Method of forming a urethane prepolymer and its use in consolida

Details Method of forming a urethane prepolymer and its use in consolida Method of forming a urethane prepolymer and its use in consolida

1983-05-10

1985-01-22

Welsh, Maurice J.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

210728, 521100, 521101, 521102, 521159, 523123, 523129, 528 48, 528 76, 528 77, 528 80, C08G 1814

Patent

active

044953100

ABSTRACT:
A method of forming a urethane prepolymer comprising the steps of gradually adding an isocyanate compound to a hydrophilic polyether or polyester compound without substantial added mixing whereby a relatively dense isocyanate layer and a polyether or polyester layer overlying the isocyanate layer are formed, and a urethane prepolymer-forming reaction occurs at the interface between the layers. The resulting urethane prepolymer may be reacted with water to form a cellular urethane polymer, or with an aqueous slurry of unconsolidated aggregate material to form a consolidated aggregate product, such as a plant growth supporting rooting medium.

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Wall, Chem. Engr. Prog., 57, No. 10, 1961, pp. 48-51.

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