GB969666A - Hydrophilic particulate polyacrylamide and process of preparing - Google Patents

Hydrophilic particulate polyacrylamide and process of preparing

Info

Publication number
GB969666A
GB969666A GB7780/62A GB778062A GB969666A GB 969666 A GB969666 A GB 969666A GB 7780/62 A GB7780/62 A GB 7780/62A GB 778062 A GB778062 A GB 778062A GB 969666 A GB969666 A GB 969666A
Authority
GB
United Kingdom
Prior art keywords
polyacrylamide
water
alkanol
chromic
acrylamide
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB7780/62A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wyeth Holdings LLC
Original Assignee
American Cyanamid Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by American Cyanamid Co filed Critical American Cyanamid Co
Publication of GB969666A publication Critical patent/GB969666A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F20/00—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride, ester, amide, imide or nitrile thereof
    • C08F20/02—Monocarboxylic acids having less than ten carbon atoms, Derivatives thereof
    • C08F20/52—Amides or imides
    • C08F20/54—Amides, e.g. N,N-dimethylacrylamide or N-isopropylacrylamide
    • C08F20/56—Acrylamide; Methacrylamide
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F8/00—Chemical modification by after-treatment
    • C08F8/42—Introducing metal atoms or metal-containing groups
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F2800/00—Copolymer characterised by the proportions of the comonomers expressed
    • C08F2800/20—Copolymer characterised by the proportions of the comonomers expressed as weight or mass percentages

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)

Abstract

Hydrophilic particulate polyacrylamide having a combined acrylamide content of at least 85% by weight containing a hydrophilic polyacrylamide-chromic complex as a water-solubilizing agent is made by subjecting water-soluble monomeric material containing at least 85% of acrylamide to redox polymerization in aqueous medium in the presence of a small amount of a water-soluble chromic salt, until the monomer has polymerized to an alkanol-insoluble state, and precipitating the polymer in particulate form by addition of an alkanol. Alternatively, a similar product may be made by contacting polyacrylamide with an alkanol-water mixture containing a water-soluble chromic salt, until an effective amount of the salt has reacted with the polymer. Chromic salts specified are the chloride, acetate, sulphate and a tanning solution. Polymers specified are polyacrylamide, copolymer of acrylamide with acrylic acid, 2-vinyl pyridine diethylaminoethyl acrylate quaternized with methyl chloride, and trimethylvinyl phenyl ammonium chloride, and a copolymer containing 5% of vinylamine units.
GB7780/62A 1961-03-07 1962-02-28 Hydrophilic particulate polyacrylamide and process of preparing Expired GB969666A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US9386161A 1961-03-07 1961-03-07

Publications (1)

Publication Number Publication Date
GB969666A true GB969666A (en) 1964-09-16

Family

ID=22241299

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7780/62A Expired GB969666A (en) 1961-03-07 1962-02-28 Hydrophilic particulate polyacrylamide and process of preparing

Country Status (2)

Country Link
DE (1) DE1181911B (en)
GB (1) GB969666A (en)

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1050063B (en) * 1954-09-22 1959-02-05 Wacker-Chemie G.m.b.H., München Process for the production of water-insoluble nitrogen-containing polymers

Also Published As

Publication number Publication date
DE1181911B (en) 1964-11-19

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