Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Patent
1990-06-05
1992-03-24
Schofer, Joseph L.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
524560, 524556, C09D 500
Patent
active
050989480
ABSTRACT:
Disclosed herein are water-based protective composition for coating films. The compositions contain (a) a water-based dispersion of copolymer particles having a number average molecular weight of from 2,000 to 20,000 and a glass transition point of from -10.degree. C. to +40.degree. C. and obtained by emulsion-polymerizing 100 parts by weight of a monomer mixture consisting substantially of (X) 7-12 parts by weight of an .alpha.,.beta.-monoethylenically-unsaturated carboxylic acid and (Y) 88-93 parts by weight of at least one ester selected from the group consisting of C.sub.1-4 -alkyl acrylates and C.sub.1-4 -alkyl methacrylates; as well as specific amounts of (b) an ultraviolet absorber, (c) an antioxidant, (d) a thickening agent and (e) a surface active agent. They can form barrier coats having excellent removability, weatherability, waterproofness, heat resistance and coating-film-protecting property. Their preparation processes are also disclosed.
REFERENCES:
patent: 4810751 (1989-03-01), Jellinek et al.
Nippon Oil Co.
Schofer Joseph L.
Smith Jeffrey T.
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