Abstract: Filament reinforced phenolic resin products are provided which comprise a plurality of filaments and a cured, normally liquid phenolic resin interspersed around the filaments. The filaments can be in the form of continuous fibers, roving, woven roving, cloth and mat. The products are useful in structural applications. Also disclosed are novel glycol-modified resole phenolic resins and oligomeric polyol-modified resole phenolic resins.
Abstract: A new class of polymer/polyols based on the condensation polymerization of an oxalate ester and a diamine directly in a polyether polyol. The resultant polyoxamate/polyols have viscosities ranging from 1,500 to 15,000 cps. These polyoxamate/polyols are useful in the preparation of urethane elastomers and high resilience foams.
Abstract: A polyol gel is made from 15-62 wt. % (based on the sum of polyurethane matrix plus dispersing agent) of a high molecular weight covalently cross-linked polyurethane matrix; 85-38 wt. % (based on the sum of polyurethane matrix plus dispersing agent) of a liquid dispersing agent which is firmly bonded to the matrix; and optionally, active ingredients, fillers, additives, catalysts, and mixtures thereof. The liquid dispersing agent is a polyhydroxyl compound having a molecular weight of between 1,000 and 12,000 and an OH number between 20 and 112. This dispersing agent should have virtually no hydroxyl compounds having a molecular weight below 800 present. These gel compositions may be used to make mold impressions and highly stable active-ingredient releasing compositions.
Abstract: A stable copolymer dispersion is prepared by addition copolymerization of (1) an adduct of an active hydrogen compound, e.g., a polyether polyol, and an active ethylenically unsaturated isocyanate, e. g., 2-isocyanatoethyl methacrylate with (2) ethylenically unsaturated monomers(s), e.g., styrene or mixture thereof with acrylonitrile, while (1) and (2) are dispersed or dissolved in an excess of an active hydrogen polyfunctional compound. The resulting dispersion has a controlled particle size and a viscosity such that it is suitably employed in the production of polyurethane foams.
November 23, 1979
Date of Patent:
June 28, 1983
The Dow Chemical Company
Dwight K. Hoffman, Robert F. Harris, Nancy B. Tefertiller, Randall C. Rains
Abstract: A polymer-modified polyol is formed by polymerizing an olamine, particularly an alkanolamine, with an organic polyisocyanate in the presence of a polyol. The alkanolamine reacts polyfunctionally with the polyisocyanate to produce polyaddition products.The polyaddition products may constitute a stable dispersion in the polyol and the resulting polymer-modified polyol is particularly useful as a polyol starting material for reaction with a polyisocyanate in the manufacture of polyurethane foam.
Abstract: A sizing composition and method of preparing sized glass fiber strand is provided to produce sized glass fiber strand that has reduced tackiness. The sizing composition has a low molecular weight liquid polymer selected from the group consisting of styrene-butadiene copolymer, acrylonitrile-butadiene copolymer or hydroxy or carboxy derivatives of said copolymers, epoxy resins, polyester resins, or polyurethane resins that are free radically curable; and a free radical precurser selected from the group consisting of peroxides, hydroperoxides in an amount in the range of about 0.2 to 5 parts per hundred parts of liquid polymer in said sizing composition; or the said liquid polymer that can be treated with radiation to produce an equivalent amount of free radicals.
Abstract: Polytetrafluoroethylene dispersions obtained from dispersion polymerization which have high solids content and small polytetrafluoroethylene particles are obtained by employing a combination of disuccinic acid peroxide and an inorganic persulfate, and a combination of an anionic and a hydrocarbon dispersing agent, precharged to the polymerization mixture, and by adding a combination of disuccinic acid peroxide and an anionic dispersing agent during the course of the polymerization.
Abstract: Novel polymer/polyisocyanate compositions made by polymerizing at least one ethylenically unsaturated monomer in situ in a blend of a first organic polyisocyanate and a stabilizer. The stabilizer comprises a polyoxyalkylene polyol having a number average molecular weight of at least 4000; an isocyanato terminated prepolymer formed by reacting the polyoxyalkylene polyol and a second organic polyisocyanate with the proviso that the isocyanato terminated prepolymer and the first organic polyisocyanate provide greater than 25 equivalents of isocyanato groups per equivalent of hydroxyl groups; a polymer/polyol formed using the polyoxyalkylene polyol; a polymer/prepolymer formed using the polyoxyalkylene polyol with the proviso indicated for the prepolymer above; or a modified polyol containing an ester group formed using the polyoxyalkylene polyol.
Abstract: A composition which possesses both good lubrication and release properties for use in the manufacture of molded rubber articles which comprises a mixture of a hardenable silicone resin and an oil, the oil having the property of not dissolving or swelling rubber, the weight ratio of resin to oil being from 5:1 to 1:20.
Abstract: This invention relates to solutions of polyisocyanate polyaddition products with a solids content of from 5 to 70% by weight ofA. Reaction products of(a) polyisocyanates,(b) hydrazines and/or polyamines and/or dihydrazides and/or ammonia and/or urea and/or low molecular weight polyols,(c) optionally higher molecular weight polyols and(d) optionally formaldehyde inB. polyhydric alcohols having a molecular weight of between 62 and 450.
Abstract: Sterically stabilized aqueous polymer dispersions of at least 20% solids content are made by free radical-initiated polymerization of monomers in an aqueous medium at a temperature at least 10.degree. C. higher than the glass transition temperature of the polymer to be formed, in the presence of a compound which is soluble in the aqueous medium and contains in the molecule a polymeric component of molecular weight at least 1000 which is solvatable by the aqueous medium and an unsaturated grouping which can copolymerize with the monomers, the conditions being such that there is at no time present a separate monomer phase. The dispersions are useful as a basis of improved coating compositions.
December 7, 1979
Date of Patent:
March 30, 1982
Imperial Chemical Industries Limited, Dulux Australia Limited