Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From lignin – tannin – or derivative reactant
Patent
1981-09-17
1983-06-07
Nielsen, Earl A.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From lignin, tannin, or derivative reactant
C08H 502
Patent
active
043872050
ABSTRACT:
The present invention relates to a method for improving a soil structure by stabilization of aggregates. According to the invention it is applied to the soil a graft polymer substantially free of monomer, having an intrinsic viscosity below 1dg/l and a molecular weight below 100,000. The graft polymer is obtained by the exothermic reaction of a water soluble lignosulfonate with a member selected from the group consisting of acrylic acid, methacrylic acid and mixtures thereof. The graft polymers have been found to be also useful as binding reagents for agglomerating single particles of particulate materials.
The graft polymers according to the invention are obtained in the form of an aqueous solution, which may be transformed into a powder by spray drying. As soil conditioners they may be applied by spraying, alone or admixed with fertilizers or pesticides and also combined with the operation of planting and soil stabilization.
REFERENCES:
patent: 3985659 (1976-10-01), Felicetta et al.
patent: 4276077 (1981-06-01), Zaslavsky et al.
patent: 4303438 (1981-12-01), Zaslavsky et al.
Vol'fkovich et al., "Improving Soil Structure", Chemical Abstracts 84, 73052n (1976).
Rozenberg Leib V.
Zaslavsky Dan
Nielsen Earl A.
Roberts, Jr. John S.
Technion Research & Development Foundation Ltd.
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