Organic pigment and a method for its preparation

C - Chemistry – Metallurgy – 09 – B

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C09B 67/20 (2006.01) C09B 61/00 (2006.01)

Patent

CA 2389687

The invention relates to a method for preparing an organic pigment from starch, and the pigment thus received. According to the invention, starch granules are swollen to increase their volume and plasticity, their stability towards changes in volume and shape is improved by cross-linking, by derivatization, or by making the surface hydrophobic, after which gas bubbles or cavities are formed inside the granules, these bubbles or cavities having a strong light scattering effect. Generating bubbles or cavities can be performed by evaporating water or another liquid, by releasing impregnated gas, by a gas generating reaction, or by displacing absorbed water with a solvent. The product is useful as a white pigment especially in coating of starch, in paints and in cosmetic products.

L'invention concerne un procédé de préparation d'un pigment organique à partir d'amidon, ainsi que le pigment ainsi obtenu. Le procédé de cette invention consiste à gonfler des grains d'amidon, d'où une augmentation de leur volume et de leur plasticité. La stabilité de ces grains vis-à-vis des changements de volume et de forme est améliorée par réticulation, par dérivatisation ou par hydrophobisation de surface. Des bulles de gaz ou des cavités sont ensuite formées à l'intérieur de ces grains, lesdites bulles ou cavités produisant une importante diffusion de lumière. Ces bulles ou cavités peut être formées par évaporation d'eau ou d'un autre liquide, par libération de gaz imprégné, par une réaction génératrice de gaz ou par déplacement d'eau absorbée au moyen d'un solvant. Ce produit peut être utilisé comme pigment blanc, notamment dans un revêtement d'amidon, dans des peintures et dans des produits cosmétiques.

LandOfFree

Say what you really think

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

Rating

Organic pigment and a method for its preparation does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Organic pigment and a method for its preparation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Organic pigment and a method for its preparation will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFCA-PAI-O-1899085

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