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News

Lowilite nickel-based UV stabilizer aids manufacture of agricultural films

Great Lakes Chemical Corporation : 22 October, 2004  (New Product)
Great Lakes Chemical Corp has launched Lowilite Q21, a nickel-based UV stabilizer system, in a dust-free granular form, that lowers the melting point to normal processing temperatures and alleviates dispersion issues in the manufacture of agricultural films.
Great Lakes Chemical Corp has launched Lowilite Q21, a nickel-based UV stabilizer system, in a dust-free granular form, that lowers the melting point to normal processing temperatures and alleviates dispersion issues in the manufacture of agricultural films.

The stabilization of agricultural films is a demanding application for polymer additives. The polyethylene film is expected to survive for several years during which it may be exposed to severe climate conditions and pesticides. Nickel quencher additives have been used successfully for many years to meet these difficult requirements, but possible allergic reactions to the dusty nickel powder and the powder's green colour causing cross-contamination and hygiene issues during polymer manufacture have been of great concern to manufacturers.
The Great Lakes Lowilite Q21 stabilizer system, produced using patented non-dusting blends (NDB) technology, alleviates these concerns with a non-dusting, precise blend of two light stabilizers with Lowilite Q84 nickel quencher and Lowilite 22 UV absorber.
The Lowilite Q21 physical form eradicates the dust problem and resolves two other inherent issues with nickel quencher use -- the high melting point and the resulting difficult dispersion of the nickel quencher in the polymer.
The 'alloy effect' between Lowilite Q84 and Lowilite 22 lowers the melting point of Lowilite Q21 to normal processing temperatures and, together with the pre-dispersion of the nickel quencher within the NDB, leads to greater productivity and higher film quality.
Great Lakes developed the NDB product form in the early 1990s. The blending technology allows several additives to be incorporated into one, dust-free granule or pellet, which is an ideal form for additives that are difficult to handle.
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