Title: Method for preparing pigmented polyesters wherein the pigment glycol slurry is preheated

Abstract: There is disclosed an improvement in the pigmenting of polyesters derived from free dicarboxylic acids and glycols employing a slurry consisting of pigmenting agent and a glycol which improvement comprises heating said slurry to a temperature ranging from about 90.degree. C. to about 1.degree. to 2.degree. C. below the boiling point of the glycol constituent and adding the heated slurry to the polyester forming reactants when the temperature of said reactants ranges from about 210.degree. to 240.degree. C. and the pressure in the reaction vessel employed ranges from about 20 to 70 pounds per square inch gauge.

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Inventors: Champlin, Roger A. (Uniontown, OH, US)

Application Number: 547686
Filing Date: 1975-02-06
Publication_date: 1976-01-13
Assignee: The Goodyear Tire & Rubber Company (Akron, OH)
Primary Class(es): 523/333 524/878
Other Classes:
US Patent Ref:

2962466	Nov, 1960	Parnell	260/40.
3002942	Oct, 1961	Zoetbroad et al.	260/40.
3275590	Sep, 1966	Thomas	260/40.

Other Refs:
Primary Examiner: Czaja, Donald E.
Assistant Examiner: Person, S. M.
Attorney: Brunner; F. W., Ward; J. P.