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Patent US4770713A successfully refreshed from Google Patents.
US4770713A
Expired / Lapsed
US
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Stripping compositions containing an alkylamide and an alkanolamine and use thereof
Assignee: Air Products and Chemicals Inc
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Filing: 1988-02-22
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Granted: 1988-09-13
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Expires: 2008-02-22
Abstract
Abstract Stripping compositions for removing paints, varnishes, enamels, photoresists and the like, from substrates comprising compositions of (a) an amide compound of the formula: ##STR1## and mixtures thereof wherein R is a member selected from the group consisting of methyl, ethyl and propyl; R 1 is a member selected from the group consisting of hydrogen, methyl, ethyl and propyl, and R 2 is a member selected from the group consisting of methyl, ethyl and propyl, and (b) an amine compound of the formula: R.sub.3 --NH--(CH.sub.2).sub.m --OH and mixtures thereof, wherein R 3 is a member selected from the group consisting of hydrogen, methyl, ethyl and propyl, and m is an integer of 1-4.
Inventors
- 👤 Irl E. Ward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:04
CPC Classifications
C; C09; C09D; C09D9/00; G; G03; G03F; G03F7/00; G03F7/26; G03F7/42; G03F7/422; G03F7/425
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
119 words
A stripping composition comprising a mixture of: (a) from about 85% to about 99% by weight of an amide compound of the formula: ##STR3## and mixtures thereof, wherein R is a member selected from the group consisting of methyl, ethyl and propyl; R 1 is selected from the group consisting of hydrogen, methyl, ethyl and propyl, and R 2 is a member selected from the group consisting of methyl, ethyl, and propyl; and (b) from about 1% to about 15% by weight an amine compound of the formula: R.sub.3 --NH--(CH.sub.2).sub.m --OH and mixtures thereof, wherein R 3 is a member selected from the group consisting of hydrogen, methyl, ethyl and propyl, and m is integer of 1 to 4.
Claim 2
Dependent Claim
119 words
A stripping composition comprising a mixture of: (a) from about 85% to about 99% by weight of an amide compound of the formula: ##STR3## and mixtures thereof, wherein R is a member selected from the group consisting of methyl, ethyl and propyl; R 1 is selected from the group consisting of hydrogen, methyl, ethyl and propyl, and R 2 is a member selected from the group consisting of methyl, ethyl, and propyl; and (b) from about 1% to about 15% by weight an amine compound of the formula: R.sub.3 --NH--(CH.sub.2).sub.m --OH and mixtures thereof, wherein R 3 is a member selected from the group consisting of hydrogen, methyl, ethyl and propyl, and m is integer of 1 to 4.
Claim 3
Dependent Claim
19 words
A stripping composition of claim 1 wherein the amide compound comprises from about 90 to about 96% by weight.
Claim 4
Dependent Claim
32 words
A stripping composition of claim 1 wherein the amide compound comprises from about 94 to about 99% by weight and the amine compound comprises from about 1 to about 6% by weight.
Claim 5
Dependent Claim
17 words
A stripping composition of claim 1 including up to about 2% by weight of a nonionic detergent.
Claim 6
Dependent Claim
12 words
A stripping composition of claim 1 wherein the amide compound is N,N-dimethylacetamide.
Claim 7
Dependent Claim
12 words
A stripping composition of claim 5 wherein the amide compound is monoethanolamine.
Claim 8
Dependent Claim
18 words
A stripping composition of claim 6 including about 0.1 to about 1% by weight of a nonionic surfactant.
Claim 9
Dependent Claim
27 words
A stripping composition of claim 3 wherein the amide component is dimethyl acetamide and the amine component is selected from the group consisting of monopropanolamine and monoethanolamine.
Claim 10
Dependent Claim
15 words
A stripping composition of claim 8 comprising about 99% dimethyl acetamide and about 1% diethanolamine.
Claim 11
Dependent Claim
15 words
A stripping composition of claim 8 comprising about 96% dimethyl acetamide and about 4% monoethanolamine.
Claim 12
Dependent Claim
51 words
A process for removing a coating from a coated substrate comprising applying to said coated substrate a stripping effective amount of a stripping composition of claim 1, permitting said stripping composition to reside on said coated substrate for a stripping effective period of time and removing the coating from the substrate.
Claim 13
Dependent Claim
51 words
A process for removing a coating from a coated substrate comprising applying to said coated substrate a stripping effective amount of a stripping composition of claim 2, permitting said stripping composition to reside on said coated substrate for a stripping effective period of time and removing the coating from the substrate.
Claim 14
Dependent Claim
51 words
A process for removing a coating from a coating substrate comprising applying to said coated substrate a stripping effective amount of a stripping composition of claim 3, permitting said stripping composition to reside on said coated substrate for a stripping effective period of time and removing the coating from the substrate.
Claim 15
Dependent Claim
51 words
A process for removing a coating from a coated substrate comprising applying to said coated substrate a stripping effective amount of a stripping composition of claim 4, permitting said stripping composition to reside on said coated substrate for a stripping effective period of time and removing the coating from the substrate.
Claim 16
Dependent Claim
51 words
A process for removing a coating from a coated substrate comprising applying to said coated substrate a stripping effective amount of a stripping composition of claim 5, permitting said stripping composition to reside on said coated substrate for a stripping effective period of time and removing the coating from the substrate.
Claim 17
Dependent Claim
51 words
A process for removing a coating from a coated substrate comprising applying to said coated substrate a stripping effective amount of a stripping composition of claim 6, permitting said stripping composition to reside on said coated substrate for a stripping effective period of time and removing the coating from the substrate.
Claim 18
Dependent Claim
51 words
A process for removing a coating from a coated substrate comprising applying to said coated substrate a stripping effective amount of a stripping composition of claim 7, permitting said stripping composition to reside on said coated substrate for a stripping effective period of time and removing the coating from the substrate.
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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) | 1991-09-13 | 1992-03-14 | 1992-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-13 | 1996-03-14 | 1996-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-13 | 2000-03-14 | 2000-09-13 | $7700.00 | Window Closed / Lapsed |