Polyisobutylene as a liquid color concentrate component
View Patent ↗Use of polyisobutylene in a weight average molecular weight of greater than 1000 daltons can increase processing efficiency when making liquid color concentrates and can improve coloration of polymers used in a variety of final shaped polymer articles.
1. A liquid color concentrate, comprising:
(a) colorant;
(b) a low viscosity liquid diluent, wherein the low viscosity liquid diluent is red canola oil having a Brookfield viscosity (sp #6; 20 rpm; 20° C.) of about 150 cps; and
(c) polymeric colorant dispersing agent, wherein the polymeric colorant dispersing agent is polyisobutylene having a weight average molecular weight (Mw) of greater than 1000 daltons;
wherein the diluent and the dispersing agent are present in the concentrate in a weight ratio of about 1:1.
2. The liquid color concentrate according to claim 1 , wherein the colorant comprises a pigment.
3. The liquid color concentrate according to claim 1 , wherein the Mw of the polymeric colorant dispersing agent ranges from about 1200 to about 6000 daltons.
4. A colored polymer compound, comprising:
(a) a polymeric resin; and
(b) the liquid color concentrate of claim 1 .
5. The colored polymer compound of claim 4 , wherein the polymeric resin is a polyolefin.