Impact modified polyester blends

Claim 2

An impact modified linear saturated polyester blend comprising: polymers consisting essentially of; (A) from about 50 to about 86 percent by weight based upon the total polymer weight of the blend of a linear saturated polyester; and (B) from about 14 to about 50 percent by weight based upon the total polymer weight of an impact modifying amount of a combination of (1) from about 10 to about 46 percent based upon the total polymer weight of the blend of an acrylate-containing core-shell polymer having an elastomeric core and a rigid thermoplastic shell; and (2) from 4 to about 8 percent by weight based upon the total polymer of a copolymer of an alpha-olefin having 2 to 8 carbon atoms and a monomer selected from an unsaturated carboxylic acid having 3 to 8 carbon atoms and salts and anhydrides thereof; the ASTM D-256 notched Izod impact value of said blend being greater than that of a blend having either the core-shell polymer or the alpha-olefin copolymer alone in the same amount as said combination.

Claim 3

The blend as recited in claim 1 wherein the linear saturated polyester is poly(ethylene terephthalate).

Claim 4

The blend as recited in claim 1 or 2 wherein the amount of the core-shell polymer is from about 15 to about 46 percent based on the total polymer weight of the blend.

Claim 5

The blend as recited in claim 2 wherein the amount of the core-shell polymer is from about 20 to about 46 percent based on the total polymer weight of said blend.

Claim 6

The blend as recited in claims 1 or 2 wherein the amount of the core-shell polymer is from about 10 to about 46 percent based on the total polymer weight of said blend and wherein the alpha-olefin copolymer is an ethylene-acrylic acid copolymer.

Claim 7

The blend as recited in claim 2 wherein the amount of the core-shell polymer is from about 10 to about 46 percent based on the total polymer weight of said blend and wherein the alpha-olefin copolymer used is an ethylene-acrylic acid copolymer having about 3 to about 20 percent by weight of acrylic acid units based on the weight of the copolymer.

Claim 8

The blend as recited in claim 2 wherein the amount of the core-shell polymer is from about 10 to about 46 percent based on the total polymer weight of said blend and wherein the alpha-olefin copolymer used is an ethylene-acrylic acid copolymer having about 5 to about 10 percent by weight of acrylic acid units based on the weight of the copolymer.

Claim 9

The blend as recited in claim 1 or 2 wherein the amount of the core-shell polymer is from about 10 to about 46 percent based on the total weight of said blend and wherein the alpha-olefin copolymer is an ethylene-methacrylic acid copolymer.

Claim 10

The blend as recited in claim 2 wherein the amount of the core-shell polymer is from about 10 to about 46 percent based on the total polymer weight of said blend and wherein the alpha-olefin copolymer used in an ethylene-methacrylic acid copolymer having about 3 to about 20 percent by weight of methacrylic acid units based on the weight of the copolymer.

Claim 11

The blend as recited in claim 2 wherein the amount of the core-shell polymer is from about 10 to about 46 percent based on the total polymer weight of said blend and wherein the ethylene copolymer used in an ethylene-methacrylic acid copolymer having about 5 to about 10 percent by weight based on the weight of the copolymer.

Claim 12

An impact modified poly(ethylene terephthalate) blend comprising: polymers consisting essentially of; (A) from about 50 to about 89 percent by weight based upon the total polymer weight of the blend of a poly(ethylene terephthalate); and (B) from about 11 to about 50 percent by weight, based upon the total polymer weight of said blend, of an impact modifying amount of a combination of (1) from about 10 to about 49 percent, based upon the total polymer weight of said blend, of an acrylate-containing core-shell polymer having an elastomeric core and a rigid thermoplastic shell; and (2) from about 1 to about 8 percent by weight, based upon the total polymer weight of said blend, of an ethylene-acrylic acid copolymer, or an ethylene-methacrylic acid copolymer, the acid groups of which have been neutralized from 10 to 100 percent by cations of a metal; said ethylene copolymer having at least about 70 mol percent of ethylene units; the ASTM D-256 notched Izod impact value of said blend being greater than that of a blend having either the core-shell polymer of the ethlene copolymer alone in the same amount as said combination.

Claim 13

An impact modified poly(ethylene terephthalate) blend comprising: polymers consisting essentially of; (A) from about 50 to about 89 percent by weight based upon the total polymer weight of the blend of a poly(ethylene terephthalate); and (B) from about 11 to about 50 percent by weight, based upon the total polymer weight of said blend, of an impact modifying amount of a combination of (1) from about 10 to about 49 percent, based upon the total polymer weight of said blend, of an acrylate-containing core-shell polymer having an elastomeric core and a rigid thermoplastic shell; and (2) from about 1 to about 8 percent by weight, based upon the total polymer weight of said blend, of an ethylene-acrylic acid copolymer, or an ethylene-methacrylic acid copolymer, the acid groups of which have been neutralized from 10 to 100 percent by cations of a metal; said ethylene copolymer having at least about 70 mol percent of ethylene units; the ASTM D-256 notched Izod impact value of said blend being greater than that of a blend having either the core-shell polymer of the ethlene copolymer alone in the same amount as said combination.

Claim 14

A blend of claim 11 wherein the cations are calcium, magnesium, zinc or lead cations.

Claim 15

A blend of claim 12 wherein the alpha-olefin copolymer is an ethylene-acrylic acid copolymer.

Claim 16

A blend of claim 12 wherein the alpha-olefin copolymer is an ethylene-methacrylic acid copolymer.

Claim 17

A blend of claim 12 wherein the amount of the acrylic acid units or the methacrylic acid units are present in an amount of from about 3 to about 20 based on the weight of the copolymer.

Claim 18

An impact modifier poly(ethylene terephthalate blend comprising: polymers consisting essentially of; (A) from about 50 to about 89 percent by weight based upon the total polymer weight of said blend of a poly(ethylene terephthalate); and (B) from about 11 to about 50 percent by weight, based upon the total polymer weight of said blend, of an impact modifying amount of a combination of (1) from about 10 to about 49 percent, based upon the total polymer weight of said blend, of an acrylate-containing core-shell polymer having an elastomeric core polymerized from a monomer mixture comprising butyl acrylate and a rigid thermoplastic shell polymerized from a monomer mixture comprising alkyl acrylate wherein alkyl is methyl or ethyl; and (2) from about 1 to about 8 percent by weight based upon the total polymer weight of said blend, of an ethylene-acrylic acid copolymer, or an ethylene-methacrylic acid copolymer, said copolymer is neutralized from 10 to 100 percent with calcium, magnesium, zinc or lead cations; said ethylene copolymer having at least about 70 mole percent of ethylene units; the ASTM D-256 notched Izod impact value of said blend being greater than that of a blend having either the core-shell polymer or the ethylene copolymer alone in the same amount of said combination.

Claim 19

An impact modifier poly(ethylene terephthalate blend comprising: polymers consisting essentially of; (A) from about 50 to about 89 percent by weight based upon the total polymer weight of said blend of a poly(ethylene terephthalate); and (B) from about 11 to about 50 percent by weight, based upon the total polymer weight of said blend, of an impact modifying amount of a combination of (1) from about 10 to about 49 percent, based upon the total polymer weight of said blend, of an acrylate-containing core-shell polymer having an elastomeric core polymerized from a monomer mixture comprising butyl acrylate and a rigid thermoplastic shell polymerized from a monomer mixture comprising alkyl acrylate wherein alkyl is methyl or ethyl; and (2) from about 1 to about 8 percent by weight based upon the total polymer weight of said blend, of an ethylene-acrylic acid copolymer, or an ethylene-methacrylic acid copolymer, said copolymer is neutralized from 10 to 100 percent with calcium, magnesium, zinc or lead cations; said ethylene copolymer having at least about 70 mole percent of ethylene units; the ASTM D-256 notched Izod impact value of said blend being greater than that of a blend having either the core-shell polymer or the ethylene copolymer alone in the same amount of said combination.

Claim 20

A blend of claim 16 wherein the ethylene copolymer acid groups are neutralized from about 30 to about 70 percent and the acrylic acid unit or methacrylic acid unit content is from about 3 to about 20 percent based on the weight of said copolymer.

Claim 21

A blend of claim 17 wherein the blend is filled up to 150 percent based on the weight of the blend.

Claim 22

A blend of claim 17 wherein the filler is glass fiber filler.

Claim 23

An article molded from a blend of claim 1, 2, 5, 8, 11, 12, 17 or 18.