US5296470A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Graft polysaccharides and their use as sequestering agents
Assignee: Rhodia Chimie SAS
•
Filing: 1991-06-26
•
Granted: 1994-03-22
•
Expires: 2011-06-26
Abstract
Abstract Graft polysaccharides comprising a polymer backbone consisting essentially of a polydextrose having an average-weight molecular mass of less than 10,000 and grafts grafted thereon derived from a water-soluble ethylenically unsaturated monomer. The graft polysaccharides are useful as sequestering agents for alkaline-earth metal ions.
Inventors
- 👤 Sophie Vaslin
- 👤 Christine Vidil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:24
CPC Classifications
C; C08; C08F; C08F251/00; C02; C02F; C02F5/00; C02F5/08; C02F5/10
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
59 words
Graft polysaccharides comprising: a polymer backbone consisting essentially of a polydextrose having an average-weight molecular mass of less than 10,000, and 20 to 70% by weight grafts derived from at least one water-soluble ethylenically unsaturated monomer, wherein said grafts are grafted onto said polymer backbone and said weight percent is based on the total weight of said polymer backbone.
Claim 2
Dependent Claim
59 words
Graft polysaccharides comprising: a polymer backbone consisting essentially of a polydextrose having an average-weight molecular mass of less than 10,000, and 20 to 70% by weight grafts derived from at least one water-soluble ethylenically unsaturated monomer, wherein said grafts are grafted onto said polymer backbone and said weight percent is based on the total weight of said polymer backbone.
Claim 3
Dependent Claim
31 words
Graft polysaccharides according to claim 1, wherein said polydextrose has an average-weight molecular mass of from 100 to 5,000, and wherein 25 to 35% by of weight said grafts are present.
Claim 4
Dependent Claim
18 words
Graft polysaccharides according to claim 1, wherein said grafts contain from 2 to 50 monomer units per graft.
Claim 5
Dependent Claim
54 words
Graft polysaccharides according to claim 1, wherein said water-soluble ethylenically unsaturated monomer is selected from the group consisting of an ethylenically unsaturated carboxylic monoacid, an ethylenically unsaturated carboxylic diacid, an ethylenically unsaturated carboxylic hydroxy acid, an ethylenically unsaturated sulphonic acid, an alkali metal or ammonium salt of these acids, and an ethylenically unsaturated alcohol.
Claim 6
Dependent Claim
59 words
Graft polysaccharides according to claim 4, wherein said water-soluble ethylenically unsaturated monomer is selected from the group consisting of acrylic acid, methacrylic acid, a mixture of acrylic or methacrylic acid as a monoacid and a maleic or itaconic acid as a diacid in a monoacid/diacid molar ratio of 50-95/50-5, and an alkali metal or ammonium salt of these acids.
Claim 7
Dependent Claim
63 words
A sequestering agent for cations comprising: a polymer backbone consisting essentially of a polydextrose having an average-weight molecular mass of less than 10,000, and 20 to 70% by weight of grafts derived from at least one water-soluble ethylenically unsaturated monomer, wherein said grafts are grafted onto said polymer backbone and said weight percent is based on the total weight of said polymer backbone.
Claim 8
Dependent Claim
63 words
A sequestering agent for cations comprising: a polymer backbone consisting essentially of a polydextrose having an average-weight molecular mass of less than 10,000, and 20 to 70% by weight of grafts derived from at least one water-soluble ethylenically unsaturated monomer, wherein said grafts are grafted onto said polymer backbone and said weight percent is based on the total weight of said polymer backbone.
Claim 9
Dependent Claim
64 words
A sequestering agent for alkaline-earth metal ions comprising: a polymer backbone consisting essentially of a polydextrose having an average-weight molecular mass of less than 10,000, and 20 to 70% by weight grafts derived from at least one water-soluble ethylenically unsaturated monomer, wherein said grafts are grafted onto said polymer backbone and said weight percent is based on the total weight of said polymer backbone.
Claim 10
Dependent Claim
64 words
A sequestering agent for alkaline-earth metal ions comprising: a polymer backbone consisting essentially of a polydextrose having an average-weight molecular mass of less than 10,000, and 20 to 70% by weight grafts derived from at least one water-soluble ethylenically unsaturated monomer, wherein said grafts are grafted onto said polymer backbone and said weight percent is based on the total weight of said polymer backbone.
Claim 11
Dependent Claim
21 words
Graft polysaccharides according to claim 1, wherein said polydextrose has an average-weight molecular mass of from 100 to less than 10,000.
Claim 12
Dependent Claim
18 words
Graft polysaccharides according to claim 1, wherein said grafts contain from 1 to 50 monomer units per graft.
Claim 13
Dependent Claim
22 words
A sequestering agent according to claim 6, wherein said polydextrose has an average-weight molecular mass of from 100 to less than 10,000.
Claim 14
Dependent Claim
19 words
A sequestering agent according to claim 6, wherein said grafts contain from 1 to 50 monomer units per graft.
Claim 15
Dependent Claim
22 words
A sequestering agent according to claim 7, wherein said polydextrose has an average-weight molecular mass of from 100 to less than 10,000.
Claim 16
Dependent Claim
19 words
A sequestering agent according to claim 7, wherein said grafts contain from 1 to 50 monomer units per graft.
References Cited (Backward Citations)
US3766165A
Cited
DE1937575A1
Cited
US3558499A
Cited
US3989656A
Cited
DE2330026A1
Cited
US4013607A
Cited
FR2277837A1
Cited
US4263180A
Cited
US4131576A
Cited
EP0025551A1
Cited
US4480025A
Cited
US4719272A
Cited
US4622233A
Cited
US4866151A
Cited
US4845035A
Cited
US5049634A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-03-21 | 1997-09-20 | 1998-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-03-21 | 2001-09-20 | 2002-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-03-21 | 2005-09-20 | 2006-03-22 | $7700.00 | Window Closed / Lapsed |