Reference

Polycarbonate molding composition with improved flame repellancy

Polycarbonate molding composition with improved flame repellancy. Schmidt, Manfred; Cohnen, Wolfgang; Kleiner, Frank; Freitag, Dieter; Idel, Karsten (Bayer A.-G., Ger.). Ger. Offen. DE 2703710 3 Aug 1978, 20 pp. (German). (Germany). CODEN: GWXXBX. CLASS: IC: C08L069-00. APPLICATION: DE 77-2703710 29 Jan 1977. DOCUMENT TYPE: Patent CA Section: 36 (Plastics Manufacture and Processing) N-methyltetrachlorophthalimide (I) [14737-80-5], N,N'-ethylenebis(tetrachlorophthalimide) [31738-06-4], and 2 similar compds. are used with an alkali salt of an org. or inorg. acid, such as K4P2O7, KBF4, K3PO4, or Na 2,5-dichlorobenzenesulfonate [5138-93-2], and, in some cases, PTFE [9002-84-0] as fireproofing agents in polycarbonates. Thus, a bisphenol A-phosgene copolymer [25971-63-5] contg.I 0.25, K4P2O7 0.1, and PTFE (Hostaflon TF 2026) 0.1% has good fire resistance (V-O in UL 94 tests as 1/8 and 1/16th inch samples).

Diphenol monoesters of carboxylic acids for use in preparing poly(ester carbonates) and flame-resistant molding compositions

Diphenol monoesters of carboxylic acids for use in preparing poly(ester carbonates) and flame-resistant molding compositions. Schreckenberg, Manfred; Dhein, Rolf; Rudolph, Hans; Nouvertne, Werner (Bayer A.-G. , Fed. Rep. Ger.). Ger. Offen. DE 3320260 A1 6 Dec 1984, 40 pp. (German). (Germany).Some commonly used reagents like 100-21-0 is used in this experiment. CODEN: GWXXBX. CLASS: IC: C07C069-017; C07C069-353; C07C069-773; C07C069-88; C08G063-64; C08G063-24; C08G063-28; C08L069-00; C08K005-42. APPLICATION: DE 83-3320260 4 Jun 1983. DOCUMENT TYPE: Patent CA Section: 37 (Plastics Manufacture and Processing) Section cross-reference(s): 35 The reaction of a carboxylic acid with a polycarbonate at 150-350° in the presence of a catalysts gives a hydroxy-terminated ester of the acid and the diphenol generated by decompn. of the polycarbonate. The OH terminated esters are used with phosgene in the prepn. of polycarbonate-polyesters with the addn. of an alkali salt of perfluoroalkanesulfonic or arenesulfonic acid to prep. fire-resistant compns. Thus, the reaction of 1.245 kg terephthalic acid [100-21-0] and 1.245 kg isophthalic acid [121-91-5] with 8.100 kg bisphenol A polycarbonate [24936-68-3] at 150-220° in the presence of 7.5 g imidazole gave a mixt. of bis[4-[2-(4-hydroxyphenyl)-2-propyl]phenyl] terephthalate [32115-94-9] and bis[4-[2-(4-hydroxyphenyl)-2-propyl]phenyl] isophthalate [77366-61-1]. This mixt. (2456 kg) was used with 2185 kg bisphenol A and 2722 kg phosgene in the prepn. of a polycarbonate-polyester which had tensile strength 65 MPa, brake elongation 25%, elastic modulus 2160 MPa, notched impact strength 14 kJ/m2, and Vicat softening temp. 155°. This polymer was mixed with 0.1% K perfluorobutanesulfonate [29420-49-3] and 0.5% N-methyltetrachlorophthalimide [14737-80-5] to give a compn. which had fire resistance rating (UL 94 test) V-0 and was self-extinguishing during 2 s.Except for chemicals metioned above, 100-21-0 is also used. ..