Low molecular weight urea-formaldehyde reaction products and pro

Details Low molecular weight urea-formaldehyde reaction products and pro Low molecular weight urea-formaldehyde reaction products and pro

1988-10-17

1991-08-27

Kight, III, John

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From aldehyde or derivative thereof as reactant

528260, 71 28, 71 30, G08G 1212, C05C 900

Patent

active

050434179

ABSTRACT:
Low molecular weight urea-formaldehyde reaction products are provided. Such products exhibit cold water solubility. They find use as a sustained nitrogen-release source for animals and plants. A three-stage process is provided for preparing the reaction products. The first stage comprises reacting urea and formaldehyde in an alkaline, alcoholic solution. Then the solvent is distilled off to form a melt. In the final stage the melt is polymerized to form the cold water soluble, low molecular weight reaction product.

REFERENCES:
patent: 2278375 (1942-03-01), Olin
patent: 2644806 (1953-07-01), Kise
patent: 3759687 (1973-09-01), Nobell
patent: 4596593 (1986-06-01), Tazawa et al.
patent: 4879410 (1989-11-01), Singh et al.
patent: 4956593 (1986-06-01), Tazawa et al.

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