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US4049869A
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Method for preserving porous inorganic substrates
Assignee: United States Trading International Inc
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Filing: 1975-09-19
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Granted: 1977-09-20
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Expires: 1995-09-19
Abstract
Abstract A method for protecting porous inorganic substrates from damage by salt water, gaseous pollutants, graffiti, and erosion consists of applying to the porous inorganic substrate a gas and vapor permeable preservative composition consisting of an aqueous solution or dispersion of a carboxylated hydrophilic acrylic polymer, a cross-linking agent for the carboxylated hydrophilic acrylic polymer, and an effective amount of an ultraviolet-absorbing agent.
Inventors
- 👤 Charles F. De Long
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:56
CPC Classifications
C; C09; C09D; C09D133/00; C09D133/04; C09D133/06; C09D133/062; C09D133/064; C04; C04B; C04B41/00; C04B41/45; C04B41/46; C04B41/48; C04B41/483; C08; C08K; C08K5/00; C08K5/04; C08K5/06; C08K5/09; C08L; C08L33/00; C08L33/04; C08L33/06; C08L61/00; C08L63/00; C04B2111/00; C04B2111/20; C04B2111/25; C08L79/00; C08L79/02; C08L79/04; C08L79/08; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31511; Y10T428/31855; Y10T428/31935
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
108 words
A method for preserving porous inorganic substrates consisting of applying to the porous inorganic substrate a gas and vapor permeable preservative composition consisting of an aqueous solution or dispersion of a carboxylated hydrophilic acrylic copolymer containing monomer units from at least one C 1 -C 4 alkyl acrylate or methacrylate and about 5 to about 20% by weight of at least one carboxylic monomer, a cross-linking agent for the carboxylated hydrophilic acrylic copolymer constituting from about 1.0 to about 10% by weight of the aqueous solution or dispersion and from about 0.1 to about 2.0% by weight of said aqueous solution or dispersion of an ultra-violet absorbing agent.
Claim 2
Independent Claim
108 words
A method for preserving porous inorganic substrates consisting of applying to the porous inorganic substrate a gas and vapor permeable preservative composition consisting of an aqueous solution or dispersion of a carboxylated hydrophilic acrylic copolymer containing monomer units from at least one C 1 -C 4 alkyl acrylate or methacrylate and about 5 to about 20% by weight of at least one carboxylic monomer, a cross-linking agent for the carboxylated hydrophilic acrylic copolymer constituting from about 1.0 to about 10% by weight of the aqueous solution or dispersion and from about 0.1 to about 2.0% by weight of said aqueous solution or dispersion of an ultra-violet absorbing agent.
Claim 3
Dependent Claim
18 words
The method of claim 1, wherein the ultraviolet-absorbing agent absorbs from about 2,700 A° to about 3,300 A°.
Claim 4
Dependent Claim
42 words
The method of claim 1, wherein the composition also contains polyethylenimine or a hydrophilic polyethylenimine derivative and the hydrophilic acrylic polymer and the polyethylenimine or hydrophilic polyethylenimine derivative constitute from about 10 to about 50% by weight of the solution or dispersion.
Claim 5
Dependent Claim
29 words
The method of claim 3, wherein the ratio of polyethylenimine or hydrophilic polyethylenimine derivative to said carboxylated hydrophilic acrylic polymer is from about 1:1 to about 10:1 by weight.
Claim 6
Dependent Claim
12 words
The method of claim 1, wherein the ultraviolet-absorbing agent is 2-ethoxyethyl p-methoxycinnamate.
Claim 7
Dependent Claim
42 words
The method of claim 1, wherein said carboxylated hydrophilic acrylic polymer is a copolymer containing monomer units from at least one C 1 -C 4 alkyl acrylate or methacrylate and from about 5 to about 20% by weight of acrylic acid monomer.
Claim 8
Dependent Claim
26 words
The method of claim 1, wherein the cross-linking agent is selected from the group consisting of diglycidyl and triglycidyl ethers and low molecular weight epoxy resins.
Claim 9
Dependent Claim
24 words
The method of claim 1, wherein the cross-linking agent is selected from the group consisting of methylolated melamines and low molecular weight melamine-formaldehyde resins.
Claim 10
Dependent Claim
17 words
The method of claim 1, wherein the cross-linking agent is a multivalent inorgaic salt, oxide or hydroxide.
Claim 11
Dependent Claim
20 words
The method of claim 1, wherein the cross-linking agent is selected from zinc oxide, zinc carbonate and ammoniacal complexes thereof.
Claim 12
Dependent Claim
36 words
The method of claim 1, wherein said carboxylated hydrophilic acrylic copolymer is based on about 56% by weight of methyl methacrylate, about 30% by weight of ethyl methacrylate and about 14% by weight of acrylic acid.
Claim 13
Dependent Claim
35 words
The method of claim 1, wherein said carboxylated hydrophilic acrylic copolymer is based on about 44% by weight of butyl acrylate, 40% by weight of methyl acrylate and about 16% by weight of acrylic acid.
Claim 14
Dependent Claim
30 words
The method of claim 1, wherein said carboxylated hydrophilic acrylic copolymer is based on about 90% by weight of ethyl acrylate and about 10% by weight of acrylic acid units.
Claim 15
Dependent Claim
115 words
A porous inorganic substrate protected against damage by salt water, gaseous pollutants, graffiti, and erosion consisting of the substrate coated by a gas and vapor permeable preservative composition consisting of an aqueous solution or dispersion of a carboxylated hydrophilic acrylic copolymer containing monomer units from at least one C 1 -C 4 alkyl acrylate or methacrylate and from about 5% to about 20% by weight of at least one carboxylic monomer, a cross-linking agent for the carboxylated hydrophilic acrylic copolymer constituting from about 1.0 to about 10% by weight of the aqueous solution or dispersion and from about 0.1 to about 2.0% by weight of said aqueous solution or dispersion of an ultra-violet absorbing agent.
Claim 16
Dependent Claim
115 words
A porous inorganic substrate protected against damage by salt water, gaseous pollutants, graffiti, and erosion consisting of the substrate coated by a gas and vapor permeable preservative composition consisting of an aqueous solution or dispersion of a carboxylated hydrophilic acrylic copolymer containing monomer units from at least one C 1 -C 4 alkyl acrylate or methacrylate and from about 5% to about 20% by weight of at least one carboxylic monomer, a cross-linking agent for the carboxylated hydrophilic acrylic copolymer constituting from about 1.0 to about 10% by weight of the aqueous solution or dispersion and from about 0.1 to about 2.0% by weight of said aqueous solution or dispersion of an ultra-violet absorbing agent.
Claim 17
Dependent Claim
20 words
The porous inorganic substrate of claim 14, wherein the ultraviolet-absorbing agent absorbs from about 2,700 A° to about 3,300 A°.
Claim 18
Dependent Claim
46 words
The porous inorganic substrate of claim 14, wherein the composition also contains polyethylenimine or a hydrophilic polyethylenimine derivative and the carboxylated hydrophilic acrylic polymer and the polyethylenimine or hydrophilic polyethylenimine derivative constitute from about 10 to about 50% by weight of the aqueous solution or dispersion.
Claim 19
Dependent Claim
31 words
The porous inorganic substrate of claim 16, wherein the ratio of polyethylenimine or hydrophilic polyethylenimine derivative to said carboxylated hydrophilic acrylic polymer is from about 1:1 to about 10:1 by weight.
Claim 20
Dependent Claim
14 words
The porous inorganic substrate of claim 14, wherein the ultraviolet-absorbing agent is 2-ethoxyethyl p-methoxycinnamate.
Claim 21
Dependent Claim
44 words
The porous inorganic substrate of claim 14, wherein said carboxylated hydrophilic acrylic polymer is a copolymer containing monomer units from at least one C 1 -C 4 alkyl acrylate or methacrylate and from about 5 to about 20% by weight of acrylic acid monomer.
Claim 22
Dependent Claim
28 words
The porous inorgaic substrate of claim 14, wherein the cross-linking agent is selected from the group consisting of diglycidyl and triglycidyl ethers and low molecular weight epoxy resins.
Claim 23
Dependent Claim
26 words
The porous inorganic substrate of claim 14, wherein the cross-linking agent is selected from the group consisting of methylolated melamines and low molecular weight melamine-formaldehyde resins.
Claim 24
Dependent Claim
18 words
The porous inorganic substrate of claim 14, wherein the cross-linking agent is multivalent inorganic salt, oxide or hydroxide.
Claim 25
Dependent Claim
22 words
The porous inorganic substrate to claim 14, wherein the cross-linking agent is selected from zinc oxide, zinc carbonate and ammoniacal complexes thereof.
Claim 26
Dependent Claim
38 words
The porous inorganic substrate of claim 14, wherein said carboxylated hydrophilic acrylic copolymer is based on about 56% by weight of methyl methacrylate, about 30% by weight of ethyl methacrylate and about 14% by weight of acrylic acid.
Claim 27
Dependent Claim
37 words
The porous inorganic substrate of claim 14, wherein said carboxylated hydrophilic acrylic copolymer is based on about 44% by weight of butyl acrylate, 40% by weight of methyl acrylate and about 16% by weight of acrylic acid.
Claim 28
Dependent Claim
32 words
The porous inorganic substrate of claim 14, wherein said carboxylated hydrophilic acrylic copolymer is based on about 90% by weight of ethyl acrylate and about 10% by weight of acrylic acid units.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-09-19 | 1981-03-21 | 1981-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-19 | 1985-03-21 | 1985-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-19 | 1989-03-21 | 1989-09-20 | $7700.00 | Window Closed / Lapsed |