B - Operations – Transporting – 05 – D
Patent
B - Operations, Transporting
05
D
117/102
B05D 7/02 (2006.01) C08J 9/40 (2006.01)
Patent
CA 1073759
ABSTRACT The method of treating open-celled polyurethane foam by the application of a modifying ingredient, such as a dye, pigment, color stablizer or fire retardant, for example, wherein the method comprises the steps of (a) applying an excess of a liquid solution or dispersion of the modifying ingredient to a mass of the foam, (b) removing most of the excess of the liquid by squeezing the mass, (c) passing a gas, the temperature of which is between 350°F. and 500°F., through the material for a period of time sufficient (1) to raise the temperature of the polyurethane mass to a point at which the polyurethane will absorb the modifying ingredient, and (2) to vaporize the liquid present in the solution or dispersion, the period of time being insufficient to cause charring of the polyurethane, thereby accelerating the absorption of the modifying ingredient into the polyurethane, so as to permanently incorporate the modifying ingredient into the foam, and (d) allowing the mass to cool. The gas is chosen so as to be inert with respect to the foam, the modifying ingredient, and the liquid.
279927
LandOfFree
Method of applying modifying ingredients to open-celled... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of applying modifying ingredients to open-celled..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of applying modifying ingredients to open-celled... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-24159