Thermoplastic polyurethanes of mixtures of hard and soft thermoplast polymers

US4129611A · kind A · utility

Assignee

• Mobay Chemical Corporation · US

Inventor

• Herbert Heiss · Unterhaching, DE

Key dates

• Filing date: Dec 9, 1974
• Grant date: Dec 12, 1978
• Expiry date: Dec 9, 1994

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L75/04
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Thermoplastic poluyrethane polymers having improved physical properties over a wide temperature range are produced from a physical mixture of thermoplastic polymers of (a) from about 10 to about 90 percent of a soft polymer prepared from an organic isocyanate having an average functionality of about 2 and an organic compound or compounds containing active hydrogen atoms and having an average functionality of about 2 and an average equivalent weight greater than 200 at an NCO to active hydrogen ratio of from about 0.9/1 to about 1.1/1, and (b) from about 90 to 10 percent of a hard polymer prepared by reacting at an NCO to active hydrogen ratio of from about 0.9/1 to about 1.2/1 an organic icocyanate having an average functionality of from about 1.90 to about 2.20 with an organic compound or compounds containing active hydrogen atoms and having an average functionality of about 2 and an average equivalent weight less than 100.