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Masterbatches extend the life of polymer greenhouse films
Stabilizers
Masterbatches extend the life of polymer greenhouse films
Cabot's three latest stabilizing masterbatches extend the useful life of polymer greenhouse films. The three latest ultraviolet (UV) stabilizing masterbatches from Cabot Corporation are designed specifically to extend the useful
life of polymer greenhouse films. The PLASADD® grades were developed to meet the high performance requirements for films demanded by the combination of considerable UV exposure, heat build-up and, often, the use of chemicals. Pesticides and fumigation products used in greenhouses can adversely affect the performance of many UV stabilizers so without this balance, the products can be made useless in a very short space of time. All three of the grades can be used to produce films at thicknesses of 50 µm and more, and avoid the use of nickel quenchers which can be harmful to the environment. PE8740 high performance masterbatch was developed for situations requiring long life and strong chemical resistance, particularly to elemental sulphur, without the use of nickel quenchers. The grade is based on a combination of a low interacting hindered amine light stabilizer (HALS) and a UV absorber.
PE8860 is another nickel-free masterbatch which is resistant to agro-chemicals and was developed to provide long-term UV stability. The product is suitable for greenhouse tunnels where sulphur fumigation is not used. Based on a HALS stabilizer system, this grade can make polymer films slightly hazy, which increases light diffusion. For applications requiring medium-term protection against UV radiation together with some chemical resistance, Cabot offers PE8830. Also nickel-free, the product is suitable for greenhouse films which will not be exposed to elemental sulphur. Cabot's other PLASADD grades, PE9136 and PE8052, provide short-term UV protection. The latter is nickel-free while the former offers strong chemical resistance. Contact: Cabot Corporation Tel: +32 16 39 2400 Fax: +32 16 39 2444 Website: www.cabot-corp.com
Protecting PVC profiles in desert regions
Crompton Corporation's Mark® 2289 methyl tin stabilizer is designed to protect against ultraviolet (UV) and heat damage in polyvinyl chloride (PVC) profiles such as window frames. The company says the product is particularly suitable for profiles used in areas exposed to intense sunlight, such as desert regions, and prevents yellowing and chalking. Mark 2289 is a solid, sulphur-free organotin
stabilizer/lubricant and is supplied as a white, free-flowing powder. For polyolefins requiring optimum light stability, the company offers MarkScreen® 1413, a 2-hydroxy-4-n-octyloxybenzophenone regulated for use by the US Food and Drug Administration (FDA). The product can also protect PVC, unsaturated polyesters and other polymers and is supplied in flake or powder form.
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Other stabilizing products based on phenolics, secondary amines, phosphates and thioesters are available in the Ultranox®, Weston® and Genox™ product lines which Crompton acquired from GE Specialty Chemicals during 2003. Contact: Crompton Corporation Website: www.cromptoncorp.com
Plastics Additives & Compounding January/February 2004
Masterbatches extend the life of polymer greenhouse films
Cabot's three latest stabilizing masterbatches extend the useful life of polymer greenhouse films. The three latest ultraviolet (UV) stabilizing masterbatches from Cabot Corporation are designed specifically to extend the useful
life of polymer greenhouse films. The PLASADD® grades were developed to meet the high performance requirements for films demanded by the combination of considerable UV exposure, heat build-up and, often, the use of chemicals. Pesticides and fumigation products used in greenhouses can adversely affect the performance of many UV stabilizers so without this balance, the products can be made useless in a very short space of time. All three of the grades can be used to produce films at thicknesses of 50 µm and more, and avoid the use of nickel quenchers which can be harmful to the environment. PE8740 high performance masterbatch was developed for situations requiring long life and strong chemical resistance, particularly to elemental sulphur, without the use of nickel quenchers. The grade is based on a combination of a low interacting hindered amine light stabilizer (HALS) and a UV absorber.
PE8860 is another nickel-free masterbatch which is resistant to agro-chemicals and was developed to provide long-term UV stability. The product is suitable for greenhouse tunnels where sulphur fumigation is not used. Based on a HALS stabilizer system, this grade can make polymer films slightly hazy, which increases light diffusion. For applications requiring medium-term protection against UV radiation together with some chemical resistance, Cabot offers PE8830. Also nickel-free, the product is suitable for greenhouse films which will not be exposed to elemental sulphur. Cabot's other PLASADD grades, PE9136 and PE8052, provide short-term UV protection. The latter is nickel-free while the former offers strong chemical resistance. Contact: Cabot Corporation Tel: +32 16 39 2400 Fax: +32 16 39 2444 Website: www.cabot-corp.com
Protecting PVC profiles in desert regions
Crompton Corporation's Mark® 2289 methyl tin stabilizer is designed to protect against ultraviolet (UV) and heat damage in polyvinyl chloride (PVC) profiles such as window frames. The company says the product is particularly suitable for profiles used in areas exposed to intense sunlight, such as desert regions, and prevents yellowing and chalking. Mark 2289 is a solid, sulphur-free organotin
stabilizer/lubricant and is supplied as a white, free-flowing powder. For polyolefins requiring optimum light stability, the company offers MarkScreen® 1413, a 2-hydroxy-4-n-octyloxybenzophenone regulated for use by the US Food and Drug Administration (FDA). The product can also protect PVC, unsaturated polyesters and other polymers and is supplied in flake or powder form.
27
Other stabilizing products based on phenolics, secondary amines, phosphates and thioesters are available in the Ultranox®, Weston® and Genox™ product lines which Crompton acquired from GE Specialty Chemicals during 2003. Contact: Crompton Corporation Website: www.cromptoncorp.com
Plastics Additives & Compounding January/February 2004