摘要:
New thermoreactive recording materials contain at least one salt of a specially modified bisphenolcarboxylic acid and are distinguished by good stabilisation of the ink, even upon extended storage time, good light stabilities and excellent stabilities to water, plasticisers, fats and substances contained in text-marking pens.
摘要:
Copolymers containing nitrile groups based on ethylenically unsaturated monomers are prepared by reacting the copolymers on which they are based with ammonia at temperatures of from 150.degree. to 270.degree. C. and pressures from 30 to 350 bar in the presence of an aliphatic nitrile and/or dinitrile.
摘要:
A thermoplastic molding composition is disclosed comprising a polydiorganosiloxane-polycarbonate block cocondensate and 0.5% to 15% by weight of a particular hydroxy benzotriazole. The composition is characterized by its improved protection against UV light.
摘要:
The invention relates to the use of the diphenol corresponding to formula (I) ##STR1## for the production of high molecular weight, thermoplastic, aromataic polycarbonates, to a process for the production of these polycarbonates and to the new thermoplastic having improved heat resistance obtainable by the process.
摘要:
This invention relates to aliphatic polycarbonates including sequential copolymers based on cyclic aliphatic carbonates and esters and block copolymers of blocks of polymerised cyclic aliphatic carbonates and blocks of polymerised vinyl compounds stabilized against thermal degradation containing 0.01 to 3.0% by weight, based on polymer, of a compound of trivalent phosphorus.
摘要:
Process for the preparation of aliphatic polycarbonates by polymerizing cyclic aliphatic carbonates in the presence of initiators and/or catalysts, in which the initiators used are alkoxy silanes of the formula ##STR1## in which R.sub.1, R.sub.2 and R.sub.3 independently of one another represent a C.sub.1 -C.sub.4 -alkyl radical, n is an interger from 1 to 6 andR.sub.4 denotes an n-valent, optionally substituted, aliphatic hydrocarbon radical,and the catalysts used are the nucleophilic catalysts which are known from group transfer polymerization.
摘要:
New potent lipoxygenase inhibitors which are 1H-pyrido-[2,3-b][1,4] thiazines are disclosed. The new thiazines are of the formula ##STR1## in which R.sup.1 denotes hydrogen, halogen, optionally substituted alkyl or alkoxy or the group ##STR2## in which R.sup.5 and R.sup.6 are identical or different and denote hydrogen, optionally substituted alkyl or aryl, or can be linked to form a 5- or 6-membered heterocyclic ring,R.sup.2 and R.sup.3 are identical or different and denote hydrogen or optionally substituted alkyl or alkoxy andR.sup.4 denotes hydroxyl, the group ##STR3## in which R.sup.5 and R.sup.6 have the abovementioned meaning, or, in the case where R.sup.3 denotes hydrogen or optionally substituted alkoxy, also denotes optionally substituted alkoxy.
摘要:
The invention relates to a sulphonic acid amidamine corresponding to the following general formula I: ##STR1## wherein R.sup.1 represents a C.sub.8 -C.sub.30 linear, saturated aliphatic hydrocarbon group or said group which is substituted by one or more chlorine atoms;R.sup.2 and R.sup.5 independently represent hydrogen or C.sub.1 -C.sub.6 alkyl or C.sub.1 -C.sub.6 alkyl which is substituted with one of the groups: hydroxyl, amino, mercapto, cyano, carboxyl or carbamoyl, and/or is interrupted by at least one oxy (--O--) or thio (--S--) group;R.sup.3 and R.sup.4 independently represent C.sub.2 -C.sub.13 alkylene or C.sub.5 -C.sub.7 cycloalkylene or said alkylene or cycloalkylene groups which are substituted with one of the groups: hydroxyl, amino, mercapto, cyano, carboxyl or carbamoyl;p represents zero or an integer of from 1 to 3;q represents zero or an integer of from 1 to 12; andn represents an integer of from 1 to 8.
摘要:
Compounds corresponding to the following general formula: ##STR1## wherein R.sup.0 represents H or, together with R.sup.1, represents --CO-- when X represents --CO-- or, together with R.sup.2, represents --CO-- when X represents --CH.sub.2 --CO,a residue of R, R.sup.1 and R.sup.2, H, C.sub.1 -C.sub.4 alkyl, aryl, COOR.sup.5 or, when R.sup.0 represents H and X represents --CO--, ##STR2## and the other residues R, R.sup.1 and R.sup.2 represent H; R.sup.3 represents H or CH.sub.3 ;R.sup.4 represents C.sub.7 -C.sub.20 aralkyl;R.sup.5 represents H, C.sub.1 -C.sub.4 alkyl or C.sub.6 -C.sub.12 aryl;X represents a residue --(CH.sub.2).sub.n CO--, --(CH.sub.2).sub.n SO.sub.2, --CH.sub.2 --, --CH.sub.2 O--CO-- ##STR3## m represents 1 or 2; and n represents 0 or 1;are suitable for use as incorporable antiagers for polymers, particularly nitrile rubber.
摘要:
New cyclic carbonic acid derivatives of the formula ##STR1## in which R denotes either --CH.sub.2 OH, R.sup.1 then representing an alkyl radical having 1 to 4 C atoms, or ##STR2## R.sup.1 and R.sup.2 then independently of one another representing methyl or ethyl, or ##STR3## R.sup.1 and R.sup.5 then each representing an alkyl radical having 1 to 4 C atoms, or in whichR and R.sup.1 together denote ##STR4## wherein A represents the group ##STR5## or oxygen, a process for their preparation, and their use as copolymerization components in the preparation of polycarbonates.