Abstract:
N-3-Hydroxyalkyl acrylamides, and substituted derivatives thereof, are prepared by (1) reduction of an N-3-oxohydrocarbonsubstituted acrylamide, (2) addition of an alcohol to the N-3oxohydrocarbon-substituted acrylamide, followed by hydrogenation of the carbonyl group and elimination of the alcohol, or (3) hydrolysis of a 2-vinyl-5,6-dihydro-1,3-oxazine. The acrylamides are useful as monomers for conversion to polymers (which may also be prepared by reduction of the corresponding oxohydrocarbonsubstituted acrylamide polymers) with a number of interesting properties, including utility as membranes for desalination of water by hyperfiltration. The polymers may be crosslinked by the action of such reagents as diisocyanates, dicarboxylic acid halides, and aldehydes in acidic solution.
Abstract:
N-3-Aminoalkyl propionamides with an ether substituent on the beta carbon atom are prepared by the reaction of analogous N-3oxohydrocarbon-substituted amides with an amine in the presence of a reducing agent, preferably hydrogen and a hydrogenation catalyst. The resulting compounds can be converted to acrylamides by pyrolysis in the presence of a strong base. The latter compounds may also be prepared by the reaction of a Beta , gamma -unsaturated amine with an acrylonitrile in the presence of sulfuric acid. They are useful for improving dyeability of fiberforming polymers and may be polymerized to form compositions which are useful in paper manufacture and (in their quaternized form) are excellent flocculants.
Abstract:
N-3-Aminoalkyl propionamides with an ether substituent on the beta carbon atom are prepared by the reaction of analogous N-3oxohydrocarbon-substituted amides with an amine in the presence of a reducing agent, preferably hydrogen and a hydrogenation catalyst. The resulting compounds can be converted to acrylamides by pyrolysis in the presence of a strong base. The latter compounds may also be prepared by the reaction of an Alpha , Beta -unsaturated amine with an acrylonitrile in the presence of sulfuric acid. They are useful for improving dyeability of fiberforming polymers and may be polymerized to form compositions which improve paper strength and (in their quaternized form) are excellent flocculants.
Abstract:
POLYMERS OF ACRYLAMIDO SULFONIC ACIDS AND THEIR SALTS, ESPECIALLY 2-ACRYLAMIDO-2-METHYLPROPANESULFONIC ACID AND ITS SALTS, ARE USEFUL AS FLOCCULANTS FOR AQUEOUS SYSTEMS, ESPECIALLY IN COMBINATION WITH INORGANIC CO-FLOCCULANTS.
Abstract:
Halogenation of N-3-oxohydrocarbon-substituted acrylamides, such as diacetone acrylamide, produces the corresponding substituted 2,3-dihalopropionamides. These can in turn be dehydrohalogenated to give the corresponding substituted 2-haloacrylamides. The latter compounds may also be prepared by the reaction of two moles of an aldehyde or ketone, or one mole of a Beta -hydroxy aldehyde or ketone or an Alpha , Beta -unsubstituted aldehyde or ketone, with 2-chloroacrylonitrile in the presence of sulfuric acid. The substituted 2-chloroacrylamides are useful as monomers for the preparation of fire-resistant polymers.
Abstract:
(Co)polymers are derived from substd. (meth)acrylamides of formula (I): (where R', R2 and R3 are H or hydrocarbon, and R4 and R5 are hydrocarbons, R6 is -C(R7)=CH2 where R7 is H or lower alkyl, and R8 (sic) is hydrocarbon, Y is -NZ'Z2 or - circled positive NZ'Z2Z3X circled negative X is a salt-forming anion, Z' is H or hydrocarbon, and Z2 is H or (cyclo)alkyl, or -NZ'Z2 may be a heterocycle, and Z3 is H or lower alkyl), e.g. N-(1,1-dimethyl-3-dimethylaminopropyl)acrylamide.
Abstract:
1380807 Flocculating LUBRIZOL CORP 8 Feb 1972 [12 Feb 1971] 5862/72 Heading C1C Solids in aqueous suspension (e.g. kaolin suspensions or sewage) are flocculated by adding thereto a water-soluble polymer or copolymer containing units of the formula wherein R = H, lower (up to 7 C atoms) alkyl or substituted lower alkyl, R 3 = H or lower alkyl ; R 4 = lower alkyl; M = H or one equivalent of a cation (e.g. Na, K, NH 4 ). An inorganic flocculant, e.g. Fe 2 (SO 4 ) 3 , Al 2 (SO 4 ) 3 or Ca(OH) 2 may be added. The copolymer may comprise acrylic acid, methacrylic acid, methacrylamide, N- methylacrylamide, or N-(1,1-dimethyl-3-dimethylaminobutyl) acrylamide. The copolymer may be quaternized. The substituted radical may include halide, hydroxy, alkoxy, keto, carboxy, carbalkoxy, amide, amino, nitro, cyano, hydrocarbylthio, sulphoxy, sulphone and sulphonic acid and amide groups.