Hot melt adhesives comprising copolymeric polyamides
Abstract
Abstract A hot melt adhesive which comprises a copolyamide consisting essentialy of (1) ε-caprolactam, (2)(a) hexamethylenediamine and (b) at least one straight chain, saturated aliphatic dicarboxylic acid having 6 to 20 carbon atoms in a substantially equimolar ratio and (3)(a) at least one of 2,2,4-trimethylhexamethylenediamine and 2,4,4-trimethylhexamethylenediamine and (b) at least one straight chain, saturated aliphatic dicarboxylic acid having 6 to 20 carbon atoms in a substantially equimolar ratio, the proportion of [A] the constituent unit essentially consisting of the component (1), [B] the contituent unit essentially consisting of the components (2)(a) and (2)(b) and [C] the constituent unit essentially consisting of the components (3)(a) and (3)(b) therein being within a pentagon circumscribed by the lines connecting the points P (82/17/1), Q (52/47/1), R (0/65/35), S (0/50/50) and T (86/7/7) in the graph as shown in FIG. 1 of the accompanying drawing (the numerals in the parenthesis following P, Q, R, S and T indicating the molar percentages of the constituent units [A], [B] and [C], respectively).
Inventors
- 👤 Kaoru Furukawa
- 👤 Shinichiro Seki
- 👤 Takashi Akiyama
- 👤 Singo Ueda
- 👤 Hideo Ikeda
Bibliographic Details
Claims Analysis
Total Claims: 5References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-11-02 | 1980-05-03 | 1980-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-02 | 1984-05-03 | 1984-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-02 | 1988-05-03 | 1988-11-02 | $7700.00 | Window Closed / Lapsed |