Dapro 5005

Elementis

干燥剂 Drier / Siccative 醇酸树脂 Alkyd Resins 聚亚安酯 Polyurethane 涂层 >> 由溶剂生成 Coatings >> Solventborne combination of xylene and n-butanol Driers for Polyurethanes & Alkyds Dapro® 5005 and 7007 Special Driers for Modified Polyurethanes and Alkyds Dapro 5005 and 7007 are two versions of a chelating catalyst designed to replace cobalt driers where cobalt causes undesirable side effects. Both are hydrolysis resistant to minimize the initial and post-dry color effects normally associated with cobalt. Dapro 5005 is in a combination of xylene and n-butanol for maximum compatibility in conventional solventborne systems. Dapro 7007 has the same activity but is in dipropylene glycol monomethyl ether (DPM) for use in waterborne and HAPS-free systems. Dapro 5005 and 7007 are particularly useful in clear and brightly pigmented oil- or alkyd-modified urethanes and in conventional alkyds which tend to discolor. Special Effects Dapro 5005 and 7007 can be used to: Minimize discoloration of clear polyurethane films Improve initial color of clears, bright whites and light colors Improve alkali resistance of polyurethane films Increase resistance to yellowing of air-dry alkyd finishes exposed to prolonged heat or to alkaline fumes Prevent loss of dry on aging Recommended Levels of Use While either Dapro 5005 or 7007 can be used as a sole drier, optimum results are achieved in combination with calcium and zirconium driers. The suggested starting point as % by weight on total vehicle solids is: 0.5% to 0.7% Dapro 5005 or 7007 0.1% to 0.3% zirconium (as metal) 0.05% to 0.10% calcium (as metal) Special Drier for Modified Polyurethanes and Alkyds. Chelating catalyst designed to replace cobalt driers where cobalt causes undesirable side effects. Hydrolysis resistant to minimize the initial and post-dry color effects normally associated with cobalt. High compatibility in conventional solventborne systems. Particularly useful in clear and brightly pigmented oil- or alkyd-modified urethanes and in conventional alkyds which tend to discolor. Provides minimize discoloration of clear polyurethane films, improves initial color of clears, bright whites and light colors, improves alkali resistance of polyurethane films, increases resistance to yellowing of air-dry alkyd finishes exposed to prolonged heat or to alkaline fumes, prevent loss of dry on aging. Recommended usage levels: While can be used as a sole drier, optimum results are achieved in combination with calcium and zirconium driers.The suggested starting point as % by weight on total vehicle solids is: 0.5% to 0.7% of it, 0.1% to 0.3% of zirconium (as metal), 0.05% to 0.10% of calcium (as metal).