US4024116A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hot-melt adhesive based on copolyamides from caprolactam and alkylene dicarboxylic acid salts of polyether diamine
Assignee: BASF SE
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Filing: 1975-09-08
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Granted: 1977-05-17
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Expires: 1995-09-08
Abstract
Abstract A hot-melt adhesive comprising copolyamides obtained from (a) ε-caprolactam, (b) diamine salts of adipic acid, sebacic acid and/or azelaic acid and (c) alkylenedicarboxylic acid salts of polyether-diamines gives e.g. textile laminates which are particularly resistant to washing and dry-cleaning.
Inventors
- 👤 Peter Horn
- 👤 Hans-Dietmar Haertl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:57
CPC Classifications
B; B32; B32B; B32B7/00; B32B7/04; B32B7/12; C; C08; C08G; C08G69/00; C08G69/40; B32B5/00; B32B5/22; B32B5/24; B32B5/26; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31725; Y10T428/31739
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
152 words
A hot-melt adhesive consisting essentially of a copolyamide of A. from 20 to 60 parts by weight of ε-caprolactam, B. from 10 to 40 parts by weight of a salt of adipic acid, sebacid acid, azelaic acid or mixtures thereof with a diamine of the general formula H.sub.2 N--(CH.sub.2).sub.n --NH.sub.2 (I) in which n is a whole number from 2 to 6, and C. from 20 to 60 parts by weight of a salt of a dicarboxylic acid of the general formula HOOC--(CH.sub.2).sub.n --COOH (II) in which n is a whole number from 7 to 11, with a diamine of the general formula ##STR3## in which n, m and y are identical or different and each is from 2 to 6 and the individual radicals R 1 , R 2 , R 3 and R 4 are identical or different and each is H or alkyl of 1 to 3 carbon atoms.
Claim 2
Dependent Claim
152 words
A hot-melt adhesive consisting essentially of a copolyamide of A. from 20 to 60 parts by weight of ε-caprolactam, B. from 10 to 40 parts by weight of a salt of adipic acid, sebacid acid, azelaic acid or mixtures thereof with a diamine of the general formula H.sub.2 N--(CH.sub.2).sub.n --NH.sub.2 (I) in which n is a whole number from 2 to 6, and C. from 20 to 60 parts by weight of a salt of a dicarboxylic acid of the general formula HOOC--(CH.sub.2).sub.n --COOH (II) in which n is a whole number from 7 to 11, with a diamine of the general formula ##STR3## in which n, m and y are identical or different and each is from 2 to 6 and the individual radicals R 1 , R 2 , R 3 and R 4 are identical or different and each is H or alkyl of 1 to 3 carbon atoms.
Claim 3
Dependent Claim
32 words
A hot-melt adhesive as set forth in claim 1, wherein the copolyamide has a Fikentscher K value of from 50 to 80, measured in 0.5% strength solution in m-cresol at 20° C.
Claim 4
Dependent Claim
56 words
A hot-melt adhesive as set forth in claim 1 consisting essentially of a copolyamide of A. from 35 to 45 parts by weight of ε-caprolactam, B. from 10 to 30 parts by weight of the hexamethylenediamine salt of adipic acid and C. from 35 to 45 parts by weight of the 4,9-dioxadodecane-1,12-diamine salt of decane-1,10-dicarboxylic acid.
References Cited (Backward Citations)
US3850887A
Cited
US3933762A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-05-16 | 1980-11-15 | 1981-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-16 | 1984-11-15 | 1985-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-16 | 1988-11-15 | 1989-05-17 | $7700.00 | Window Closed / Lapsed |