Patent US4298513A successfully refreshed from Google Patents.
US4298513A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Binder for paper-coating compositions
Assignee: BASF SE
•
Filing: 1980-09-15
•
Granted: 1981-11-03
•
Expires: 2000-09-15
Abstract
Abstract A low-odor aqueous binder dispersion containing as copolymerized units, and based on solids content, (a) from 25 to 57.5% by weight of butadiene or of butadiene and an acrylic acid ester, the content of copolymerized butadiene being not less than 15% by weight, (b) from 40 to 70% by weight of styrene, (c) from 1 to 5% by weight of maleic acid or maleic anhydride and (d) from 1.5 to 7% by weight of methacrylamide, for use in paper-coating compositions.
Inventors
- 👤 Dieter Distler
- 👤 Margarete Mueller
- 👤 Hans-Georg Bubam
- 👤 Guenther Addicks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:35
CPC Classifications
D; D21; D21H; D21H19/00; D21H19/36; D21H19/44; D21H19/56; D21H19/58; C; C08; C08F; C08F212/00; C08F212/02; C08F212/04; C08F212/06; C08F212/08; C08F236/00; C08F236/02; C08F236/04; C08F236/06
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
85 words
An aqueous dispersion of a butadiene-styrene copolymer which comprises: (a) from 25 to 57.5% by weight of a mixture of butadiene and copolymerized units of an acrylic acid ester of an alcohol of 1 to 4 carbon atoms, said mixture not being less than 15% by weight of butadiene units, (b) from 40 to 70% by weight of styrene, (c) from 1 to 5% by weight of maleic acid or maleic anhydride and (d) from 1.5 to 7% by weight of methacrylamide, as copolymerized units.
Claim 2
Dependent Claim
85 words
An aqueous dispersion of a butadiene-styrene copolymer which comprises: (a) from 25 to 57.5% by weight of a mixture of butadiene and copolymerized units of an acrylic acid ester of an alcohol of 1 to 4 carbon atoms, said mixture not being less than 15% by weight of butadiene units, (b) from 40 to 70% by weight of styrene, (c) from 1 to 5% by weight of maleic acid or maleic anhydride and (d) from 1.5 to 7% by weight of methacrylamide, as copolymerized units.
Claim 3
Dependent Claim
71 words
A binder dispersion as claimed in claim 1, which contains, as an auxiliary, from 2 to 50% by weight, expressed as solids/solids, of a copolymer which acts as a thickener and contains, as copolymerized units, from 15 to 55% by weight of acrylic acid or methacrylic acid, from 0 to 10% by weight of acrylamide or methacrylamide and from 85 to 45% by weight of hydrophobic monomers which form water-insoluble homopolymers.
Claim 4
Dependent Claim
11 words
Paper coated with the aqueous dispersions of claims 1 or 2.
Claim 5
Dependent Claim
27 words
The aqueous dispersion according to claims 1 or 2 further comprising 0.3 to 3 parts by weight of natural binders per part by weight of synthetic binder.
Claim 6
Dependent Claim
14 words
The aqueous dispersion of claim 4 wherein said natural binders are casein or starch.
Claim 7
Dependent Claim
27 words
The aqueous dispersion according to claims 1 or 2 further comprising 100 parts of a pigment per 5 to 25 parts by weight of said butadiene-styrene copolymer.
Claim 8
Dependent Claim
21 words
The aqueous dispersion according to claim 6 wherein said pigments are clay minerals, calcium carbonates, calcium aluminum pigments or titanium dioxide.
Claim 9
Independent Claim
18 words
A method for treating paper comprising coating said paper with the aqueous dispersion of claims 1 or 2.
Claim 10
Dependent Claim
12 words
The aqueous dispersion of claim 1 wherein the ester is n-butyl acrylate.
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) | 1984-11-02 | 1985-05-04 | 1985-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-02 | 1989-05-04 | 1989-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-02 | 1993-05-04 | 1993-11-03 | $7700.00 | Window Closed / Lapsed |