摘要:
This invention deals with the development of improved SMT performance flame retardant polyamide compositions. The compositions include replacing the poly bromostyrene or brominated polystyrene with a copolymer of a halostyrene and glycidyl(meth)acrylate. The resulting composition results in greatly improved blistering performance in Surface Mounting Technology Applications.
摘要:
The polyester-based resin composition of the present invention comprises a melt blend (C) consisting of a polyamide resin (A) and a polyester resin (B). The polyester-based resin composition satisfies the following formulas 1 and 2: P×C/100≦25 (1) Y/X×100≧90 (2) wherein P is a concentration, ppm, of a phosphorus compound in the polyamide resin (A) in terms of phosphorus atom; C is a content, % by mass, of the polyamide resin (A) in the melt blend (C); X is a lightness of a 2-mm thick plate which is molded only from the polyester resin (B); and Y is a lightness of a 2-mm thick plate which is molded from the melt blend (C). By regulating the phosphorus concentration and the polyamide resin (A) content so as to meet the limitation of formula 1, the polyester-based resin composition and a shaped article or packaging container made thereof are effectively prevented from the darkening due to the deposition of antimony metal despite the blending of a polyamide resin, thereby attaining a high clearness as defined by formula 2.
摘要:
This invention relates to blends of nylon homopolymers and copolymers with poly(hydroxyamino ether) polymers. More particularly, there are provided blends of nylon 6 and its copolymers with poly(hydroxyamino ether) which form films having high miscibility, high clarity and good processability.
摘要:
Compounds with both vinyl ether and carbamate, thiocarbamate or urea functionality are suitable for use in microelectronics applications and show enhanced adhesive strength compared to compounds that do not contain carbamate, thiocarbamate or urea functionality.
摘要:
A heat-resistant engineering-plastic composition that satisfies a soldering-heat resistance of 260° C. for 10 to 60 secs., that is less costly, that is free of problems in injection molding process, and that is excellent in heat-aging resistance. A heat-resistant molded product made with the heat-resistant engineering-plastic composition, such as a connector mounted on printed circuit board. The heat-resistant molded product is produced by (a) melt-kneading (a1) an engineering plastic either having or introduced an active site for reacting with a specific functional group and (a2) either an organic compound that has both the said specific functional group and a polymerizing functional group in the same molecule or polyolefin that has the said specific functional group described in (a1) to obtain a resin composition, (b) melt-molding the resin composition comprising of (a), and (c) irradiating the melt-molded resin composition with ionizing radiation.
摘要:
The invention relates to a flexible polyamide composition containing at least 50 parts by weight of non-cross-linked rubber per 50 parts by weight of polyamide and the production thereof. The polyamide has a molecular weight such that the melt viscosity at the processing temperature is at most 300 pa.s, preferably at most 200 pa.s. The rubber's Mooney viscosity is at least 40, most preferable is a rubber with a Mooney viscosity of at least 60. The rubber has been functionalized. Preferably a combination of a functionalized and a non-functionalized rubber is used. The rubber particles in the polyamide matrix have a particle size of at most 5 &mgr;m, preferably at most 3 &mgr;m.
摘要:
The polyamide resin composition of the present invention comprises 100 parts by weight of a polyamide resin (A) having dicarboxylic acid units (a) comprising from 60 to 100 mol % of terephthalic acid repeat units and diamine units (b) comprising from 60 to 100 mol % of C6-18 aliphatic alkylenediamine repeat units, and from 1 to 100 parts by weight of a polybromostyrene (B), comprising from 0.5 to 100% by weight of a polybromostyrene having an epoxy group. Molded articles prepared from the polyamide resin composition of the present invention have good flame retardancy, good chemical resistance, good surface appearance and good blistering resistance.
摘要:
A thermoresistance adhesive which does not dissolve in the sealer-composing resins at the sealer molding temperature and is capable of providing a semiconductor chip/lead frame adhesive strength under shear of 1 N/4 mm2 or greater, and including, for example, amide, imide, ester or ether linkage is suited for use in producing thermoresistance adhesive solutions and thermoresistance resin pastes, and the semiconductor chips, lead frames, films, etc., made by using such an adhesive are suited for providing low-cost semiconductor devices.
摘要:
A molded article suitable for direct application of a reflective metal coating includes an amorphous thermoplastic or thermoplastic blend having a glass transition temperature greater than about 170° C. and at least one thermally stable colorant that contributes to the article's dark appearance. The article has excellent dimensional stability, and the surface to which a metal coating can be applied exhibits low gloss. Application of a metal coating to the molded article produces a metalized surface with high total reflectivity, low diffuse reflectivity, and low haze. Compositions and methods for forming the article are described.