPANY · US

Inventors

• Hanno R. Van der Wal · Hoek, NL
• Henry W. Bonk · Wallingford, US
• John Penfold · Sankt Gallen, CH

Key dates

• Filing date: Jan 17, 1989
• Grant date: Dec 25, 1990
• Expiry date: Jan 17, 2009

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G18/6603
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention concerns a thermoplastic polyurethane material which is the reaction product of (1) a mixture of (a) 0.86 to 0.98 mole equivalent of a polyester diol having the molecular weight of from 650 to 5,000 and (b) 0.02 to 0.14 mole equivalent of a polyether diol having the molecular weight of from 2,000 to 5,000, and (2) a difunctional chain extender with (3) an organic diisocyanate. These polyurethane materials exhibit high resistance to severe abrasion forces while retaining desirable mechanical properties and are useful for the manufacture of shoe soles, ski boots, ski bindings, conveyor belts and screens used by mining industry and the like.