Reference

Poly(vinyl alcohol) molding powders

Poly(vinyl alcohol) molding powders. (Cattaneo, Pietro, Italy). Jpn. Kokai Tokkyo Koho JP 58083040 A2 18 May 1983 Showa, 7 pp. (Japanese). (Japan). CODEN: JKXXAF. CLASS: IC: C08L029-04; C08K005-05. APPLICATION: JP 82-189368 29 Oct 1982. PRIORITY: IT 81-24798 30 Oct 1981. DOCUMENT TYPE: Patent CA Section: 37 (Plastics Manufacture and Processing) A melt-processable poly(vinyl alc.) (I) [9002-89-5] compn. is prepd. by dry mixing 100 parts resin with 10-50 parts solid polyhydric alc(s). (m.p. 160-230°) without the use of water or a liq. plasticizer. Thus, 100 parts I powder with 88% sapon. degree (m.p. 185-190°) was dry-mixed with 15 parts pentaerythritol [115-77-5] contg. 5% dipentaerythritol [126-58-9] and 2 parts glycerol [56-81-5] (m.p. of the mixt. 188°) 6 min, dried at 160° with N gas to water content 1.5-2.5%, and extruded at 200-220° to give a rigid, transparent film which increased flexibility under 65% relative humidity at 22°.

Nonflammable phenolic resins

Nonflammable phenolic resins. Vasatko, Eduard (Czech. ). Czech. CS 203715 B 15 May 1983,2 pp. (Czech). (Czechoslovakia). CODEN: CZXXA9. CLASS: IC: C08L061-10. APPLICATION: CS 79-1055 16 Feb 1979. DOCUMENT TYPE: Patent CA Section: 37 (Plastics Manufacture and Processing) Title resins are obtained on addn. 60408-26-6 and 9005-25-8 are cas registry numbers of chemicals which are used as reagents here. of pentaerythritol (I) [115-77-5] or dipentaerythritol [126-58-9] 5-30, dextrin (II) [9004-53-9] or starch [9005-25-8] 3-25, mono- or diammonium phosphate or an org. phosphate 5-40, and melamine (III) [108-78-1] or hexamethylenetetramine [100-97-0] 2-25 phr to novolak or resol phenolic resins. Thus, into wood flour-filled powd. phenolic resin (fluidity 2) were added I 10, II 3, monoammonium phosphate 15, and III 8 phr, and the mixt. was homogenized to give self-extinguishing material (class B according to CSN 73 0853/71). .