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Croda Universal develops torque and mould release agent for bottled water market
Additives for Polymers
MATERIALS Crompton’s new viscosity modifier for polypropylene Crompton Corporation has developed a new organic peroxide for controlled rheology polypropylene (CR PP). DiTAP@ (di-tertiary-amyl peroxide) is added to the PP resin before the extrusion step and its function is to reduce the molecular weight and hold it within a narrow weight distribution (commonly known as ‘vis-breaking’). DiTAP@ is designed to be a ‘drop-in’ replacement for the current industry standard peroxides for viscosity modification of PP, providing comparable processing times and temperatures, the company says. However, Crompton claims that DiTAP@ is both safer and more cost-efficient than these existing materials. It represents a safer class of peroxide, and it freezes below -5O”C, which eliminates the need to heat peroxide feed tanks and transfer lines in cold climate winters, as is required for some peroxides currently being used. The technically pure product can be transported in 55 gallon drums. Peroxide modifiers in current use decompose to produce tertiary-butyl alcohol (TBA); polymers that contain small amounts of ‘I;BA may be limited in their use for indirect food contact applications. However, according to Croda, polypropylene that is viscosity modified with DiTAP does not contain the TBA impurity. The company further reports an independent study demonstrating that PP ‘vis-broken’ to the same melt flow with DiTAP as with existing peroxides has a significant organoleptic advantage. The polymer has a less intense and more agreeable and pleasant odour, which can offer a value-added advantage for the polypropylene producers and their customers. Contact: Crompton Corp, I American Lane, Greenwich, CT 06831-2559, USA; tel: +1-203552-2000
Croda Universal develops torque and mould release agent for bottled water market Croda Universal has introduced a new additive especially for the closures used for bottled
2
December 2001
water. Incroslip C is a torque and mould release agent which, the company claims, has superior organoleptic properties such as reduced taste, taint and odour, compared with existing products. The dramatic increase in consumption of bottled water has resulted in increasing demand for improved additives. Torque release agents are added to bottle caps and cap liners to facilitate the opening of tightly sealed bottles by consumers. All components of the bottle cap have an influence on the taste, taint and odour of the contents, and these effects are more noticeable after sterilization with ozone. By minimizing the effect from the release agent, Incroslip C marks a step change in organoleptic performance in sensitive applications, Croda says. The additive is vegetablebased, free of genetically modified materials and meets all necessary European and FDA legislation. According to Croda, the key to Incroslip C is its stability. Steps taken to improve stability can often result in worse release performance. The company claims that this is the first time that they have both been achieved together. Another advantage is that Incroslip C can replace existing additives with minimal reformulation, according to the company. Croda believe the additive will find applications in other markets. Contact: Croda International Plc, Cowick Hall, Snaith, Goole, DN14 9AA, UK; tel: +44(0)1405-860551; fax: +44-(0)1405-861767; URL: www. croda. corn
New technologies from Akcros on show at K 2001 Akcros Chemicals, a subsidiary of Akzo Nobel, used K 2001 to exhibit a number of new technologies under development by the company. These include the development of polymer additives in totally non-dusting, melt forms, heavymetal-free stabilization for rigid PVC in onepack systems, and liquid mixed metal stabilizers with a low content of volatile solvents and of free phenol. The new addition to the Lankromark@ range of liquid mixed-metal heat stabilizers is a bariumzinc liquid specifically designed for use in
0200 1 Elsevier Science
MATERIALS Crompton’s new viscosity modifier for polypropylene Crompton Corporation has developed a new organic peroxide for controlled rheology polypropylene (CR PP). DiTAP@ (di-tertiary-amyl peroxide) is added to the PP resin before the extrusion step and its function is to reduce the molecular weight and hold it within a narrow weight distribution (commonly known as ‘vis-breaking’). DiTAP@ is designed to be a ‘drop-in’ replacement for the current industry standard peroxides for viscosity modification of PP, providing comparable processing times and temperatures, the company says. However, Crompton claims that DiTAP@ is both safer and more cost-efficient than these existing materials. It represents a safer class of peroxide, and it freezes below -5O”C, which eliminates the need to heat peroxide feed tanks and transfer lines in cold climate winters, as is required for some peroxides currently being used. The technically pure product can be transported in 55 gallon drums. Peroxide modifiers in current use decompose to produce tertiary-butyl alcohol (TBA); polymers that contain small amounts of ‘I;BA may be limited in their use for indirect food contact applications. However, according to Croda, polypropylene that is viscosity modified with DiTAP does not contain the TBA impurity. The company further reports an independent study demonstrating that PP ‘vis-broken’ to the same melt flow with DiTAP as with existing peroxides has a significant organoleptic advantage. The polymer has a less intense and more agreeable and pleasant odour, which can offer a value-added advantage for the polypropylene producers and their customers. Contact: Crompton Corp, I American Lane, Greenwich, CT 06831-2559, USA; tel: +1-203552-2000
Croda Universal develops torque and mould release agent for bottled water market Croda Universal has introduced a new additive especially for the closures used for bottled
2
December 2001
water. Incroslip C is a torque and mould release agent which, the company claims, has superior organoleptic properties such as reduced taste, taint and odour, compared with existing products. The dramatic increase in consumption of bottled water has resulted in increasing demand for improved additives. Torque release agents are added to bottle caps and cap liners to facilitate the opening of tightly sealed bottles by consumers. All components of the bottle cap have an influence on the taste, taint and odour of the contents, and these effects are more noticeable after sterilization with ozone. By minimizing the effect from the release agent, Incroslip C marks a step change in organoleptic performance in sensitive applications, Croda says. The additive is vegetablebased, free of genetically modified materials and meets all necessary European and FDA legislation. According to Croda, the key to Incroslip C is its stability. Steps taken to improve stability can often result in worse release performance. The company claims that this is the first time that they have both been achieved together. Another advantage is that Incroslip C can replace existing additives with minimal reformulation, according to the company. Croda believe the additive will find applications in other markets. Contact: Croda International Plc, Cowick Hall, Snaith, Goole, DN14 9AA, UK; tel: +44(0)1405-860551; fax: +44-(0)1405-861767; URL: www. croda. corn
New technologies from Akcros on show at K 2001 Akcros Chemicals, a subsidiary of Akzo Nobel, used K 2001 to exhibit a number of new technologies under development by the company. These include the development of polymer additives in totally non-dusting, melt forms, heavymetal-free stabilization for rigid PVC in onepack systems, and liquid mixed metal stabilizers with a low content of volatile solvents and of free phenol. The new addition to the Lankromark@ range of liquid mixed-metal heat stabilizers is a bariumzinc liquid specifically designed for use in
0200 1 Elsevier Science