Melamine formaldehyde microencapsulation in aqueous...

B - Operations – Transporting – 01 – J

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

B01J 13/18 (2006.01) B41M 5/165 (2006.01)

Patent

CA 2050544

A process for making melamine-formaldehyde microcapsules in an aqueous solution containing a high concentration of a water miscible or water soluble organic solvent is provided. The aqueous solution is prepared and a water insoluble melamine-formaldehyde pre-condensate is dissolved therein by adjusting the temperature and organic solvent concentration of the aqueous solution such that the melamine-formaldehyde pre-condensate is barely soluble therein. A substance to be encapsulated, preferably an oily solution containing a dyestuff precursor, is dispersed into the aqueous solution to form an emulsion, the melamine-formaldehyde pre-condensate being insoluble in the substance to be encapsulated. The melamine-formaldehyde pre-condensate is separated from the aqueous solution onto droplets of the substance to be encapsulated and the self-condensation reaction of the phase-separated melamine-formaldehyde pre-condensate initiated to form capsule walls around the droplets, thereby producing melamine-formaldehyde microcapsules in the aqueous solution containing a high concentration of a water miscible or water soluble organic solvent.

LandOfFree

Say what you really think

Search LandOfFree.com for Canadian inventors and patents. Rate them and share your experience with other people.

Rating

Melamine formaldehyde microencapsulation in aqueous... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Melamine formaldehyde microencapsulation in aqueous..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Melamine formaldehyde microencapsulation in aqueous... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFCA-PAI-O-1859285

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.