US4026864A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of aminoplast and phenoplast moulding compositions using a fluidized bed drier
Assignee: Novartis Corp
•
Filing: 1974-11-05
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Granted: 1977-05-31
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Expires: 1994-11-05
Abstract
Abstract Aminoplast or phenoplast moulding compositions are manufactured by passing an aqueous solution of a urea-formaldehyde resin, of an optionally phenol-modified melamine-formaldehyde resin or of a phenol-formaldehyde resin into a fluidized bed drier, by spraying the resin onto fillers and drying it. The compositions are used for crockery, household articles and technical components for the electrical industry.
Inventors
- 👤 Hermann Diethelm
- 👤 Peter Ruf
- 👤 Willi Zummerli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:44
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/20; C08J3/205; C08J3/21; C08J3/212; C08J2361/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
64 words
A process for the manufacture of aminoplast or phenoplast moulding compositions, characterised in that an aqueous solution of a urea-formaldehyde resin, of a melamine-formaldehyde resin, or a phenol-modified melamine-formaldehyde resin or of a phenol-formaldehyde resin is passed, optionally after addition of pigments, into a fluidised bed drier, there sprayed onto fillers and dried at a temperature at which the resin does not fuse completely.
Claim 2
Dependent Claim
64 words
A process for the manufacture of aminoplast or phenoplast moulding compositions, characterised in that an aqueous solution of a urea-formaldehyde resin, of a melamine-formaldehyde resin, or a phenol-modified melamine-formaldehyde resin or of a phenol-formaldehyde resin is passed, optionally after addition of pigments, into a fluidised bed drier, there sprayed onto fillers and dried at a temperature at which the resin does not fuse completely.
Claim 3
Dependent Claim
22 words
A process according to claim 1, characterised in that the dried product is granulated and is used direct as a moulding composition.
Claim 4
Dependent Claim
16 words
A process according to claim 1, characterised in that the dried resin-filler mixture is densified warm.
Claim 5
Dependent Claim
18 words
A process according to claim 1, characterised in that the aqueous resin solution contains 50- 75% of resin.
Claim 6
Dependent Claim
43 words
A process according to claim 4, characterised in that the temperature in the fluidised bed is chosen to be between 50° C. and the melting point of the resin and the residence time of the resin in the drier is about 1 hour.
Claim 7
Dependent Claim
18 words
A process according to claim 1, characterised in that an aqueous solution of a melamine-formaldehyde resin is used.
Claim 8
Dependent Claim
19 words
A process according to claim 1, characterised in that an aqueous solution of a phenol-modified melamine-formaldehyde resin is used.
References Cited (Backward Citations)
US2101635A
Cited
US3036932A
Cited
US3376239A
Cited
US3856441A
Cited
US3775240A
Cited
US3880968A
Cited
US3793302A
Cited
US3786041A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-05-30 | 1980-11-29 | 1981-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-30 | 1984-11-29 | 1985-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-30 | 1988-11-29 | 1989-05-31 | $7700.00 | Window Closed / Lapsed |