US3839281A
Expired / Lapsed
US
⏱️ 0.0 years remaining
N-hydroxyalkylpiperidyl,n-hydroxyalkylpiperazyl compounds as accelerating agents in epoxy resin compositions
Assignee: Novartis Corp
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Filing: 1971-06-16
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Granted: 1974-10-01
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Expires: 1991-06-16
Abstract
Abstract This invention relates to 1,2-epoxy resin compositions containing N-hydroxyalkyl substituted piperidyl or piperazyl compounds as novel accelerating agents. The composition can be suitably used in the preparation of cured epoxy resins which are used as coatings, adhesives, electrical insulators and the like.
Inventors
- 👤 B Dreher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:12
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/62; C08G59/64; C08G59/68; C08G59/686; Y; Y10; Y10S; Y10S525/00; Y10S525/934
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
57 words
A HOMOGENEOUS PULVERULENT COATING COMPOSITION HAVING AN AVERAGE PARTICLE SIZE OF 20 TO 350 MICRONS, COMPRISING A SOLID 1,2 EPOXY RESIN HAVING MORE THAN ONE EPOXY GROUP, A HARDENER SELECTED FROM THE GROUP CONSISTING OF DICYANDIAMIDE, 2,6-XYLYLENE BIGUANIDE, METHYLTETRAHYDROPHTHALIC ANHYDRIDE AND TRIMELLITIC ANHYDRIDE; AND AN ACELERATOR SELECTED FROM THE GROUP CONSISTING OF A COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
57 words
A HOMOGENEOUS PULVERULENT COATING COMPOSITION HAVING AN AVERAGE PARTICLE SIZE OF 20 TO 350 MICRONS, COMPRISING A SOLID 1,2 EPOXY RESIN HAVING MORE THAN ONE EPOXY GROUP, A HARDENER SELECTED FROM THE GROUP CONSISTING OF DICYANDIAMIDE, 2,6-XYLYLENE BIGUANIDE, METHYLTETRAHYDROPHTHALIC ANHYDRIDE AND TRIMELLITIC ANHYDRIDE; AND AN ACELERATOR SELECTED FROM THE GROUP CONSISTING OF A COMPOUND OF THE FORMULA
Claim 3
Dependent Claim
33 words
A composition of claim 1 wherein the accelerator is selected from the group consisting of N-hydroxyethylpiperidine, N-hydroxypropylpiperidine, N-hydroxyisopropylpiperidine, 2-methyl-N-hydroxymethylpiperidine, 2-phenyl-N-hydroxymethylpiperidine, 2-hydroxy-N-hydroxymethylpiperidine, 2-chloro-N-hydroxymethylpiperidine, 2-p-chlorophenyl-N-hydroxymethylpiperidine, 2-hydroxymethyl-N-hydroxymethylpiperidine, 2-alkyl-N-hydroxymethylpiperidine, 1,3-di (N-beta hydroxyethyl)-4-piperidyl propane and 1-N-beta hydroxy-4-piperidyl-3-(4-piperidyl) propane.
Claim 4
Dependent Claim
17 words
The composition of claim 1 wherein the epoxy resin is prepared from a dihydric phenol and epihalohydrin.
References Cited (Backward Citations)
US3530093A
Cited
US3655617A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-30 | 1978-04-01 | 1978-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-30 | 1982-04-01 | 1982-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-30 | 1986-04-01 | 1986-10-01 | $7700.00 | Window Closed / Lapsed |