[미국특허]
Food cans coated with a composition comprising an acrylic polymer
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B32B-015/08
B65D-075/00
출원번호
UP-0399227
(2006-04-06)
등록번호
US-7858162
(2011-02-24)
발명자
/ 주소
Fuhry, Mary Ann M.
Dudik, John M.
Ambrose, Ronald R.
Niederst, Kenneth W.
출원인 / 주소
PPG Industries Ohio, Inc.
대리인 / 주소
Meyers, Diane R.
인용정보
피인용 횟수 :
11인용 특허 :
10
초록▼
Food cans coated at least in part on the interior with a composition comprising an acrylic polymer and a crosslinker are disclosed. The composition is substantially epoxy-free and substantially polyester-free. The acrylic polymer has a weight average molecular weight of greater than or equal to 41,0
Food cans coated at least in part on the interior with a composition comprising an acrylic polymer and a crosslinker are disclosed. The composition is substantially epoxy-free and substantially polyester-free. The acrylic polymer has a weight average molecular weight of greater than or equal to 41,000 and an acid value of <30 mg KOH/g. Food cans coated at lease in part on the interior with a composition having a tensile strength of greater than 11 MPa are also disclosed.
대표청구항▼
Therefore we claim: 1. A food can coated at least in part on the interior with a composition comprising: (a) greater than 7 wt %, based on total solids weight, of an acrylic polymer having a weight average molecular weight of greater than or equal to 60,000 and an acid value of <30 mg KOH/g; a
Therefore we claim: 1. A food can coated at least in part on the interior with a composition comprising: (a) greater than 7 wt %, based on total solids weight, of an acrylic polymer having a weight average molecular weight of greater than or equal to 60,000 and an acid value of <30 mg KOH/g; and (b) a crosslinker, wherein the composition is substantially epoxy-free and substantially polyester-free. 2. The food can of claim 1, wherein the wt % of acrylic polymer in the composition is 80 to 99 wt %, based on total solids weight. 3. The food can of claim 1, wherein the crosslinker is melamine. 4. The food can of claim 1, wherein the crosslinker is phenolic. 5. The food can of claim 4, wherein the wt % of crosslinker in the composition is less than 10 wt %, based on total solids weight. 6. The food can of claim 1, wherein the composition, when cured, is the last coating applied to the can. 7. The food can of claim 1, wherein the acrylic polymer comprises butyl acrylate, methyl methacrylate, 2-hydroxypropyl methacrylate, 2-ethylhexyl acrylate, methacrylic acid and/or phosphate functional (meth)acrylate. 8. A food can coated at least in part on the interior with a composition comprising an acrylic polymer, wherein the composition has a tensile strength of greater than 11 MPa, as measured by an Instron apparatus. 9. The food can of claim 8, wherein the composition comprises (a) greater than 7 wt %, based on total solids weight, of an acrylic polymer having a weight average molecular weight of greater than or equal to 60,000 and an acid value of <30 mg KOH/g; and (b) a crosslinker, wherein the composition is substantially epoxy-free and substantially polyester-free. 10. The food can of claim 1, wherein the acrylic polymer has phosphate functionality. 11. The food can of claim 10, where the monomers used to form the acrylic polymer comprise phosphate functional (meth)acrylate. 12. The food can of claim 1, wherein the acrylic polymer is formed with only acrylic functional monomers. 13. The food can of claim 1, wherein the composition further comprises a solvent. 14. The food can of claim 1, wherein the acrylic polymer specifically excludes ethylene and components comprising ethylene. 15. The food can of claim 1, wherein the composition specifically excludes transition metals in amounts that would contribute to corrosion control. 16. A food can coated at least in part on the interior with a composition consisting essentially of: (a) an acrylic polymer having a weight average molecular weight of greater than or equal to 41,000 and an acid value of <30 mg KOH/g; and (b) a crosslinker, wherein the acrylic polymer optionally comprises phosphate functionality. 17. The food can of claim 1, wherein the coated portion of the food can comprises a can end. 18. The food can of claim 1, wherein the acrylic polymer has a weight average molecular weight of greater than or equal to 75,000.
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O'Brien, Robert M.; Rardon, Daniel E.; Spynda, Rachael Ann; Bartley, George K.; Evans, Richard H., Coating compositions for aluminum beverage cans and methods of coating same.
O'Brien, Robert M.; Rardon, Daniel E.; Spynda, Rachael Ann; Bartley, George K.; Evans, Richard H., Coating compositions for aluminum beverage cans and methods of coating same.
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O'Brien, Robert M.; Rardon, Daniel E.; Spynda, Rachael Ann; Bartley, III, George K.; Evans, Richard H., Coating compositions for cans and methods of coating.
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