US4954538A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Micro-emulsified glyoxalated acrylamide polymers
Assignee: CYTEC
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Filing: 1988-12-19
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Granted: 1990-09-04
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Expires: 2008-12-19
Abstract
Abstract Compositions comprising microparticles of a cross-linkable, glyoxalated (meth) acrylamide containing, polymeric material are disclosed. They are prepared using inverse microemulsion polymerization techniques and are useful as wet- and dry-strength agents in paper production.
Inventors
- 👤 David L. Dauplaise
- 👤 Joseph J. Kozakiewicz
- 👤 Joseph M. Schmitt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:28
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/28; C08F2810/00; C08F2810/20
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
52 words
A composition comprising microparticles of a glyoxylated (meth)acrylamide-containing polymeric material having (1) sufficient glyoxal-reactive amide substituents and --CHOHCHO substituents to continually self cross-link said material at ambient conditions, said --CHOHCHO substituents being present in a excess of about 0.5 weight percent and (2) diameters ranging from about 200 to about 3000 Å.
Claim 2
Dependent Claim
52 words
A composition comprising microparticles of a glyoxylated (meth)acrylamide-containing polymeric material having (1) sufficient glyoxal-reactive amide substituents and --CHOHCHO substituents to continually self cross-link said material at ambient conditions, said --CHOHCHO substituents being present in a excess of about 0.5 weight percent and (2) diameters ranging from about 200 to about 3000 Å.
Claim 3
Dependent Claim
20 words
A composition as defined in claim 1 wherein said --CHOHCHO substituents are present in excess of about 1.0 weight percent.
Claim 4
Dependent Claim
20 words
A composition as defined in claim 2 wherein said --CHOHCHO substituents are present in excess of about 5.0 weight percent.
Claim 5
Dependent Claim
18 words
A composition as defined in claim 1 wherein said diameters range from about 300 to about 2000 Å.
Claim 6
Dependent Claim
18 words
A composition as defined in claim 1 wherein said diameters range from about 350 to about 1000 Å.
Claim 7
Dependent Claim
24 words
A composition as defined in claim 1 wherein said polymeric material is a copolymer of a (meth) acrylamide and a cationic monomer copolymerizable therewith.
Claim 8
Dependent Claim
27 words
A composition as defined in claim 6 wherein said cationic comonomer comprises a diallyl dialkylammonium chloride, an N,N-dialkylaminoalkyl (meth)acrylate; an N,N-dialkylaminoalkyl(meth)acrylamide and salts quaternaries or mixtures thereof.
Claim 9
Dependent Claim
23 words
A composition as defined in claim 1 wherein said (meth)acrylamide monomer comprises acrylamide; methacrylamide; an N-alkyl acrylamide, an N-alkyl methacrylamide or mixtures thereof.
Claim 10
Dependent Claim
20 words
A composition as defined in claim 1 wherein said (meth)acrylamide polymer comprises a copolymer of acrylamide and a diallyldialkylammonium chloride.
References Cited (Backward Citations)
US4172066A
Cited
US4681912A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-09-03 | 1994-03-05 | 1994-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-09-03 | 1998-03-05 | 1998-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-09-03 | 2002-03-05 | 2002-09-04 | $7700.00 | Window Closed / Lapsed |