摘要:
A thermoplastic composition comprises a polycarbonate having repeating structural carbonate units of the formula (1): wherein at least 60 percent of the total number of R1 groups contain aromatic organic groups and the balance thereof are aliphatic, alicyclic, or aromatic groups; and wherein the polycarbonate comprises terminal groups derived from reaction with a cyanophenol of the formula wherein Y is a halogen, C1-3 alkyl group, C1-3 alkoxy group, C7-12 arylalkyl, C7-12 alkylaryl, or nitro group, y is 0 to 4, and c is 1 to 5, provided that y+c is 1 to 5; optionally a branching agent; an impact modifier; and a flame retardant. The compositions are useful in the manufacture of a wide variety of parts, particularly those having a thin wall.
摘要:
A thermoplastic composition comprises a copolycarbonate comprising 25 to 100 mole percent of a first carbonate unit derived from a dihydroxy aromatic compound having the formula wherein Ra′ and Rb′ are C1-12 alkyl, T is a C5-16 cycloalkylene, a C5-16 cylcloalkylidene, a C1-5 alkylene, a C1-5 alkylidene, a C6-13 arylene, a C7-12 arylalkylene, C7-12 arylalkylidene, a C7-12 alkylarylene, or a C7-12 arylenealkyl, and r and s are each independently 1 to 4, and r and s are 1 to 4; and 0 to 75 mole percent of a second carbonate unit, wherein the first carbonate unit and second carbonate unit are not identical; a polysiloxane-polycarbonate copolymer comprising 0.15 to 30 weight percent of a polysiloxane block comprising siloxane units of the formula wherein E is on average of 4 to 60 units, and 70 to 99.85 weight percent of a third carbonate unit, wherein an article having a thickness of 3.2 mm and molded from the thermoplastic composition has a Dynatup total energy of greater than 50 Joules, as measured at a constant speed of 3.3 to 3.6 m/sec at 23° C. according to ASTM D3763-02. A method of making and articles prepared therefrom are also disclosed.
摘要:
A polycarbonate-polyester block copolymer includes a polycarbonate block and a polyester block, each having specific structures. The block copolymer can be prepared, at least in part, from renewable feedstocks. In some forms, the block copolymer includes biodegradable segments that facilitate structural breakdown of objects molded from the block copolymer. Methods of preparing the block copolymer are described as are compositions that include it and articles prepared from it.
摘要:
A method of producing biodiesel through the trans-esterification of a triglyceride, comprising mixing a triglyceride, an alcohol, and a catalyst to form a mixture, where said catalyst is non-metal quaternary ammonium hydroxide or non-metal quaternary phosphonium hydroxide, removing volatile components from said mixture, and allowing the remaining mixture to separate into a biodiesel-rich layer and a glycerol-rich layer.
摘要:
A polycarbonate copolymer comprising90 to 100 mol % of units derived from a cyclohexylidene bisphenol of the formula wherein Ra′ and Rb′ are each independently C1-12 alkyl, T is a C5-16 cycloalkylene, a C5-16 cylcloalkylidene, a C1-5 alkylene, a C1-5 alkylidene, a C6-13 arylene, a C7-12 arylalkylene, C7-12 arylalkylidene, a C7-12 alkylarylene, or a C7-12 arylenealkyl, and r and s are each independently 1 to 4; 2 to 35 wt % of units derived from a polysiloxane diol of the formulas or a combination thereof, wherein Ar is a substituted or unsubstituted C6-36 arylene group, each R is the same or different C1-13 monovalent organic group, each R6 is the same or different divalent C1-C30 organic group, and E is an integer from 2 to 100; and 0 to 10 mol % of units derived from a dihydroxy aromatic compound of formula (3) wherein Ra and Rb are each independently halogen, p and q are each independently integers of 0 to 4, and the dihydroxy aromatic compound of formula (3) is not the same as the cyclohexylidene bisphenol or the polysiloxane diols.
摘要:
A thermoplastic composition comprises a polycarbonate, an ionizing radiation stabilizing additive, and a poly-substituted aromatic compound of formula: wherein X is an aryl group; Y is a non-hydrogen substituent group, a is 1 to 4, b is 0 to 4, a+b is less than or equal to 4, and c is 0 or 1; and wherein the amounts and identities of the polycarbonate, ionizing radiation stabilizing additive, and poly-substituted aromatic compound are selected such that a molded article having a thickness of 3.18 millimeters and comprising the thermoplastic composition has, after exposure to gamma radiation at 83 kGy and when measured according to ASTM D1925-70, an increase in yellowness index (dYI) of less than or equal to 50, when compared to the unexposed thermoplastic composition.
摘要:
A thermoplastic composition is disclosed, comprising the reaction product of: a polyester polycarbonate comprising a polyester unit and a polycarbonate unit; a polysiloxane polycarbonate copolymer having a haze of 30% or less, comprising a polycarbonate unit and a polysiloxane unit; and a transesterification catalyst. The resulting thermoplastic composition has a haze of 30% or less as measured according to ASTM D1003-00 at a thickness of 3.2 millimeters. A method of forming the composition and articles formed from the composition are also disclosed.
摘要:
Polycarbonate compositions having an aromatic polycarbonate resin with 90% or greater fluoroalkylene carbonate end-groups are formed from a partially fluorinated alcohol or a partially fluorinated polymeric alcohol, and a bisphenol and a carbonate source using melt or interfacial polymerization methods. Copolymers and blends with a variety of other bisphenols and other thermoplastics are also described. The polycarbonate compositions show high water contact angles, fluorine enrichment on the surface layer of molded articles, and good flame retardant properties and are useful in a variety of applications including medical, automotive, telecommunication and weatherable applications.
摘要:
A thermoplastic composition comprises a sulfonate end-capped polycarbonate of formula: Z-S(O)2—O-(-L-)m-O—S(O)2-Z wherein each Z is independently an alkyl or aryl group, wherein -(-L-)m- is a polycarbonate linking group with m units of linking unit L, and wherein m is at least one. Methods of making the sulfonate end-capped polycarbonate and thermoplastic composition, and articles prepared therefrom, are also disclosed.
摘要:
A thermoplastic composition comprises a polycarbonate that is not aryl carboxylate end-capped, and an aryl carboxylate end-capped polycarbonate of formula: Ar1—C(O)—O-(-L-)m-O—C(O)—A1 wherein each Ar1 is independently an aryl group, -(-L-)m- is a polycarbonate linking group with m units of linking unit L, and m is at least one; wherein the aryl carboxylate end-capped polycarbonate has aryl carboxylate end groups present in the thermoplastic composition in an amount of 0.01 to 500 mmol/Kg based on the combined weights of the polycarbonate that is not aryl carboxylate end-capped, and the aryl carboxylate end-capped polycarbonate, and wherein a molded article having a thickness of 3.2±0.12 millimeters and consisting of the aryl carboxylate end-capped polycarbonate, the polycarbonate, and less than or equal to 1.0 percent total weight of aliphatic diol, a mold-release agent, and an antioxidant has, after exposure to a total gamma radiation dose of 81 kGy and when measured according to ASTM D1925-70, an increase in yellowness index (dYI) of less than or equal to 24.5, when compared to the unexposed molded article. A method for preparing the aryl carboxylate end-capped polycarbonate that is not aryl carboxylate end-capped, and thermoplastic composition, an article prepared from the thermoplastic composition, are also disclosed.