Inherently light-and-heat-stabilized polyamide and method of making the same
AssigneeBASF SE
InventorsOtto M. Ilg, Ulrike Breiner, Manfred Juluis
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Abstract
An inherently light- and heat-stabilized polyamide has at least one piperidine compound bonded to the backbone polymer chain and at least one 4-amino-2,2,6,6-tetramethylpiperidine compound bonded to the backbone polymer chain. The inherently light- and heat-stabilized polyamide may be used to form articles such as, for example, fibers, carpets, yarns, and textile fabrics.
Claims33
A method of making an inherently light- and heat-stabilized polyamide comprising subjecting polyamide-forming monomers to a polymerization process in the presence of (a) an effective amount of at least one piperidine compound represented by formula (I):
- ##STR17## wherein R.sub.1 is hydrogen, benzyl, or a C.sub.1 -C.sub.20 alky, R.sub.2 -R.sub.5 are each hydrogen or the same or a different C.sub.1 -C.sub.6 alkyl, X has n free valance bonding sites and is an alkyl or substituted alkyl having from about 1 to about 30 carbon atoms or an aryl or substituted aryl having from about 6 to about 20 carbon atoms, m is 0 or 1, --C(O)--R.sub.6 is a group that forms an amide bond together with an amine, and n is equal to 1, 2, or 3 and (b) an effective amount of at least one 4-amino-2,2,6,6-tetramethylpiperidine compound represented by formula (II):
- ##STR18## wherein R.sub.7 is hydrogen, benzyl, or a C.sub.1 -C.sub.20 alkyl.
An inherently light- and heat-stabilized polyamide comprising:
- (a) a backbone polymer chain having two chain ends;
- (b) at least one piperidyl radical chemically bonded to one end of the backbone polymer chain of the inherently light- and heat-stabilized polyamide, the at least one piperidyl radical represented by formula (III):
- ##STR19## wherein R.sub.1 is hydrogen, benzyl, or a C.sub.1 -C.sub.20 alkyl, R.sub.2 -R.sub.5 are each hydrogen or the same or a different C.sub.1 -C.sub.6 alkyl, X has n free valance bonding sites and is an alkyl or substituted alkyl having from about 1 to about 30 carbon atoms or an aryl or substituted aryl having from about 6 to about 20 carbon atoms, m is 0 or 1, and n is equal to 1, 2, or 3;
- and
- (c) at least one 4-amino-2,2,6,6-tetramethylpiperidyl radical chemically bonded to the other end of the backbone polymer chain of the inherently light- and heat-stabilized polyamide, the at least one 4-amino-2,2,6,6-tetramethylpiperidyl radical represented by formula (IV):
- ##STR20## wherein R.sub.7 is hydrogen, benzyl, or a C.sub.1 -C.sub.20 alkyl.
Dependencies are inferred from the claim text.