Claims
- 1. A continuous method for the one-shot preparation of a melamine-formaldehyde resin which comprises:
- charging crystalline melamine and solid formaldehyde, in the absence of solvent, into a single pass reactor at a temperature ranging from about 120.degree. C. to about 180.degree. C. for from about 30 seconds to about 5 minutes, recovering the resultant resin as a molten liquid, coating said molten resin onto a reinforcing substrate while at approximately the temperature of reaction and cooling the resultant coated substrate.
- 2. The method of claim 1 wherein said reinforcing substrate is paper.
- 3. A product comprising a reinforcing substrate coated with a melamine-formaldehyde resin produced by charging crystalline melamine and solid formaldehyde, in the absence of solvent, into a single pass reactor at a temperature ranging from about 120.degree. C. to about 180.degree. for from about 30 seconds to about 5 minutes and recovering the resultant resin as a molten liquid.
- 4. A product comprising a reinforcing substrate coated with a melamine-formaldehyde resin and produced by the process of claim 1.
- 5. The product of claim 3 wherein said substrate is paper.
- 6. The product of claim 4 wherein said substrate is paper.
Parent Case Info
This is a division of application Ser. No. 466,172, filed Feb. 14, 1983, U.S. Pat No. 4,458,062, granted July 3, 1984.
US Referenced Citations (4)
Number |
Name |
Date |
Kind |
3936547 |
Schnee et al. |
Feb 1976 |
|
4076896 |
Bunkowski |
Feb 1978 |
|
4244990 |
Mayerhoffer |
Jan 1981 |
|
4279959 |
Falgiatore et al. |
Jul 1981 |
|
Divisions (1)
|
Number |
Date |
Country |
Parent |
466172 |
Feb 1983 |
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