Abstract: The invention relates to salts of pyromellitic acid which comprise 1 mol of pyromellitic acid and 0.5 to 2 mol of a guanidine of the following composition: ##STR1## in which R, R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are identical or different radicals from the group consisting of hydrogen, alkyl, cycloalkyl and aromatic hydrocarbon residues having 1 to 8 carbon atoms, and R.sup.1 and R.sup.2 and R.sup.3 and R.sup.4 may form a joint ring which may contain an oxygen atom as heteroatom. Also claimed are the preparation of the salts and their use for matt epoxide and hybrid powder coatings.

Abstract: The invention relates to salts of pyromellitic acid which comprise 1 mol of pyromellitic acid and 0.5. to 2 mol of a guanidine of the following composition: ##STR1## in which R, R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are identical or different radicals from the group consisting of hydrogen, alkyl, cycloalkyl and aromatic hydrocarbon residues having 1 to 8 carbon atoms, and R.sup.1 and R.sup.2 and R.sup.3 and R.sup.4 may form a joint ring which may contain an oxygen atom as heteroatom. Also claimed are the preparation of the salts and their use for matt epoxide and hybrid powder coatings.

Abstract: The present invention relates to novel polyamines containing urea groups and a process for the preparation of these polyamines, represented by the general formula: ##STR1## where n is: 2.ltoreq.n.gtoreq.1; and R denotes an alkylene radical having 2-14 C atoms which may optionally be substituted by 1-3 CH.sub.3 or C.sub.2 H.sub.5 groups, or 1-3 CH.sub.2 groups of the alkylene radical R may be substituted by --O--, --NH-- or --NCH.sub.3 --.

Abstract: The invention relates to new salts of pyromellitic acid, to a process for their preparation and to their use for the production of matt epoxide and hybrid powder coatings.

Abstract: The invention relates to new salts of pyromellitic acid, to a process for their preparation and to their use for the production of matt epoxide and hybrid powder coatings.

Abstract: The invention relates to a new polyamine of the following composition: ##STR1## wherein 1.gtoreq.n.gtoreq.6, R represents the hydrocarbon radical of a (cyclo)aliphatic, araliphatic or aromatic diisocyanate having 6-20 C atoms or a trimer thereof andwherein when 2.gtoreq.n.gtoreq.6,R.sup.1 represents an n-valent organic radical such as is formed by removal of n OH groups from a polyhydroxy compound which optionally contains ether oxygen atoms and has an average molecular weight Mn of between 60 and 5,000; andwhen n=1,R.sup.1 represents ##STR2## It furthermore relates to a process for the preparation of a polyamine, in which certain diisocyanates, adducts of diisocyanates with polyols or trimers thereof are reacted with the Schiff base of the following composition: ##STR3## wherein R.sup.2 =H or a branched or unbranched C.sub.1-14 -alkyl radical and R.sup.3 =a branched or unbranched C.sub.1-14 -alkyl radical, an C.sub.1-14 alkyl-substituted phenyl radical or a C.sub.1 -C.sub.

Abstract: A curing agent for a composition for the production of matt epoxide and hybrid powder coatings which is a mixture comprising:a) salts of phthalic, isophthalic and terephthalic acid and the following guanidines. ##STR1## wherein R, R.sup.1, R.sup.2, R.sup.3 and R.sup.4 may be identical or different radicals selected from the group consisting of H, (cyclo)alkyl and aromatic hydrocarbon radicals having 1-9 carbon atoms and where R.sup.1 with R.sup.2 and R.sup.3 with R.sup.4 each form a ring which contains an oxygen atom as heteroatom, and 0.5-2 mol of the guanidine A) react per mole of acid, andb) pyromellitic acid and/or trimellitic acid, 0.25-2 mol of b) employed per mole of a).

Abstract: The invention relates to an azomethine of the following composition: ##STR1## in which R.sup.1 is H or a branched or unbranched C.sub.1-14 -alkyl radical, andR.sup.2 is a branched or unbranched C.sub.1-14 -alkyl radical, an C.sub.1-14 alkyl-substituted phenyl radical or a C.sub.1 -C.sub.8 -(cyclo)-alkyl radical.It further relates to a process for preparing an azomethine, in which ##STR2## is reacted with the corresponding carbonyl compounds ##STR3## The invention also relates to the use of the azomethines for the preparation of certain polyazomethines (poly-Schiff bases), where the azomethines are reacted with diisocyanates or their adducts with polyols or their trimers, and to polyazomethine compounds.

Abstract: A lattice is disclosed which is made of a multiplicity of rods that are connected to one another by a series of joints. Each rod has a connecting member which serves to connect with the joint. The connecting member may be designed as a fork, the axis of which extends vertically to that of the rod. The lattice may be locked together by either a cam or by a spring clip. The resulting hollow body may be either a two- or three-dimensional object.

Abstract: A blocked highly functional polyisocyanate adduct is described with a melting point of <128.degree. C., preferably 80.degree.-110.degree. C., which is characterized in that the blocked polyisocyanate adduct with a functionality >2 contains 1.1-2 mol of blocking agent per blocked NCO group.

Abstract: The invention relates to light-stabile, reactive two-component PUR paints which cure at room temperature and are comprised of:a) isocyanate prepolymers blocked with certain sterically hindered piperidine derivatives; andb) (cyclo)aliphatic polyamines and/or aminoamides;wherewith 1-1.4 blocked NCO groups are brought to reaction per amino group.

Abstract: Polyether urethane urea amines are prepared by reacting an isocyanate prepolymer of the formula ##STR1## with a polyamine of the formula ##STR2## wherein R is an optionally alkyl-substituted alkanediyl group of 2-12 carbon atoms, or an optionally alkyl-substituted cycloalkanediyl group of 4-14 carbon atoms;R.sup.1 is H, --CH.sub.2 --CH.sub.2 --CN, cycloalkyl, or 2,2,6,6-tetramethylpiperidin-4-yl;R.sup.2 is equivalent to R;R.sup.3 is (CH.sub.2 --CH.sub.2 --O).sub.m, [CH.sub.2 --CH(CH.sub.3)--O].sub.m, or [CH.sub.2 --CH.sub.2 --CH.sub.2 --CH.sub.2 --O].sub.m ;n=1-5;x=2 or 3; andm=5-200;at an NCO:NH equivalent ratio of 1:2-12 at a temperature of 140.degree.-170.degree. C.

Abstract: Cold-curing, solvent-free, duroplastic two- and one-component polyurethane-polyurea compounds, comprisinga) a (cyclo)aliphatic polyisocyanate, with NCO groups blocked with specific, sterically-hindered piperidine derivative,b) a primary and/or secondary di- and/or polyamine, where --in the case of one-component systems--the primary amino groups are present in blocked form as ketimines andc) polyester- and/or polyether polyols are useful for coating, sealing and encapsulating compounds.

Abstract: The invention relates to epoxide resin mixtures hardenable at room temperature, comprised of:(A) Polyepoxides with more than one epoxide group per molecular;(B) Aliphatic or cycloaliphatic polyamines with more than two active hydrogen atoms bound to the nitrogen of the amino groups;(C) A reaction product having mean m.w. 500-8,000 of:(c1) a polyalkylene ether polyol prepared from alkylene oxides and one member selected from the group consisting of di-functional alcohols, polyfunctional alcohols, or mixtures thereof, and(c2) an aliphatic or cycloaliphatic diisocyanate, wherein the NCO : OH ratio is 2:1, and wherein said reaction product is blocked with a certain sterically hindered piperidine derivative; and optionally(D) Customary fillers, pigments, reaction accelerators, and viscosity regulators.

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: The invention relates to trans-cyclohexane-1,4-diisocyanate which is completely or partially blocked with epsilon-caprolactam and a method of manufacturing the same wherein 1 mole trans-cyclohexane-1,4-diisocyanate is reacted with 1 to 2 moles epsilon-caprolactam, without or with the presence of solvents. These blocked diisocyanates are used for polyurethane powders.

Abstract: The invention relates to trans-cyclohexane-1,4-diisocyanate which is completely or partially blocked with epsilon-caprolactam and a method of manufacturing the same wherein 1 mole trans-cyclohexane-1,4-diisocyanate is reacted with 1 to 2 moles epsilon-coprolactam, without or with the presence of solvents. These blocked diisocyanates are used for polyurethane powders.

Abstract: Polyurethane powder coating compositions which yield a matte surface after setting. The principal means of achieving matte surfaces with powder coating compositions is by adding fillers. These additives are detrimental to the coating properties. The known binder systems based on cycloaliphatic diisocyanate adducts which yield matte surfaces after setting are either of a complex nature or are inherently costly to prepare. These disadvantages are avoided if the polyurethane powder coating compositions are comprised of OH-group-containing polymers, and trans-1,4-cyclohexanediisocyanate (CHDI) adducts blocked with epsilon-caprolactam.

Abstract: Isocyanate-uretdiones having the formula: ##STR1## wherein the R groups are identical or different and are hydrocarbon groups having the formulas: ##STR2## and n is an integral or fractional number from 1 to 5. Production of the isocyanate-uretdiones, which can be dissociated by heat up to an extent of greater than 70%, is accomplished through dimerization of aliphatic diisocyanates having the formula: ##STR3## with a phosphine catalyst having the formula:X.sub.m P(NR.sub.2).sub.3-mwherein:m is 0, 1 or 2;x is a --Cl, --OR or --R group, wherein R is identical or different alkyl-, arylalkyl-, cycloalkyl, or alkyl-substituted cycloalkyl groups. The reaction temperatures are 0.degree.-80.degree. C.The reaction product is subjected to thin-layer distillation after a conversion of 5-70%, by weight, without deactivation of the catalyst. The compounds of the present invention are useful as intermediates in the production of starting materials for the production of polyurethanes.

Abstract: A storage-stabile polyurethane resin powder enamel which cures below 170.degree. C., which comprises a polyol in combination with isophorone diisocyanate (IPDI) which is blocked with a secondary amine having a boiling point of at least 150.degree. C. and which has the general formula: ##STR1## wherein R and R' are identical or different substituted alkyl groups with substitution in the position alpha to the nitrogen and wherein R and R' together must contain at least 9 carbon atoms, and R and R' together may form a common ring with at least 3 carbon atoms with the carbon atoms optionally interrupted by or substituted by nitrogen and/or oxygen hetero atoms.