Articles Formed From Polypropylene Prepared with a Single-Site Catalyst and Poly(hydroxyl carboxylic acid) Blends

Abstract

A resin composition comprising at least 0.1% by weight of poly(hydroxy carboxylic acid) and at least 50% by weight of polypropylene prepared with a single-site catalyst, preferably with a metallocene catalyst.

1 - 13 . (canceled) 
     
     
         14 . An article formed from a resin composition comprising at least 0.1% by weight of poly(hydroxy carboxylic acid) and at least 50% by weight of polypropylene prepared with a single-site metallocene catalyst. 
     
     
         15 . The article of  claim 14 , wherein the article is a thermoformed article, a blow molded article, an injection stretch blow molded article, an injection blow molded article, an extrusion blow molded, a rotational molded article, a foamed article, an extruded sheet, or a fiber. 
     
     
         16 . The article of  claim 14 , wherein the article is a monolayer article. 
     
     
         17 . The article of  claim 14 , wherein the article is a multilayer article, and wherein at least one of the layers comprises the resin composition. 
     
     
         18 . The article of  claim 14 , wherein the article is an injection stretch blow molded article, and wherein the resin composition exhibits a melt flow index ranging from 1.5 dg/min to 30 dg/min. 
     
     
         19 . The article of  claim 14 , wherein the article is a blow molded article, and wherein the resin composition exhibits a melt flow index ranging from 0.3 dg/min to 3.0 dg/min. 
     
     
         20 . The article of  claim 14 , wherein the article is an extruded sheet, and wherein the resin composition exhibits a melt flow index ranging from 2.0 dg/min to 10 dg/min. 
     
     
         21 . The article of  claim 14 , wherein the article is an injection molded article, and wherein the resin composition exhibits a melt flow index ranging from 10 dg/min to 100 dg/min. 
     
     
         22 . The article of  claim 14 , wherein the resin composition is free of compatibiliser for compatibilising polypropylene and poly(hydroxy carboxylic acid). 
     
     
         23 . The article of  claim 14 , wherein the polypropylene is isotactic. 
     
     
         24 . The article of  claim 14 , wherein a molecular weight distribution of the polypropylene resin is at most 5. 
     
     
         25 . The article of  claim 14 , wherein the poly(hydroxy carboxylic acid) is poly(lactic acid). 
     
     
         26 . The article of  claim 14 , wherein the poly(lactic acid) is a copolymer and the comonomers are chosen from one or more of:
 aliphatic hydroxy carboxylic acids selected from glycolic acid, 3-hydroxybutyric acid, 4-hydroxybutyric acid, 4-hydroxyvaleric acid, 5-hydroxyvaleric acid, 6-hydroxycaproic acid and combinations thereof; and   aliphatic polyesters of dihydric alcohols and dibasic carboxylic acids.   
     
     
         27 . The article of  claim 14 , wherein the single-site metallocene catalyst comprises: dimethylsilyl-bis(2-methyl-4-phenylindenyl)zirconium dichloride, dimethylsilyl-bis(2-methylindenyl)zirconium dichloride, dimethylsilyl-bis(2-methyl-4,5-benzoindenyl)zirconium dichloride, isopropylidene(cyclopentadienyl)(fluorenyl)zirconium dichloride, isopropylidene(2-methyl-4-tert-butyl-cyclopentadienyl)(fluorenyl)zirconiu-m dichloride, isopropylidene(2-methyl-4-tert-butyl-cyclopentadienyl)(3,6-di-tert-butyl-fluorenyl)zirconium dichloride, or combinations thereof. 
     
     
         28 . The article of  claim 14 , wherein the resin composition comprises: from 0.1 to 49.9 wt % of the poly(hydroxy carboxylic acid) and from 50 to 99.9 wt % of the polypropylene. 
     
     
         29 . The article of  claim 14 , wherein the resin composition comprises: from 0.1 to 30 wt % of the poly(hydroxy carboxylic acid) and from 70 to 99.9 wt % of the polypropylene. 
     
     
         30 . The article of  claim 14 , wherein the resin composition comprises: from 0.1 to 20 wt % of the poly(hydroxy carboxylic acid) and from 80 to 99.9 wt % of the polypropylene. 
     
     
         31 . The article of  claim 14 , wherein the resin composition comprises: from 0.1 to 15 wt % of the poly(hydroxy carboxylic acid) and from 85 to 99.9 wt % of the polypropylene. 
     
     
         32 . The article of  claim 14 , wherein the resin composition comprises: from 0.1 to 10 wt % of the poly(hydroxy carboxylic acid) and from 90 to 99.9 wt % of the polypropylene.