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US 11,446,908 B2Granted
Polymeric coating compositions and articles coated with the same
AssigneeExxonMobil Chemical Patents Inc.
InventorsLinda M. Van Den Bossche, Joe J. Thoppil, Catherine A. V. Quintin
Life of this patent
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Abstract
Polymeric coating compositions and articles coated with the polymeric coating compositions are provided. The polymeric coating composition can include an ethylene-based polymer that exhibits desirable melting properties and molecular weight distribution. The polymeric coating composition can provide a thin coating layer on an article while still providing advantageous properties, such as seal strength.
Claims18
A coated article, comprising:
- a fibrous substrate;
- and
- at least one polymeric coating layer secured to at least a portion of a first surface of the fibrous substrate, the at least one polymeric coating layer having a coat weight of about 13 g/m2 or less, wherein the at least one polymeric coating layer comprises:
- 1) From about 20 wt % to about 80 wt % of an ethylene-based polymer having:
- a) a melt index of from about 5 g/10 min to about 30 g/10 min;
- b) a melt elastic modulus G′ (G″=500 Pa) at 170° C. below 15 Pa;
- c) a relaxation time lambda at 170° C. below 0.003 s;
- d) at least two second melt temp peaks between 110° C. and 120° C.;
- e) a weight average molecular weight (Mw) of from about 10,000 g/mol to about 55,000 g/mol;
- f) a molecular weight distribution (Mw/Mn) of from about 2.0 to about 5.0;
- and
- g) a Mz/Mw ratio of from about 1.5 to about 2.1;
- and
- 2) from about 20 wt % to about 80 wt % of:
- (i) a low density polyethylene;
- (ii) an ethylene acrylic acid copolymer;
- (iii) an ethyl-methyl acrylate copolymer;
- (iv) a polymer produced by polymerization at a pressure of 50 MPa-g or more;
- (v) an ethylene-methacrylic acid copolymer;
- or (vi) a combination thereof.
17 more elements
A method of manufacturing a coated article for a container, the method comprising:
- receiving a coated fibrous substrate coated with at least one polymeric layer at a coat weight of about 15 g/m2 or less, wherein the at least one polymeric layer comprises:
- 1) From about 20 wt % to about 80 wt % of an ethylene-based polymer having:
- a) a melt index of from about 5 g/10 min to about 30 g/10 min;
- b) a melt elastic modulus G′ (G″=500 Pa) at 170° C. below 15 Pa;
- c) a relaxation time lambda at 170° C. below 0.003 s;
- d) at least two second melt temp peaks between 110° C. and 120° C.;
- e) a weight average molecular weight (Mw) of from about 10,000 g/mol to about 55,000 g/mol;
- f) a molecular weight distribution (Mw/Mn) of from about 2.0 to about 5.0;
- and
- g) a Mz/Mw ratio of from about 1.5 to about 2.1;
- and
- 2) from about 20 wt % to about 80 wt % of:
- (i) a low density polyethylene;
- (ii) an ethylene acrylic acid copolymer;
- (iii) an ethyl-methyl acrylate copolymer;
- (iv) a polymer produced by polymerization at a pressure of 50 MPa-g or more;
- (v) an ethylene-methacrylic acid copolymer;
- or (vi) a combination thereof;
- and
- sealing a first end of the coated fibrous substrate to one of:
- (I) a second end of the coated fibrous substrate;
- (II) a portion of a separate fibrous substrate;
- or (III) a combination thereof, thereby forming a sealed seam of a coated article, wherein the sealed seam has a seal strength of about 6.0 N/15 mm or more as measured by the Seal Strength Test Method.
20 more elements
A coating, comprising:
- at least one polymeric coating layer having a coat weight of about 13 g/m2 or less, wherein the at least one polymeric coating layer comprises:
- 1) from about 20 wt % to about 80 wt % of an ethylene-based polymer having:
- a) a melt index of from about 5 g/10 min to about 30 g/10 min;
- b) a melt elastic modulus G′ (G″=500 Pa) at 170° C. below 15 Pa;
- c) a relaxation time lambda at 170° C. below 0.003 s;
- d) at least two second melt temp peaks between 110° C. and 120° C.;
- e) a weight average molecular weight (Mw) of from about 10,000 g/mol to about 55,000 g/mol;
- f) a molecular weight distribution (Mw/Mn) of from about 2.0 to about 5.0;
- and
- g) a Mz/Mw ratio of from about 1.5 to about 2.1;
- and
- 2) from about 20 wt % to about 80 wt % of:
- (i) a low density polyethylene;
- (ii) an ethylene acrylic acid copolymer;
- (iii) an ethyl-methyl acrylate copolymer;
- (iv) a polymer produced by polymerization at a pressure of 50 MPa-g or more;
- (v) an ethylene-methacrylic acid copolymer;
- or (vi) a combination thereof.
15 more elements
Dependencies are inferred from the claim text.