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US 5,260,343 Blowing agent
AdditivesforPolymers
Toray Industries Priority Date: 19 February 1990 Contains a fire retardant halogenated polymer and an auxiliary fire ret~d~t such as sodium antimonate or tin oxide.
Stabilizers
February I994
Degradables US 5,256,711 Degradable plastics Chuo Kagaku Co Priority Date: 4 October 1991 Biodegradable gelatinized starch with biodegradable aliphatic polyester.
a
US 5,260,362 Stabilizer Ciba-Geigy Priority Date: 30 September 1982 Polyole~ns which have been s~bilized with bis-(polyalkylpiperidinyl (amino)-1,3,5tris-(polyalkylpiperidinyl triazines) or (amino)-1,3,5_triazines).
US 5,258,430 Degradable plastics Novamont SpA Priority Date: 7 August 1989 Destructured starch/polymer composition for the manufacture of biodegradable particles,
Colorants
TECHNICAL BRIEFS
US 5,256,728 Pigmented polycarbonate General Electric Co Priority Date: 23 November 1992 Method of preparing a polycarbonate containing a non-coated titanium dioxide pigment.
Intumescent phosphorus-based fire retardants
Blowing agents US 5,258,415 Blowing agent for ~lystyrene BASF Priority Date: 14 November 1991 Expandable polystyrene containing carbon dioxide as blowing agent.
US 5,260,343 Blowing agent BASF Priority Date: 1 January 1993 Low density flexible integral skin polyurethane systems using thermoplastic hydrocarbon microspheres and water as coblowing agent.
In many applications, the utility of the phosphorus compounds as fire retardants is greatly enhanced with other additives, p~icul~ly nitrogen compounds with phosphate salts and phenolic resins with red phosphorus. These synergists appear to contribute to char formation while i~ibiting dripping and burning, analogous to the mechanism observed for many years in intumescent coating systems. Two products have been reviewed in this article. One, useful in polypropylene and other polyolefins, is a new phosphate salt commercially available as Amgard NK by itself or as Amgard NP with a nitrogen synergist (Albright & Wilson). The second, a red phosphorus and phenolic resin combination provides fire retardancy in engineering polymers, including polyamides glass-fibre without and polyesters, reinforcement. Red phosphors masterbat~hes are available in selected polymers under the Amgard CPC name. Plastics Engineering,
10
1993, (NW), 29-31
*1994 Elsevier Science Ltd
Toray Industries Priority Date: 19 February 1990 Contains a fire retardant halogenated polymer and an auxiliary fire ret~d~t such as sodium antimonate or tin oxide.
Stabilizers
February I994
Degradables US 5,256,711 Degradable plastics Chuo Kagaku Co Priority Date: 4 October 1991 Biodegradable gelatinized starch with biodegradable aliphatic polyester.
a
US 5,260,362 Stabilizer Ciba-Geigy Priority Date: 30 September 1982 Polyole~ns which have been s~bilized with bis-(polyalkylpiperidinyl (amino)-1,3,5tris-(polyalkylpiperidinyl triazines) or (amino)-1,3,5_triazines).
US 5,258,430 Degradable plastics Novamont SpA Priority Date: 7 August 1989 Destructured starch/polymer composition for the manufacture of biodegradable particles,
Colorants
TECHNICAL BRIEFS
US 5,256,728 Pigmented polycarbonate General Electric Co Priority Date: 23 November 1992 Method of preparing a polycarbonate containing a non-coated titanium dioxide pigment.
Intumescent phosphorus-based fire retardants
Blowing agents US 5,258,415 Blowing agent for ~lystyrene BASF Priority Date: 14 November 1991 Expandable polystyrene containing carbon dioxide as blowing agent.
US 5,260,343 Blowing agent BASF Priority Date: 1 January 1993 Low density flexible integral skin polyurethane systems using thermoplastic hydrocarbon microspheres and water as coblowing agent.
In many applications, the utility of the phosphorus compounds as fire retardants is greatly enhanced with other additives, p~icul~ly nitrogen compounds with phosphate salts and phenolic resins with red phosphorus. These synergists appear to contribute to char formation while i~ibiting dripping and burning, analogous to the mechanism observed for many years in intumescent coating systems. Two products have been reviewed in this article. One, useful in polypropylene and other polyolefins, is a new phosphate salt commercially available as Amgard NK by itself or as Amgard NP with a nitrogen synergist (Albright & Wilson). The second, a red phosphorus and phenolic resin combination provides fire retardancy in engineering polymers, including polyamides glass-fibre without and polyesters, reinforcement. Red phosphors masterbat~hes are available in selected polymers under the Amgard CPC name. Plastics Engineering,
10
1993, (NW), 29-31
*1994 Elsevier Science Ltd