US4124549A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corrosion-inhibiting plastic films
Assignee: Aicello Chemical Co Ltd
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Filing: 1975-08-13
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Granted: 1978-11-07
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Expires: 1995-08-13
Abstract
Abstract An extruding and molding material suitable for the production of packaging materials for the protection of metal articles against corrosion is obtained by admixing a thermoplastic resin with an organic monoamine and an acid. The organic monoamine and the acid react to form a volatile corrosion inhibitor at the high temperature encountered in the extruding and molding process.
Inventors
- 👤 Keinichi Hashiudo
- 👤 Kanji Imanishi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:22
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/02; C08; C08K; C08K13/00; C08K13/02; C08K3/00; C08K3/18; C08K3/24; C08K3/28; C08K3/32; C08K5/00; C08K5/16; C08K5/17; C08K5/34
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
64 words
A method for producing a corrosion-protective packaging material comprising: admixing a thermoplastic resin, an acid, and an organic monoamine to form a uniform blend; and molding or extruding said blend at a temperature sufficient to cause said acid and said organic monoamine to react together to form a dispersion of a volatile corrosion inhibitor within said thermoplastic resin, thereby forming a corrosion-protective packaging material.
Claim 2
Independent Claim
64 words
A method for producing a corrosion-protective packaging material comprising: admixing a thermoplastic resin, an acid, and an organic monoamine to form a uniform blend; and molding or extruding said blend at a temperature sufficient to cause said acid and said organic monoamine to react together to form a dispersion of a volatile corrosion inhibitor within said thermoplastic resin, thereby forming a corrosion-protective packaging material.
Claim 3
Dependent Claim
19 words
The method of claim 1 wherein said extrusion or molding temperature is within the range of from 120°-300° C.
Claim 4
Dependent Claim
34 words
The method of claim 1, wherein said thermoplastic resin is a polyethylene, a polypropylene, a polybutene-1, an ethylene-vinyl acetate copolymer, a polyvinyl chloride, a polyamide, a polystyrene, a polycarbonate, a polyester or a polyurethane.
Claim 5
Dependent Claim
32 words
The method of claim 1, wherein said organic monoamine is amyl amine, octyl amine, monoethanol amine, isopropanol amine, dibutyl amine, diisopropyl amine, benzyl amine, naphthyl amine, morpholine, benzotriazole or an alkyl benzotriazole.
Claim 6
Dependent Claim
41 words
The method of claim 1, wherein said acid is an organic acid selected from the group consisting of caprylic acid, capric acid, lauric acid, stearic acid, succinic acid, maleic anhydride, phthalic anhydride, benzoic acid, naphthoic acid, citric acid or tartaric acid.
Claim 7
Dependent Claim
27 words
The method of claim 1, wherein said acid is an inorganic acid selected from the group consisting of nitrous acid, phosphoric acid, phosphorous acid and carbonic acid.
Claim 8
Dependent Claim
22 words
The method of claim 1 wherein the molar ratio of organic monoamine to acid is within the range of 1.1:1 to 2.0:1.
Claim 9
Dependent Claim
18 words
The method of claim 1 wherein said volatile corrosion inhibitor is 1-20% by weight of said packaging material.
References Cited (Backward Citations)
US2717843A
Cited
US2829945A
Cited
US3112159A
Cited
US3201363A
Cited
US3413227A
Cited
US3882075A
Cited
JPS4921223A
Cited
US3936560A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-11-06 | 1982-05-08 | 1982-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-11-06 | 1986-05-08 | 1986-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-11-06 | 1990-05-08 | 1990-11-07 | $7700.00 | Window Closed / Lapsed |