Abstract:
A composite material comprises an electrically conductive material disposed over at least a portion of a substrate wherein the substrate comprises either: a) an immiscible blend of polymers having more than one glass transition temperature and one of the polymers has a glass transition temperature greater than 180 degrees Celsius; b) a miscible blend of polymers having a single glass transition temperature greater than 217 degrees Celsius; or, c) a single virgin polymer having a glass transition temperature of greater than 247 degrees Celsius.
Abstract:
The present invention is directed to a tubular article of manufacture in an annular or tubular shape having an outer diameter, an inner diameter and a length comprising one or more materials selected from the group consisting of: a) an immiscible blend of polymers comprising one or more polyetherimides, having more than one glass transition temperature wherein the polyetherimide has a glass transition temperature greater than 217° Celsius; b) a miscible blend of polymers, comprising one or more polyetherimides, having a single glass transition temperature greater than 180° Celsius; or, c) a single polyetherimide having a glass transition temperature of greater than 247° Celsius.
Abstract:
Blends of polysulfones, polyethersulfones and polyphenylene ether sulfones with resorcinol based polyesters, or resorcinol based polyester carbonate polymers, an silicone copolymers have improved flame resistance. Peak heat release energy is reduced and the time to reach peak heat release is increased.
Abstract:
Transparent polycarbonate compositions are made from polycarbonate produced in a base-catalyzed melt polymerization reaction to which an acidic quencher has been added in a 1 to 30-fold molar ratio with respect to the amount of initial basic catalyst; and a potassium perfluoralkane sulfonate and cyclic siloxane containing flameretardant component. In the composition these components work in combination such that the composition achieves a VO UL flammability rating at a thickness of 2.0 mm, preferably 1.6 mm, and has a haze of no more than 1%.
Abstract:
It has now been surprisingly found that addition of a phosphorous-containing oxy acid to a glass-filled polycarbonate composition substantially improves its fire retardant performance. Thus, the present invention provides a method for making a flameretarded glass-filled polycarbonate resin comprising adding to the resin an effective flame-retardant amount of a phosphorous-containing oxy acid. Where appropriate, the melt strength of the polycarbonate is enhanced by the addition of an antidrip agent and the performance can be further enhanced by the addition of a flame retardant. Use of such a composition results in superior fire-retardant performance.
Abstract:
A thermoplastic composition comprises greater than or equal to about 60 wt.% polycarbonate, and about 10 wt.% to about 40 wt.% of a polyimide; wherein weight percents are based on a total weight of the thermoplastic composition.
Abstract:
Natural amorphous silica filler products featuring high brightness, low oil absorption, fine particle size, and low crystalline silica content are described. Methods for making, using, and measuring the properties of the natural amorphous silica filler products are also disclosed. The natural amorphous silica filler products described herein may be useful in a variety of products including, but not limited to, polymers, sealants, paints, caulks, latex, architectural coatings, industrial coatings, pozzolan, glass catalysts, ceramic glazes, and anti-blocking applications.
Abstract:
A fire-resistant polyestercarbonate composition comprises a polyestercarbonate polymer, a polycarbonate polymer, and a salt based flame retardant. The polyestercarbonate polymer comprises a polycarbonate unit and a polyester unit, the polyester unit derived from the reaction of isophthalic acid, terephthalic acid, and resorcinol. The composition can achieve UL94 V0 performance at 0.71 mm thickness. The composition can also maintain physical, mechanical, and processing properties with high loadings of TiO 2 .
Abstract:
A fire-resistant copolyestercarbonate composition is provided comprising a salt-based flame retardant; and a copolyestercarbonate comprising a polycarbonate unit and a polyester unit, the polyester unit derived from the reaction of isophthalic acid, terephthalic acid, and resorcinol, the copolyestercarbonate containing from about 10 mole percent to 99.9 mole percent of the polyester unit. The composition also has improved scratch resistance and may be transparent.
Abstract:
A thermoplastic composition comprising in combination a dialkyl bisphenol polycarbonate homopolymer or copolymer comprising repeat carbonate units having the following structure; wherein R 1 and R 2 are independently at each occurrence a C 1 -C 4 alkyl, n and p are each an integer having a value of 1 to 4, and T is selected from the group consisting of C 5 -C 10 cycloalkanes attached to the aryl groups at one or two carbons, C 1 -C 5 alkyl groups, C 6 -C 13 aryl groups, and C 7 -C 12 aryl alkyl groups; a flame retardant; and an anti-dripping agent is disclosed. The compositions have excellent scratch resistance as well as an improved balance of physical properties such as melt flow, while at the same time maintaining their good flame performance.