Poly(butylene-co-adipate terephthalate), method of manufacture, and uses thereof
AssigneeSaudi Basic Industries Corporation
InventorsHusnu Alidedeoglu, Ganesh Kannan
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Abstract
A method for preparing poly(butylene terephthalate-co-adipate)copolymer includes reacting (i) poly(butylene terephthalate-co-adipate)oligomers, wherein the oligomers comprise at least one polymer residue derived from a polyethylene terephthalate component and a quencher, with (ii) a chain extender under conditions sufficient to form the poly(butylene terephthalate-co-adipate)copolymer.
Claims15
A method for preparing poly(butylene terephthalate-co-adipate) copolymer, the method comprising reacting
- (i) poly(butylene terephthalate-co-adipate) oligomers, wherein the oligomers comprise
- at least one polymer residue derived from a polyethylene terephthalate component selected from the group consisting of polyethylene terephthalate, polyethylene terephthalate copolymers, and combinations thereof, and
- a quencher selected from the group consisting of a phosphorus-containing compound, a nitrogen-containing compound, a boron-containing compound, and combinations thereof, with
- (ii) a chain extender selected from the group consisting of a polyisocyanurate, polyisocyanate, isocyanate, and combinations thereof
- under conditions sufficient to form the poly(butylene terephthalate-co-adipate) copolymer, wherein the copolymer has
- a melting temperature of 100 to 120° C.;
- a number average molecular weight of at least 30,000 g/mole;
- an intrinsic viscosity of at least 1.0 deciliter per minute;
- a Tg of −30 to −10° C., and
- the copolymer comprises a residue derived from the polyethylene terephthalate component.
A method for preparing poly(butylene terephthalate-co-adipate) copolymer having a melting temperature of 100 to 120° C., the method comprising obtaining the poly(butylene terephthalate-co-adipate) oligomers by:
- reacting 1,4-butanediol and adipic acid in the presence of a catalyst under conditions sufficient to form poly(butylene adipate) oligomers;
- adding a polyethylene terephthalate component to the poly(butylene adipate) oligomers in the presence of 1,4-butane diol at atmospheric pressure or greater, at a temperature from 190° C. to 270° C., under an inert atmosphere, under conditions sufficient to depolymerize the polyethylene terephthalate component to form the poly(butylene terephthalate-co-adipate) oligomers;
- and
- adding 0.05 to 1 mole % of a phosphoric acid quencher to the poly(butylene terephthalate-co-adipate) oligomers, based on the moles of catalyst;
- wherein the poly(butylene terephthalate-co-adipate) oligomers are reacted with the chain extender in an amount of 0.01 to 5 weight % under conditions sufficient to form the poly(butylene terephthalate-co-adipate) copolymer having a melt temperature of 100 to 120°, and comprising at least one residue derived from the polyethylene terephthalate component.
A method for preparing poly(butylene terephthalate-co-adipate) copolymer having a melt temperature of 100 to 120° C., the method comprising obtaining the poly(butylene terephthalate-co-adipate) oligomers by:
- reacting
- (i) a polyethylene terephthalate component selected from the group consisting of polyethylene terephthalate, polyethylene terephthalate copolymers, and combinations thereof, with
- (ii) a diol component selected from the group consisting of ethylene glycol, propylene glycol, and combinations thereof, in a reactor at atmospheric pressure or greater, in the presence of a catalyst component, under conditions sufficient to depolymerize the polyethylene terephthalate component into a first molten mixture;
- adding 1,4-butane diol and adipic acid to the molten mixture in the presence of a catalyst component, under conditions sufficient to form a second molten mixture comprising the poly(butylene terephthalate-co-adipate) oligomers;
- and
- adding 0.05 to 1 mole % of a quencher to the poly(butylene terephthalate-co-adipate) oligomers, based on the moles of catalyst;
- wherein the poly(butylene terephthalate-co-adipate) oligomers are reacted with from 0.01-5 weight % based on the total weight of the poly(butylene terephthalate-co-adipate) copolymer of the chain extender under conditions sufficient to form the poly(butylene terephthalate-co-adipate) copolymer having a melt temperature of 100 to 120° C., and comprising a residue derived from the polyethylene terephthalate component.
Dependencies are inferred from the claim text.