US4384070A — Pigmented, antioxidant-containing solution coatin…

Claim 1

Independent Claim 182 words

A pigmented coating solution adapted to deposit an organic coating possessing improved resistance to ultraviolet radiation-induced auto-oxidation comprising, organic solvent including aromatic hydrocarbon solvent, said solvent having dissolved therein an aromatic hydrocarbon-soluble, normally liquid, polysulfide or polydisulfide derivative in which the terminal --SH groups have been reacted with a monofunctional reactant providing a C 1 -C 22 alkyl terminal group to provide a polysulfide or polydisulfide derivative which is essentially nonreactive, said solvent also having dissolved therein a polar polymeric binder which degrades by a photo-oxidative mechanism and which has limited compatibility with said derivative, said derivative being present in an amount of 0.5% to 5%, based on total solids, and said solvent having suspended therein a pigment which is ultraviolet absorptive and which is present in a pigment to binder weight ratio of at least about 0.1, said pigment protecting the bulk of a deposited coating, and said limited compatibility causing a heated film of said coating solution to stratify as the solvent evaporates to concentrate said polysulfide or polydisulfide at the surface of the cured coating to protect the same.

Claim 2

Dependent Claim 182 words

A pigmented coating solution adapted to deposit an organic coating possessing improved resistance to ultraviolet radiation-induced auto-oxidation comprising, organic solvent including aromatic hydrocarbon solvent, said solvent having dissolved therein an aromatic hydrocarbon-soluble, normally liquid, polysulfide or polydisulfide derivative in which the terminal --SH groups have been reacted with a monofunctional reactant providing a C 1 -C 22 alkyl terminal group to provide a polysulfide or polydisulfide derivative which is essentially nonreactive, said solvent also having dissolved therein a polar polymeric binder which degrades by a photo-oxidative mechanism and which has limited compatibility with said derivative, said derivative being present in an amount of 0.5% to 5%, based on total solids, and said solvent having suspended therein a pigment which is ultraviolet absorptive and which is present in a pigment to binder weight ratio of at least about 0.1, said pigment protecting the bulk of a deposited coating, and said limited compatibility causing a heated film of said coating solution to stratify as the solvent evaporates to concentrate said polysulfide or polydisulfide at the surface of the cured coating to protect the same.

Claim 3

Dependent Claim 16 words

A coating solution as recited in claim 1 in which said polar polymeric binder is thermosetting.

Claim 4

Dependent Claim 23 words

A coating solution as recited in claim 2 in which said thermosetting binder comprises a polyester resin in admixture with an aminoplast resin.

Claim 5

Dependent Claim 40 words

A coating solution as recited in claim 3 in which said polyester resin is the hydroxy functional polyester made by reacting from 1.03 to 1.2 hydroxy equivalents of diol with 1 equivalent of carboxy functionality in a dicarboxylic acid component.

Claim 6

Dependent Claim 18 words

A coating solution as recited in claim 4 in which said aminoplast resin is a heat-hardening melamine-formaldehyde condensate.

Claim 7

Dependent Claim 22 words

A coating solution as recited in claim 2 in which said polar polymeric binder comprises from 5% to 50% of silicone resin.

Claim 8

Dependent Claim 32 words

A coating solution as recited in claim 1 in which there is used a polydisulfide having the formula: ##STR3## where n is from 2-50 and R is C 1 -C 20 aliphatic.

Claim 9

Dependent Claim 27 words

A coating solution as recited in claim 1 in which there is used a polydisulfide having the formula: ##STR4## where in is in the range of 3-10.

Claim 10

Dependent Claim 27 words

A coating solution as recited in claim 1 in which the terminal --SH groups of said polysulfide or polydisulfide derivative are terminated by reaction with acetic anhydride.

Claim 11

Dependent Claim 25 words

A coating solution as recited in claim 1 in which the terminal --SH groups of said polysulfide or polydisulfide derivative are terminated with octadecyl radicals.

Claim 12

Dependent Claim 138 words

A pigmented coating solution adapted to deposit an organic coating possessing improved resistance to ultraviolet radiation-induced auto-oxidation comprising, organic solvent including aromatic hydrocarbon solvent, said solvent having dissolved therein an aromatic hydrocarbon-soluble, normally liquid, polysulfide or polydisulfide derivative in which the terminal --SH groups have been reacted with a monofunctional reactant providing a C 1 -C 22 alkyl terminal group to provide a polysulfide or polydisulfide derivative which is essentially nonreactive, said solvent also having dissolved therein a polar polymeric binder which degrades by a photo-oxidative mechanism and which has limited compatibility with said derivative, said derivative being present in an amount of 0.5% to 5%, based on total solids, and said solvent having suspended therein a pigment which is ultraviolet absorptive and which is present in a pigment to binder weight ratio of at least about 0.1.

Claim 13

Dependent Claim 138 words

A pigmented coating solution adapted to deposit an organic coating possessing improved resistance to ultraviolet radiation-induced auto-oxidation comprising, organic solvent including aromatic hydrocarbon solvent, said solvent having dissolved therein an aromatic hydrocarbon-soluble, normally liquid, polysulfide or polydisulfide derivative in which the terminal --SH groups have been reacted with a monofunctional reactant providing a C 1 -C 22 alkyl terminal group to provide a polysulfide or polydisulfide derivative which is essentially nonreactive, said solvent also having dissolved therein a polar polymeric binder which degrades by a photo-oxidative mechanism and which has limited compatibility with said derivative, said derivative being present in an amount of 0.5% to 5%, based on total solids, and said solvent having suspended therein a pigment which is ultraviolet absorptive and which is present in a pigment to binder weight ratio of at least about 0.1.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1986-05-16	1986-11-15	1987-05-17	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1990-05-16	1990-11-15	1991-05-17	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1994-05-16	1994-11-15	1995-05-17	$7700.00	Window Closed / Lapsed

Pigmented, antioxidant-containing solution coating compositions

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