Abstract: Monoblocked diisocyanates which contain little free and diblocked diisocyanate are obtained by a process which involves adding 1 mole of a blocking agent to a diisocyanate which is present in excess and subsequently removing the excess diisocyanate by thin film evaporation. The compounds produced are useful for the production of cataphoresis resins.

Abstract: A herbicidal compound, and a method of use therefor, for the selective treatment of useful plant cultures, having a broad spectrum of activity against weeds and noxious grasses in pre-emergence and/or post-emergence periods having the formula: ##STR1## wherein R.sub.1 is a straight-chain or branched-chain alkyl, alkoxy, alkoxyalkyl, or alkylol radical having less than a total of 15 oxygen and carbon atoms combined, or a hydrogen atom; (R) is a lower alkyl group; A is --CH.sub.2 -- or --CH.sub.2 CH.sub.2 --; with the proviso that n is 0-6, when A is --CH.sub.2 --, and n is 3-6, when A is --CH.sub.2 CH.sub.2 --; and wherein the substituents (R) on the cycloalkyl ring are identical to or different from each other.

Abstract: A method for preparing an aqueous polyurethane dispersion, comprising (a) preparing a prepolymer with free NCO groups by reacting an aliphatic or cycloaliphatic polyisocyanate with a polyol, and an anionic compound; (b) dispersing said prepolymer in water; (c) reacting said water-dispersed prepolymer with a diamino hydrazide of the formula: ##STR1## wherein R is an alkylene group of 2 to 15 carbon atoms or a cycloalkylene or arylene group of 6 to 15 carbon atoms as a chain lengthening agent; (d) reacting the prepolymer of step (c) in said dispersion with formaldehyde to effect crosslinking.

Abstract: 4-DL-alkylester-.gamma.-alaninyl-6-chloro-S-triazines having the formula (I): ##STR1## wherein R.sub.1 is a straight or branched chain alkyl, alkoxy, alkoxyalkyl or alkylol radical which is unsubstituted or substituted by a cyclopentyl or cyclohexyl group, which is, itself, unsubstituted or substituted by up to 5 methyl groups; R.sub.2 is a radical from the group of alkyl radicals of 1 to about 3 carbon atoms, or a hydrogen atom; and R is a radical from the group of alkyl radicals of 1 to about 3 carbon atoms.

Abstract: A method for producing a polyaddition product of isophorone diisocyanate and diols which comprises, reacting a uretidione group-containing dimer of isophoronediisocyanate, which is decomposable by heat into 98% isophorone diisocyanate, with a diol, wherein the ratio of NCO to OH groups is such that the final polyaddition product has free terminal NCO groups, or free terminal OH groups.

Abstract: A polyurethane powder enamel free of volatile cleavage products comprising an adduct of the uretidinedione dimer of isophorone diisocyanate with a diol, wherein the adduct has the formula ##STR1## wherein R= ##STR2## X=NCO or ##STR3## R"=a divalent aliphatic, cycloaliphatic, aromatic or araliphatic hydrocarbon radical or a diol, n>1, andR'=a monoalcohol radical or primary or secondary monoamine radical with 1-30 C-atoms, wherein the NCO/OH ratio of the dimer to the diol is from 1:0.5 to 1:0.9, the dimer/diol molar ratio is from 2:1 to 6:5, the average molecular weight is between 550 and 4300, and the melting point is .gtoreq.70.degree. C. and .ltoreq.130.degree. C., and wherein the uretidinedione groups present in the adduct are cleavable with heat into .gtoreq.98% --NCO groups, and a polyol having an OH functionality .gtoreq.3.4 to .ltoreq.7, an average molecular weight of 2000 to 5000, an OH number between 30 and 100 mg KOH/g, a viscosity of <100,000 mpa.s at 160.degree. C., and a melting point .

Abstract: A stoving enamel comprising (a) 30-70% by weight of a mixture of a polymer containing hydroxyl groups having a hydroxyl number between 40 and 240 mg KOH/g with an isocyanurate-free derivative of isophorone diisocyanate containing uretidinedione groups and blocked isocyanate groups, (b) 0-3% by weight of a cross-linking catalyst, (c) 30-60% by weight of an organic solvent, (d) 0-65% by weight of a filler or pigment, (e) 0-5% by weight of a dye, and (f) optionally 0.1-3% by weight of leveling agents, gloss improvers, antioxidants, and/or stabilizers, has improved storage stability, reduced curing time and reduced liberation of blocking agent during cure.

Abstract: A polyurethene powder enamel comprising a mixture of(a) an adduct of a uretidinedione dimer of isophorone diisocyanate and a diol having the following formula: ##STR1## n.gtoreq.1, and R'=a divalent aliphatic, cycloaliphatic, araliphatic, or aromatic hydrocarbon radical, which is the residue of the diol,wherein the ratio of NCO to OH groups in the formation of said condensation product is from 1:0.5 to 1;0.9, the mole ratio of uretidinedione to diol is from 2:1 to 6:5, the content of free isocyanate groups in said adduct is not greater than 8% by weight, and said adduct has a molecular weight between 500 and 4000 and a melting point between 70.degree. C. and 130.degree. C., and(b) a polyol having an OH-functionality of 2.2 to 3.5, an average molecular weight of 2000 to 4500, a hydroxyl number of 30 to 100 mg KOH/g, a viscosity of <80,000 mPa.s at 160.degree. C. and a melting point between 65.degree. C. and 120.degree. C.

Abstract: A process of producing storage-stable urethane acryls which comprises:(A) forming a prepolymer by reacting one isocyanate group of a cycloaliphatic diisocyanate having two isocyanate groups of substantially different reactivity, with a single NCO reactive hydroxy group-containing acrylic compound which is additionally polymerizable;(B) reacting said prepolymer with a multifunctional polyol to thereby obtain a substantially NCO-free urethane acryl. Acryl urethanes produced can be used as hot melts or in mixtures with reactive diluents for coatings of plastics, metals, wood, pressboards, glass, leather, concrete, and the like.

Abstract: Herbicidal-substituted .alpha.-(trimethylcycloalkenyl)-N-alkylacetamides of the formula ##STR1## wherein R is a linear or branched alkyl or alkoxyalkyl radical with 1-6 carbon atoms or an allyl radical, optionally substituted with C.sub.1 -C.sub.4 alkylene groups, and X is a substituent from the group consisting of hydrogen, methyl, chlorine and bromine, in any combination, the free valences signify hydrogen and two of the methyl groups on the ring are attached to the same carbon atom, are useful pre- and post-emergent herbicides for weed control in crops.

Abstract: Urea derivatives containing isocyanatomethyl groups of 3(4), 8(9)-diisocyanatomethyltricyclo [5.2.1.0.sup.2,6 ] decane of the formulaOCN--H.sub.2 C--[R--CH.sub.2 --NH--CO--NH--CH.sub.2 ].sub.n --R--CH.sub.2 --NCO, in which R is ##STR1## and n=1-5.

Abstract: A method for the coating and protection of a glass surface which comprises:treating the glass surface with an aqueous or an alcoholic solution of a silane in order to provide a skim coat thereon, drying the resulting silane-coated surface, coating the dried silane-coated surface with a paste comprising (1) an aliphatic or cycloaliphatic diisocyanate, a mixture thereof, or a reaction product thereof with water, wherein the mole ratio of said diisocyanate to water is 2:.ltoreq.1 and (2) a hydroxy-group containing polyester derived from a .omega.-hydroxy carboxylic acid or a lactone therefrom and a triol, wherein said acid or lactone contains at least 4 carbon atoms, and hardening the paste. Glass bottles coated by this a method are also described in this invention.

Abstract: A method for the preparation of high-melting resins which comprises polymerizing a butadiene-rich C.sub.4 -cut of C.sub.4 -olefins with a liquified protonated Friedel-Crafts catalyst of the formulaAlX.sub.n R.sub.m.HXwhereinX=cl, Br, I;R=c.sub.1 -c.sub.4 alkyl or isoalkyl group;N=1-3;M=0-2;Wherein the catalyst is liquified with alkyl benzenes containing C.sub.1 -C.sub.4 alkyl or isoalkyl groups and wherein the C.sub.4 -olefin cut is used with a content of from 50-70% of 1,3-butadiene and the polymerization takes place at 35.degree.-80.degree. C. The high-melting resin obtained by the aforementioned method.

Abstract: Urea derivative containing isocyanate groups having the formula ##SPC1##This urea derivative is prepared by reacting 3-isocyanatomethyl-3,5,5-trimethylcyclohexylisocyanate with water in a molar ratio of 2:1 at temperatures in the range of 0.degree.-100.degree.C in the presence of a catalyst with stirring in a solvent for the urea derivative.