Abstract: The present invention relates to a process for the production of storable thermosetting polyurethane-polyurea compositions wherein a storable isocyanate component stabilized by a surface coating and a polyol and/or polyamine component are separately prepared. A one-component polyurethane-polyurea reactive mixture is formed by mixing just before the intended use the separate components under mild shear forces at a temperature below the thickening temperature of the final reactive mixture.

Abstract: The present invention relates to a process for the production of aliphatic and/or cycloaliphatic diisocyanates which are color stable to heat, which is characterized in that a diisocyanate with aliphatically-and/or cycloaliphatically-bound isocyanate groups is heated in the presence of about 0.1 to 3% by weight, based on the diisocyanate, of at least one compound which is soluble in the diisocyanate and contains at least 3% by weight of structural units corresponding to the formula: ##STR1## for up to about 5 hours at a temperature of about 100.degree. to 220.degree. C. and the diisocyanate which has been treated in this way is subsequently purified by distillation.The present invention also relates to the use of the products of the present process for the production of modified polyisocyanates having improved coloration.

Abstract: The present invention relates to substantially colorless organic polyisocyanates, optionally in solution in an inert solvent, having a Hazen color index according to DIN 53 409 of at most 60 and a yellow value according to DIN 6167 of at most 3.0, characterized by a content of about 0.01 to 1 ppm (by weight), based on polyisocyanate, of an organic dye soluble in the polyisocyanate and having an absorption maximum of about 560 to 590 nm or a mixture of such dyes.The present invention also relates to two processes for preparing the substantially colorless organic polyisocyanates. In the first process, the organic dye is added to the prepared polyisocyanate while in the second process the organic dye is added to the starting materials used to prepare the polyisocyanate. Finally, the present invention is directed to the production of polyisocyanate polyaddition products from the substantially colorless organic polyisocyanates and isocyanate-reactive compounds.

Abstract: A dispersion comprising a solvent having dispersed therein a plastic and a defoaming agent comprising by weight approximately (a) 80 to 100% by weight of a polyoxyalkylenesiloxane copolymer of the formula[R.sup.1 Si(OSiR.sub.2).sub.n ].sub.m Z.sub.m-1 (OR.sup.2).sub.m+2in whichR represents an optionally halogen-substituted alkyl group with up to 4 C atoms,R.sup.1 represents the substituent R or a phenyl radical,R.sup.2 represents a group of the composition ##STR1## Z represents the difunctional unit --O-- or ##STR2## and R.sup.3 denotes a hydrocarbon radical with up to 6 C atoms,R.sup.4 denotes independently of one another hydrogen or R.sup.3,n denotes a number between 3 and 40,m denotes a number between 1 and 15,x denotes a number between 0 and 68,y denotes a number between 0 and 52,x+y denotes a number between 1 and 68 and(b) 0-20% by weight of a hydrophobic silicon dioxide, whereby substantially bubble-free films can readily be prepared therefrom.

Abstract: Aqueous dispersions of polymers containing (meth)acrylic acid alkyl ester units which contain the polymer in the form of relatively large, non-agglomerated, spherical particles (=main spheres) and relatively small, non-agglomerated, spherical particles (=filler spheres), wherein the smaller filler spheres have an average particle diameter d.sub.F measured using an electron microscope of from 50 to 150 nanometers (nm) and the average diameter of the large main spheres d.sub.H is from 1.35 to 3.5 times larger than the average particle diameter d.sub.F, provided that d.sub.H is at least 140 nm, and wherein the ratio of the total mass of the polymer composed of main spheres M.sub.H to the total mass of the polymer composed of filler spheres M.sub.F isM.sub.H :M.sub.F =20:1 to M.sub.H :M.sub.F =1:20and wherein at least 70% of the number of main spheres and at least 70% of the number of filler spheres lie in the range of .+-.25% of the respective average value of d.sub.H or d.sub.F.

Abstract: 40-50% by weight finely divided, stable, aqueous dispersions (particle size 0.1-0.15.mu.) of copolymers of copolymerized units of20-48% by weight of acrylonitrile which may be partially substituted by styrene,47,5-70,5% by weight of n-butyl acrylate,3,5-4,5% by weight of methacrylic acid, which may be substituted up to 50% by acrylic acid and0-5% by weight of N-methoxymethyl metharylamide.The dispersions are prepared by a special process characterized by a critical combination of known process steps. The dispersions are eminently suitable for use as binders in unpigmented or pigmented aqueous dispersion paints for metal, wood, plastics and mineral substrates.

Abstract: The instant invention relates to an aqueous silicone polyester resin system having a silicone content of at least 30% by weight, based on the solid binder, comprising a polyester resin having an acid number of from 50 to 170; a silicone precondensate with SiOH or SiOR-functionality; or a silicone-polyester-combination resin; having from 0 to 80% by weight, based on the solid binder, of an organic solvent; from 0 to 10% by weight, based on the solid binder, of an emulsion or dispersion auxiliary; a nitrogen base; and optionally at least one pigment or filler.The invention relates also to the production of the silicone polyester-resin system and to the use of the resin in aqueous lacquer materials.

Abstract: A process for the production of polycondensates linked by cyclic imide groups, wherein at least one organic polyisocyanate or masked isocyanate, formic acid and at least one cyclic dicarboxylic acid anhydride compound which, in addition to the cyclic anhydride group, is substituted at least once by another cyclic anhydride, carboxyl, carbalkoxy, carbaroxy or SO.sub.3 H group, are polycondensed at temperatures in the range from 0.degree. to 450.degree. C.

Abstract: Production of polycondensates coupled by cyclic imide groups by polycondensing an organic polyisocyanate or a masked organic polyisocyanate, a cyclic carboxylic acid anyhydride which is substituted by at least one further cyclic anhydride group, a carboxyl group, an ester group or an SO.sub.3 H group, and a monohydroxyalkyl ether at a temperature of from 0 to 450.degree. C, lacquers produced therefrom and the use of said lacquers for coating substrates. Typical examples of said monohydroxyalkyl ethers include methyl-, isopropyl, cyclohexyl-, benzyl-, phenyl- and methoxyethyl-ethylene glycol or propylenglycol-monoethers.