Abstract: The preparation of dialkyltin dihalides and mixed dialkyltin dihalides, by refluxing a dimethyltin dihalide with a higher alkyl-halide in the presence of a phosphonium iodide catalyst, useful as intermediates for PVC stabilizers.
Type:
Grant
Filed:
June 21, 1976
Date of Patent:
October 4, 1977
Assignee:
Witco Chemical Corporation
Inventors:
William E. Leistner, Gerald H. Spiegelman, Louis J. Hover
Abstract: Textile adhesive compositions. More particularly, aqueous adhesive compositions comprising a plasticizing agent and a dispersed polyurethane polymer, the method of using the adhesive composition in textile applications and the textile materials thus obtained.
Abstract: Used oil, such as automotive crankcase oil drainings from internal combustion engines, are pretreated by heating to above about 400.degree.-800.degree. F, and preferably between 600.degree.-750.degree. F, while an essentially liquid phase system is maintained at a pressure of between 500-3500 p.s.i.g., preferably between 2000-3500 p.s.i.g., for between 15-60 minutes, the contact time being even shorter at higher temperatures. A sludge which contains contaminants, such as insoluble degradation products, metallic compounds, and water, is separated preferably by centrifugation, leaving a substantially ashless oil ready for additional refinement to a high quality lubricating oil, or it may be used, per se, as a fuel oil.
Type:
Grant
Filed:
April 24, 1975
Date of Patent:
July 5, 1977
Assignee:
Witco Chemical Corporation
Inventors:
Donald Douglas Davidson, Bjorn I. Engesvik
Abstract: A lead-free rigid polyurethane foam which cures rapidly at low temperatures and which comprises an organic isocyanate, a polyol, a catalyst, a foaming agent, a cell-size regulator and a primary polyoxyalkylene amine.
Abstract: The marked dusting characteristics of dry powder alkali-metal salts of alpha-olefin sulfonates are substantially inhibited by incorporating therein minor proportions of alkanolamine salts of alpha-olefin sulfonates.
Abstract: Amine-terminated polyetherurethane-urea polymers in a solvent, as for instance, isopropanol, toluene, and mixtures thereof, are chain-extended with as little as about 0.1 and up to 9 percent, by weight, based on the amine terminated polyetherurethane-urea, of a polyepoxide, such as a polyepoxide of p,p'-isopropylidenediphenol, of a phenolformaldehyde resin, epoxidized soybean oil, diglycidyl phthalate, and the like, to produce films, coatings, adhesives, and caulking having improved hydrolytic stability, and other improved physical properties.
Type:
Grant
Filed:
March 14, 1974
Date of Patent:
January 6, 1976
Assignee:
Witco Chemical Corporation
Inventors:
Carl Bernstein, Konstantinos Arvanitis, Yuen Ng