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US 12,441,893 B2Granted
Metal coated with a functional polypropylene film
AssigneeDow Global Technologies LLC
InventorsHouxiang Tang, David L. Malotky, Nicholas B. Schaffer, Hanze Ying, Bernhard U. Kainz, Cynthia A. Stants, Luqing Qi, Ray E. Drumright, Jonathan F. Mason
Life of this patent
Estimating the term…
Abstract
The present invention relates to an article comprising metal coated with an aqueous dispersion of polyolefin particles as well as metal coated with a polyolefin film arising from this dispersion. More particularly the polyolefin particles of the present invention are predominantly polypropylene particles.
Claims11
A process for preparing a coated metal substrate comprising the steps of:
- a) applying onto a metal substrate an aqueous dispersion composition consisting of:
- i) 1 to 15 weight percent, based on the weight of polymer solids in the dispersion, a fatty acid dispersant of 14 to 60 carbon atoms with an acid value in the range of 60 to 250;
- ii) from greater than 25 weight percent to less than 70 weight percent, based on the weight of polymer solids in the dispersion, an acid functionalized propylene base copolymer with an acid value in the range of 0.5 to 20 and a melting point at or above 130° C. as determined by DSC;
- iii) 15 to 60 weight percent, based on the weight of polymer solids in the dispersion, a non-functionalized propylene-co-alkene base copolymer;
- iv) 2 to 15 weight percent, based on the weight of polymer solids in the dispersion, a functionalized polyolefin wax with an acid value in the range of 25 to less than 60;
- v) a neutralizing agent which is an organic base or volatile base having a boiling point of less than 250° C.;
- and
- vi) water;
- and
- b) curing the composition by heating or allowing the composition to set to produce a cured film having a thickness in the range of 1 μm to 20 μm.
7 more elements
A process for preparing a coated metal substrate comprising the steps of:
- a) applying onto a metal substrate an aqueous dispersion composition consisting of:
- i) 1 to 15 weight percent, based on the weight of polymer solids in the dispersion, a fatty acid dispersant of 14 to 60 carbon atoms with an acid value in the range of 60 to 250;
- ii) from greater than 25 weight percent to less than 70 weight percent, based on the weight of polymer solids in the dispersion, an acid functionalized propylene base copolymer with an acid value in the range of 0.5 to 20 and a melting point at or above 130° C. as determined by DSC;
- iii) 15 to 60 weight percent, based on the weight of polymer solids in the dispersion, a non-functionalized propylene-co-alkene base copolymer;
- iv) 2 to 15 weight percent, based on the weight of polymer solids in the dispersion, a functionalized polyolefin wax with an acid value in the range of 25 to less than 60;
- v) a neutralizing agent which is an organic base or volatile base having a boiling point of less than 250° C.;
- vi) 5 to 30 weight percent, based on the weight of polymer solids in the dispersion, an acid functionalized polyolefin dispersant copolymer with a molecular weight of at least 10,000, as determined by GPC and an acid value between 60 and 250;
- and
- vii) water;
- and
- b) curing the composition by heating or allowing the composition to set to produce a cured film having a thickness in the range of 1 μm to 20 μm.
8 more elements
Dependencies are inferred from the claim text.