Method for extending pigments

C - Chemistry – Metallurgy – 09 – C

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C09C 3/06 (2006.01) C09D 7/12 (2006.01)

Patent

CA 2232824

Unusually high loading levels of smectite minerals are found to provide excellent pigment spacing in aqueous-based coatings, as will enable desired improved hiding, thereby extending the pigment. The level of smectite used in accordance with the invention is sufficiently high that the high gelling efficiency smectites previously used as thixotropes would be inappropriate, and would yield viscosities so high as to render the aqueous coating composition lacking in desired flowability properties. Thus in accordance with the present invention, there is mixed with the aqueous carrier and pigment at least 0.5 % by weight of the total composition, of a particulate water swellable smectite which has a gelling efficiency such as to display a 20 rpm Brookfield viscosity of less than 900 cps when subjected to the standard gelling test herein, with the amount of the smectite in the composition not exceeding that which would raise the viscosity of the composition above 110 Krebs Units (KU).

On constate que des niveaux inhabituellement élevés de charge en minéraux, les smectites, donnent un excellent espacement des pigments dans des revêtement aqueux, ce qui permet d'améliorer leur pouvoir couvrant et donc d'allonger ces pigments. Le niveau des smectites retenu est assez élevé pour que les smectites à haute efficacité soient inappropriées, car elles donneraient des viscosités si élevées qu'une composition de revêtement aqueux présenterait des caractéristiques d'écoulement insuffisantes. On décrit donc un mélange d'un milieu aqueux et d'un pigment avec au moins 0,5 % du poids de la composition totale d'une smectite particulaire gonflable à l'eau, à efficacité de gélification telle qu'elle présente une viscosité Brookfield à 20 t/m de moins de 900 cps lorsqu'on la soumet au test de gélification normalisé indiqué dans la description, la quantité de smectites de cette composition n'excédant pas celle qui en élèverait la viscosité au-dessus de 110 unités Krebs.

LandOfFree

Say what you really think

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

Rating

Method for extending pigments 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 for extending pigments, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for extending pigments will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFCA-PAI-O-1666362

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