Method of manufacture of a water-permeable-hydrophobic membrane

Details Method of manufacture of a water-permeable-hydrophobic membrane Method of manufacture of a water-permeable-hydrophobic membrane

1981-09-10

1983-06-07

Lawrence, Evan K.

Coating processes

Foraminous product produced

4273898, 427392, 4273934, 604373, B05D 302, B05D 500

Patent

active

043871216

ABSTRACT:
A method of making a hydrophobic membrane comprising stabilizing a hydrophobic latex binder by admixture with a fugitive, heat decomposable, hydrophilic surfactant which upon heating yields a hydrophobic residue; applying the latex thus stabilized to a hydrophobic web or substrate of non-woven fibers and then heating the coated web to decompose the surfactant to provide a dry hydrophobic web containing the hydrophobic residue of the surfactant.

REFERENCES:
patent: 3882070 (1975-05-01), Ceska
patent: 4112153 (1978-09-01), Butterworth et al.

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