Polyether ester carbonates
AssigneeCognis Deutschland GmbH & Co. KG
InventorsPaul Birnbirch, Wolfgang Becker, Norbert Bialas, Rolf Tenhaef, Raymond Mathis
Life of this patent
Estimating the term…
Abstract
A spin finish composition comprising a polyester carbonate corresponding to formula I: wherein R1 and R5 independently of one another represent linear or branched, saturated or unsaturated alkyl groups containing from about 6 to 21 carbon atoms, R2 and R4 independently of one another represent alkyl groups containing from about 2 to 4 carbon atoms, R3 represents a saturated or unsaturated, linear or branched difunctional hydrocarbon radical containing 1 to 22 carbon atoms, k has a value of 0 or 1 to 50, l has a value of 1 to 300, n has a value of 2 to 50 and m has a value of from 2 to 50.
Claims36
A spin finish composition comprising a polyester carbonate corresponding to formula I:
- wherein R1 and R5 independently of one another represent linear or branched, saturated or unsaturated alkyl groups containing from about 6 to 21 carbon atoms, R2 and R4 independently of one another represent alkyl groups containing from about 2 to 4 carbon atoms, R3 represents a saturated or unsaturated, linear or branched difunctional hydrocarbon radical containing 1 to 22 carbon atoms, k has a value of 0 or 1 to 50, l has a value of 1 to 300, n has a value of 2 to 50 and m has a value of from 2 to 50.
A process for lubricating synthetic fibers comprising contacting the fibers with a spin finish composition containing a polyester carbonate corresponding to formula I:
- wherein R1 and R5 independently of one another represent linear or branched, saturated or unsaturated alkyl groups containing from about 6 to 21 carbon atoms, R2 and R4 independently of one another represent alkyl groups containing from about 2 to 4 carbon atoms, R3 represents a saturated or unsaturated, linear or branched difunctional hydrocarbon radical containing 1 to 22 carbon atoms, k has a value of 0 or 1 to 50, l has a value of 1 to 300, n has a value of 2 to 50 and m has a value of from 2 to 50.
A process for making polyester carbonates comprising:
- (a) providing an alkoxylated carboxylic acid corresponding to formula II:
- R6—CO2—(R7O)a—H (II)
- wherein R6 is an alkyl group containing 6 to 21 carbon atoms, R7 is a C2H4 and/or C3H6 group, and a is a number from 2 to 50;
- (b) providing a diol corresponding to formula III:
- HO—R8—OH (III)
- wherein R8 is a difunctional alkyl group containing 1 to 22 carbon atoms;
- (c) providing a dialkyl carbonate corresponding to formula (IV):
- R9O—CO—OR10 (IV)
- wherein R9 and R10 independently of one another represent a methyl or ethyl group;
- and
- (d) reacting (a)-(c), in the presence of a basic catalyst at a temperature of from about 60 to 200° C. to for the polyester carbonate.
Dependencies are inferred from the claim text.