§
PatentCue
Patent Intelligence
Join Waitlist Sign In
Patent US4617362A successfully refreshed from Google Patents.
← Back to Patent Explorer
US4617362A Expired / Lapsed US ⏱️ 0.0 years remaining

Inverse emulsion polymers with improved incorporation of diallyldimethylammonium chloride

Assignee: SNF SA
•
Filing: 1985-05-16
•
Granted: 1986-10-14
•
Expires: 2005-05-16
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract The present invention provides a process for improved incorporation of diallyldimethylammonium chloride (DADMAC) into an acrylamide polymer. This invention makes use of a copolymerizable promoter monomer. Also provided by the present invention are inverse emulsion terpolymers of diallyldimethylammonium chloride. The improved incorporation resides in the use of a promoter monomer that is more reactive with acrylamide than is the DADMAC monomer and is selected from <IMAGE> wherein R is -H or CH3; X is -O-, or -NH-; n has a value of 2-4; and A is an ion selected from the group consisting of Cl -, CH3SO4-, HSO4- and NO3-. Specific monomers within this formula included, for example, 2-methacryloylethyltrimethylammonium chloride and 2-acryloylethyltrimethylammonium chloride. Typical of such promoter monomers are 2-methacryloylethyl trimethyl ammonium chloride and 2-acryloylethyl trimethyl ammonium chloride.

Inventors

  • 👤 Larry W. Becker
  • 👤 Eric H. Larson

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-02 10:07
CPC Classifications
C; C08; C08F; C08F220/00; C08F220/02; C08F220/52; C08F220/54; C08F220/56

Claims Analysis

Total Claims: 8
Claim 1
Independent Claim 129 words
A process for enhancing the incorporation of diallyldimethylammonium chloride into an acrylamide polymer, said process comprising forming a polymerizable mixture in an aqueous system of diallyldimethylammonium chloride and acrylamide in the presence of emulsifiers, introducing into the polymerizable mixture a polymerizable promoter monomer having a higher reactivity with acrylamide than diallyldimethylammonium chloride, and polymerizing said promoter containing polymerizable mixture, said polymerizable promoter monomer being present in an amount sufficient to provide improved incorporation of diallyldimethylammonium chloride into the acrylamide polymer and being ##STR4## wherein R is --H or CH 3 ; X is --O--, or --NH--; n has a value of 2-4; and A is an ion selected from the group consisting of Cl - , CH 3 SO 4 - HSO 4 - and NO 3 - .
Claim 2
Dependent Claim 129 words
A process for enhancing the incorporation of diallyldimethylammonium chloride into an acrylamide polymer, said process comprising forming a polymerizable mixture in an aqueous system of diallyldimethylammonium chloride and acrylamide in the presence of emulsifiers, introducing into the polymerizable mixture a polymerizable promoter monomer having a higher reactivity with acrylamide than diallyldimethylammonium chloride, and polymerizing said promoter containing polymerizable mixture, said polymerizable promoter monomer being present in an amount sufficient to provide improved incorporation of diallyldimethylammonium chloride into the acrylamide polymer and being ##STR4## wherein R is --H or CH 3 ; X is --O--, or --NH--; n has a value of 2-4; and A is an ion selected from the group consisting of Cl - , CH 3 SO 4 - HSO 4 - and NO 3 - .
Claim 3
Dependent Claim 12 words
The process of claim 1 wherein said promoter monomer comprises 2-methacryloylmethyltrimethylammonium chloride.
Claim 4
Dependent Claim 12 words
The process of claim 1, wherein said promoter monomer comprises 2-acryloylethyltrimethylammonium chloride.
Claim 5
Dependent Claim 21 words
The process of claim 1, wherein the polymerization is carried out at a temperature in the range of about 35°-55° C.
Claim 6
Dependent Claim 16 words
The process of claim 4, wherein said temperature is in the range of about 40°-45° C.
Claim 7
Dependent Claim 13 words
The process of claim 1, wherein the polymerization is effected in an emulsion.
Claim 8
Dependent Claim 31 words
The process of claim 6, wherein emulsifiers employed in the system are a mixture of sorbitan monooleate and ethoxylated 12-hydroxystearic acid, and a mixture of sorbitan trioleate and ethoxylated 12-hydroxystearic acid.

References Cited (Backward Citations)

US3284393A Cited
US3767629A Cited
US4396752A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1989-10-13 1990-04-14 1990-10-14 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1993-10-13 1994-04-14 1994-10-14 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1997-10-13 1998-04-14 1998-10-14 $7700.00 Window Closed / Lapsed

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag