Spinning finishes for synthetic filament fibers
AssigneeHenkel Kommanditgesellschaft auf Aktien
InventorsUlrich Eicken, Raymond Mathis, Norbert Bialas
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Abstract
The invention relates to spinning finishes containing a lubricant of improved biodegradability, the lubricant consisting of block copolyesters. The block copolyesters are produced from hydrophilic polyethylene glycols and hydrophobic diols selected from the group of polypropylene glycols, polytetrahydrofurans, polycaprolactone diols, hydrogenation products of ricinoleic acid esters, 1,2-alkanediols, α,ω-alkanediols and/or dimeric diols and dicarboxylic acids containing 2 to 36 carbon atoms connecting the blocks A) and B), anhydrides thereof, esters thereof with lower alcohols containing 1 to 8 carbon atoms and/or carbonic diesters of lower alcohols containing 1 to 8 carbon atoms.
Claims18
A spinning finish composition for synthetic filament fibers containing a lubricant component having improved biodegradability, said lubricant component consisting of a block copolyester prepared from the blocks A) and B) wherein
- block A) consists of a hydrophilic polyethylene glycol having a weight average molecular weight of 450 to 20,000,
- block B) consists of a hydrophobic diol selected from the group consisting of polypropylene glycols, polytetrahydrofurans, polycaprolactone diols, hydrogenation products of ricinoleic acid esters, and dimeric diols, and wherein said block A) and said block B) are interconnected with aliphatic C2-36 dicarboxylic acids, anhydrides thereof, or esters thereof with lower C1-8 alcohols, or carbonic acid diesters of lower C1-8 alcohols.
The process of lubricating a synthetic filament fiber comprising contacting said filament fiber with a spinning finish composition containing a lubricant component having Improved biodegradability, said lubricant component consisting of a block copolyester prepared from the blocks A) and B) wherein
- block A) consists of a hydrophilic polyethylene glycol having a weight average molecular weight of 450 to 20,000,
- block B) consists of a hydrophobic diol selected from the group consisting of polypropylene glycols, polytetrahydrofurans, polycaprolactone diols, hydrogenation products of ricinoleic acid esters, and dimeric diols, and wherein said block A) and said block B) are interconnected with aliphatic C2-36 dicarboxylic acids, anhydrides thereof, or esters thereof with lower C1-8 alcohols, or carbonic acid diesters of lower C1-8 alcohols.
Dependencies are inferred from the claim text.