US3900607A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polylaurolactam powders suitable for metal coating
Assignee: Huels AG
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Filing: 1974-01-14
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Granted: 1975-08-19
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Expires: 1994-01-14
Abstract
Abstract Plasticizing polylaurolactam in solution and then precipitating results in a powdery product of improved estensibility, and which is particularly amenable for the coating of metals by the fluidized bed process.
Inventors
- 👤 Karl-Adolf Muller
- 👤 Armin Gude
- 👤 Gerhard Menzel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:57
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/20; C08J3/205; C08J3/21; B; B05; B05D; B05D1/00; B05D1/18; B05D1/22; B05D1/24; B05D2202/00; B05D2202/10; B05D2202/20; B05D2202/25; B05D3/00; B05D3/02; B05D3/0218; B05D7/00; B05D7/14; B05D7/16; C08J2377/00; C08J2377/02
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
110 words
IN A PROCESS OF COATING A METAL SUBSTRATE WITH PLASTICIZED POLYLAUROLACTAM POWDER BY THE FLUIDIZED BED COATING PROCESS THE IMPROVEMENT COMPRISING EMPLOYING AS SAID POLYLAUROLACTAM POWDER A PRECIPITATE RECOVERED FROM A SOLUTION COMPRISING POLYLAUROLACTAM, A SOLVENT THEREFOR AND A PLASTICIZER THEREFOR PRESENT IN THE SOLUTION IN A CONCENTRATION OF 0.5-3 PERCENT BY WEIGHT BASED ON THE WEIGHT OF THE POLYLAUROLACTAM, SAID SOLVENT BEING PRESENT IN SUFFICIENT QUANTITIES TO DISSOLVE SAID POLYLAUROLACTAM AND SAID PLASTICIZER, AND BEING A MEMBER SELECTED FROM THE GROUP CONSISTING OF FORMIC ACID, DIMETHYLFORMAMIDE, 2-ETHYLHEXANOL, N-HEXANOL AND CYCLOHEXANONE, SAID PLASTICIZER BEING AT LEAST ONE MEMBER SELECTED FROM THE GROUP CONSISTING OF A) A PHENOL OF THE FORMULA:
Claim 2
Dependent Claim
110 words
IN A PROCESS OF COATING A METAL SUBSTRATE WITH PLASTICIZED POLYLAUROLACTAM POWDER BY THE FLUIDIZED BED COATING PROCESS THE IMPROVEMENT COMPRISING EMPLOYING AS SAID POLYLAUROLACTAM POWDER A PRECIPITATE RECOVERED FROM A SOLUTION COMPRISING POLYLAUROLACTAM, A SOLVENT THEREFOR AND A PLASTICIZER THEREFOR PRESENT IN THE SOLUTION IN A CONCENTRATION OF 0.5-3 PERCENT BY WEIGHT BASED ON THE WEIGHT OF THE POLYLAUROLACTAM, SAID SOLVENT BEING PRESENT IN SUFFICIENT QUANTITIES TO DISSOLVE SAID POLYLAUROLACTAM AND SAID PLASTICIZER, AND BEING A MEMBER SELECTED FROM THE GROUP CONSISTING OF FORMIC ACID, DIMETHYLFORMAMIDE, 2-ETHYLHEXANOL, N-HEXANOL AND CYCLOHEXANONE, SAID PLASTICIZER BEING AT LEAST ONE MEMBER SELECTED FROM THE GROUP CONSISTING OF A) A PHENOL OF THE FORMULA:
Claim 3
Dependent Claim
21 words
A process as defined by claim 1, said solution containing on a weight basis 50-90 parts solvent per 100 parts polylaurolactam.
Claim 4
Dependent Claim
50 words
A process as defined by claim 1, said precipitate beinG formed by the steps of: a. dissolving said polylaurolactam in said solvent at above ambient temperature; b. adding said plasticizer to resultant solution of solvent and polylaurolactam; and c. cooling resultant solution containing said plasticizer to precipitate said plasticized polylaurolactam.
Claim 5
Dependent Claim
26 words
A process as defined by claim 3, wherein the polylaurolactam is dissolved at 100*-180*C., and said cooling is conducted at a rate of 0.1*-10*C. per second.
Claim 6
Dependent Claim
14 words
A process as defined by claim 4, wherein the polylaurolactam is dissolved at 130*-160*C.
Claim 7
Dependent Claim
17 words
A process as defined by claim 1 wherein the fluidized bed coating process is conducted at 200*-400*C.
Claim 8
Dependent Claim
17 words
A process as defined by claim 2 wherein the fluidized bed coating process is conducted at 200*-400*C.
Claim 9
Dependent Claim
17 words
A process as defined by claim 3 wherein the fluidized bed coating process is conducted at 200*-400*C.
Claim 10
Dependent Claim
17 words
A process as defined by claim 4 wherein the fluidized bed coating process is conducted at 200*-400*C.
Claim 11
Dependent Claim
17 words
A process as defined by claim 5 wherein the fluidized bed coating process is conducted at 200*-400*C.
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) | 1978-08-18 | 1979-02-17 | 1979-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-18 | 1983-02-17 | 1983-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-18 | 1987-02-17 | 1987-08-19 | $7700.00 | Window Closed / Lapsed |