Solventless polyurethane spray compositions and method for applying them
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United States of America Patent
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Sep 22, 1987
Grant Date -
N/A
app pub date -
May 23, 1986
filing date -
May 23, 1986
priority date (Note) -
Expired
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Abstract
A method for preparing polyurethane by spraying solventless, equal volume mixtures of: (a) a liquid polyisocyanate; polyisocyanurate or isocyanate terminated quasi-prepolymer; and (b) a curing agent comprised of a blend of from about 0 to 15% of a polyamine having an equivalent weight from about 30 to about 200, about 10 to 20% of a low molecular weight glycol having an equivalent weight of from about 30 to 200, about 40 to 80% of a relatively high molecular weight polyol or polyamine having an equivalent weight of about 350 to 2000, and about 1 to 20% of a synthetic zeolite molecular sieve, wherein the average equivalent weight of (b) is from about 150 to 500.
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