Ethylene copolymer modified polypropylene and shaped articles
View Patent ↗Disclosed are compositions and shaped articles comprising or produced from the compositions. The compositions can comprise (a) at least one polypropylene polymer and (b) at least one E/X/Y copolymer wherein E comprises ethylene; X is a monomer such as vinyl acetate and alkyl (meth)acrylic esters; and Y is one or more additional comonomers such as carbon monoxide; sulfur dioxide; acrylonitrile; maleic anhydride; maleic acid diesters; (meth)acrylic acid, maleic acid, maleic acid monoesters, itaconic acid, fumaric acid, fumaric acid monoester, and salts thereof; glycidyl acrylate, glycidyl methacrylate, and glycidyl vinyl ether in which, based on the E/X/Y copolymer, X is from 0 to 50 weight %, Y is from 0 to 35 weight % of said, X and Y cannot both be 0%, and E is the remainder.
1. A shaped article comprising or produced from a composition which comprises or is produced from at least one polypropylene and 0.2 to 3 weight % of at least one E/X/Y copolymer wherein
the polypropylene includes polypropylene homopolymer; random copolymers or block copolymers of polypropylene and ethylene; and random terpolymers or block terpolymers of polypropylene, ethylene and one other olefin; or combinations of two or more there of; and
E comprises repeat units derived from ethylene; X derives from a monomer including vinyl acetate, alkyl (meth)acrylic ester, or combinations thereof; and Y derives from one or more additional comonomers including carbon monoxide; sulfur dioxide, acrylonitrile, maleic anhydride, maleic acid diester, (meth)acrylic acid, maleic acid, maleic acid monoester, itaconic acid, itaconic acid monoester, fumaric acid, fumaric acid monoester, a salt of any of these acids or esters, glycidyl acrylate, glycidyl methacrylate, glycidyl vinyl ether, or combinations of two or more thereof; X is from 0 to 50 weight % of the E/X/Y copolymer; Y is from 0 to 35 weight % of the E/X/Y copolymer; the weight % of X and Y cannot both be 0; and E is the remainder.
2. The article of claim 1 wherein the composition comprises or is produced from
(a) at least one polypropylene polymer; and
(b) 0.2 to 3 weight % of at least one ethylene/alkyl acrylate copolymer.
3. The article of claim 2 wherein the alkyl acrylate is present in said ethylene/alkyl acrylate copolymer in the range from about 5 to about 40 weight % or from about 10 to about 35 weight %.
4. The article of claim 2 wherein said alkyl acrylate is selected from the group consisting of methyl acrylate, ethyl acrylate, and butyl acrylate, and combinations of two or more thereof.
5. The article of claim 3 wherein said alkyl acrylate is methyl acrylate.
6. The article of claim 3 wherein component (b) is present in an amount of from 0.2 to 1.5 weight %.
7. The article of claim 5 wherein component (b) is present in an amount from 0.2 to 0.5 weight %, or from 0.2 to 1 weight %, or from 0.1 to 0.5 weight %.
8. The article of claim 1 wherein the composition comprises or is produced from additionally (c) from 0.01 to 40 weight % of at least one additional component selected from the group consisting of fillers, delustrants, UV stabilizers, pigments and other additives.
9. The article of claim 8 wherein the alkyl acrylate is methyl acrylate.
10. The article of claim 3 wherein the composition comprises a tubular reactor produced ethylene/alkyl acrylate copolymer.
11. The article of claim 6 wherein the composition comprises a tubular reactor produced ethylene/alkyl acrylate copolymer.
12. The article of claim 9 wherein the composition comprises a tubular reactor produced ethylene/alkyl acrylate copolymer.
13. The article of claim 1 being a molded cap and is optionally produced by thermoforming.
14. The article of claim 3 being a molded cap and is optionally produced by thermoforming.
15. The article of claim 6 being a molded cap and is optionally produced by thermoforming.
16. The article of claim 12 being a molded cap and is optionally produced by thermoforming.
17. The article of claim 14 wherein the article is produced by a melt extrusion process including injection molding, compression molding, blow molding, or profile extrusion.
18. The article of claim 16 wherein the article is produced by a melt extrusion process including injection molding, compression molding, blow molding, or profile extrusion.
19. The article of claim 17 wherein the article is prepared by profile extrusion and optionally includes tubing.
20. The article of claim 18 wherein the article is prepared by profile extrusion and optionally includes tubing.