Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...
Patent
1981-05-08
1982-05-11
Welsh, Maurice J.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Cellular products or processes of preparing a cellular...
521100, 521101, 521102, 521905, 528 48, 528903, 528904, C08G 1814
Patent
active
043294367
ABSTRACT:
A method of forming a hydrophilic urethane prepolymer useful in consolidating aggregate material comprises the steps of adding an isocyanate compound to a hydrophilic polyether or polyester compound which has been heated to such a temperature that the temperature of the reactants after addition of isocyanate is at least as high as about 120.degree. C. The resulting urethane prepolymer may be reacted with an aqueous slurry of unconsolidated aggregate material, such as peat, to form a consolidated aggregate product, such as a plant growth-supporting rooting medium.
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Wall, Chem. Engr. Progress 57, No. 10, pp. 48-51, 1961.
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