Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1993-09-10
1995-01-24
Welsh, Maurice J.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
525 79, 525 90, 525 94, 528 59, 528 60, 528 55, 528 71, C08G 1804
Patent
active
053843622
ABSTRACT:
The invention relates to vinyl sulfonated and non-sulfonated hydroxy functional polyurethane copolymers prepared from macromonomer diols and their use in magnetic recording media. The sulfonated hydroxy functional copolymer comprises: a polyurethane backbone; at least one SO.sub.3 M group pendant from the polyurethane backbone, wherein the polyurethane backbone has an S0.sub.3 M equivalent weight of from about 2,000 to about 100,000, and wherein M is selected from the group consisting of H.sup.+, NR.sub.4.sup.+ wherein R can be H.sup.+ or an alkyl group, Li.sup.+, Na.sup.+, K.sup.+, and mixtures thereof; at least two crosslinkable hydroxy groups pendant from the polyurethane backbone, wherein the polyurethane backbone has a hydroxy equivalent weight of from about 500 to about 50,000; and at least one vinyl polymeric segment B pendant from the polyurethane backbone.
REFERENCES:
patent: 4837082 (1989-06-01), Harrell et al.
patent: 5071578 (1991-12-01), Ohkubo et al.
Chemical Abstract No. 90-041398106 of Japanese Patent No. 01319122.
Chemical Abstract of Japanese Patent No. 01282726.
Jones et al., Journal of Inorganic and Nuclear Chemistry, 40, 1235 (1978).
Chujo et al., Polymer Bulletin, 8, 239 (1982).
Anderson Jeffrey T.
Carlson James G.
Dowdall Janice L.
Griswold Gary L.
Kirn Walter N.
Minnesota Mining and Manufacturing Company
Welsh Maurice J.
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