Abstract: Flame-resistant thermoplastic branched polycarbonates of high molecular weight are prepared from:(1) a carbonate precursor;(2) at least one dihydroxyaromatic compound of formula: ##STR1## where: R is a single bond, or a substituted or non-substituted linear or branched C.sub.1 -C.sub.5 alkylene radical, or a group chosen from O, S, SO.sub.2 and CO;X and Y, which may be the same or different, are H or CH.sub.3 ;m and n, which may be the same or different, are whole numbers from 1 to 4;(3) at last one halogenated pyrimidine compound of formula: ##STR2## where: R.sub.2, R.sub.3, R.sub.4, which may be the same or different, are chlorine or bromine or hydrogen, on condition that at least one is chlorine or bromine;R.sub.1 is chlorine or bromine, or a radical of formula: ##STR3## where Z is NH or S or O; (4) at least one polyfunctional organic compound as branching agent, characterized by possessing at least three equal or different groups chosen from the groups OH, COOH, COCl and SO.sub.2 Cl.

Abstract: Thermoplastic, branched, high-molecular-weight polycarbonates endowed with flame-proof properties (self-extinguishing properties) are characterized in that they contain in their macromolecule carbonate units, units deriving from a di-hydroxy-aromatic compound having the formula: ##STR1## wherein: R is a single bond; orR is a linear or branched, either substituted or non-substitued, alkylene radical of from 1 to 5 carbon atoms; orR is selected from the group consisting of O, S, SO.sub.2, CO;X, Y which may be either equal to, or different from, each other, are either H or CH.sub.3 ;m, n which may be either equal to, or different from, each other, are integers comprised within the range of from 1 to 4;and units deriving from a halogenated macrocyclic compound having the formula ##STR2## wherein: R.sub.1 is H or OH or chlorine or bromine, andR.sub.2 is chlorine or bromine.

Abstract: Flame-resistant thermoplastic branched polycarbonates of high molecular weight are prepared from:(1) a carbonate precursor;(2) at least one dihydroxyaromatic compound of formula: ##STR1## where: R is a single bond, or a substituted or non-substituted linear or branched C.sub.1 -C.sub.5 alkylene radical, or a group chosen from O, S, SO.sub.2 and CO;X and Y, which may be the same or different, are H or CH.sub.3 ;m and n, which may be the same or different, are whole numbers from 1 to 4;(3) at least one halogenated carbonyl compound of formula: ##STR2## where: Z is a group chosen from O, S, and NH;R.sub.1 and R.sub.2, which may be the same or different, are chlorine or bromine;R is hydrogen or chlorine or bromine or a C.sub.1 -C.sub.3 alkyl radical;p is zero or 1 or 2.

Abstract: Flame-resistant thermoplastic branched polycarbonates of high molecular weight are prepared from:(1) a carbonate precursor;(2) at least one dihydroxyaromatic compound of formula: ##STR1## where: R is a single bond, or a substituted or non-substituted linear or branched C.sub.1 -C.sub.5 alkylene radical, or a group chosen from O, S, SO.sub.2 and CO;X and Y, which may be the same or different, are H or CH.sub.3 ;m and n, which may be the same or different, are whole numbers from 1 to 4;(3) at least one halogenated triphenolbenzamido compound of formula: ##STR2## where: Z is a group chosen from CO and SO.sub.2 ;R.sub.1 is chlorine or brominep is 1 or 2.

Abstract: Thermoplastic branched polycarbonates of high molecular weight and which possess flame-resistant (self-extinguishing) properties are provided wherein said polycarbonates contain in addition to carbonate units, units derived from a dihydroxyaromatic compound, units derived from a halogenated triphenyl compound and units derived from a polyfunctional organic branching agent.

Abstract: Thermoplastic, branched, high-molecular-weight polycarbonates endowed with flame-proof properties (self-extinguishing properties) are characterized in that they contain in their macromolecule carbonate units, units deriving from a di-hydroxy-aromatic compound having the formula: ##STR1## wherein: R is a single bond; orR is a linear or branched, either substituted or non-substituted, alkylene radical of from 1 to 5 carbon atoms; orR is selected from the group consisting of O, S, SO.sub.2, CO;X, Y which may be either equal to, or different from, each other, are either H or CH.sub.3 ;m, n which may be either equal to, or different from, each other, are integers comprised within the range of from 1 to 4;and units deriving from a halogenated macrocyclic compound having the formula: ##STR2## wherein: R.sub.1 is H or OH or chlorine or bromine, andR.sub.2 is chlorine or bromine.

Abstract: Branched, thermoplastic polycarbonates, suitable for being processed according to the blow-molding technique, are prepared by copolymerization with hydroxy-naphthoic acids or their derivatives.

Abstract: Branched, thermoplastic polycarbonates, suitable for being processed according to the blow-molding technique, are prepared by copolymerization with tri- or tetra-hydroxy biphenyl compounds.

Abstract: Thermoplastic, branched, high-molecular weight polycarbonates endowed with properties of flame-resistance (self-extinguishing polycarbonates) are characterized by the presence in their polymeric chain of units deriving from a di-hydroxy-aromatic compound having the formula: ##STR1## wherein: R is a single bond; or is a substituted or non-substituted, linear or branched alkyl group containing from 1 to 5 carbon atoms; or is a group selected from O, S, SO.sub.2, CO;X and Y are equal to, or different from, each other and stay for H or CH.sub.3 ;m and n are integers, equal to or different from each other, ranging from 1 to 4;and of units deriving from a mono-halogenated tetraphenyl compound having the formula: ##STR2## wherein: R, R.sub.2, R.sub.4, R.sub.6 stay for OH;R.sub.1, R.sub.3, R.sub.5, R.sub.7, either equal to, or different, from one another, stay for OH, H, or a linear or branched alkyl group of from 1 to 5 carbon atoms.

Abstract: Branched, soluble, high-molecular-weight, thermoplastic polycarbonates having improved properties, and, in particular, suitable to the fabrication by blow-moulding, characterized by the presence in their structure of units deriving from the use in the synthesis of tris(4'-hydroxyaryl)-amino-S-triazines having the formula: ##STR1## wherein R.sub.1 and R.sub.2, equal to, or different from each other, indicate hydrogen, linear or branched C.sub.1-5 alkyl, or halogen (in particular, chlorine and bromine).

Abstract: During the reaction of grafting of styrene and acrylonitrile to polybutadiene, the conversion of the graft monomers is increased from the values of 92.div.94% usually obtained, to values very close to 98%, by carrying out a redox-type reaction additional to that provided by the process, in the presence of an additional aliquot of acrylonitrile and of catalytic system.

Abstract: Branched, thermoplastic polycarbonates, suitable for being processed by means of the blow-moulding technique, are prepared by means of copolymerization with methylene-bis-naphthalene compounds.

Abstract: Branched, thermoplastic polycarbonates, suitable for being processed by means of the blow-moulding technique, are prepared by means of copolymerization with aliphatic polyfunctional acids or their derivatives.

Abstract: In the present invention disclosed are high-molecular-weight, soluble, thermoplastic branched polycarbonates endowed with improved properties, and suitable to blow-moulding fabrication.Such polycarbonates are characterized by the presence, in their structure, of units deriving from the following double-ring aromatic compounds: ##STR1## wherein R.sub.1 indicates H, --COCL, --SO.sub.2 Cl; R.sub.2, R.sub.3 and R.sub.4, equal to or different from each other, indicate --COCl or SO.sub.2 Cl.The above-said compounds are directly used in the syntheses.

Abstract: Branched, thermoplastic polycarbonates, suitable for being processed by means of the blow-moulding technique, are prepared by means of copolymerization with tetrafunctional heterocyclic compounds.

Abstract: In the present invention disclosed are high-molecular-weight, soluble, thermoplastic branched polycarbonates endowed with improved properties, and suitable to blow-moulding fabrication.Such polycarbonates are characterized by the presence, in their structure, of units deriving from the following single-ring aromatic compounds: ##STR1## wherein R.sub.1 indicates H, --COCl, --SO.sub.2 Cl; R.sub.2, and R.sub.3, equal to or different from each other, indicate --COCl or SO.sub.2 Cl.The above-said compounds are directly used in the syntheses.