Reference

Polyester compositions with excellent molding characteristics

Polyester compositions with excellent molding characteristics. (Kuraray Co., Ltd., Japan). Jpn. Kokai Tokkyo Koho JP 59022958 A2 6 Feb 1984 Showa, 6 pp. (Japanese). (Japan). CODEN: JKXXAF. CLASS: IC: C08L067-02; C08K005-06; C08K005-09; C08K005-13; C08K005-52. ICI: C08L067-02, C08L071-02. APPLICATION: JP 82-133509 29 Jul 1982. DOCUMENT TYPE: Patent CA Section: 37 (Plastics Manufacture and Processing) Reinforced polyester moldings having excellent dynamic strength are manufd. at mold temps. of less than 100° using compns. of polyester resins comprising >80 mol% ethylene terephthalate repeating groups and having intrinsic viscosity ([h], in 1:1 PhOH/C2H2Cl4 at 30°) >0.4 100, reinforcing fillers 10-140, Na or K salts of C7-25 carboxylic acid or carboxyl group-contg. polymers 0.05-20, poly(C2-4 alkylene glycols) or lower alkyl ethers thereof 0.1-10, and hindered phenol and/or phosphite ester stabilizers 0.01-1 part. Thus, poly(ethylene terephthalate) [25038-59-9] having [h] 0.90 100, ethylene-methacrylic acid copolymer Na salt [25608-26-8] 8, poly(ethylene glycol) di-Me ether (I) [24991-55-7] of av. mol. wt. 1000 3, 1010 (II) [6683-19-8] 0.3, and chopped glass fibers 50 parts were mixed, pelletized, vacuum dried, and then injection molded at die temp. 280° and mold temp. 90° to obtain test specimens, which had excellent surface smoothness, tensile strength 1390 kg/cm2, and flexural strength 1810 kg/cm2, compared with poor surface quality and 1380 and 1810 kg/cm2, resp., for a molding prepd. similarly using a compn. without I, and smooth surfaces and 1300 and 1710 kg/cm2, resp., for moldings prepd. similarly without II.Except for chemicals metioned above, 822-16-2 and 25038-59-9 are also used. .

Thermodynamics of oligomeric binary mixtures of polyethylene glycol and polypropylene glycol methyl ethers

Thermodynamics of oligomeric binary mixtures of polyethylene glycol and polypropylene glycol methyl ethers. Allen, G.; Chai, Z.; Chong, C. L.; Higgins, J. S.; Tripathi, J. (Dep. Chem. Eng. Chem. Technol., Imp. Coll., London SW7, UK). Polymer, 25(2), 239-44 (English) 1984. CODEN: POLMAG. ISSN: 0032-3861. 24991-55-7 and 24991-61-5 which are cas registry numbers of chemicals are mentioned. DOCUMENT TYPE: Journal CA Section: 36 (Physical Properties of Synthetic High Polymers) The heats of mixing and cloud-point curves were detd. for binary mixts. of polyethylene glycol di-Me ether [24991-55-7] and polypropylene glycol di-Me ether [24991-61-5]. The data were discussed in terms of the Flory equation of state theory (1966, 1968), and it was shown that both a temp.- and a concn.-dependent interaction energy term and an interaction entropy term were required. .