US3741272A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of spontaneously cross linking highly reactive power lacquer binders
Assignee: Bayer AG
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Filing: 1971-01-28
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Granted: 1973-06-26
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Expires: 1991-01-28
Abstract
Abstract Solvent-free spontaneously cross-linking highly reactive acrylic resins being crosslinkable through N-methylolether groups for powder coatings with a softening point of from 75* - 110* C are obtained from their solutions by continuous concentration through evaporation in a self-cleaning screw evaporator in which the residence times are from 2 to 6 minutes, the resin being heated both through external heating and through internal friction to a temperature not exceeding 120* C.
Inventors
- 👤 M Ullrich
- 👤 R Erdmenger
- 👤 H Kunze
- 👤 F Wingler
- 👤 K Nothen
- 👤 H Appel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:12
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/71; C08G18/711; B; B01; B01D; B01D1/00; B01J; B01J19/00; B01J19/18; B01J19/20; B29; B29C; B29C48/00; B29C48/25; B29C48/36; B29C48/50; B29C48/76; C08G18/28; C08G18/40; C08G18/62; C08G18/6216; C08G18/622; C08G18/6225; C08G18/6266; C08J; C08J3/00; B29C48/03; C08G2150/00; C08G2150/20; Y; Y02; Y02P; Y02P70/00; Y02P70/10; Y10; Y10S; Y10S159/00; Y10S159/10; Y10S524/00; Y10S524/904
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
17 words
The process of claim 1 wherein said resin is heated to a temperature of up to 110*C.
Claim 2
Dependent Claim
17 words
The process of claim 1 wherein said resin is heated to a temperature of up to 100*C.
Claim 3
Dependent Claim
15 words
The process of claim 1 wherein the pressure in said evaporator is below atmospheric pressure.
Claim 4
Dependent Claim
18 words
The process of claim 1 wherein said solvent has a boiling point of below 140*C. at normal pressure.
Claim 5
Dependent Claim
17 words
The process of claim 5 wherein said solvent is methylene chloride, methyl acetate, acetone or ethyl acetate.
Claim 6
Dependent Claim
21 words
The process of claim 1 wherein said solvent solution includes at least one pigment, filler, soluble dye, catalyst or levelling agent.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-25 | 1976-12-25 | 1977-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-25 | 1980-12-25 | 1981-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-25 | 1984-12-25 | 1985-06-26 | $7700.00 | Window Closed / Lapsed |