US3853592A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Highly stable resin coated paper products and method for making same
Assignee: Eastman Kodak Co
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Filing: 1973-04-04
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Granted: 1974-12-10
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Expires: 1993-04-04
Abstract
Abstract Novel high stability resin coated paper products comprising a core or base of resin stabilizer and/or antioxidant containing paper overcoated with one or more conventional resin layers which are stabilized by migration of the stabilizer or antioxidant from the paper core into the resin layers after application thereof are disclosed. An improved process for making such highly stable resin coated paper products comprising the steps of incorporating the migrating resin stabilizer or antioxidant into the paper core or coating it on the paper core and subsequently overcoating the same with conventional resinous overlayers is also disclosed.
Inventors
- 👤 R Baron
- 👤 I Crawford
- 👤 R Democh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:58
CPC Classifications
D; D21; D21H; D21H21/00; D21H21/14; D21H21/36; D21H19/00; D21H19/10; D21H19/14; D21H19/20; D21H19/22; D21H19/80; D21H19/82; G; G03; G03C; G03C1/00; G03C1/76; G03C1/775; G03C1/79
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
56 words
A HIGH STABILITY RESIN COATED PAPER PRODUCT COMPRISING A PAPER SUBSTRATE, AN ORGANIC STABILIZER ADDITIVE LAYER APPLIED TO AT LEAST ONE SURFACE OF SAID SUBSTRATE, AND A POLYOLEFIN RESIN COATED OVER SAID ADDITIVE LAYER, SAID ORGANIC STABILIZER ADDITIVE BEING CAPABLE OF MIGRATING INTO SAID POLYOLEFIN RESIN TO STABILIZE THE LATTER UNDER AMBIENT CONDITIONS OF NORMAL USE.
Claim 2
Dependent Claim
56 words
A HIGH STABILITY RESIN COATED PAPER PRODUCT COMPRISING A PAPER SUBSTRATE, AN ORGANIC STABILIZER ADDITIVE LAYER APPLIED TO AT LEAST ONE SURFACE OF SAID SUBSTRATE, AND A POLYOLEFIN RESIN COATED OVER SAID ADDITIVE LAYER, SAID ORGANIC STABILIZER ADDITIVE BEING CAPABLE OF MIGRATING INTO SAID POLYOLEFIN RESIN TO STABILIZE THE LATTER UNDER AMBIENT CONDITIONS OF NORMAL USE.
Claim 3
Dependent Claim
16 words
The resin coated paper product of claim 1 wherein said resin is a poly( Alpha -olefin).
Claim 4
Dependent Claim
13 words
The resin coated paper product of claim 2 wherein said resin is polyethylene.
Claim 5
Dependent Claim
36 words
The resin coated paper product of claim 2 wherein said organic stabilizer additive is selected from the group of stabilizers consisting of phenols, mercaptans, sulfides, phosphorus compounds, benzophenone, salts of salicylic acid, benzatriazoles and metal organics.
Claim 6
Dependent Claim
86 words
The resin coated paper product of claim 4 wherein said organic stabilizer additive is present at a density of from about 0.1 to about 2.0 gm/square meter, and is selected from the group consisting of a. 1,3,5-trimethyl-2,4,6-tris(3,5-di-t-butyl-4-hydroxytolyl)benzene, b. 2,2''-thiobis(4-methyl-6-t-butylphenol), c. 2,2''-methylenebis(4-methyl-6-t-butylphenol), d. 4,4''-thiobis(6-t-butyl metacresol), e. octadecyl(3,5-di-t-butyl-4-hydroxyphenyl) acetate, f. 3,5-di-t-butyl-4-hydroxyphenyl orthophosphate, g. 2-naphthyl disulfide, h. n-dodecyl sulfide, i. 2-naphthalenethiol, j. tri(2-ethylhexyl)phosphate, k. tetrakis(nonylphenyl)polypropyleneglycol diphosphite, l. 2-benzimidazolethiol, m. distearyl pentaerythritol diphosphite, n. tricetyl trithio phosphite, o. (2,2''-thiobis(4-tertiary octylphenolato))-n-butylamine nickel (II), p. zinc (II) dibutyl thiocarbonate, and q. 2-hydroxy-4-n-octoxyl-benzophenone.
Claim 7
Dependent Claim
24 words
The resin coated paper product of claim 5 wherein said additive layer has a density of from about 0.2 to about 1.0 gm/square meter.
Claim 8
Dependent Claim
21 words
The resin coated paper product of claim 4 wherein said phenol organic staBilizer additive is a bis phenol or thiobis phenol.
Claim 9
Independent Claim
92 words
A method for manufacturing a high stability resin coated paper product comprising the steps of: a. dispersing an organic stabilizer additive in a suitable medium to form an additive dispersion; b. applying said additive dispersion to at least one surface of a paper sheet; c. coating said surface from step (b) with a suitable polyolefin resin to form a coated sheet; and d. subjecting said coated sheet to conditions which cause a stabilizing amount of said organic stabilizer additive to migrate from said sheet into the resin portion of said coated sheet.
Claim 10
Independent Claim
92 words
A method for manufacturing a high stability resin coated paper product comprising the steps of: a. dispersing an organic stabilizer additive in a suitable medium to form an additive dispersion; b. applying said additive dispersion to at least one surface of a paper sheet; c. coating said surface from step (b) with a suitable polyolefin resin to form a coated sheet; and d. subjecting said coated sheet to conditions which cause a stabilizing amount of said organic stabilizer additive to migrate from said sheet into the resin portion of said coated sheet.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-09 | 1978-06-10 | 1978-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-09 | 1982-06-10 | 1982-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-09 | 1986-06-10 | 1986-12-10 | $7700.00 | Window Closed / Lapsed |