US4771097A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tub sizes for paper
Assignee: Bayer AG
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Filing: 1987-03-16
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Granted: 1988-09-13
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Expires: 2007-03-16
Abstract
Abstract Tub sizes for paper, containing aqueous or aqueous-alcoholic alkali metal, amine or ammonium salt solutions of copolymers of maleic anhydride and diisobutylene and, if appropriate, a vinyl monomer of the formula <IMAGE> in which R designates H, -CH3, -C2H5, -OR2, -OCOCH3, <IMAGE> -CH2OH or -CH2-O-COCH3, R1 designates H or -CH3 and R2 designates alkyl, the anhydride groups of the copolymers being bis-esterified to the extent of about 3 to about 20 mol %, relative to the anhydride groups, with aliphatic monoalcohols having 1 to 12 C atoms.
Inventors
- 👤 Gunter Sackmann
- 👤 Ulrich Beck
- 👤 Joachim Konig
- 👤 Heinz Baumgen
- 👤 Klaus-Dieter Albrecht
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:56
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/14; D; D21; D21H; D21H17/00; D21H17/20; D21H17/33; D21H17/34; D21H17/41; D21H17/42; D21H17/43; D21H21/00; D21H21/14; D21H21/16
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
55 words
A surface size for paper, containing aqueous or aqueous-alcoholic alkali metal, amine or ammonium salt solution of copolymers of maleic anhydride and diisobutylene, the anhydride groups of the copolymers being bis-esterified to the extent of about 3 to about 2 mol%, relative to the anhydride groups, with aliphatic monoalcohols having 1 to 12 C atoms.
Claim 2
Dependent Claim
55 words
A surface size for paper, containing aqueous or aqueous-alcoholic alkali metal, amine or ammonium salt solution of copolymers of maleic anhydride and diisobutylene, the anhydride groups of the copolymers being bis-esterified to the extent of about 3 to about 2 mol%, relative to the anhydride groups, with aliphatic monoalcohols having 1 to 12 C atoms.
Claim 3
Dependent Claim
31 words
A surface size according to claim 1, wherein the monoalcohol is selected from methanol, ethanol, n-propanol, isopropanol, isobutanol, sec.-butanol, n-pentanol, isoamyl alcohol, n-hexanol, cyclohexanol, n-octanol, n-dodecanol or 2-ethylhexanol or mixtures thereof.
Claim 4
Dependent Claim
12 words
A surface size according to claim 1, wherein the monoalcohol is n-butanol.
Claim 5
Dependent Claim
15 words
A surface size according to claim 1, wherein the size contains urea or urea derivative.
Claim 6
Dependent Claim
33 words
A surface size according to claim 1, wherein the size contains urea or a urea derivative which is N-monosubstituted or N-disubstituted by C 1 -C 4 -alkyl or C 1 -C 4 -hydroxyalkyl.
Claim 7
Dependent Claim
31 words
A surface size according to claim 1, wherein the size contains 10-200% by weight of urea or urea drivative, relative to the weight of the alkali metal, amine or ammonium salts.
Claim 8
Dependent Claim
30 words
A surface size according to claim 6, wherein the size contains 20-100% by weight of urea or urea derivative, relative to the weight of alkali, metal, amine or ammonium salts.
Claim 9
Dependent Claim
57 words
A surface size according to claim 1, which contains a vinyl monomer of the formula ##STR6## in which R represents H, --CH 3 , --C 2 H 5 , --OR 2 , --OCOCH 3 , ##STR7## --CH 2 OH or --CH 2 --O--COCH 3 ; R 1 represents H or --CH 3 and R 2 represents alkyl.
Claim 10
Dependent Claim
21 words
A surface size according to claim 8, wherein the vinyl monomer is isobutylene, styrene, α-methylstyrene, allyl alcohol or isobutyl vinyl ether.
Claim 11
Dependent Claim
32 words
A surface size according to claim 8, wherein the size contains, side by side, structural units ##STR8## wherein R 3 represents a linear, branched or cyclic C 1 -C 12 -hydrocarbon radical.
Claim 12
Dependent Claim
13 words
A surface size according to claim 9, wherein a molar ratio of (II):(III):(IV)=1:2-10:2-10.
References Cited (Backward Citations)
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 |