White-opalescent adhesives for the preparation of bonded filters

Liquid purification or separation – Casing divided by membrane into sections having inlet – Membrane secured with adhesive of specified composition

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Details

156106, 156305, 264DIG48, B01D 6300

Patent

active

059763710

ABSTRACT:
The present invention discloses two-part isocyanate-based adhesive compositions, free of inorganic pigments and fillers, which cure to form polyurethane-based adhesives having an opaque-white appearance greater than about L* 80 and a shore A hardness greater than about 50. Such materials are particularly useful for the preparation of bonded filter. The invention further describes a method for the preparation of bonded filters using these compositions and the bonded filters thereof. Additionally, these compositions can also be used as two part general household adhesives and/or caulkings wherein the two liquid parts are metered together just prior to application using a dispensing apparatus including, but not limited to, glue guns having two containers (e.g., tubes); one tube, for example, containing polyol and diol components and the second containing polyisocyanate.

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patent: 3901852 (1975-08-01), Shah
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patent: 4332927 (1982-06-01), Simone
patent: 4532316 (1985-07-01), Henn
patent: 4976857 (1990-12-01), Solomon
patent: 5024870 (1991-06-01), Jackson

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