Patent US2557120A successfully refreshed from Google Patents.
US3616191A
Expired / Lapsed
US
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Low temperature extrusion primer
Assignee: Morton International LLC
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Filing: 1967-11-29
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Granted: 1971-10-26
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Expires: 1987-11-29
Abstract
Abstract A method of obtaining improved adhesion of extruded olefin polymer coating materials to packaging material substrates, involving the use of a hydrolyzed copolymer of an olefin and ester of an unsaturated alcohol, e.g., an ethylene-vinyl acetate copolymer, or isocyanate reaction product thereof, as an adhesion improving primer or tie coat which permits extrusion of the coating material onto the primed surface at a lower temperature than ordinarily required, resulting in a better bond of coating material to substrate than ordinarily obtained at those lower temperatures.
Inventors
- 👤 James J Fuerholzer
- 👤 Neal G Reddeman
- 👤 Samuel Zweig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:46
CPC Classifications
B; B32; B32B; B32B27/00; B32B15/00; B32B15/04; B32B15/08; B32B15/085; B32B15/20; B32B23/00; B32B23/04; B32B23/08; B32B23/20; B32B27/06; B32B27/08; B32B27/10; B32B27/30; B32B27/304; B32B27/308; B32B27/32; B32B27/322; B32B27/34; B32B27/36; C; C08; C08J; C08J7/00; C08J7/04; C08J7/0427; B32B2250/00; B32B2250/02; B32B2250/24; B32B2255/00; B32B2255/06; B32B2255/10; B32B2255/12; B32B2255/26; B32B2307/00; B32B2307/30; B32B2307/31; B32B2439/00; B32B2439/40; B32B2439/70; C08J2331/00; C08J2331/02; C08J2331/04; C08J2423/00; C08J2423/02; Y; Y10; Y10T; Y10T428/00; Y10T428/26; Y10T428/269
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
75 words
The method of claim 1 wherein said coating material is selected from the class consisting of polyethylene, polypropylene and copolymers and terpolymers of ethylene or propylene with each other or with a monomer selected from the class consisting of vinyl alcohol and its esters, acrylic acid and substituted acrylic acid and its esters, vinyl chloride, lower olefins in the C2 to C6 range, and halogen containing lower olefins, and ionomers of said copolymers and terpolymers.
Claim 2
Dependent Claim
50 words
The method of claim 1 wherein the resulting product has a bond tensile strength between coating and substrate which is at least 50 grams per inch better than the bond resulting from use of the unhydrolyzed counterpart of said hydrolyzed copolymer in lieu of the hydrolyzed copolymer of the primer.
Claim 3
Dependent Claim
26 words
The method of claim 1 wherein said copolymer is cross linked with an isocyanate in an amount sufficient to improve the chemical resistance of the bond.
Claim 4
Dependent Claim
27 words
The method of claim 1 wherein said copolymer contains between 8 and 50 percent by weight of units of said ester and the remainder being said olefin.
Claim 5
Dependent Claim
30 words
The method of claim 1 in which said primer is applied in an amount of 0.1 to 1.5 pounds of the hydrolyzed copolymer per 3000 square feet of substrate surface.
Claim 6
Dependent Claim
22 words
The method of claim 1 wherein the olefin polymer coating material is applied in a thickness of up to about 2 mils.
Claim 7
Dependent Claim
35 words
The method of claim 1 wherein the olefin polymer coating material is polyethylene applied by extruding from the hot melt at a temperature in the range of from about 375* F. to about 560* F.
Claim 8
Dependent Claim
37 words
The method of claim 1 wherein said primer is applied to the surface of the substrate in the proper amount creating a bond strength of at least about 200 grams per inch on the Instron tensile tester.
Claim 9
Dependent Claim
28 words
The method of claim 9 including the step of permitting the coated substrate to age at ambient conditions for 24 hours prior to testing for said tensile strength.
Claim 10
Dependent Claim
28 words
The method of claim 9 including the step of permitting the coated substrate to age at ambient conditions for 3 weeks prior to testing for said tensile strength.
Claim 11
Dependent Claim
19 words
The method of claim 1 wherein the olefin monomer of said hydrolyzed copolymer is a C2 to C8 olefin.
Claim 12
Dependent Claim
49 words
The method of claim 1 wherein said hydrolyzed copolymer is a hydrolyzed copolymer of vinyl acetate and ethylene containing from about 15 percent to about 30 percent by wEight vinyl acetate units, with from about 3 percent to about 40 percent of the acetate groups hydrolyzed to hydroxyl groups.
Claim 13
Dependent Claim
165 words
The method of claim 1 wherein the hydrolyzed copolymer is an interpolymer having the structure of (C2H4)x (C2H3OH)y (C2H3OCOCH3)z wherein x, y, and z are positive rational numbers greater than zero, the ratio on a weight basis of x to y being greater than about 5:1, and the ratio of x to z being within the range of from about 1:1 to about 10:1, and said olefin polymer is a member of the group consisting of polyethylene, polypropylene, copolymers of ethylene and propylene with each other or with vinyl acetate, acrylic acid, methacrylic acid, methyl acrylate, ethyl acrylate, isobutyl acrylate, vinyl chloride, methyl methacrylate, tetrafluoroethylene, and butene-1 respectively, ionomers of ethylene-acrylic acid copolymers, and ethylene-ethyl acrylate-acrylic acid terpolymers, wherein all of said copolymers have a predominant proportion of olefinic monomer, said film having a thickness of from about 0.1 to about 10 mils and being extruded at a temperature taken at the adapter or die lands of the extruder of less than about 560* F.
Claim 14
Dependent Claim
11 words
The method of claim 14 wherein the polyolefin film is polyethylene.
Claim 15
Dependent Claim
11 words
The method of claim 14 wherein the polyolefin film is polypropylene.
Claim 16
Dependent Claim
17 words
The method of claim 14 wherein the polyolefin film is a copolymer of ethylene and vinyl acetate.
Claim 17
Dependent Claim
17 words
The method of claim 14 wherein the polyolefin film is an ionomer of ethylene and acrylic acid.
Claim 18
Independent Claim
202 words
A method of adhering a polyolefin film to a packaging substrate to provide an improved polymer coated product comprising: a. coating a packaging substrate with the reaction product of i. an interpolymer having the structure of (C2H4)x (C2H3OH)y (C2H3OCOCH3)z wherein x, y, and z are positive rational numbers greater than zero, the ratio on a weight basis of x to y being within the range of from about 5:1 to about 70:1 , and the ratio of x to z being within the range of from about 1:1 to about 10:1, and ii. an organic isocyanate, b. extruding onto said coated substrate a film which is a member of the group consisting of polyethylene, polypropylene, copolymers of ethylene and propylene with each other or with vinyl acetate, acrylic acid, methacrylic acid, methyl acrylate, ethyl acrylate, isobutyl acrylate, vinyl chloride, methyl methacrylate, tetrafluoroethylene, and butene-1 respectively, ionomers of ethylene-acrylic acid copolymers and ethylene-ethyl acrylate-acrylic acid terpolymers, wherein all of said copolymers have a predominant proportion of olefinic monomer, said film having a thickness of from about 0.1 to about 10 mils and being extruded at a temperature taken at the adapter or die lands of the extruder of less than about 560* F.
Claim 19
Dependent Claim
11 words
The method of claim 19 wherein the polyolefin film is polyethylene.
Claim 20
Dependent Claim
11 words
The method of claim 19 wherein the polyolefin film is polypropylene.
Claim 21
Dependent Claim
17 words
The method of claim 19 wherein the polyolefin film is a copolymer of ethylene and vinyl acetate.
Claim 22
Dependent Claim
18 words
The method of claim 19 wherein the polyolefin film is an ionomer of ethylene and acrylic acid copolymer.
Claim 23
Dependent Claim
40 words
The method of claim 19 wherein the organic isocyanate is selected from the group consisting of alkyl isocyanates, aryl isocyanates, alkyl aryl isocyanates, aryl-alkyl isocyanates, polyalkylene isocyanates, and adducts of an organic isocyanate with aliphatic triols, diols, or mixtures thereof.
Claim 24
Dependent Claim
13 words
The method of claim 19 wherein the organic isocyanate is polymethylene polyphenyl isocyanate.
Claim 25
Dependent Claim
14 words
The method of claim 19 wherein the organic isocyanate is a triol aryl isocyanate.
Claim 26
Dependent Claim
14 words
The method of claim 19 wherein the oRganic isocyanate is a diol aryl isocyanate.
Claim 27
Independent Claim
149 words
A method of adhering a polyethylene film to a packaging substrate to provide an improved polymer coated product comprising: a. coating a flexible substrate with an interpolymer having the structure of (C2H4)x (C2H3OH)y (C2H3OCOCH3)z wherein x, y, and z are positive rational numbers greater than zero, the ratio on a weight basis of x to y being within the range of from about 30:1 to about 70:1 and the ratio of x to z being within the range of from about 2:1 to about 8:1, b. extruding onto said coated substrate an olefin polymer film having a thickness of from about 0.1 to about 10 mils. in which the polymer is selected from the class consisting of polyethylene and a copolymer of ethylene and vinyl acetate, said film being extruded at a temperature taken at the adapter or die lands of the extruder of less than about 525* F.
Claim 28
Independent Claim
188 words
A method of adhering a polyolefin film to a flexible substrate to provide an improved polymer coated product comprising: a. coating a flexible substrate with the reaction product of (i) an interpolymer having the structure of (C2H4)x (C2H3OH)y (C2H3OCOCH3)z wherein x, y, and z are positive rational numbers greater than zero, the ratio on a weight basis of x to y being within the range of from about 30:1 to about 70:1 , and the ratio of x to z being within the range of from about 2:1 to about 8:1, and (ii) an isocyanate selected from the group consisting of alkyl isocyanates, aryl isocyanates, alkyl-aryl isocyanates, aryl-alkyl isocyanates, polyalkylene isocyanates, and adducts of an organic isocyanate with aliphatic triols, diols, or mixtures thereof, b. extruding onto said coated substrate an olefin polymer film having a thickness of from about 0.1 to about 10 mils. in which the polymer is selected from the class consisting of polyethylene and a copolymer of ethylene and vinyl acetate, said film being extruded at a temperature taken at the adapter or die lands of the extruder of less than about 525* F.
Claim 29
Dependent Claim
93 words
A packaging material laminate comprising a substrate layer of packaging material, a primer on the surface of said substrate comprising a hydrolyzed copolymer of an olefin monomer and a vinyl alcohol ester monomer in which copolymer the ratio on a weight basis of hydrolyzed ester to olefin is at least about 1: 70, and a coating adhered to and fused with said primer, said coating consisting essentially of an extruded film of unoxidized and undegraded olefin polymer susceptible to oxidation deterioration at its normal extrusion temperature applied as a melt to said primer.
Claim 30
Dependent Claim
202 words
A composite flexible packaging material structure which comprises in intimate joined lamination: a. a flexible substrate layer, b. an intermediate adhesion promoting layer of an interpolymer having the structure of (C2H4)x (C2H3OH)y (C2H3OCOCH3)z wherein x, y, and z are positive rational numbers greater than zero, the ratio on a weight basis of x to y being within the range of from about 5:1 to about 70:1, and the ratio of x to z being within the range of from about 1:1 to about 10:1, and c. a tightly adhered layer over said intermediate adhesion promoting layer of an extruded film having a thickness of from about 0.1 to about 10 mils, said film being selected from the group consisting of polyethylene, polypropylene, copolymers of ethylene and propylene with each other or with vinyl acetate, acrylic acid, methacrylic acid, methyl acrylate, ethyl acrylate, isobutyl acrylate, vinyl chloride, methyl methacrylate, tetrafluoroethylene, anD butene-1, respectively, ionomers of ethylene-acrylic acid copolymers and ethylene-ethyl acrylate-acrylic acid terpolymers, wherein all of said copolymers have a predominant proportion of olefinic monomer, said film being extruded onto said intermediate adhesion promoting layer at a temperature at the adapter or die lands of the extruder of less than about 560* F.
Claim 31
Dependent Claim
18 words
The composite structure of claim 31 wherein the adhered layer over said intermediate adhesion promoting layer is polyethylene.
Claim 32
Dependent Claim
245 words
A composite flexible packaging material structure which comprises in intimate joined lamination: a. a flexible substrate, b. an intermediate adhesion promoting layer of at least 0.1 lb. per 3,000 sq. ft. of said substrate surface of the reaction product of (i) an interpolymer having the structure of (C2H4)x (C2H3OH)y (C2H3OCOCH3)z wherein x, y and z are positive rational numbers greater than zero, the ratio on a weight basis of x to y being within the range of from about 30.1 to about 70:1, and the ratio of x to z being within the range of from about 2:1 to about 8:1, and (ii) an isocyanate selected from the group consisting of alkyl isocyanates, aryl isocyanates, alkyl-aryl isocyanates, aryl-alkyl isocyanates, polyalkylene isocyanates, and adducts of an organic isocyanate with aliphatic triols, diols, or mixtures thereof, and c. a tightly adhered film over said intermediate adhesion promoting layer of from about 0.1 to about 10 mils, said film being selected from the group consisting of polyethylene, polypropylene, copolymers of ethylene and propylene with each other or with vinyl acetate, acrylic acid, methacrylic acid, methyl acrylate, ethyl acrylate, isobutyl acrylate, vinyl chloride, methyl methacrylate, tetrafluoroethylene, and butene-1 respectively, ionomers of ethylene-acrylic acid copolymers and ethylene-ethyl acrylate-acrylic acid terpolymers wherein all of said copolymers have a predominant proportion of olefinic monomer, said film being extruded onto said intermediate adhesion promoting layer at a temperature at the adapter or die lands of the extruder of less than about 560* F.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-25 | 1975-04-26 | 1975-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-25 | 1979-04-26 | 1979-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-25 | 1983-04-26 | 1983-10-26 | $7700.00 | Window Closed / Lapsed |