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US 6,320,012 B1Granted
Isocyanate formulations containing activated chain extenders
AssigneeBayer Aktiengesellschaft
InventorsRick L. Adkins, William E. Slack, Edward P. Squiller
Life of this patent
Estimating the term…
Abstract
The reactivity of isocyanate formulations is controlled by including a chain extender corresponding to the formula HO—R1—NR2—X—NR3—R4—OH (I) in which R1, R2, X, R3 and R4 represent specified groups is included in the isocyanate formulation.
Claims6
A stable isocyanate formulation comprising
- a) a diisocyanate or polyisocyanate and
- b) a chain extender comprising 2,2′-[1,4-cyclohexyl bis-[methylene(methylimino)]] bis ethanol.
A stable isocyanate formulation comprising
- a) a diisocyanate or polyisocyanate and
- b) a chain extender comprising 2,2′-[1,4-cyclohexyl bis-[methylene(ethylimino)]] bis ethanol.
A stable isocyanate formulation comprising
- a) a diisocyanate or polyisocyanate and
- b) a chain extender comprising 2,2′-[hexamethylene bis-(methylimino)] diethanol.
A stable isocyanate formulation comprising
- a) a diisocyanate or polyisocyanate and
- b) a chain extender comprising 2,2′-[hexamethylene bis-(ethylimino)] diethanol.
A stable isocyanate formulation comprising
- a) a diisocyanate or polyisocyanate and
- b) a chain extender comprising 3,12-diethyl-6,9-dioxa-3,12-diazatetradecane-1,14-diol.
Dependencies are inferred from the claim text.