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US 4,365,031 AGranted
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.
Claims35
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 color-imparting compounds comprising a niobium catalyst compound, and a blue pigment,
- the amount of said niobium catalyst compound utilized is such that the amount of elemental niobium in said niobium catalyst compound ranges from about 5 to about 150 parts by weight based upon one million parts by weight of said polyester, and the amount of said blue pigment ranges from about 20 parts to about 100 parts by weight based upon one million parts by weight of said polyester,
- said amount of said compounds imparting a green color to said article.
1 more element
A green colored polyester resin, comprising:
- color-imparting compounds dispersed in the polyester resin, said compounds being a niobium compound and a blue pigment, the amount of elemental niobium in said niobium compound ranges from about 5 to about 150 parts by weight per million parts by weight of said polyester resin, and the amount of said blue pigment ranges from about 20 parts to about 100 parts by weight based upon one million parts by weight of said polyester resin, said amount of said compounds imparting a green color to said polyester resin.
A process for making a polyester resin having a green color, comprising the steps of:
- preparing a polyester resin,
- adding a niobium compound 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 niobium compound, and said blue pigment.
1 more element
Dependencies are inferred from the claim text.