Reference

Phenol-ketone condensation products

Phenol-ketone condensation products. Szabolcs, Otto (Isovolta Oesterreichische Isolierstoffwerke A.-G., Austria). U.S. US 4467122 A 21 Aug 1984, 4 pp. Cont.-in-part of U.S. Ser. No. 250,669, abandoned. (English). (United States of America). CODEN: USXXAM. CLASS: IC: C07C037-20. NCL: 568727000. APPLICATION: US 82-379433 18 May 1982. PRIORITY: US 79-83609 11 Oct 1979; US 81-250669 3 Apr 1981. DOCUMENT TYPE: Patent CA Section: 37 (Plastics Manufacture and Processing) A process is provided for prepn. of bisphenols, for prodn. of polyesters, by condensation of phenols with ketones in the presence of gaseous HCl by addn. of a catalytic amt. of bivalent, trivalent, or tetravalent metal halide. Thus, 30 mols phenol [108-95-2] contg. 9% water was stirred in an autoclave and 2 mols. ZnCl2 and 10 mols fluorenone [486-25-9] was dissolved therein. Then 10 mols gaseous HCl was added, and the mixt. was heated 1 h at 80° and 3 h at 70°. The mixt. was dissolved in 5 L iso-PrOH at 60° and poured into a 10-fold vol. of water to ppt. 9,9-bis(4-hydroxyphenyl)fluorene [3236-71-3] in 97% yield.

Tough, transparent heat- and flame-resistant thermoplastics via silicone block-modified bisphenol fluorenone polycarbonate

Tough, transparent heat- and flame-resistant thermoplastics via silicone block-modified bisphenol fluorenone polycarbonate. Kambour, R. P.; Corn, J. E.; Miller, S.; Niznik, G. E.In this study， 75-44-5 and 3236-71-3 are also used. (Chem. Lab., Gen. Electr. Co., Schenectady, N. Y., USA). J. Appl. Polym. Sci., 20(12), 3275-93 (English) 1976. CODEN: JAPNAB. DOCUMENT TYPE: Journal CA Section: 36 (Plastics Manufacture and Processing) The block copolymers were synthesized by interfacial condensation of phosgene [75-44-5] with various mixts. of silicone oligomers capped with bisphenol fluorenone (I) [3236-71-3], and free I or its monosodium salt, and contained 7-27% silicone blocks of no.-av. d.p. 10-40 which were cast as clear, colorless films. Each resin had 2 glass temps., one at .apprx.-100.degree. for the silicone microdomains, and the other at .ltoreq.275.degree. for the polycarbonate matrix. Although the I polycarbonate is brittle, block polymers with .gtoreq.10% silicone yield by shear deformation before breaking and the ultimate elongations are increased by preorientation at silicone contents >15%. The ultimate tensile elongation, impact toughness, and plane strain-stress intensity factors increased with increasing silicone content, through a stress whitening mechanism, and at higher silicone contents, shear deformation increased the tensile elongation and impact toughness. The flame resistance of the resins exceeded that of any known nonhalogenated resins, and heat distortion temps. .gtoreq.200.degree. were obsd. Resins contg. 15-20% silicone were tough, transparent, heat- and flame-resistant engineering plastics, extrudable and injection-moldable with only minor changes in color, transparency, and strength properties. .