Abstract:
Methyl vinyl ether is copolymerized with a comonomeric compound of the formula: CH2=CHOR wherein R is phenyl or alkyl of from three to 30 carbon atoms, to give a copolymer containing from 20 to 85 weight percent of said comonomeric compound and having an inherent viscosity (0.1 percent solution in toluene) at 25* C. in the range of 0.6 to 2.0. The resulting copolymer is soluble in hydrocarbon lubricating oils and exhibits a unique combination of properties, such as viscosity index improver, thickener, good shear stability, good 0* F. properties, and as ashless dispersant for gums, resins and other oxidation products, present or formed, in the lubricating oil during the operation of combustion engines of various types.
Abstract:
Phenolic complexes of water-insoluble but water-swellable crosslinked N-vinyllactam or N-alkyl-N-vinylamide polymers in the form of porous beads or granules and a process of preparing same. The complexes are particularly suited for use in situations wherein phenolic materials in limited quantities are desired such as, for example, in canisters or columns which are used to treat liquids or water. The novel complexes are prepared by adsorbing a phenolic material onto the porous granular or porous bead-like crosslinked N-vinyllactam or N-alkyl-N-vinylamide polymers.
Abstract:
Iodine complexes can be prepared of water-insoluble but water swellable cross-linked N-vinyllactam or N-alkyl-N-vinylamide polymers in the form of porous beads or granules. Such complexes are suitable as bactericide and water treatment aids in gravity filtration systems or packed columns, such aids having the advantage of rapid throughput. The complexes are prepared by reacting the cross-linked particulate polymeric material with elemental iodine either by a dry blending or iodine and polymer solids or by mixing of the porous polymer with a solution of iodine.
Abstract:
Water soluble dialkylaminoethyl vinyl ether interpolymers of the formula
AND SALTS THEREOF WHEREIN R1 and R2 are each selected from the group consisting of methyl, ethyl, or hydroxyethyl or taken together with the N atom to which they are attached a heterocyclic ring, X and Y are selected from vinyl monomers copolymerizable with said other monomers and wherein the proportions of a, b, c and d of said monomer units in said interpolymer calculated on the basis of weight percent of the interpolymer amount to 80-10 weight percent of a, 70-10 weight percent of b, 30-0 weight percent of c, and 20-0 weight percent of d. The interpolymers of the invention are useful as flocculants and retention aids.
Abstract:
Beverages such as juices, vinegars, beers and wines are clarified and rendered haze-free by contacting the beverages with water-insoluble, water-swellable, crosslinked N-vinyllactam or Nalkyl-N-vinylamide polymers in the form of porous granules or beads. The granules or beads when spent are regenerated by an aqueous alkaline treatment.
Abstract:
A POROUS GRANULAR OR POROUS BEAD FORM OF A VINYLPYRROLIDONE POLYMR IS PRODUCED FROM A SUSPENSION OF MONOMERIC VINYL-PYRROLIDONE, OPTIONALLY WITH ADDITIONAL MONOMER OR MONOMERS, AND A CONTROLLED AMOUNT OF CROSSLINKING AGENT IN AN AQUEOUS SOLUTION OF AN ELECTOLYTE, THE SUSPENSION BEING MAINTAINED DURING POLYMERIZATION BY MECHANICAL MEANS. A FREE RADICAL POLYMERIZATION SOURCE IS UTILIZED. THE RESULTATN PRODUCT MAINTAINS ITS PARTICULATE FORM AFTER WETTING.