Abstract:
A process for preparing an aromatic polycarbonate of controlled molecular weight which comprises interfacially reacting in water and an organic solvent, a dihydric phenol, a carbonate precursor and a molecular weight controlling effective amount of a compound of the formula ##STR1## wherein n is an integer having a value of from 0 to 5 inclusive; Y is a halide or hydroxyl; and each R is independently selected from the group consisting of alkyl radicals, aryl radicals, alkaryl radicals, aralkyl radicals, alkoxy radicals, aryloxy radicals, halides, ##STR2## radicals wherein R.sup.2 is selected from hydrogen, alkyl radicals or acyl radicals or R.sup.3 is an acyl radical or --C.tbd.N. The polymers are useful in injection molded articles.
Abstract:
Novel polycarbonates are provided which exhibit rubbery and elastomeric properties which are the polymerized reaction products of:(i) a carbonate precursor; and(ii) at least one dihydric phenol represented by the general formula ##STR1## wherein R is selected from straight chain alkyl radicals containing from 8 to about 30 carbon atoms;each R.sup.1 is independently selected from halogen monovalent hydrocarbon, and monovalent hydrocarbonoxy radicals;each R.sup.2 is independently selected from halogen, monovalent hydrocarbon, and monovalent hydrocarbonoxy radicals; andn and n' are independently selected from whole numbers having a value of from 0 to 4 inclusive.
Abstract:
This invention relates to triphenolic compounds that may be used as branching agents for the manufacture of novel randomly branched polycarbonates. The polycarbonates are useful for the fabrication of blow molded articles.
Abstract:
Novel polycarbonates are provided which exhibit rubbery and elastomeric properties which are the polymerized reaction products of:(i) a carbonate precursor; and(ii) at least one dihydric phenol represented by the general formula ##STR1## wherein R is selected from straight chain alkyl radicals containing from 8 to about 30 carbon atoms;each R.sup.1 is independently selected from halogen monovalent hydrocarbon, and monovalent hydrocarbonoxy radicals;each R.sup.2 is independently selected from halogen, monovalent hydrocarbon, and monovalent hydrocarbonoxy radicals; andn and n' are independently selected from whole numbers having a value of from 0 to 4 inclusive.
Abstract:
Fluorinated bisphenols having a fluorinated alkyl group and a hydrogen atom upon the methylene carbon atom are prepared at atmospheric pressure or at low pressures from a phenol reactant and a fluorinated aldehyde compound in the presence of gaseous hydrogen chloride or gaseous hydrogen bromide catalyst. The fluorinated bisphenols having the fluorinated alkyl group and a hydrogen atom upon the methylene carbon atom are produced in excellent yields and are used for making flame-retardant polycarbonates and polyester-carbonate copolymers.
Abstract:
Polyarylates derived from (i) at least one aromatic dicarboxylic acid, and (ii) at least one branched dihydric phenol wherein branching occurs on the carbon atom adjacent the benzylic carbon atom.
Abstract:
There are provided novel polyarylates exhibiting rubbery or elastomeric properties which are derived from (i) at least one aromatic dicarboxylic acid or a reactive derivative thereof, and (ii) at least one dihydricphenol which contains as the briding group joining the aromatic residues a long straight chain 1,1-alkylidene radical.
Abstract:
Polyarylates derived from (i) at least one aromatic dicarboxylic acid or a reactive derivative thereof, and (ii) at least one cycloalkylidene dihydric phenol, wherein said cycloalkylidene contains from 8 to about 16 carbon atoms in the ring structure.
Abstract:
This invention relates to the use of polyol compounds as branching agents for the manufacture of randomly branched novel polycarbonates. The polycarbonates are useful for the fabrication of blow molded articles.