Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1991-07-19
1992-09-08
Schofer, Joseph L.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
424 59, 526271, 526332, 5263483, 525313, C08F25508, C08F26106, C08F26704, C08F22206, C08F21612, A61K 742
Patent
active
051456699
ABSTRACT:
What is provided herein is a sunscreen composition consisting essentially of a crosslinked, neutralized terpolymer of maleic anhydride, a C.sub.1 -C.sub.5 alkyl vinyl ether and a C.sub.12 -C.sub.14 alpha-olefin monomer as a thickener; water; an ultraviolet sunscreening agent; and an emulsifier. In the preferred form of the invention, the monomers are present in a molar ratio of about 1:0.90-0.99:0.01-0.10, respectively, and are crosslinked with about 2-8 wt. % of a crosslinking agent based on the total weight of the monomers. Suitably, the crosslinked terpolymer is neutralized to increase water solubility.
REFERENCES:
patent: 4370454 (1983-01-01), Messmer eet al.
patent: 5034486 (1991-07-01), Tzai et al.
Helioff Michael W.
Kopolow Stephen L.
Kwak Yoon T,
Tazi Mohammed
Cheng Wu C.
ISP Investments Inc.
Katz Walter
Maue Marilyn J.
Schofer Joseph L.
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