Urea formaldehyde dispersions modified with higher aldehydes

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

C - Chemistry, Metallurgy

08

L

71/23

C08L 61/24 (2006.01) C05C 9/02 (2006.01) C08G 12/12 (2006.01) C08J 3/03 (2006.01)

Patent

CA 1159666

ABSTRACT OF THE DISCLOSURE 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 use- ful 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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