US4369036A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of modifying synthetic or natural polyamide products
Assignee: Toray Industries Inc
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Filing: 1980-12-04
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Granted: 1983-01-18
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Expires: 2000-12-04
Abstract
Abstract The present invention discloses a method of modifying a synthetic or natural polyamide product. A graft polymerization is carried out on the polyamide product in a solution containing 5 to 60 mole % of acrylic acid and 95 to 40 mole % of methacrylic acid as the monomer by means of a redox catalyst.
Inventors
- 👤 Koichi Saito
- 👤 Tatsuku Kojima
- 👤 Yoshikazu Kosaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:28
CPC Classifications
D; D06; D06M; D06M14/00; D06M14/08; D06M14/12; D06M14/16
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
71 words
A method of modifying a synthetic polyamide product wherein a synthetic polyamide product is modified by means of graft polymerization is carried out on said product using a redox catalyst in an aqueous solution containing 5 to 60 mole% of acrylic acid and 95 to 40 mole % of methacrylic acid as the monomer and thereafter a carboxylic acid group in the product is converted into metal or ammonium salt thereof.
Claim 2
Independent Claim
71 words
A method of modifying a synthetic polyamide product wherein a synthetic polyamide product is modified by means of graft polymerization is carried out on said product using a redox catalyst in an aqueous solution containing 5 to 60 mole% of acrylic acid and 95 to 40 mole % of methacrylic acid as the monomer and thereafter a carboxylic acid group in the product is converted into metal or ammonium salt thereof.
Claim 3
Dependent Claim
32 words
The method as defined in claim 1 wherein said aqueous solution contains 10 to 45 mole % of acrylic acid and 90 to 55 mole % of methacrylic acid as the monomer.
Claim 4
Dependent Claim
32 words
The method as defined in claim 1 wherein said aqueous solution contains 20 to 35 mole % of acrylic acid and 80 to 65 mole % of methacrylic acid as the monomer.
Claim 5
Dependent Claim
19 words
The method as defined in claim 1 wherein said polyamide product is a staple, a tow or a top.
Claim 6
Dependent Claim
15 words
The method as defined in claim 1 wherein said polyamide product is a spun yarn.
Claim 7
Dependent Claim
14 words
The method as defined in claim 1 wherein said polyamide product is a filament.
Claim 8
Dependent Claim
14 words
The method as defined in claim 1 wherein said polyamide product is a cloth.
Claim 9
Independent Claim
19 words
The method as defined in any of claims 7 through 8 wherein said synthetic polyamide product is nylon 6.
Claim 10
Independent Claim
19 words
The method as defined in any of claims 7 through 8 wherein said synthetic polyamide product is nylon 6·6.
Claim 11
Independent Claim
18 words
The method defined in any of claims 7 through 8 wherein said polyamide product is a fiber product.
Claim 12
Dependent Claim
14 words
The method as defined in claim 1 wherein said polyamide product is a film.
Claim 13
Dependent Claim
15 words
The method as defined in claim 1 wherein said polyamide product is a leather-like cloth.
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US4065256A
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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) | 1986-01-17 | 1986-07-19 | 1987-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-01-17 | 1990-07-19 | 1991-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-01-17 | 1994-07-19 | 1995-01-18 | $7700.00 | Window Closed / Lapsed |