Abstract: The invention relates to compositions comprising a) a polyol having on average 3 to 8 hydroxyl groups per molecule and an average molecular weight per hydroxyl group of up to 150; b) a polyether-polyol having on average 2 to 3 hydroxyl groups per molecule and an average molecular weight per hydroxyl group of 150 to 500 and c) a poly(oxyalkylene)polyamine having on average 2 to 4 amino groups per molecule and an average total molecular weight of between 1000 and 3000.The compositions described are distinguished by a low tendency to demix, even during prolonged storage.Reaction mixtures of the compositions described, as hardeners, and polyisocyanates of the diphenylmethane series cure fully without passing through a brittle phase. The shaped articles formed have good mechanical properties.

Abstract: Thixotropic polyurethane systems based on a polyol component and an isocyanate component, the polyol component containing a mixture of polyamidoamine and low molecular weight, polyfunctional amines, more particularly aromatic amines, which are suitable in particular as adhesive systems for special applications.

Abstract: A process for the preparation of copolymers which comprises reacting carbon monoxide and one or more ethylenically unsaturated compounds under polymerization conditions in the presence of a catalyst system comprising:(a) at least one metal selected from the Groups VI, VII and/or VIII of the Periodic Table; and(b) a stabilizing organic compound attached to (one of) the said metal(s) and containing at least one group capable of forming an additional, non-covalent, bond with (one of) the said metal(s).Also disclosed are products made by the process of the invention, and novel complexes of the general formula [LPdQ] [A].sub.n, wherein Q stands for 2-acylnorborn-1-yl, 2-acylnorborn-3-en-1-yl or a 2-acylethyl group, n is 0 or 1, A stands for a weakly or non-coordinating anion and, if n is 1, L stands for bidentate ligand of the general formula R.sup.1 R.sup.2 M.sup.1 --R--M.sup.2 R.sup.3 R.sup.4, wherein R.sup.1, R.sup.2, R.sup.3, and R.sup.

Abstract: Hydrophilic foams based on a polyurethane gel material which can be obtained fromone or more polyether-polyols selected from the group comprising substances formed by the addition of propylene oxide and optionally ethylene oxide on to conventional starter molecules,one or more diisocyanates,one or more superabsorbers,one or more accelerators selected from the group comprising conventional accelerators for polyurethanes,water, and optionallyconventional auxiliary substances and/or additives.

Abstract: A halogen-free blowing agent is used to produce isocyanate-based polymeric foams. The blowing agent is an organic liquid which is free from halogens and contains a positive binary azeotrope having a minimum boiling temperature in the range of about 15.degree. C. to about 80.degree. C. at normal atmospheric pressure. Particularly preferred is a binary azeotrope of an alicyclic hydrocarbon such as cyclopentane or cyclohexane and methyl formate.The halogen-free blowing agents contemplated herein provide the following advantages: no ozone depletion potential, no global warming potential, direct replacement in foam formulations for trichloromonofluoromethane (CFC-11), relatively higher blowing action, relatively lower foam density, relatively lower thermal conductivity, better compatibility, and relatively lower materials cost.

Abstract: A method for reducing the amount of microfoam in a spray-applied clear waterborne polymeric composition is provided, wherein the clear composition contains certain emulsion-polymerized addition polymers or certain multi-staged emulsion-polymerized addition polymers is formed; is spray-applied to a substrate; and is dried. Also provided are substrates bearing such spray-applied clear compositions.

Abstract: Water-thinnable two-component coating preparation, comprisinga) a polyisocyanate component comprising one or more organic polyisocyanates, andb) a polyurethane resin prepared by1. reacting(A) polyisocyanates with(B) polyols having an average molecular weight M.sub.n of at least 400,(C) optionally low molecular weight polyols and(D) compounds having at least two groups which are reactive toward isocyanate groups and at least one group which is capable of anion formation,to give a prepolymer containing free NCO groups and2. reacting the prepolymer prepared in step 1 with at least one of the components:(E) low molecular weight polyols carrying no further groups which are reactive toward isocyanate groups, these compounds being employed in excess;(F) compounds which are monofunctional or contain active hydrogen of differing reactivity, and are different from (E), and optionally(G) compounds which are different from (B), (C), (D), (E) and (F) and contain at least two groups which react with NCO groups.

Abstract: This invention relates to improved polyepoxide resins having enhanced physical and elastic properties. The polyepoxide resins comprise an polyepoxide resin based on a polyglycidyl ether of a phenolic type compound and an acrylate terminated urethane prepolymer. The improvement in the polyepoxide resin formulation comprises incorporating an aliphatic, aliphatic ether or ester component having monofunctional reactivity with an amine hydrogen and an amine curative having from 3 to 10, and preferably 3 to 5 epoxide reactive hydrogen atoms into the epoxy resin. The presence of the monofunctional and aliphatic amine reactive component along with the acrylate terminated urethane prepolymer results in an epoxy resin having the enhanced properties.

Abstract: Polyol blends containing HCFC-22 and basic catalyst, stabilized by the presence of an acid-ended polyester having a molecular weight in the range 300 to 3000 and an acid value in the range 5 to 100 mg KOH/g.

Abstract: Polyurethane dispersions, obtained by reacting an ionic polyester polyol, polycarbonate polyol or polyether polyol or mixture thereof with a polyisocyanate or mixtures of polyisocyanates. Such polyurethane dispersions, whose special feature is that the ionic groups are present in the polyol required for synthesizing the polyurethane molecule, are suitable in particular as binders for coatings, adhesives or printing inks.

Abstract: Ethylene, 2-methylene-1,3-dioxepane, and optionally carbon monoxide are reacted in the presence of a free radical catalyst to form a biodegradable and optionally photodegradable polymer represented by the formulae: ##STR1## where x and y are integers or ##STR2## where x, y and z are integers.

Abstract: A polyurethane particulate liquid absorbent, optionally containing microspheres, and a process for its preparation. The absorbent is suitable for use in cleaning up spilled liquids ranging from mobile ones, such as gasoline, to visconsones, such as crude oil. The absorbent and absorbed liquid are readily separated by a centrifugation step, thus providing recovered liquid, and liquid-free absorbent for re-use.

Abstract: Disclosed is an encrustation and bacterial-resistant coating for use on medical devices and in other medical-related applications. The coating includes a reaction product formed by the covalent linkage of a hydrophilic polyurethane prepolymer and aminopolycarboxylic acid. A urease inhibitor and/or an antibacterial agent may also be added to the coating.

Abstract: The present invention relates to coating agents based on hydroxyl-containing binders and isocyanate-containing crosslinking agents, in which coating agentsI.) the binder comprisesA1) 5 to 80% by weight of at least one polyester or one alkyd resin having an OH number from 0 to 200 mg of KOH/g and an acid number from 0 to 200 mg of KOH/g,A2) 95 to 20% by weight of at least one polyacrylate having an OH number from 30 to 250 mg of KOH/g and an acid number from 0 to 50 mg of KOH/g,the sum of the weight proportions of components (A1) and (A2) being in each case 100% by weight, andII.) the binder is obtainable from1.) at least one polycondensation resin whose acid component comprises 5 to 100 mol % of cycloaliphatic polycarboxylic acids and/or esterifiable derivatives thereof,2.) at least one polyacrylate, at least some of which has been prepared in the presence of the polycondensation resin obtained in the first process step and3.

Abstract: The invention consists of a composition containing a chemically blocked trimerization catalyst and a polyurethane prepolymer resin or resins with reactive isocyanate groups. In the absence of heat, the catalyst is not active and the solution of catalyst in the resin undergoes no appreciable reaction for periods ranging from hours to weeks depending upon the composition and concentration of the catalysts and the structure and concentration of the isocyanate groups. When heat is applied to the mixture a trimerization reaction occurs which produces a crosslinked polyurethane network with utility as an elastomer or as an adhesive.

Abstract: A second order nonlinear optically-active azo monomer comprising a benzimidazole moiety. The monomers can be incorporated into both linear and crosslinked polymers useful in electrooptical devices.

Abstract: A material of polyurethane with covalently linked X-ray contrast material, where the polyurethane is biocompatible, stable or also biodegradable in an appropriate environment, as well as X-ray contrasting.

Abstract: The present invention relates to a stable, liquid MDI prepolymer containing an allophanate-modified MDI, having an NCO content of 12 to 32.5% comprising a reaction product of an aliphatic alcohol and diphenylmethane diisocyanate comprising about 2 to 60% by weight 2,4'-diphenylmethane diisocyanate and less than 6% by weight of the 2,2'-diphenylmethane diisocyanate, and the rest being 4,4'-diphenylmethane diisocyanate.

Abstract: The present invention relates to polyester polyols which have a hydroxyl number of 80 to 250 and are the reaction product ofa) 52 to 60 mole % of a polyol component containingi) 10 to 50 mole % of one or more dihydric aliphatic alcohols having at least two carbon atoms, other than neopentyl glycol,ii) 5 to 40 mole % of one or more trihydric or higher functional aliphatic alcohols having at least 3 carbon atoms,iii) 10 to 40 mole % of one or more cycloaliphatic diols andiv) 10 to 60 mole % of neopentyl glycol, withb) 40 to 48 mole % of a dicarboxylic acid component containingv) 0 to 49.9 mole % of one or more saturated aliphatic dicarboxylic acids or an anhydrides thereof having at least 2 carbon atoms andvi) 50.1 to 100 mole % of one or more unsaturated aliphatic dicarboxylic acids or anhydrides thereof having at least 4 carbon atoms,wherein the percentages of a) and b), i) to iv) and v to vi) add up to 100.

Abstract: A method to prepare polyurethane and/or polyurea flexible foams which comprises reacting:A. an organic polyisocyanate compositionB. an isocyanate-reactive composition containing:a. at least one high Mw isocyanate-reactive compoundb.sub.1. a primary or secondary amino-functional compound (so-called chain-extender) of Mw below 1000 in an amount of less than 1% by wt of high Mw isocyanate-reactive compound(s) orb.sub.2. a mixture of at least two chain extenders of which at least one is a primary or secondary amino-functional compound of Mw below 1000, in an amount of 0.1% to 10% by wt of high Mw isocyanate-reactive compound(s)C. H.sub.2 OD. optionally catalystsE. optionally further blowing agents which are different from H.sub.2 O.F. optionally further conventional additives.