Method of preparing homogeneous thermosetting powder paint compo

Details Method of preparing homogeneous thermosetting powder paint compo Method of preparing homogeneous thermosetting powder paint compo

1975-11-05

1977-08-16

Michl, Paul R.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 4229, 260 4254, C08J 314

Patent

active

040425606

ABSTRACT:
A method of preparing a homogeneous thermosetting powder paint composition which cures to form a coating exhibiting outstanding exterior durability, adhesion, impact strength and, in particular, color match. The method comprises: introducing a liquid paint composition including at least a cross-linkable copolymer and a uniformly dispersed pigment into an evaporating zone adapted to heat said liquid paint so as to evaporate the inert solvent contained therein, passing the liquid paint into a separating zone; causing said solvent vapor to be removed; removing the non-volatile components of said paint in a molten state; cooling said non-volatile components; granulating said non-volatile components to form particles; blending a cross-linking agent for said copolymer with said powder; mixing said blend at a temperature greater than the melting point of said powder and said cross-linking agent but below the point at which cross-linking occurs so to form a molten mass having cross-linking agent uniformly dispersed therein; cooling said molten mass to form a solid material; and pulverizing to form a powder paint.

REFERENCES:
patent: 3028251 (1962-04-01), Nagel
patent: 3485789 (1969-12-01), Guilbault
patent: 3586654 (1971-06-01), Lerman
patent: 3758635 (1973-09-01), Labana
patent: 3781379 (1973-12-01), Theodore
patent: 3787521 (1974-01-01), Labana
patent: 3873493 (1975-03-01), Labana
patent: 3940453 (1976-02-01), Labana

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