Urea formaldehyde dispersions modified with higher aldehydes

Details Urea formaldehyde dispersions modified with higher aldehydes Urea formaldehyde dispersions modified with higher aldehydes

1981-06-03

1982-06-01

Pertilla, Theodore E.

Chemistry: fertilizers

Processes and products

Organic material-containing

71 6408, C05C 900

Patent

active

043326102

ABSTRACT:
A process for the preparation of neutralized, urea aldehyde polymeric dispersions by acid catalyzed reaction of urea and formaldehyde plus a higher aldehyde, having from two to four carbon atoms, wherein the mol ratio of formaldehyde to the higher aldehyde is at least 2:1 and the function of the higher aldehyde is to act as an inhibitor of further polymerization. The dispersions are further stabilized against settling by the addition of thickener-suspending agents. The products of the process are useful as sources of nitrogen which continue to fertilize plants, especially grasses for long periods of time after applied by means of conventional spraying equipment.

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Yee and Love, Proc. Soil Sci. Soc. Am. 11 (1946), pp. 389-391.
Clark et al., Ind. & Eng. Chemistry, 40 (1948), pp. 1178-1183.
Official Methods of Analysis of the Association of Official Agricultural Chemists, 11th Ed., 1970, pp. 18, 19.

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