Abstract: The invention relates to new, low viscosity radiation-hardenable urethane acrylates prepared from oxalkylated polyols with 25 to 75 mole % of a polyol having a degree of oxalkylation between 3 and 5 and 75 to 25 mole % of a polyol having a degree of oxalkylation between 8 and 25, the resulting coatings having improved abrasion resistance, as well as their use as coating compositions, in particular for flooring materials.
Type:
Grant
Filed:
September 4, 2002
Date of Patent:
June 22, 2004
Assignee:
Bayer Aktiengesellschaft
Inventors:
Jan Weikard, Wolfgang Fischer, Manfred Müller, Thomas Fäcke, Herbert Witossek
Abstract: This invention relates to a process for the preparation of an isotropic rigid foam comprising the step of reacting: (A) an organic polyisocyanate component selected from the group consisting of: (1) a polymethylene poly(phenylisocyanate) and (2) an NCO-terminated prepolymer, and comprising the reaction product of: (a) a polyester comprising the reaction product of (i) pure ortho-phthalic acid or phthalic anhydride and (ii) a glycol and (b) a polymethylene poly(phenylisocyanate); with (B) an isocyanate-reactive component comprising: (1) a liquid OH-terminated prepolymer having a viscosity of more than about 100,000 mPa·s at 25° C.
Type:
Grant
Filed:
November 13, 2001
Date of Patent:
September 9, 2003
Assignee:
Bayer Corporation
Inventors:
David D. Steppan, Alan D. Bushmire, Edward E. Ball
Abstract: The present invention relates to a catalyst system for the production of polyurethane comprising catalysts for polyurethane formation and sterically hindered carbodiimides, which system is capable of lessening the “fogging” problem in the production of polyurethane materials, without impairing in particular the aging properties of the polyurethane materials thus produced.
Abstract: The present invention relates to a novel process for preparing hydrazodicarbonamide (HDC) that is, after oxidation to azodicarbonamide (ADC), used industrially as a polymer auxiliary.
Abstract: The invention relates to a process for the electrolysis of sodium chloride-containing brine with parallel operation of amalgam electrolysis units (5) and membrane electrolysis units (4) with a common brine circuit using a mercury-resistant oxygen consumable cathode in the membrane electrolysis unit (4).
Type:
Grant
Filed:
June 5, 2000
Date of Patent:
May 1, 2001
Inventors:
Fritz Gestermann, Hans-Dieter Pinter, Helmut Ziegler
Abstract: Compounds, for initiating the polymerization of ethylenically unsaturated compounds, having the formula ##STR1## where E is nitrogen, phosphorus, arsenic or antimony,X is oxygen, NR.sup.1 or sulphur,L is R.sup.8 R.sup.9 R.sup.10 E.sup.1 (Y).sub.n, alkyl ether, ester, alkyl and aryl nitrites, pyridine, piperidine, sulphoxides, sulphones, sulphimides, sulphodiimides or sulphur ylides, and R.sup.1 -R.sup.5 are as defined in the specification.
Type:
Grant
Filed:
September 29, 1997
Date of Patent:
May 2, 2000
Assignee:
Bayer Aktiengesellschaft
Inventors:
Karl-Heinz Aleksander Ostoja Starzewski, Uwe Denninger
Abstract: This invention relates to a novel freeze-stable allophanate modified toluene diisocyanurates, and to a process for producing these freeze-stable allophanate-modified toluene diisocyanurates which requires a catalyst which is capable of forming both trimer and allophanate groups, or a catalyst system comprising at least one catalyst capable of forming trimer groups and at least one catalyst capable of forming allophanate groups. This invention also relates to novel freeze-stable blends of the allophanate-modified toluene diisocyanurates with di- and/or polyisocyanates of the diphenylmethane series; and to freeze-stable urethane prepolymers of the allophanate-modified toluene diisocyanurates, or the blends of these with an isocyanate of the diphenylmethane series.
Abstract: This invention relates to flexible foams and flexible molded foams prepared from an isocyanate blend comprising an allophanate modified MDI, a polyether polyol, and a polymethylene poly(phenyl isocyanate). The present invention also relates to processes for the production of these flexible foams and flexible molded foams.
Type:
Grant
Filed:
November 10, 1997
Date of Patent:
October 13, 1998
Assignee:
Bayer Corporation
Inventors:
Sanjeev Madan, William E. Slack, Jay M. Capelli
Abstract: Thiocarbohydrazide (TCH) is made by reacting carbon disulfide and hydrazine in the presence of a mercaptan at an elevated temperature. The TCH is removed from the reaction mixture, the mother liquor is further treated to form HDTC which is further reacted to form TCH and the mother liquor is recycled. A major advantage of this process is the recyclability of the mother liquor without reduction in TCH yield.
Type:
Grant
Filed:
March 17, 1989
Date of Patent:
July 24, 1990
Assignee:
Mobay Corporation
Inventors:
Dennis E. Jackman, Gary W. Combs, Dietmar B. Westphal