Lubricants for wire and cable compounds
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Additives for Polvmers September 1990 Polyamide processing aids Elastomeric modifiers for poly0Mi.n filmf3 Lubricants for wire and cable compounds Extruding thermoplastic foams with a non_cFc blowing agent Colour stability of rigid WC Some PVC formulations that contain ammonium octamolybdate can turn a light blue under conditions of combined high humidity and UV exposure. In view of the smoke-suppressing effectiveness of the molybdates, a study was undertaken at the 2 OElsevier Science Publishers Ltd. TECHNICAL NOTES This article, by Union Camp Carp, describes dimer-based polyamide processing aids which have the potential to overcome the difficulties experienced with both low-molecular weight and polymeric extrusion lubricants. They can be altered to match the base polymer and the processing conditions. Although they have been primarily tested for use with nylons - where they have proved particularly effective - they also have the potential for improving the processing characteristics of extremely hard-to- fabricate materials such as polyimides and the new polymer alloys. PcaSt. Ckmpozmd., 1990,13, (May/June), 109-l 12 Blends of synthetic olefin elastomers can improve the toughness of films, and in some instances can impart sign&ant special properties. These modifiers, produced by tion Chemical Co., are available in the form of bales or crumb and are therefore not suitable for in-line modification of Elms. They are not available as pellets since they agglomerate during storage. The primary end-uses of the elastomeric concentrates are as modifiers of films used in food packaging, heavy-duty bags, drum and box liners, personal care packages, and medical overwraps. Pkrst. Eng., 1990, XL vl, (May), 26-27 Lead stearate has been the lubricant of choice in wire and cable compounds. However, it is a low-bulk-density material prone to dusting, and pelletixed or otherwise nonrespirable forms carry a price premium. A project was undertaken by A-C Performance Additives, Allied Signal Inc, to develop an alternate system. The proposed system is based upon high-acid-value oxidized polyethylene, ester internal lubricants (co-stabilized with lead sulphate), and lead oxide. This article concludes that the economics merit attention. Pla& Compound, 1990,13, (Mar./Apr.), 58 The technology for successfully converting from CFC-12 to commercially available, environmentally safe, and FDA approved HCFC-22, is now fully developed. The processing conditions and physical properties of HCFC-22 blown foams are described in this article. Pltzat. Eng, 1990, XL I?& (May), 29-32
Transcript of Lubricants for wire and cable compounds
Additives for Polvmers September 1990
Polyamide processing aids
Elastomeric modifiers for poly0Mi.n filmf3
Lubricants for wire and cable compounds
Extruding thermoplastic foams with a non_cFc blowing agent
Colour stability of rigid WC
Some PVC formulations that contain ammonium octamolybdate can turn a light blue under conditions of combined high humidity and UV exposure. In view of the smoke-suppressing effectiveness of the molybdates, a study was undertaken at the
2 OElsevier Science Publishers Ltd.
TECHNICAL NOTES
This article, by Union Camp Carp, describes dimer-based polyamide processing aids which have the potential to overcome the difficulties experienced with both low-molecular weight and polymeric extrusion lubricants. They can be altered to match the base polymer and the processing conditions. Although they have been primarily tested for use with nylons - where they have proved particularly effective - they also have the potential for improving the processing characteristics of extremely hard-to- fabricate materials such as polyimides and the new polymer alloys.
PcaSt. Ckmpozmd., 1990,13, (May/June), 109-l 12
Blends of synthetic olefin elastomers can improve the toughness of films, and in some instances can impart sign&ant special properties. These modifiers, produced by tion Chemical Co., are available in the form of bales or crumb and are therefore not suitable for in-line modification of Elms. They are not available as pellets since they agglomerate during storage. The primary end-uses of the elastomeric concentrates are as modifiers of films used in food packaging, heavy-duty bags, drum and box liners, personal care packages, and medical overwraps.
Pkrst. Eng., 1990, XL vl, (May), 26-27
Lead stearate has been the lubricant of choice in wire and cable compounds. However, it is a low-bulk-density material prone to dusting, and pelletixed or otherwise nonrespirable forms carry a price premium. A project was undertaken by A-C Performance Additives, Allied Signal Inc, to develop an alternate system. The proposed system is based upon high-acid-value oxidized polyethylene, ester internal lubricants (co-stabilized with lead sulphate), and lead oxide. This article concludes that the economics merit attention.
Pla& Compound, 1990,13, (Mar./Apr.), 58
The technology for successfully converting from CFC-12 to commercially available, environmentally safe, and FDA approved HCFC-22, is now fully developed. The processing conditions and physical properties of HCFC-22 blown foams are described in this article.
Pltzat. Eng, 1990, XL I?& (May), 29-32
