Patent EP0161491A1 successfully refreshed from Google Patents.
US4359556A
Expired / Lapsed
US
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Thermoplastic polyamide hot melt adhesive composition
Assignee: Chevron USA Inc
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Filing: 1981-06-05
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Granted: 1982-11-16
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Expires: 2001-06-05
Abstract
Abstract Hot melt adhesive compositions are provided which contain 40-98 weight % of a thermoplastic polyamide resin derived from a dimer acid and a low molecular weight aliphatic diamine, and 2-60 weight % of an alkenyl succinic anhydride.
Inventors
- 👤 Pallavoor R. Lakshmanan
- 👤 Benedict J. Monachino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:10
CPC Classifications
C; C09; C09J; C09J177/00; C09J177/06; C09J177/08
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
89 words
A hot melt adhesive composition consisting essentially of: (a) 40-98 weight percent of a thermoplastic polyamide resin derived from dimer acid and a low molecular weight aliphatic diamine, and (b) 2-60 weight percent of an alkenyl succinic anhydride; said alkenyl succinic anhydride having the structure: ##STR2## where R is an alkyl group containing about 15-49 carbon atoms; said polyamide resin having a molecular weight in the range of about 2,000 to 20,000 and a Ring and Ball softening point in the range of about 85° C. to 200° C.
Claim 2
Dependent Claim
89 words
A hot melt adhesive composition consisting essentially of: (a) 40-98 weight percent of a thermoplastic polyamide resin derived from dimer acid and a low molecular weight aliphatic diamine, and (b) 2-60 weight percent of an alkenyl succinic anhydride; said alkenyl succinic anhydride having the structure: ##STR2## where R is an alkyl group containing about 15-49 carbon atoms; said polyamide resin having a molecular weight in the range of about 2,000 to 20,000 and a Ring and Ball softening point in the range of about 85° C. to 200° C.
Claim 3
Dependent Claim
29 words
A composition of claim 1 containing from 50 to 95 weight percent of a thermoplastic polyamide resin and from 5 to 50 weight percent of an alkenyl succinic anhydride.
Claim 4
Dependent Claim
23 words
A composition of claim 1 containing about 50-87.5 weight percent of a thermoplastic polyamide and about 12.5-50 weight percent of alkenyl succinic anhydride.
Claim 5
Dependent Claim
23 words
A composition of claim 1 containing about 50-75 weight percent of a thermoplastic polyamide and 25-50 weight percent of an alkenyl succinic anhydride.
Claim 6
Dependent Claim
24 words
A composition of claim 1 containing about 50 weight percent of a thermoplastic polyamide and about 50 weight percent of an alkenyl succinic anhydride.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-11-15 | 1986-05-17 | 1986-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-11-15 | 1990-05-17 | 1990-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-11-15 | 1994-05-17 | 1994-11-16 | $7700.00 | Window Closed / Lapsed |