Polyamine-epihalohydrin resinous reaction products
AssigneeMonsanto Company
InventorsJohn P. Petrovich, Donald N. Van Eenam
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Abstract
Resinous reaction products wherein the hydrohalide salt of a polyamine is condensed with an epihalohydrin provides improved wet strength and improved dry strength to cellulosic substrates such as paper, paperboard, and the like. It has been found that the wet strength and dry strength of paper products can be significantly improved by using a resinous reaction product resulting from the removal of halide ions from the polyamine hydrohalide salt before it is condensed with an epihalohydrin.
Claims8
A method for preparing a resinous composition which comprises:
- A. forming an amine prepolymer containing a hydrohalide,
- B. removing a substantial amount of the halide ion from the amine prepolymer, and thereafter,
- C. contacting the substantially halide-free amine prepolymer with an epihalohydrin.
A resinous composition comprising the reaction product of a substantially halide-free polymer of diallylamine which has been prepared from a halide-containing diallylamine prepolymer and from about 0.1 to about 2.0 moles of an epihalohydrin per mole of amine group.
Dependencies are inferred from the claim text.