US3932340A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nylon coating composition
Assignee: Daicel Corp
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Filing: 1974-08-19
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Granted: 1976-01-13
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Expires: 1994-08-19
Abstract
Abstract A coating composition is disclosed for producing alcohol-insoluble films which comprises a mixture of an alcohol-soluble nylon copolymer, an alcohol-soluble alkoxymethylated nylon and an acid catalyst.
Inventors
- 👤 Minoru Kamosaki
- 👤 Sigel Asai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:33
CPC Classifications
C; C09; C09D; C09D177/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
175 words
A coating composition comprising a solution of (1) an alcohol-soluble nylon polymer selected from the group consisting of ε-caprolactam/hexamethylenediamine adipate copolymer, ε-caprolactam/laurolactam copolymer, ε-caprolactam/hexamethylenediamine adipate/laurolactam terpolymer and ε-caprolactam/hexamethylenediamine adipate/hexamethylenedodecanedioamide terpolymer, (2) from 5 to 90 weight percent of the total of (1) and (2), calculated as an N-alkoxymethylated nylon of a degree of alkoxymethylation of 30 molar percent, of an N-alkoxymethylated nylon selected from the group consisting of methoxymethylated ε-caprolactam polymer, methoxymethylated hexamethylenediamine adipate polymer, methoxymethylated ε-caprolactam/laurolactam copolymer and propoxymethylated ε-caprolactam polymer, and (3) from 0.5 to 8 weight percent, based on the weight of the N-alkoxymethylated nylon (2), of an acid catalyst selected from the group consisting of tartaric acid, maleic acid, crotonic acid, malonic acid, succinic acid, oxalic acid, adipic acid, citric acid, o-, m- and p- hydroxybenzoic acids, 2,4-dihydroxybenzoic acid, 2-hydroxy-4-methoxybenzoic acid, hypophosphorous acid, chromic acid anhydride and p-toluenesulfonic acid, dissolved in (4) a solvent selected from the group consisting of alkanols of 1 to 6 carbon atoms, chlorinated aliphatic hydrocarbons of 1 to 6 carbon atoms, aromatic hydrocarbons and mixtures thereof.
Claim 2
Dependent Claim
175 words
A coating composition comprising a solution of (1) an alcohol-soluble nylon polymer selected from the group consisting of ε-caprolactam/hexamethylenediamine adipate copolymer, ε-caprolactam/laurolactam copolymer, ε-caprolactam/hexamethylenediamine adipate/laurolactam terpolymer and ε-caprolactam/hexamethylenediamine adipate/hexamethylenedodecanedioamide terpolymer, (2) from 5 to 90 weight percent of the total of (1) and (2), calculated as an N-alkoxymethylated nylon of a degree of alkoxymethylation of 30 molar percent, of an N-alkoxymethylated nylon selected from the group consisting of methoxymethylated ε-caprolactam polymer, methoxymethylated hexamethylenediamine adipate polymer, methoxymethylated ε-caprolactam/laurolactam copolymer and propoxymethylated ε-caprolactam polymer, and (3) from 0.5 to 8 weight percent, based on the weight of the N-alkoxymethylated nylon (2), of an acid catalyst selected from the group consisting of tartaric acid, maleic acid, crotonic acid, malonic acid, succinic acid, oxalic acid, adipic acid, citric acid, o-, m- and p- hydroxybenzoic acids, 2,4-dihydroxybenzoic acid, 2-hydroxy-4-methoxybenzoic acid, hypophosphorous acid, chromic acid anhydride and p-toluenesulfonic acid, dissolved in (4) a solvent selected from the group consisting of alkanols of 1 to 6 carbon atoms, chlorinated aliphatic hydrocarbons of 1 to 6 carbon atoms, aromatic hydrocarbons and mixtures thereof.
Claim 3
Dependent Claim
13 words
The composition according to claim 1 wherein the acid catalyst is hypophosphorous acid.
Claim 4
Dependent Claim
30 words
The composition according to claim 2 wherein said nylon polymer is a terpolymer of ε-caprolactam/hexamethylenediamine adipate/laurolactam, in a weight ratio of 1/1/1, and said N-alkoxymethylated nylon is N-methoxymethylated ε-caprolactam polymer.
Claim 5
Dependent Claim
28 words
The composition according to claim 1 wherein the amount of said acid catalyst is from 2 to 5 weight percent, based on the weight of said N-alkoxymethylated nylon.
Claim 6
Dependent Claim
28 words
The composition according to claim 1 wherein the amount of said N-alkoxymethylated nylon is from 5 to 30 weight percent of of the total of (1) and (2).
References Cited (Backward Citations)
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Cited
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Cited
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US3839496A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-01-12 | 1979-07-14 | 1980-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-12 | 1983-07-14 | 1984-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-12 | 1987-07-14 | 1988-01-13 | $7700.00 | Window Closed / Lapsed |