Patent US4487861A successfully refreshed from Google Patents.
US4487861A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aqueous polymeric blends
Assignee: Akzo Nobel Paints LLC
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Filing: 1983-11-28
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Granted: 1984-12-11
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Expires: 2003-11-28
Abstract
Abstract A polymeric composition useful for interior coatings for beverage containers comprises a polymeric mixture of epoxy-acrylic copolymer and epoxy phosphate ester.
Inventors
- 👤 Peter P. Winner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:46
CPC Classifications
C; C08; C08F; C08F299/00; C08F299/02; C08F299/026
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
84 words
A water-dispersed coating composition comprising a polymeric mixture comprising on a polymer solids weight basis: between 20% and 80% epoxy-acrylic copolymer wherein said epoxy-acrylic copolymer is an epoxy-acrylic graft copolymer prepared by in-situ polymerization of ethylenically unsaturated monomers in the presence of epoxy or an epoxy-acrylic ester graft copolymer produced by esterifying carboxy functional polymer with an epoxy resin in the presence of amine catalyst; and between 20% and 80% epoxy phosphate ester containing between 0.05% and 5% by weight of coreacted phosphoric acid.
Claim 2
Dependent Claim
84 words
A water-dispersed coating composition comprising a polymeric mixture comprising on a polymer solids weight basis: between 20% and 80% epoxy-acrylic copolymer wherein said epoxy-acrylic copolymer is an epoxy-acrylic graft copolymer prepared by in-situ polymerization of ethylenically unsaturated monomers in the presence of epoxy or an epoxy-acrylic ester graft copolymer produced by esterifying carboxy functional polymer with an epoxy resin in the presence of amine catalyst; and between 20% and 80% epoxy phosphate ester containing between 0.05% and 5% by weight of coreacted phosphoric acid.
Claim 3
Dependent Claim
59 words
The composition in accordance with claim 1 wherein the epoxy-acrylic copolymer comprises a mixture of epoxy resin, epoxy-acrylic graft copolymer, and ungrafted addition polymer produced by in-situ polymerization of ethylenically unsaturated monomers including carboxyl monomer copolymerized in the presence of at least 3% by peroxide catalyst based on the weight of monomer and in the presence of epoxy resin.
Claim 4
Dependent Claim
23 words
The composition in accordance with claim 1 wherein the epoxy-acrylic copolymer comprises a preformed acrylic copolymer having carboxyl functionality esterified with epoxy resin.
Claim 5
Dependent Claim
41 words
The composition in accordance with claim 1 wherein the epoxy-acrylic copolymer comprises a preformed acrylic copolymer containing at least 20% copolymerized carboxyl monomer wherein said preformed acrylic copolymer was esterified with epoxy resin in the presence of at least 2% amine.
Claim 6
Dependent Claim
30 words
The composition in accordance with claim 1 wherein the epoxy phosphate portion of the epoxy-acrylic copolymer was derived from an epoxy resin having a molecular weight between 200 and 10,000.
Claim 7
Dependent Claim
28 words
The composition in accordance with claim 1 wherein the polymeric mixture comprises by weight between 35% and 64% epoxy-acrylic copolymer and between 35% and 65% epoxy phosphate ester.
Claim 8
Dependent Claim
18 words
The composition in accordance with claim 1 wherein the polymeric mixture contains between 1% and 10% aminoplast resin.
Claim 9
Dependent Claim
21 words
The composition in accordance with claim 1 wherein the epoxy phosphate contains between 0.1% and 3% by weight coreacted phosphoric acid.
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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) | 1987-12-11 | 1988-06-11 | 1988-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-12-11 | 1992-06-11 | 1992-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-12-11 | 1996-06-11 | 1996-12-11 | $7700.00 | Window Closed / Lapsed |