Patents Represented by Attorney L. E. Johnson
  • Patent number: 4429097
    Abstract: There are disclosed polymerizable alkyl poly(oxyalkylene) esters of an acrylate oligomer and copolymers thereof, especially stable, aqueous dispersions of water-insoluble emulsion copolymers of (1) about 10-70% by weight of methacrylic or acrylic acid, (2) about 0.5-25% by weight of an alkyl poly(oxyalkylene) ester of an acrylate oligomer, and (3) at least 25% by weight, to a total of 100%, of a C.sub.1 -C.sub.4 alkyl (meth)acrylate, and optionally, included in the total monomer mixture, a small amount of (4) about 0.5-1% by weight, of a polyethylenically unsaturated monomer. The copolymers, when neutralized and solubilized by addition of an alkali, are high efficiency thickeners for aqueous systems and have improved tolerance to ionic or electrolyte content. Typical systems that can be thickened are paint latices, cosmetic preparations, food preparations, ionic detergents, dye pastes for textiles, pharmaceuticals, and oil well drilling muds.
    Type: Grant
    Filed: September 16, 1982
    Date of Patent: January 31, 1984
    Assignee: Rohm and Haas Company
    Inventors: Ching-Jen Chang, Travis E. Stevens
  • Patent number: 4400413
    Abstract: There are disclosed polymer concrete compositions of essentially anhydrous character comprising (1) an inert inorganic particulate material, such as sand, crushed stone or rock, and mixtures thereof, mixed with (2) a monomer blend of (a) dicyclopentenyloxyalkyl methacrylate or acrylate and (b) hydroxyalkyl methacrylate to form a paste or slurry suitable upon addition thereto of (3) a polymerization catalyst of (a) an organic peroxide and an aromatic amine accelerator, or (b) a polyvalent metal salt or complex and an organic hydroperoxide, or (c) mixtures of (a) and 0.0005% to 2% by weight, based on total amount of monomers, of a polyvalent metal salt or complex, or (d) mixtures of (a) and (b), to be used to form or to patch previously formed or laid, concrete floors and road pavements or as a coating for a variety of substrates such as metal and plastic sheet.
    Type: Grant
    Filed: July 16, 1981
    Date of Patent: August 23, 1983
    Assignee: Rohm and Haas Company
    Inventors: William D. Emmons, Joseph A. Lavelle
  • Patent number: 4082564
    Abstract: Crosslinked macroreticular and gel-type quaternary ammonium acrylamide anion exchange resins which possess a potential for hydrophobic bonding and thereby display a high affinity for slightly ionized or unionized refractory color bodies as well as for the more easily removed color bodies in aqueous sugar solutions are provided.
    Type: Grant
    Filed: March 23, 1977
    Date of Patent: April 4, 1978
    Assignee: Rohm and Haas Company
    Inventors: William Fries, Silvia Napierski
  • Patent number: 4082701
    Abstract: Crosslinked macroreticular and gel-type quaternary ammonium acrylamide anion exchange resins which possess a potential for hydrophobic bonding and thereby display a high affinity for slightly ionized or unionized refractory color bodies as well as for the more easily removed color bodies in aqueous sugar solutions are provided.
    Type: Grant
    Filed: May 13, 1977
    Date of Patent: April 4, 1978
    Assignee: Rohm and Haas Company
    Inventors: William Fries, Silvia Napierski