Method for forming a gellified polyurethane layer on a surface

Coating processes – Falling curtain of coating material utilized

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427421, 427426, 26433119, 239399, 239489, 239493, 239DIG7, B05D 130

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active

050716832

ABSTRACT:
Method and device for forming a gellified polyrethane layer on a surface, notably of a mould, by spraying a liquid reaction mixture comprising polyol and isocyanates and which has a viscosity between 20 and 2000 centipoises. The mixture is sprayed in the form of a film of liquid and/or raindrops of which the main part has a mean diameter (Medium Volume Diameter; "M.V.D.") which, according to the standards ASTM E 779-81, is larger than 100 microns and preferably larger than 500 microns.

REFERENCES:
patent: 3462083 (1969-08-01), Kautz
patent: 4234445 (1980-11-01), Hagen
patent: 4337281 (1982-06-01), Boone
patent: 4543366 (1985-09-01), Smith
patent: 4603813 (1986-08-01), Luegering
patent: 4809909 (1989-03-01), Kukesh
ASTM; "Standard Practice for Determining Data Criteria and Processing for Liquid Drop Size Analysis"; E799-81; pp. 710-715; 1982.

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