US3755069A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Highly stable resin coated paper products and method of making same
Assignee: Eastman Kodak Co
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Filing: 1970-12-14
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Granted: 1973-08-28
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Expires: 1990-12-14
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
- 👤 I Crawford
- 👤 R Democh
- 👤 R Baron
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:41
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: 5
Claim 1
Independent Claim
13 words
The resin coated paper product of claim 1, wherein said resin is polyethylene.
Claim 2
Dependent Claim
36 words
The resin coated paper product of claim 1 wherein said stabilizing additive is selected from the group of stabilizers consisting of phenols, mercaptans, sulfides, organo phosphorus compounds, benzophenone, salts of salicylic acid, benzatriazoles and metal organics.
Claim 3
Dependent Claim
95 words
The resin coated paper product of claim 3 wherein said stabilizing additive is selected from the group consisting of; 1, 3,5-tri-methyl-2,4,6 tris(3,5 di-t-butyl-4-hydroxytolyl) benzene, 2,2''thio bis-(4-methyl-6-t-butylphenol), 2,2''-methylene bis (4-methyl-6-t-butylphenol), 4,4''-thio bis(6-t-butyl meta cresol), octadecyl (3,5 di-t-butyl-4-hydroxy phenyl)acetate, 3,5-di-t-butyl-4-hydroxy phenyl orthophosphate, 2-Naphthyldisulfide, n-dodecyl sulfide, 2-Naphthalenethiol, tri(2-ethylhexyl phosphate, tetrakis (nonylphenyl) polypropylene glycol disphosphite, 2-benzoimidazolethiol, distearyl pentaerythiritol disphosphite, tri cetyl tri thio phosphite, (2,2''-thio bis(4-tertiary-octyl phenolato)-n-butylamine nickel (II), zinc (II) dibutyl thiocarbamate, and 2-hydroxy-4-n-octoxyl-benzophenone and is present at a concentration of from about 0.1 to about 10 percent by weight based upon the weight of the paper stock.
Claim 4
Dependent Claim
35 words
The resin coated paper product of claim 4 wherein said stabilizing additive is present at a concentration of from about 0.5 to about 2.0 percent by weight baseD upon the weight of said paper stock.
Claim 5
Independent Claim
103 words
A method for manufacturing a high stability resin coated paper product comprising the steps of: a. dispersing an organic stabilizer additive for a polyolefin resin in a suitable medium to form an additive dispersion; b. mixing said additive dispersion into the furnish in a paper making operation; c. forming said furnish into a suitable dried sheet; d. coating at least one surface of said sheet with a polyolefin resin to form a coated sheet; and e. subjecting said coated sheet to conditions which cause a stabilizing amount of said 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) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |