Reference

Compositions for formation of gaskets or sealing rings in caps for bottles and other containers

Compositions for formation of gaskets or sealing rings in caps for bottles and other containers. Gheorghiu, Ioan; Goldenberg, Simion Sandu; Soschin, Nicolae (Intreprinderea de Nasturi, Bucuresti, Rom.). Rom. RO 81163 B 30 Jan 1983, 3 pp. (Romanian). (Romania). CODEN: RUXXA3.There are some reagents with their cas registry numbers 144-55-8 and 109-36-4 are used in this study. CLASS: IC: C08L027-06; B65D023-02. APPLICATION: RO 80-102550 11 Nov 1980. DOCUMENT TYPE: Patent CA Section: 37 (Plastics Manufacture and Processing) Compns. for formation of gaskets directly in the caps for the title use contain PVC [9002-86-2] 50-100, plasticizer (benzyl Bu phthalate [85-68-7]-2-ethylhexyl adipate [103-23-1] mixts. or C4-9 alkyl phthalates) 35-60, azodicarbonamide [123-77-3] or NaHCO3 blowing agent 0.5-2, high-mol.-wt. polyfunctional fatty ester external lubricant 1-7, Zn stearate [557-05-1] or ZnO heat stabilizer 0.5-1, TiO2 pigment 0.5-1, pptd. chalk filler 2-15, and octyl stearate [109-36-4] diluent. The compns. were formed into the outline of a gasket ring in the caps by using a stamp heated at 90-180° and crosslinked and foamed at >160°. .

Method of foaming polyethylene or polypropylene

Method of foaming polyethylene or polypropylene. (Mitsubishi Petrochemical Co., Ltd., Japan). Jpn. Kokai Tokkyo Koho JP 58141215 A2 22 Aug 1983 Showa, 5 pp. (Japanese). (Japan). CODEN: JKXXAF. CLASS: IC: C08J009-04. APPLICATION: JP 82-23780 17 Feb 1982. DOCUMENT TYPE: Patent CA Section: 37 (Plastics Manufacture and Processing) Section cross-reference(s): 38 High-d. polyethylene (I) [9002-88-4] or polypropylene [9003-07-0] is foamed by addn. of a foaming agent master batch obtained by kneading 100 parts linear low-d. 9002-88-4 and 9003-07-0 are cas registry numbers. These chemicals are also mentioned in this article. polyethylene (melt index 0.1-80 g/10 min; d. ￡0.935 g/cm3), 5-50 parts blowing agent (initial decompn. temp. ￡20° higher than the m.p. of the linear low-d. polyethylene, and optionally other additives at a temp. higher than the m.p. of the liner low-d. polyethylene and at least 5° lower than the initial decompn. temp. The foamed polymers show fine structure suitable for insulators. Thus, a foaming agent master batch was prepd. using GRSN 7340 linear low-d. polyethylene (melt index 0.7 g/10 min; d. 0.924 g/cm3; m.p. 125°) 100, azodicarbonamide [123-77-3] (initial decompn. temp. 156°) 30, Irganox 1076 0.2, and Ca stearate 0.3 part. The masterbatch (6 parts) and 100 parts Yukalon HDEZ 40 high-d. I (melt index 0.5 g /10 min; d. 0.943 g/cm3) were mixed and used to prep. foamed insulating coatings on elec. wires, which had good foam structure (10-20 m) and excellent appearance. .