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US 5,472,987 AGranted
Surfactant composition for flexible polyurethane foam
AssigneeOSi Specialties, Inc.
InventorsJames D. Reedy, Richard T. Robertson
Life of this patent
Estimating the term…
Abstract
Surfactants for conventional flexible polyurethane foam may be improved by the addition of a minor amount of an organic acid salt.
Claims26
A composition which is a mixture comprising:
- a) from about 99.98% to about 90% by weight of a "nonhydrolyzable" siloxane-polyether copolymer surfactant of the type suitable for use in conventional flexible polyurethane foam, said surfactant possessing a siloxane chain containing at least 26 silicon atoms exclusive of endcapping groups;
- and
- b) from about 0.02% to about 10% by weight of an organic acid salt having the general formula A.sub.a M.sub.m, the amounts recited above being based upon the sum of the siloxane-polyether copolymer surfactant and the organic acid salt, wherein:
- A is an anionic organic moiety in which the organic portion contains at least 2 carbon atoms, and the anionic portion is an anion selected from the group consisting of sulfonate, phosphate, phosphinate, phosphonate, and carboxylate;
- M is a cation selected from the group consisting of cations of the metals of groups Ia, IIa, and IIb of the periodic table, R'.sub.4 N.sup.+, and R'.sub.4 P.sup.+, wherein R' is alkyl of 1-18 carbon atoms or a phenyl-substituted alkyl group;
- a is a number corresponding to the charge of M;
- and
- m is a number corresponding to the charge on the anionic portion of A.
5 more elements
A method for improving a "non-hydrolyzable" siloxane-polyether copolymer surfactant with respect to its ability to stabilize a reacting polyurethane foam composition and to facilitate production of high quality foam, comprising the step of:
- adding to said surfactant an organic acid salt having the general formula A.sub.a M.sub.m wherein:
- A is an anionic organic moiety in which the organic portion contains at least 2 carbon atoms, and the anionic portion is an anion selected from the group consisting of sulfonate, phosphate, phosphinate, phosphonate, and carboxylate;
- M is a cation selected from the group consisting of cations of the metals of groups Ia, IIa, and IIb of the periodic table, R'.sub.4 N.sup.+, and R'.sub.4 P.sup.+, wherein R' is alkyl of 1-18 carbon atoms or a phenyl-substituted alkyl group;
- a is a number corresponding to the charge on M;
- and
- m is a number corresponding to the charge on the anionic portion of A;
- said organic acid salt being employed in the resulting mixture of said surfactant and said organic acid salt in an amount from about 0.02% to about 10% by weight of said mixture.
4 more elements
Dependencies are inferred from the claim text.