Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
178 words
A clear coating composition having a film forming binder solids content of about 30-70% by weight and an organic liquid carrier, wherein the binder consists essentially of about (A) 50-80% by weight, based on the weight of the binder, of an acrylic polymer consisting essentially of polymerized monomers of styrene, a methacrylate monomer selected from the group consisting of methyl methacrylate, isobornyl methacrylate, cyclohexyl methacrylate or any mixtures thereof, a second methacrylate monomer selected from the group consisting of n-butyl methacrylate, isobutyl methacrylate or ethyl hexyl methacrylate or any mixtures thereof and a hydroxy alkyl methacrylate or hydroxy alkyl acrylate each having 1-4 carbon atoms in the alkyl group; wherein the acrylic polymer has a number average molecular weight of about 5,000-20,000 determined by gel permeation chromatography and a calculated Tg of at least 40° C. and correspondingly, (B) 20-50% by weight, based on the weight of the binder, of an organic polyisocyanate; wherein the coating composition cures to a tack free state within 3 hours of application and to a Persoz hardness of at least 30 counts.
Claim 2
Dependent Claim
178 words
A clear coating composition having a film forming binder solids content of about 30-70% by weight and an organic liquid carrier, wherein the binder consists essentially of about (A) 50-80% by weight, based on the weight of the binder, of an acrylic polymer consisting essentially of polymerized monomers of styrene, a methacrylate monomer selected from the group consisting of methyl methacrylate, isobornyl methacrylate, cyclohexyl methacrylate or any mixtures thereof, a second methacrylate monomer selected from the group consisting of n-butyl methacrylate, isobutyl methacrylate or ethyl hexyl methacrylate or any mixtures thereof and a hydroxy alkyl methacrylate or hydroxy alkyl acrylate each having 1-4 carbon atoms in the alkyl group; wherein the acrylic polymer has a number average molecular weight of about 5,000-20,000 determined by gel permeation chromatography and a calculated Tg of at least 40° C. and correspondingly, (B) 20-50% by weight, based on the weight of the binder, of an organic polyisocyanate; wherein the coating composition cures to a tack free state within 3 hours of application and to a Persoz hardness of at least 30 counts.
Claim 3
Dependent Claim
25 words
The composition of claim 1 in which the acrylic polymer consists essentially of polymerized monomers of styrene, methyl methacrylate, isobutyl methacrylate and hydroxy ethyl methacrylate.
Claim 4
Dependent Claim
25 words
The composition of claim 1 in which the acrylic polymer consists essentially of polymerized monomers of styrene, methyl methacrylate, n-butyl methacrylate and hydroxy ethyl methacrylate.
Claim 5
Dependent Claim
55 words
The composition of claim 2 in which the acrylic polymer consists essentially of polymerized monomers of 5-20% by weight, based on the weight of the polymer, of styrene, 10-30% by weight of methyl methacrylate, 30-60% by weight of isobutyl methacrylate and 10-30% by weight hydroxy ethyl methacrylate where the total of the monomer equals 100%.
Claim 6
Dependent Claim
16 words
The composition of claim 2 in which the organic polyisocyanate is an aliphatic or cycloaliphatic polyisocyanate.
Claim 7
Dependent Claim
16 words
The composition of claim 5 in which the organic polyisocyanate is the trimer of hexamethylene diisocyanate.
Claim 8
Dependent Claim
28 words
The composition of claim 1 in which the composition contains about 0.01-2% by weight of the binder, of a catalyst of triethylene diamine and an alkyl tin laurate.
Claim 9
Dependent Claim
21 words
The composition of claim 1 in which the clear composition contains about 0.1-10% by weight of ultraviolet light absorbers and antioxidants.
Claim 10
Dependent Claim
15 words
A substrate coated with a dried and cured layer of the composition of claim 1.