US3673148A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Abrasion resistant coating composition of an acrylic polymer, a polyester and a thermosetting constituent
Assignee: EIDP Inc
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Filing: 1971-05-20
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Granted: 1972-06-27
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Expires: 1991-05-20
Abstract
Abstract A coating composition that forms a high quality abrasion resistant finish for fiberglass reinforced plastic sinks and bathtubs contains as the binder 1. AN ACRYLIC GRAFT COPOLYMER HAVING ATTACHED TO ITS BACKBONE SIDE CHAIN ESTER UNITS CONTAINING REACTIVE HYDROXYL GROUPS; II. a polyester of two or more dicarboxylic acids or anhydrides, a glycidyl ester, a glycol and a triol; III. an alkylolated medium formaldehyde resin; and contains pigments in a pigment to binder ratio of 50:100 to 250:100 of a blend of a primer pigment such as titanium dioxide and an abrasive pigment of zirconium silicate.
Inventors
- 👤 Joseph A Vasta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:42
CPC Classifications
C; C09; C09D; C09D151/00; C09D151/003; C08; C08F; C08F291/00; C09D161/00; C09D161/20; C09D167/00; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31786; Y10T428/3179; Y10T428/31855; Y10T428/3188; Y10T428/31895; Y10T428/31906
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
25 words
about 9-25 percent, by equivalents, of a glycidyl ester having the formula wherein R3 is a tertiary hydrocarbon group having eight through 10 carbon atoms;
Claim 2
Dependent Claim
46 words
The coating composition of claim 1 having a binder content of 40-60 percent by weight and wherein the binder consists essentially of 40-50 percent by weight of the graft copolymer, 20-30 percent by weight of the polyester and 20-40 percent by weight of the melamine/formaldehyde resin.
Claim 3
Dependent Claim
79 words
The coating composition of claim 2 wherein the graft copolymer has a backbone consisting essentially of styrene and an acrylic ester selected from the group consisting of an alkyl methacrylate, an alkyl acrylate and mixture thereof in which the aLkyl group contains one to eight carbon atoms; in which R1 is a saturated hydrocarbon group having two to four carbon atoms, R2 is an aromatic radical, and R3 is a tertiary hydrocarbon group having eight through 10 carbon atoms.
Claim 4
Dependent Claim
26 words
about 5-27 percent, by equivalents, of a glycol selected from the group consisting of ethylene glycol, propylene glycol, 1,3-butane diol, 1,4-butane diol, and neopentyl glycol; and
Claim 5
Dependent Claim
21 words
about 23-28 percent, by equivalents, of a triol selected from the group consisting of trimethylol ethane, trimethylol propane, glycerine and pentaerythritol.
Claim 6
Dependent Claim
12 words
The coating composition of claim 3 wherein the polyester consists essentially of
Claim 7
Dependent Claim
22 words
The coating composition of claim 4 in which three-five of the -CH2OH groups of the melamine/formaldehyde resin have been reacted with methanol.
Claim 8
Dependent Claim
21 words
The coating composition of claim 5 in which the primer pigment is titanium dioxide and the abrasive pigment is zirconium silicate.
Claim 9
Dependent Claim
104 words
The coating composition of claim 2 wherein I. the graft copolymer has a backbone of styrene and methyl methacrylate and R1 is ethylene, R2 is phenylene and R3 is a tertiary aliphatic hydrocarbon group having eight through 10 carbon atoms; II. the polyester is the reaction product of maleic anhydride, orthophthalic anhydride, ethylene glycol, trimethylol propane and a glycidyl ester wherein R3 is defined as above; III. a melamine/formaldehyde resin having three-five of the -CH2OH groups reacted with methanol; and pigments in a pigment to binder ratio of about 150:100 wherein the primer pigment is titanium dioxide and the abrasive pigment is zirconium silicate.
Claim 10
Dependent Claim
29 words
A sheet material of a fiberglass reinforced plastic substrate having on at least one side about a 0.1-10 mil dried coalesced finish of the coating composition of claim 1.
Claim 11
Dependent Claim
20 words
The sheet material of claim 8 in which the plastic is a glycol phthalate, glycol maleate copolyester cross-linked with styrene.
Claim 12
Dependent Claim
53 words
A coating composition consisting essentially of 5-50 percent of a film forming binder in an organic solvent; wherein the binder consists essentially of I. 20-70 percent by weight of the graft copolymer of claim 1; II. 5-40 percent by weight of the polyester of claim 1; and III. 15-55 percent of urea/formaldehyde resin.
Claim 13
Dependent Claim
16 words
A paper substrate coated with about 0.1-1 mil of the dried coalesced composition of claim 10.
References Cited (Backward Citations)
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US3366706A
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US3376271A
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US3600459A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |