US3933762A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hot melt adhesives from lactam copolyamides
Assignee: Toray Industries Inc
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Filing: 1974-06-19
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Granted: 1976-01-20
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Expires: 1994-06-19
Abstract
Abstract Hot-melt adhesives for fibers consisting essentially of copolyamides obtained by polymerizing four monomer units, namely, ε-caprolactam, hexamethylenediammonium adipate, hexamethylenediammonium sebacate, and laurolactam in specific proportions.
Inventors
- 👤 Nagayoshi Naito
- 👤 Sadakatu Hashimoto
- 👤 Yoshiyuki Komuro
- 👤 Tutomu Suyama
- 👤 Yukio Yonekura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:22
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02; C08G69/36; C09; C09J; C09J177/00; Y; Y10; Y10S; Y10S524/00; Y10S524/904
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
84 words
Hot-melt adhesives for fibers consisting essentially of a copolyamide prepared by copolymerizing the following four monomer: A. more than 5 and less than 20% by weight on the basis of the total amount of monomers of laurolactam and B. resulting portion of comonomers consisting essentially of a. 30 to 75% by weight of ε-caprolactam b. 5 to 40% by weight of hexamethylenediammonium adipate c. 20 to 65% by weight of hexamethylenediammonium sebacate, wherein the total of (a), (b), and (c) is 100% by weight.
Claim 2
Dependent Claim
84 words
Hot-melt adhesives for fibers consisting essentially of a copolyamide prepared by copolymerizing the following four monomer: A. more than 5 and less than 20% by weight on the basis of the total amount of monomers of laurolactam and B. resulting portion of comonomers consisting essentially of a. 30 to 75% by weight of ε-caprolactam b. 5 to 40% by weight of hexamethylenediammonium adipate c. 20 to 65% by weight of hexamethylenediammonium sebacate, wherein the total of (a), (b), and (c) is 100% by weight.
Claim 3
Dependent Claim
87 words
Hot-melt adhesives of claim 1 wherein the copolyamides are in the form of a powder and wherein on the powder surface (a) 0.01 - 0.5 wt% based on the weight of the copolyamide of an inorganic substance having a particle diameter of 0.001μ - 50μ comprising a nucleating agent for said polyamides and (b) 0.05 - 0.3 wt%, based on the weight of the copolyamide, of at least one compound selected from the group consisting of higher aliphatic amides and metal salts of higher aliphatic carboxylic acids.
Claim 4
Dependent Claim
28 words
Hot-melt adhesives of claim 2 wherein said inorganic substances are selected from the group consisting of talc, mica, calcium carbonate, magnesium oxide, silica, magnesium hydroxide, and calcium sulphate.
Claim 5
Dependent Claim
18 words
Hot-melt adhesives of claim 2 wherein the higher aliphatic carbonamides are alkylene-bis-carbonamides having 8 - 20 carbon atoms.
Claim 6
Dependent Claim
32 words
Hot-melt adhesives for fibers of claim 2 wherein the metal salts of higher aliphatic carboxylic acids are the stearates of a metal belonging to group I or II of the Perodic Table.
References Cited (Backward Citations)
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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) | 1979-01-19 | 1979-07-21 | 1980-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-19 | 1983-07-21 | 1984-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-19 | 1987-07-21 | 1988-01-20 | $7700.00 | Window Closed / Lapsed |