Process for the preparation of solutions of urea-formaldehyde re

Details Process for the preparation of solutions of urea-formaldehyde re Process for the preparation of solutions of urea-formaldehyde re

1978-10-06

1980-04-15

Pertilla, Theodore E.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

428219, 428530, 525158, C08L 6124, B32B 2308, B32B 2710

Patent

active

041983327

ABSTRACT:
A method for the preparation of hardenable urea-formaldehyde resins for use in impregnating and coating carrier webs wherein urea and formaldehyde are first reacted in the presence of an aminosulfonic acid and ammonia, additional aminosulfonic acid is added and the mixture is further reacted to adjust the viscosity of the solution and then additional ammonia and urea are added to the reaction mixture and the mixture is further reacted to adjust the viscosity thereof, and wherein a polymer formed from the monomers of the formula ##STR1## in which R.sup.1 =H or CH.sub.3,

REFERENCES:
patent: 3350329 (1967-10-01), Scholl
patent: 4113701 (1978-09-01), Laqua et al.

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