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2009
Conference Paper
Titel
Biobased polyurethane dispersions (PUD) for furniture coatings
Abstract
Increased environmental awareness and government restrictions lead to the substitution of solvent-borne coatings by waterborne products and usage of renewable raw materials. Vegetable oils offer a great potential by using the oil itself, fatty acids, glycerol, or chemical modifications thereof. Additionally polymer building blocks have been biotechnologically converted from renewable resources, e.g. glycerol to 1,3-prepanediol. In this study utilization of 1,3-propanediol and modified fatty acids for polyester polyol synthesis has been investigated. These polyols have been converted to polyurethane dispersions with excellent properties regarding chemical, scratch and abrasion resistance. It has been found that petrochemical based 1,6-hexanediol may be substituted by 1,3-propanediol without loosing as much elongation properties and hydrolysis resistance as expected from the chemical structure. Basic formulations of these generated NMP-free polyurethane dispersions (PUD) have been investigated and tested according to the German furniture standard DIN 68861.