US3860563A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat hardenable film-forming copolymers which are soluble in organic solvents
Assignee: Reichhold Albert Chemie AG
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Filing: 1973-09-10
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Granted: 1975-01-14
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Expires: 1993-09-10
Abstract
Abstract It is a task of the present invention to produce, through special selection measures, film-forming copolymers of styrene, acrylic acid, N-alkoxyalkylmethacrylic acid amides and alkyl acrylates, which are soluble in organic solvents and which are suitable for the manufacture of improved stoving lacquers, preferably for the lacquering of thin plate, for instance tinplate sheet, iron sheet, aluminum sheet, which can be coiled up and can be shaped and punched by the converter, with the lacquering remaining undamaged even in stretched and punched areas (roller coating-, strip coating- and can coating process).
Inventors
- 👤 Themistoklis Katsimbas
- 👤 Horst Dalibor
- 👤 Hans-Joachim Kiessling
- 👤 Rolf Schmidt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:24
CPC Classifications
C; C08; C08F; C08F220/00; C08F220/02; C08F220/10; C08F220/12; C08F220/16; C08F220/18; C08F220/1804; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678; Y10T428/31692; Y10T428/31699
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
77 words
A composition as in claim 1 wherein the copolymer is the interpolymerization product of a. 34 to 36 percent by weight of styrene, b. 2 to 3 percent by weight of acrylic acid, c. 5 to 7 percent by weight of an ether of N-methylolmethacrylamide with n-butanol, d. 50 to 54 percent by weight of n-butyl acrylate, and e. 2 to 4 percent by weight of the ester of methacyclic acid (I), or mixtures of such esters.
Claim 2
Dependent Claim
83 words
Composition of claim 1 wherein the copolymer is the interpolymerization product of a. 35 to 36 percent by weight of styrene, b. 2.5 to 3 percent by weight of acrylic acid, c. 6 to 7 percent by weight of an ether of N-methylolmethacrylamide with n-butanol, d. 52 to 53 percent by weight of n-butyl acrylate, and e. 2 to 3 percent by weight of the ester oF methacrylic acid (I) or mixtures of such esters, having a hydroxyl number of 145 to 160.
Claim 3
Dependent Claim
93 words
Composition of claim 1 wherein the copolymer is the interpolymerization product of a. 35.5 percent by weight styrene, b. 2.9 percent by weight of acrylic acid, c. 6 percent by weight of an ether of n-butylolmethacrylamide with n-butanol, d. 52 percent by weight of n-butyl acrylate, and e. 2.4 percent by weight of the ester of methacylic acid with polypropylene glycol whereby the ester has a hydroxyl number of 145 to 160, a saponification number of 140 to 160 and a boiling point of 290* to 295*C at 760 mm of air pressure.
Claim 4
Dependent Claim
57 words
Composition in accordance with claim 1 wherein the ether component (c) of the copolymer is the reaction product of methacrylamide, paraformaldehyde and n-butanol wherein the molar ratios are from about 1 to about 1.5 mols of paraformaldehyde and 1 to 3 mols of n-butanol, relative to 1 mol of methacrylamide, and an acid or acid donating catalyst.
Claim 5
Dependent Claim
19 words
Composition in accordance with claim 1 wherein the N-methylolmethacrylamide/n-butanol ether component (c) contains maleic anhydride or its esterified product.
References Cited (Backward Citations)
US3453345A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-01-13 | 1978-07-15 | 1979-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-13 | 1982-07-15 | 1983-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-13 | 1986-07-15 | 1987-01-14 | $7700.00 | Window Closed / Lapsed |