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US 11,634,605 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.
Claims19
A coated article, comprising:
- a fibrous substrate;
- a first polymeric coating having opposing first and second surfaces, wherein the first surface of the first polymeric coating is secured to at least a portion of a first surface of the fibrous substrate, the first polymeric coating have a coat weight of about 7 g/m2 or less;
- and
- a second polymeric coating secured to the second surface of the first polymeric coating, the second polymeric coating having a coat weight of about 15 g/m2 or less, wherein the second polymeric coating comprises at least about 40 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.
9 more elements
A method of manufacturing a coated article for a container, the method comprising:
- receiving a coated fibrous substrate having inner and outer polymeric layers, wherein a first side of the inner polymeric layer is secured to at least a portion of a surface of the fibrous substrate, wherein at least a portion of the outer polymeric layer is secured to at least a portion of a second side of the inner polymeric layer, wherein the outer polymeric layer has a coat weight of about 15 g/m2 or less, and wherein the outer polymeric layer comprises at least about 40 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
- 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.
11 more elements
Dependencies are inferred from the claim text.