摘要:
A catalyzed interfacial polycondensation aromatic polycarbonate process comprising mixing a water soluble metal salt of a dihydric phenol with an aqueous solution of a strong base and a polymerization catalyst in an inert organic solvent; heating the mixture; concurrently adding a carbonyl halide, additional strong base and additional water soluble metal salt of a dihydric phenol to the heated mixture to form the cyclic oligomeric polycarbonate; and recovering the cyclic oligomeric polycarbonate. The preferred process utilizes the di-sodium salt of bisphenol-A, triethylamine polymerization catalyst and methylene chloride solvent with phosgene to form the cyclic oligomeric polycarbonates. The cyclic oligomeric polycarbonate products are accummulated in the organic phase of the reaction mixture and recovered therefrom by conventional techniques.
摘要:
A method for producing a purified polycarbonate resin is disclosed, comprising contacting a solid polycarbonate resin with a fluid comprising at least 70% by weight of carbon dioxide and having a temperature of 30 to 120°C and a pressure of at least 10 kg/cm². The method can effectively remove almost all the impurities contained in the polycarbonate resin within a very short period of time, thereby providing highly purified polycarbonate resin materials which are suitably used in the fields of information, electronic and medical industries.
摘要:
Homo- and copolycarbonates of spirobiindane bisphenols are prepared by first reacting phosgene with a substantially pure spirobiindane bisphenol in the presence of aqueous base in a heterogeneous medium at a pH in the range of about 9-11, and subsequently adding an interfacial polycarbonate formation catalyst and, optionally, a dihydroxyaromatic compound and a chain termination agent and continuing phosgene passage at a pH of at least about 10. By this method, there may be prepared homo- and copolycarbonates of 6,6'-dihydroxy-3,3,3',3'-tetramethyl-1,1-spiro(bis)indane having high molecular weight. Said homopolycarbonates and copolycarbonates with bisphenol A may be used for manufacture of optical disks having low birefringence.
摘要:
A resin material for optical instruments comprising a polycarbonate having the repeating units represented by the following general formula: has an extremely small birefringence particularly to obliquely incident light.
摘要:
A polyether polycarbonate block copolymer nonionic surface-active agent and method for making the same. The polyether polycarbonate surface active agent is comprised of a hydrophilic portion comprised of a polymer selected from the group consisting of a polyoxyalkylene polyether, a saccharide, a saccharide polyoxyalkylenate, a polycarbonate having a carbon dioxide content of from about 1 to 15 molar percent and mixtures thereof and a hydrophobic portion comprising alkylene and carbonate units arranged in alternating or random order to form a poly(alkylene carbonate) having a total carbon dioxide content of from about 25 to 50 molar percent and a total molecular weight of from about 300 to 10,000. The hydrophobic portion is bonded to the hydrophilic portion at each side of a reactive hydrogen. The surface active agent is prepared by polymerizing the hydrophilic portion with the hydrophobic portion in a weight ratio of about 10:90 to 90:10.
摘要:
Composition useful for molding into articles such as food containers, beverage bottles, cured structural plastics and the like comprising molding grade linear or unsaturated polyester or polycarbonate having reacted therewith or copolymerized therein the residue of one or more benzodioxylmethine compounds having the formula: wherein R¹ is cyano, carboxy, alkenyloxycarbonyl or an unsubstituted or substituted alkoxycarbonyl, cycloalkoxycarbonyl or aryloxycarbonyl radical; R² is one of the groups specified for R¹ or an unsubstituted or substituted aryl, carbamoyl, alkanoyl, cycloalkanoyl, aroyl, alkylsulfonyl, cycloalkylsulfonyl, arylsulfonyl or heterocyclic aryl radical; R³ is hydrogen or an unsubstituted or substituted alkyl, cycloalkyl or aryl radical; R⁴ is hydrogen, alkyl, alkoxy, or halogen; n is 1 or 2; and X is an unsubstituted or substituted methylene or ethylene radical; provided the benzodioxolylmethine compound bears at least one substituent that is reactive with one of the monomers from which the condensation polymer is derived, said benzodioxylmethine residue absorbing radiation in the range of about 250 nm to 390 nm and being nonextractable from said polymer and stable under polymer processing conditions. The benzodioxylmethine residues are present in the polymer as an integral part of the polymer chain and absorb ultraviolet radiation in the range of about 250 to about 390 nm. The residues are non-extractable from the polymer and stable at the conditions at which the polymers are manufactured and processed.
摘要翻译:可用于模制成诸如食品容器,饮料瓶,固化的结构塑料等物品的组合物,其包括与其反应或与其反应或在其中共聚的具有下式的一种或多种苯并二恶基甲基化合物的残余物的成型级线性或不饱和聚酯或聚碳酸酯: 其中R 1为氰基,羧基,烯氧基羰基或未取代或取代的烷氧基羰基,环烷氧基羰基或芳氧基羰基; R 2是为R 1或未取代或取代的芳基,氨基甲酰基,烷酰基,环烷酰基,芳酰基,烷基磺酰基,环烷基磺酰基,芳基磺酰基或杂环芳基指定的基团之一; R 3是氢或未取代或取代的烷基,环烷基或芳基; R 4是氢,烷基,烷氧基或卤素; n为1或2; X是未取代或取代的亚甲基或亚乙基; 只要苯并二恶唑基甲基化合物具有至少一个与衍生缩合聚合物的单体之一反应的取代基,所述苯并二氧杂环己基甲烷吸收在约250nm至390nm范围内的辐射,并且不可聚合,并且在聚合物下稳定 加工条件。 苯并二氧杂环己烯基残基作为聚合物链的组成部分存在于聚合物中,并吸收约250至约390nm范围内的紫外线辐射。 残余物不能从聚合物中萃取,并且在制备和加工聚合物的条件下是稳定的。
摘要:
Method for functionalizing a thermoplastic aromatic polycarbonate, copoly(ester carbonate), polyarylate, poly(arylene oxide) or polyarylethersulfone by reacting a precursor polymer that contains dicyclopentadiene with maleic anhyhydride, and the products so formed.
摘要:
A process for producing an azo group-containing polymer which comprises polycondensing:
(A) an azo-containing compound having an azo group in the main molecular chain and alcoholic hydroxyl, phenolic hydroxyl, imino or amino groups at both ends thereof, or a modified azo-containing compound which has been prepared by reacting a compound having an azo group in the main molecular chain and alcoholic hydroxyl groups at both ends thereof with a dicarboxylic acid chloride, with (B) a carbonate precursor, or when (A) is the azo-containing compound, a dicarboxylic acid, with the proviso that when the azo-containing compound is the compound having an azo group in the main molecular chain and alcoholic hydroxyl groups at both ends thereof (B) is not a carbonate precursor.
摘要:
Block polyphenylene ether-polycarbonates are prepared by blending a mixture of at least one polyphenylene ether wherein all phenolic end groups are in the free phenol form; at least one cyclic polycarbonate oligomer, preferably an oligomer mixture; and a catalyst for conversion of cyclic polycarbonates to linear polycarbonates; and heating said mixture to polymerization temperature. The preferred catalysts are phenoxides, salts of polycarbonate oligomers and tetraphenylborate salts. The method may be conducted in the melt or in solution, and is adaptable for employment in reactive processing operations.