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US 5,189,073 AGranted
Process for the production of expanded materials based on polyurea elastomers
AssigneeTexaco Chemical Company
InventorsHeiko Humbert, Werner Klockemann, Dudley J. Primeaux, II
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Abstract
A process for the production of expanded polyurea elastomers which comprises reacting: a) an aliphatic polyetheramine having primary amino functions and essentially no free hydroxyl groups; b) carbon dioxide in the form of carbamate, obtained by reacting carbon dioxide with a portion of the aliphatic polyetheramines; c) a polyisocyanate; d) water; and e) a catalyst having a tertiary amino group; in the presence of f) an inert, halogen-free blowing agent.
Claims21
A process for the production of expanded polyurea elastomers comprising reacting:
- a) an aliphatic polyetheramine having primary amino functions and essentially no free hydroxyl groups;
- b) carbon dioxide in the form of carbamate, obtained by reacting carbon dioxide with a portion of the aliphatic polyetheramines;
- c) a polyisocyanate;
- d) water;
- and
- e) a catalyst having a tertiary amino group;
- in the presence of
- f) an inert, halogen-free blowing agent.
5 more elements
Dependencies are inferred from the claim text.