Aqueous vinyl coatings
AssigneeRohm and Haas Company
InventorStephen Goth
Life of this patent
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Abstract
Disclosed is a process for treating and preserving a vinyl film substrate by applying thereto, followed by drying, a coating film of a polymer latex composition and an article produced thereby. The product article is characterized by an advantageous combination or balance of desirable properties including block resistance, surface tack, solvent resistance, plasticizer migration resistance, abrasion resistance, adhesion, and color stability.
Claims22
A process for making coated vinyl film by treating and preserving a vinyl film substrate, having a thickness of from 1 mil to 200 mils and being produced from a monomer mixture containing a total of 100 parts by weight comprising from about 85 to 100 parts by weight of vinyl chloride and from 0 to about 15 parts by weight of at least one member selected from the group consisting of vinylidene chloride, vinyl acetate, alkyl acrylates, alkyl methacrylates, styrene, acrylonitrile, alphaolefins and diene monomers, which comprises applying to the vinyl film substrate a coating film and then drying the coated vinyl film substrate under mild conditions of about 170.degree. to 300.degree. F. for about 0.05 min. to about 5 min. or more as required by the thickness of the coating film applied and by the solids content therein to obtain a dried film having a thickness of from about 0.05 mil to about 1 mil, wherein the coating film comprises a polymeric latex composition, having a polymer solids content of about 25% to about 60% by weight and comprises an aqueous emulsion addition polymer polymerized from a monomer mixture consisting essentially of
- (a) about 10 to 80 parts by weight, based on total monomer mixture, of at least one member selected from the group consisting of (i) C.sub.4 -C.sub.8 alkyl acrylates, (ii) a member of the group of vinyl aromatic monomers consisting of styrene, vinyl toluene, and alpha-methyl styrene, and (iii) C.sub.4 -C.sub.8 alkyl methacrylates,
- (b) about 15 to 30 parts by weight, based on total monomer mixture, of at least one nitrile-containing monomer selected from the group consisting of acrylonitrile and methacrylonitrile, and
- (c) 0 to about 25 parts by weight, based on total monomer mixture, of at least one member selected from the group consisting of C.sub.1 -C.sub.3 and C.sub.9 -C.sub.18 alkyl methacrylates, C.sub.1 -C.sub.3 and C.sub.9 -C.sub.18 alkyl acrylates, vinyl chloride, vinylidene chloride, vinyl acetate, alphaolefins, vinylidene chloride, vinyl acetate, alpha-olefins and diene monomers,
- the monomers being selected to provide a coating film formed therefrom having a T.sub.g of from about 20.degree. C. to about 85.degree. C. and the ratio of (a):(b) being from about 4:1 to about 3:2.
An article of manufacture consisting essentially of
- (a) a vinyl film substrate, having a thickness of 1 mil to 200 mils and being produced from a monomer mixture containing a total of 100 parts by weight comprising from about 85 to 100 parts by weight of vinyl chloride and from 0 to about 15 parts by weight of at least one member selected from the group consisting of vinylidene chloride, vinyl acetate, alkyl acrylates, alkyl methacrylates, styrene, acrylonitrile, alpha-olefins, and diene monomers, having adhered to at least one surface thereof
- (b) a dried coating film having a thickness of about 0.05 mil to about 1 mil comprising the dried product of a polymeric latex composition comprising an aqueous emulsion addition polymer polymerized from a monomer mixture consisting essentially of
- (1) about 10 to 80 parts by weight, based on total monomer mixture, of at least one member selected from the group consisting of (i) C.sub.4 -C.sub.8 alkyl acrylates, (ii) a member of the group consisting of vinyl aromatic monomers consisting of styrene, vinyl toluene, and alpha-methyl styrene, and (iii) C.sub.4 -C.sub.8 alkyl methacrylates,
- (2) about 15 to 30 parts by weight, based on total monomer mixture, of at least one nitrile-containing monomer
- the monomers being selected to provide a coating film formed therefrom having a T.sub.g of from about 20.degree. C. to about 85.degree. C. and the ratio of (a):(b) being from about 4:1 to about 3:2.
Dependencies are inferred from the claim text.