US4272297A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compositions for use with papermaking fillers
Assignee: Blue Circle Industries PLC
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Filing: 1979-09-19
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Granted: 1981-06-09
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Expires: 1999-09-19
Abstract
Abstract A composition for flocculating filler in aqueous suspension for use in papermaking, comprising a starch, an organic polyelectrolyte capable of flocculating mineral filler particles in aqueous suspension, and at least one agent capable of regulating the mobility of a dispersion, particularly a substance moderating flocculation of suspended filler or a substance moderating the viscosity of the dispersion.
Inventors
- 👤 Kenneth Brooks
- 👤 Leslie E. Shiel
- 👤 David E. Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:30
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/63; D21H17/67; D21H17/69; C; C08; C08L; C08L3/00; C08L3/02; D21F; D21F1/00; D21F1/66; D21F1/82
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
48 words
A composition for flocculating filler in aqueous suspension intended for use in a papermaking furnish, comprising: (a) at least one starch, (b) an organic polyelectrolyte capable of flocculating mineral filler particles in aqueous suspension, and (c) at least one agent capable of regulating the mobility of a dispersion.
Claim 2
Dependent Claim
48 words
A composition for flocculating filler in aqueous suspension intended for use in a papermaking furnish, comprising: (a) at least one starch, (b) an organic polyelectrolyte capable of flocculating mineral filler particles in aqueous suspension, and (c) at least one agent capable of regulating the mobility of a dispersion.
Claim 3
Dependent Claim
31 words
A composition according to claim 1, containing as an agent (c) substance effective to moderate the flocculation of a suspended filler and thereby maintain the mobility of a dispersion of filler.
Claim 4
Dependent Claim
28 words
A composition according to claim 1, or 2, containing as an agent (c) a substance effective to maintain the mobility of the polymer dispersion by moderating its viscosity.
Claim 5
Dependent Claim
10 words
A composition as claimed in claim 3, solubilised in water.
Claim 6
Dependent Claim
14 words
A composition according to claim 2, in the form of a dry solid mixture.
Claim 7
Dependent Claim
15 words
A composition according to claim 1, further comprising (d) a mineral filler in aqueous suspension.
Claim 8
Dependent Claim
13 words
A composition according to claim 6, wherein the mineral filler is calcium carbonate.
Claim 9
Dependent Claim
12 words
A composition according to claim 7, wherein the filler is chalk whiting.
Claim 10
Dependent Claim
20 words
A composition according to claim 1 wherein the starch is an anionic cold-water-soluble starch and the organic polyelectrolyte is cationic.
Claim 11
Dependent Claim
20 words
A composition according to claim 1, wherein the starch is a non-ionic cold-water-soluble starch and the organic polyelectrolyte is cationic.
Claim 12
Dependent Claim
30 words
A composition according to claim 2, wherein as a substance effective to moderate flocculation there is present a sodium polyphosphate, an alkali metal polyacrylate, polyvinyl pyrrolidone, dicyandiamide, or xanthan gum.
Claim 13
Dependent Claim
20 words
A composition according to claim 3, wherein as a substance effective to moderate viscosity there is present an inorganic electrolyte.
Claim 14
Dependent Claim
12 words
A composition according to claim 12, wherein the inorganic electrolyte is alum.
Claim 15
Dependent Claim
14 words
A composition according to claim 1 further comprising a cross-linking agent for the starch.
Claim 16
Dependent Claim
13 words
A composition according to claim 1 further comprising a dry-strength additive for paper.
Claim 17
Dependent Claim
30 words
A method of preparing a pre-flocculated filler for use in a papermaking furnish which comprises introducing a composition as claimed in claim 5 into an aqueous slurry of the filler.
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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) | 1984-06-08 | 1984-12-08 | 1985-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-06-08 | 1988-12-08 | 1989-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-06-08 | 1992-12-08 | 1993-06-09 | $7700.00 | Window Closed / Lapsed |