US3890180A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coated paper
Assignee: Hoechst AG
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Filing: 1973-12-21
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Granted: 1975-06-17
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Expires: 1993-12-21
Abstract
Abstract This invention relates to a process for releasably covering a tacky or adhesive layer carried by an article which comprises covering the layer with a coated side of a one-side coated paper formed by application to paper of an aqueous dispersion, free from emulsifying agent, of a copolymer of ethylene and from 0.1 to 30 per cent, based on the weight of the solids content of the dispersion, of an alkali metal salt of a compound of the formula R1CH3C(R2)CONH-SO3H wherein R1 and R2 are hydrogen or an organic radical containing 1 to 10 carbon atoms.
Inventors
- 👤 Ludwig Grosse
- 👤 Hans Werner Dorr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:16
CPC Classifications
B; B32; B32B; B32B7/00; B32B7/04; B32B7/06; C; C09; C09D; C09D123/00; C09D123/02; C09D123/04; C09D123/08; B32B27/00; B32B27/06; B32B27/10; D; D21; D21H; D21H19/00; D21H19/10; D21H19/14; D21H19/20; D21H19/22; D21H27/00; D21H27/001; B32B2519/00; B32B2607/00; B32B2607/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
145 words
A PROCESS FOR RELEASABLY COVERING A TACKY OR ADHESIVE LAYER CARRIED BY AN ARTICLE WHICH COMPRISES COVERING THE LAYER WITH THE COATED SIDE OF A ONE-SIDE COATED PAPER FORMED BY APPLICATION TO PAPER OF AN AQUEOUS DISPERSION, FREE FROM EMULYSIFYING AGENT, OF A COPOLYMER OF A. 18 TO 99 PER BY WEIGHT OF ETHYLENE, B. 1 TO 7 PER CENT BY WEIGHT OF AN ALKALI METAL SALT OF A COMPOUND OF THE FORMULA R1CH3C(R2)CONH-SO3H WHEREIN R1 AND R2 ARE HYDROGEN OR A HYDROCARBON GROUP CONTAINING 1 TO 10 CARBON ATOMS, AND C. 0 TO 75 PER CENT BY WEIGHT OF AN A,B-UNSATURATED ACID ESTER PRESSURE IN THE RANGE OF 50 TO 2,500 AT MOSPHERES AND AT A PRESSURE TI THE RANGE OF 50 TO 2,500 ATMOSPHERES AND AT A TEMPERATURE IN THE RANGE OF 50* TO 250*C, IN THE PRESENCE OF A FREE RADICAL INITIATOR.
Claim 2
Dependent Claim
145 words
A PROCESS FOR RELEASABLY COVERING A TACKY OR ADHESIVE LAYER CARRIED BY AN ARTICLE WHICH COMPRISES COVERING THE LAYER WITH THE COATED SIDE OF A ONE-SIDE COATED PAPER FORMED BY APPLICATION TO PAPER OF AN AQUEOUS DISPERSION, FREE FROM EMULYSIFYING AGENT, OF A COPOLYMER OF A. 18 TO 99 PER BY WEIGHT OF ETHYLENE, B. 1 TO 7 PER CENT BY WEIGHT OF AN ALKALI METAL SALT OF A COMPOUND OF THE FORMULA R1CH3C(R2)CONH-SO3H WHEREIN R1 AND R2 ARE HYDROGEN OR A HYDROCARBON GROUP CONTAINING 1 TO 10 CARBON ATOMS, AND C. 0 TO 75 PER CENT BY WEIGHT OF AN A,B-UNSATURATED ACID ESTER PRESSURE IN THE RANGE OF 50 TO 2,500 AT MOSPHERES AND AT A PRESSURE TI THE RANGE OF 50 TO 2,500 ATMOSPHERES AND AT A TEMPERATURE IN THE RANGE OF 50* TO 250*C, IN THE PRESENCE OF A FREE RADICAL INITIATOR.
Claim 3
Dependent Claim
22 words
A process as claimed in claim 1 in which component b) of the copolymer is the dipotassium salt of methacrylic acid-amide-N-sulfonic acid.
Claim 4
Dependent Claim
31 words
A process as claimed in claim 1 in which component b) of the copolymer is the dipotassium salt of methacrylic acid-amide-N-sulfonic acid, and component c) of the copolymer is methyl methacrylate.
Claim 5
Dependent Claim
21 words
A process as claimed in claim 1 wherein the dispersion contains up to 30 per cent by weight of calcium stearate.
Claim 6
Dependent Claim
20 words
A process as claimed in claim 1 wherein the dispersion contains up to 30 per cent by weight of wax.
References Cited (Backward Citations)
US3689448A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-16 | 1978-12-16 | 1979-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-16 | 1982-12-16 | 1983-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-16 | 1986-12-16 | 1987-06-17 | $7700.00 | Window Closed / Lapsed |