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US 5,961,783 AGranted
Process for enhancing the strength and sizing properties of cellulosic fiber using a self-emulsifiable isocyanate and a coupling agent
AssigneeVinings Industries, Inc.
InventorsJames H. Payton, Jorge F. Miranda, Delos E. Boardman
Life of this patent
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Abstract
The invention relates to a composition for enhancing the strength or sizing properties of a cellulosic fiber, comprising a) a self-emulsifying isocyanate and b) a coupling agent. The invention also relates to a kit of the composition, a process for enhancing the strength or sizing of a cellulosic fiber, products made from the process, and modified cellulosic fiber.
Claims47
A process for enhancing the strength or sizing properties of a cellulosic fiber, comprising contacting the fiber in an aqueous admixture with
- a) a self-emulsifiable isocyanate, and
- b) a coupling agent comprising a swelling clay or starch,
- wherein the addition of component (b) is within 3 seconds of the addition of component (a).
Dependencies are inferred from the claim text.