Abstract: This invention relates to a polyester composition comprising a blend of:(A) 99.5 to 75 weight % of a copolyester having an inherent viscosity of 0.1 to 1.2 dL/g and having a melting point in excess of 250.degree. C., comprising:(a) one or more dicarboxylic acids, and(b) a glycol component comprising at least 80 mole % 1,4-cyclohexanedimethanol; and(B) 0.5 to 25 weight % of one or more polyalkylene ethers,wherein the weight percentages of all components in said blend total 100 weight %.

Abstract: The use of an amorphous polymer blended with a semicrystalline polymer to render the latter susceptible to adhesion promotion for good peel strength after electroless copper plating, while maintaining the advantages of the semicrystalline polymer including high temperature characteristics, ease of molding, and low cost is disclosed. The invention provides an injection-moldable material with the advantages of a semicrystalline thermoplastic but that can be made to accept electroless metal deposits for fabrication of electronic devices. The material is a blend including a high-temperature semicrystalline thermoplasstic polymer with an amorphous polymer that is easily etched and that is preferably compatible with the semicrystalline polymer. A preferred exemplary blend comprises poly(cyclohexylenedimethylene terephthalate) with polyethersulfone and/or polyarylate.

Abstract: Disclosed is a process for preparing a selectively metallized article, and to the article prepared by this process. The process comprises:1. swelling a polymeric article with dimethylformamide for a length of time of 1 to 5 minutes;2. treating the polymeric article with an aqueous solution of a strong base;3. alternately repeating steps 1 and 2 any number of times;4. etching said polymeric article;5. subjecting polymeric article to electroless copper plating, to obtain said selectively metallized article.

Abstract: Disclosed is a method of rendering polymeric materials hydrophilic by treating the material sequentially with different solvents. The method is especially useful in the preparation of polymeric substrates for etching.

Abstract: A process for producing a thermoplastic material including the steps of molecularly orienting a thermoplastic material, grinding the oriented material to a particle size between about 0.01 to 10 mm and fusing the ground particulate material to substantially mutually adhere the particles thereby producing a sintered thermoplastic material. The fused product includes discrete fused particles of one or more anisotropically oriented thermoplastic polymers and exhibits isotropic increases in flexural modulus.

Abstract: A glass fiber and mica-reinforced polyester composition useful in the production of shaped articles of low warpage is provided by blending(a) about 55% to about 99%, based on total polyester weight, of poly(ethylene terephthalate),(b) about 1% to about 45%, based on total polyester weight, of poly(cyclohexane-dimethylene terephthalate),(c) about 5% to about 50%, based on the total weight of the composition, of glass fibers, and(d) about 5% to about 50%, based on the total weight of the composition, of micathe total glass fiber and mica weight being less than 75% based on the total weight of the composition.

Abstract: The use of a specified molecular weight range of poly(alkylene ether)s, such as poly(ethylene glycol) (PEG), poly(tetramethylene glycol) (PTMG), and poly(propylene glycol) (PPG), and end-capped poly(alkylene ether)s, as plasticizers for polyesters such as poly(ethylene terephthalate) (PET), poly(propylene terephthalate) (PPT), poly(butylene terephthalate) (PBT), poly(ethylene naphthalate) (PEN), and poly(1,4-cyclohexanedimethylene terephthalate) (PCT), that are non-volatile during drying processes as well as during melt processing. Such poly(alkylene ether)s and end-capped poly(alkylene ether)s decrease the melt viscosity of the polymer matrix and depress the glass transition temperature, and thereby improve the processability of polyesters.