Composition and process for making a green colored polyester
AssigneeThe Goodyear Tire & Rubber Company
InventorsFred L. Massey, Douglas D. Callander
Life of this patent
Estimating the term…
Abstract
Specific color imparting compounds, including pigments and catalysts are used to produce a polyester resin having a green color. The compounds are added during polymerization of the polymer and the resins produced can be utilized to make various containers or packages to hold liquids or solids.
Claims30
In a polyester article the improvement comprising:
- a small amount of various color-imparting compounds contained in the polyester for imparting a green color thereto,
- said compounds comprising an iron compound, a titanium catalyst, and a blue pigment, said iron compound being a preformed alpha-ferric oxide or an iron salt which is thermally decomposed during polymerization of said polyester to an alpha-ferric oxide,
- the proportion of said compounds being sufficient to effect a green color.
A polyester article according to claims, 2, 3, 4, 5, or 6, wherein said polyester article is in the form of a bottle, and wherein said color has a Hunter (a) coordinate value of from about minus 5 to about minus 30 and a (b) coordinate value of from about 1 to about 15.
A green colored polyester resin, comprising:
- color-imparting compounds dispersed in the polyester resin, said compounds being an iron compound, a titanium catalyst, and a blue pigment, said iron compound being a preformed alpha-ferric oxide or an iron salt which is thermally decomposed during polymerization of said resin to alpha-ferric oxide, the amount of said pigments being such so that a green color is imparted to said polyester resin.
A process for making a polyester resin having a green color, comprising the steps of:
- preparing a polyester resin,
- adding an iron compound to said polyester resin during preparation thereof,
- adding a titanium catalyst to said polyester resin during preparation thereof,
- adding a blue pigment to said polyester resin during preparation thereof, and
- imparting a green color to said resin by utilizing sufficient amounts of said iron compound, said titanium catalyst, and said blue pigment.
Dependencies are inferred from the claim text.