Abstract: The present invention is directed to polyisocyanate mixtures which are liquid at room temperature and which(a) contain from 10 to 42% by weight of aromatically-bound isocyanate groups, which may be partly in the form of carbamic acid chloride;(b) contain from 0.5 to 5% by weight of sulphur in the form of sulphonic acid groups which may be at least partly neutralized or esterified;(c) contain from 0.5 to 5% by weight of phosphorus in the form of phosphonic acid alkyl ester groups or phosphonic acid aralkyl ester groups and(d) have a viscosity of from 10 to 50,000 cP at 25.degree. C.

Abstract: This invention concerns the preparation of dinitrile phosphonates, as well as their hydrolysis into the corresponding diacids, and reduction into the corresponding diamines. These compounds can be used, in particular, to make polyamides, polyurethanes or polyurates fireproof, as well as to increase their adhesive properties.

Abstract: The present invention relates to new polyols modified by phosphonoformamidine groups, to a process for the preparation thereof and the use thereof as starting component for the preparation of preferably foamed polyurethane plastics.The process involves (A) reacting diisocyanatocarbodiimides corresponding to the following general formula:OCN--R.sup.2 --N.dbd.C.dbd.N).sub.m R.sup.2 --NCOwith polyhydroxyl compounds corresponding to the following general formula:A--OH).sub.nto form a polyhydroxyl compound containing carbodiimide groups and (B) reacting the carbodiimide groups remaining in the product of step (A) by means of a basic catalyst with a phosphite corresponding to the following general formula: ##STR1## to form phosphonoformamidine groups wherein m represents a number of from 1 to 10, andR.sup.1 represents a C.sub.1 -C.sub.18 aliphatic, C.sub.4 -C.sub.15 cycloaliphatic or C.sub.6 -C.sub.

Abstract: Hydantoins of the formula ##STR1## wherein R.sub.1 is hydrogen or alkyl of 1 to 8 carbon atoms, R.sub.2 is ##STR2## R.sub.3 is alkyl of 1 to 8 carbon atoms, and X is a straight or branched chain alkylene of 1 to 4 carbon atoms or a straight or branched chain alkylene of 3 to 6 carbon atoms containing an internal carbamido group; or R.sub.1 and R.sub.2 together are Y where Y is a straight or branched chain alkylene of 4 to 8 carbon atoms having a pendant ##STR3## ARE PREPARED BY REACTING FIRST .alpha.,.beta.-UNSATURATED ALDEHYDES OR KETONES WITH ALKYL PHOSPHITES TO FORM A PHOSPHONATE ALDEHYDE OR KETONE FOLLOWED BY A CLASSICAL Bucherer hydantoin synthesis.

Abstract: Flame-retarding compounds are disclosed which are of the formula ##STR1## wherein X is a phosphorus derivative.

Abstract: Novel esters of pentavalent phosphorus acid having the formula ##STR1## WHEREIN R and R' are haloalkyl containing from 2 to 6 carbon atoms and from 1 to 6 halogen atoms; n is an integer of from 1 to 3; each X is independently selected from hydrogen, halogen, alkyl, or hydroxyl, provided that at least one X is hydroxyl. The above compounds are effective reactive flame retardants in polyurethane and polyester polymeric compositions.

Abstract: The instant invention relates to a new process for splitting up polyurethane waste into activated polyhydroxyl compounds which may be reused for the production of polyurethane plastics. The process broadly comprises reacting the polyurethane waste with lactams or equilibrium associates of lactams and active hydrogen containing compounds at temperatures of from 150.degree. to 250.degree. C. If desired, the process may be conducted under elevated pressure.

Abstract: This invention relates to novel halogen-free flame retarding agents and a process in which they are used in the production of polyurethanes. These compounds are represented by the general formula: ##STR1## wherein: R.sub.1 represents C.sub.1 -C.sub.5 alkylene groups which may be branched,R.sub.2 represents C.sub.1 -C.sub.3 alkyl groups which may be branched or R.sub.1 OH andR.sub.3 represents C.sub.1 -C.sub.8 -alkyl, C.sub.1 -C.sub.8 -dialkylamino, C.sub.1 -C.sub.4 -oxyalkyl, C.sub.1 -C.sub.4 -thioslkyl, C.sub.6 -C.sub.14 -aryl or C.sub.7 -C.sub.15 -aralkyl groups or ##STR2## and A and L may be identical or different and represent C.sub.1 -C.sub.10 -alkyl groups, which may be branched, benzyl groups or OR groups, whereinR represents an alkyl group, with 1-8 C atoms which may be branched, or a benzyl group.