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Thermoplastic stabilized against gamma radiation
July I YY7
Additives for Polymers
other resins, without reducing mechanical properties, and is suitable for friction parts such as bearings. WO9616115 Coextrusion of ethylene-based polymer Exxon Chemical Patents Inc. Priority date: 22 November 1994 Coextrusion of an ethylene-based polymer including antioxidants which contain phosphorus provides high adhesion and processThe with low off-taste. ing speed, composition and process are use&l for making a multi-layer packaging construction for semi-liquid or liquid food or solid, beverages. JO8199039 POM with improved slip Asahi Kasei Kogyo KK Priority date: 26 January 1995 A polyoxymethylene (polyacetal) compound with a low coefficient of friction, for use as a sliding material in precision machinery, business machines and automobile parts, can be formulated from polyamide, hindered phenol, aromatic vinyl modified polyethylene and fatty acid ester. It has low coefficient of friction at low temperature and humidity after exposure to conditions of high temperature and humidity.
Stabilizers JO8 109300 Stabilizers for halogen-containing resins Koriyama Kasei KK Priority date: 19 August 1994 Stabilizers for halogen-containing resins can comprise sulphur-containing organotin compounds. They have good colouring resistance at the time of heating, particularly initial colouring resistance. They also have little thiol odour. SU1370952 New polymer stabilizers AS Sibe Novos Organic Chemistry Institute and Novos Pedagogical Institute Priority date: 19 February 1986 New stablilizers for polymers containing
4
bis-((4-hydroxy phenyl)alkyl) sulphide can be prepared by chlorinating with phosphorus chloride or oxychloride, followed by reaction with sodium sulphide. The method gives higher yields (of 74-84%) compared with 30-74% for the usual process. W09616124 and W09616127 Polyorganosiloxane stabilizers Rhone-Poulenc Chimie Priority date: 18 November 1994 Mixed polyorganosiloxanes comprising at least three siloxy units in the molecule can be prepared and employed as stabilizers for organic polymers, with sterically hindered amine tinctions. They have high molecular weight, excellent compatibility with the polymer and give efficient and durable stabilization against the effects of outdoor exposure. US5464893 Thermoplastic stabilized against gamma radiation Bayer AG, Bayer Corporation Priority date: 29 June 1993 A thermoplastic moulding compound can be stabilized against the effects of gamma radiation with a dialkyl and/or dicycloalkyl monosulphide or polysulphide, and an aliphatic or cycloaliphatic monoalcohol or polyalcohol. It is especially usehI in manufacture of medical equipment. Yellowness index is 5 .O, compared with 24 for a comparative sample without the stabilizing agent, (The information given in the above section has been supplied by Derwent Information Ltd, Derwent House, 24 Great Queen Street, London WC2B SDF, UK; tei: +43-l 71 355 2800; fax: +44-171 344 2900. Extended summaries or fkll copies qf the paterlts listed can be obtainedfiom Derwent).
COMPANY NEWS Ciba launches a price-cutting campaign As well as a number of technical innovations
Cc3 1997 Elsevier Science
Additives for Polymers
other resins, without reducing mechanical properties, and is suitable for friction parts such as bearings. WO9616115 Coextrusion of ethylene-based polymer Exxon Chemical Patents Inc. Priority date: 22 November 1994 Coextrusion of an ethylene-based polymer including antioxidants which contain phosphorus provides high adhesion and processThe with low off-taste. ing speed, composition and process are use&l for making a multi-layer packaging construction for semi-liquid or liquid food or solid, beverages. JO8199039 POM with improved slip Asahi Kasei Kogyo KK Priority date: 26 January 1995 A polyoxymethylene (polyacetal) compound with a low coefficient of friction, for use as a sliding material in precision machinery, business machines and automobile parts, can be formulated from polyamide, hindered phenol, aromatic vinyl modified polyethylene and fatty acid ester. It has low coefficient of friction at low temperature and humidity after exposure to conditions of high temperature and humidity.
Stabilizers JO8 109300 Stabilizers for halogen-containing resins Koriyama Kasei KK Priority date: 19 August 1994 Stabilizers for halogen-containing resins can comprise sulphur-containing organotin compounds. They have good colouring resistance at the time of heating, particularly initial colouring resistance. They also have little thiol odour. SU1370952 New polymer stabilizers AS Sibe Novos Organic Chemistry Institute and Novos Pedagogical Institute Priority date: 19 February 1986 New stablilizers for polymers containing
4
bis-((4-hydroxy phenyl)alkyl) sulphide can be prepared by chlorinating with phosphorus chloride or oxychloride, followed by reaction with sodium sulphide. The method gives higher yields (of 74-84%) compared with 30-74% for the usual process. W09616124 and W09616127 Polyorganosiloxane stabilizers Rhone-Poulenc Chimie Priority date: 18 November 1994 Mixed polyorganosiloxanes comprising at least three siloxy units in the molecule can be prepared and employed as stabilizers for organic polymers, with sterically hindered amine tinctions. They have high molecular weight, excellent compatibility with the polymer and give efficient and durable stabilization against the effects of outdoor exposure. US5464893 Thermoplastic stabilized against gamma radiation Bayer AG, Bayer Corporation Priority date: 29 June 1993 A thermoplastic moulding compound can be stabilized against the effects of gamma radiation with a dialkyl and/or dicycloalkyl monosulphide or polysulphide, and an aliphatic or cycloaliphatic monoalcohol or polyalcohol. It is especially usehI in manufacture of medical equipment. Yellowness index is 5 .O, compared with 24 for a comparative sample without the stabilizing agent, (The information given in the above section has been supplied by Derwent Information Ltd, Derwent House, 24 Great Queen Street, London WC2B SDF, UK; tei: +43-l 71 355 2800; fax: +44-171 344 2900. Extended summaries or fkll copies qf the paterlts listed can be obtainedfiom Derwent).
COMPANY NEWS Ciba launches a price-cutting campaign As well as a number of technical innovations
Cc3 1997 Elsevier Science