April 1994 Additives for Polymers

Multi-purpose peroxides plant

Elf Atochem North America Inc, plans to complete its multipurpose peroxides plant at its existing Crosby, Texas site by the third quarter of 1994. The plant, which will have a capacity of 20 million lbs, will manufacture dialkyl peroxides, including Lupersols 101 and 130, and di-t-butyl peroxide, plus a number of t-amyl peroxyesters, including Lupersol554M75, Lupersol575, Lupersol 546M75, and t-amyl perbenzoate. Contact: Elf Atochem North America Inc. 3 Ben Franklin Parkway, Philadelphia, PA 19102, USA. Tel: +I-215-587-7483.

PATENTS (EUROPEAN)

Fire retardants

wo9325525 Fire retardant Great Lakes Chemical Europe Priority Date: 30 September 1992 N,N’-ethylene bis (tetrabromophthalimide) prepared by reacting ethylene diamine and tetrabromophthalic anhydride in acetic acid.

W09325526 Fire retardant Great Lakes Chemical Europe Priority Date: 30 September 1992 Preparation of ultra-white N,N’-ethylene bis(tetrabromophthalimide) by reacting ethylene diamine and tetrabrombphthalimide in aqueous acetal acid.

Stabilizers

JO531151 UV absorber Osaka Seika Kogyo Priority Date: 11 May 1992 Liquid benzophenone type UV absorber prepared by reacting 2,4-dihydroxy benzophenone with isoamyl bromide in inert solvent in the presence of a deoxidizer.

SU1781223 Rubber oxidative inhibitor University Most Lomonosov Priority Date: 18 February 1991 Derivatives of thiophosphonic acid as oxidative inhibitors in isoprene rubbers.

US5274015 UV absorbers Phillips Petroleum Co Priority Date: 24 November 1992 Sulphur-containing derivatives of hydroxyphenyl benzotriazole.

WG9325612 and W09325613 Stabilizers for chlorine-containing polymers Henkel KGAA Priority Date: 9 June 1992 The stabilizers contain catoites incorporating alkali metal ions and have improved dispersibility.

Plasticizers

SU1781206 Dialkyl phthalate plasticizers As Azerb Inorganic Physical Chemistry Institute Priority Date: 9 July 1990 Production of dialkyl phthalate by reacting phthalic anhydride with octyl or nonyl alcohol with stepwise heating in the presence of an alumina-containing catalyst.

US5274103 Plasticizers US Secretary to the Navy Priority Date: 10 May 1993 1,3,6oxadiazoles containing penta-fluorothio groups.

Curing agents

US5263793 Curing agents for epoxy resins

el994 Elsevier Science Ltd

Additives for Polymers April 1994

Dow Chemical Co Priority Date: 19 August I992 Bi- or tri-functional aromatic amine such as diamine diphenyl sulphone,

Use of nuclear somatic sulphonic acid esters as stabilizer.

Colorants (The information given in the above section has been supplied by Derwent Publications Ltd, Derwent House, 14 Great Queen Street, London, WC2B SDF, UK. Tel: +#4-71-344- 2800. Fax: +44- 71-344-25100.

US 5,272,212

feted sakes or ~11 copies of the p~ents listed can be obtained~om Derwent).

Method of producing coloured spherical particks Nippon Zeon Co Priority Date: 26 September I990 Dissolving or dis~rsing a modi~ed polymer and colouring agent in a polymerizable monomer.

PATENTS (USA) US 5274,010

Fire retardants

Process for warp-free pigmenting of polyolefins Ciba-Giegy

US 5272,193 Fire retardant ~Iy~bonate Bayer

Priority Date: 11 July 1990 (Not abstracted).

Priority Date: 12 July 1991 Contains phosphoric acid esters of phenols or bisphenols, and an antidripping agent.

Blowing agents

US 5272,182

US 5,274,017 Fire retardant polycarbonate General Electric Co Priority Date: 24 November 1989 Contains selected metal oxides.

Blowing agent concentrates General Electric Co Priority Date: 3 December 1992 A blowing agent in a vinyl polymer and a blend of a s~rene/diene block copolymer, and a hydrocarbon rubber extending oil,

Stabilizers US 5,274,007 Blowing agent

US 5272,192 Stabilizer for chlorine-containing polymers Ciba-Geigy

Foam Supplies Inc Priority Date: 10 December 1992 Rigid foams using CHCLF, as blowing agent.

Priority Date: 9 January 1990 Melamine derivatives.

Degradables

US 5274,009 Stabilizing polycarbonate against gamma- rays Bayer Priority Date: 25 September 1992

us 5,274,019 Pro-degradant Robinson Brothers Ltd Priority Date: 25 November 1990 Polyolefin containing carboxylic P-ketones and metal complexes thereof.

‘O1994 Elsevier Science Ltd