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September 1991 Additives for Polvmers
US 5,021,478 STABILIZED COMPCSITIONS Ciba-Geigy Corp. Priority Date: 14 February 1990
Compounds containing both UV absorber and l-hydrocarbyloxy hindered amine moieties.
US 5,021,479
US C&021,577
STABILIZERS Ciba-Geigy Corp. Priority Date: 12 October 1989
Substituted hydroxylamine ester.
LIGHT STABILIZERS Ciba-Geigy Corp. Priority Date: 14 February 1990
Polysubstituted n-hydrocarbyloxy hindered amines.
PROCESSING
High intensity colour mixers
Littleford Brothers Inc., Florence, Ky, (USA) has introduced a new W-series of high-intensity mixers specially modified for blending colour concentrates.
Various models in the series range from 10 to 2000 litres in capacity, with pricing from $14,000 to $150,000. The W-Series features a newly designed blade con.Quration and discharge system.
PRODUCT INFORMATION
Masterbatch for agricultural films
A masterbatch developed by Mitsubishi Petrochemical for low- density polethylene and ethylene-vinyl acetate copolymer agricultural films contains specially formulated glass filler. The structure is claimed to improve heat retention in greenhouses, thereby increasing plant yields.
The filler has a refractive index similar to that of the host polymer, so the film retains its transparency to visible light but reflects a high proportion of the infrared radiation emitted by the plants. As a result, the inside of the greenhouse stays warm without having to resort to twin-wall sheet or additional heating sources.
01991 Elsevier Science Publishers Ltd. 13
