초록 ▼

Disclosed is a novel method for determining the degree of cure of polyester and epoxy resins which includes the steps of adding a catalyst, containing a pigment, to the resin; mixing the two components to provide a visually uniform distribution of the catalyst and pigment throughout the resin; and,

Disclosed is a novel method for determining the degree of cure of polyester and epoxy resins which includes the steps of adding a catalyst, containing a pigment, to the resin; mixing the two components to provide a visually uniform distribution of the catalyst and pigment throughout the resin; and, depositing the mixture in a desired position for curing. The pigment can also be added directly to the resin rather than the catalyst. Additionally, in either alternative, at the completion of the curing the color imparted by the pigment has substantially disappeared from the cured product as though no pigment had been employed. Also disclosed is a novel benzoyl peroxide paste composition, for curing polyester resins, having a pigment the color of which substantially disappears from the cured product.

대표청구항 ▼

A novel pigmented organic peroxide catalyst for the polymerization of polyester resins comprising: from about 48-50% by weight of benzoyl peroxide; a suitable plasticizer; and from about 0.03 to about 0.16 percent by weight of a pigment capable of imparting a uniform color to said catalyst and to a

A novel pigmented organic peroxide catalyst for the polymerization of polyester resins comprising: from about 48-50% by weight of benzoyl peroxide; a suitable plasticizer; and from about 0.03 to about 0.16 percent by weight of a pigment capable of imparting a uniform color to said catalyst and to a polyester resin with which said catalyst is mixed and of substantially losing said color when the catalyst-resin mixture has cured.