Method of making controlled released devices

Details Method of making controlled released devices Method of making controlled released devices

1996-08-19

1999-01-05

Clardy, S. Mark

Plant protecting and regulating compositions

Plant growth regulating compositions

424409, 424DIG11, 514953, 514964, A01N 2510

Patent

active

058562710

ABSTRACT:
The invention is a method of making a controlled release device that is free of defects. According to one aspect of the present invention, a method has the steps of first combining an active chemical with a dried carrier into a bound friable mixture followed by combining the bound friable mixture with a polymer preform prior to forming a device. According to another aspect of the present invention, a method has the steps of heating and mixing a casting urethane with an active chemical into a first solution, heating and mixing a trialkanolamine with a soft segment cross-linker into a second solution, and mixing the two solutions. A further aspect of the present invention is a composition of a casting urethane.

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