Compositions and methods for removing contaminants from plastics processing equipment
Assignee2569924 Ontario Inc.
InventorsJoseph Albert Turner, Bryon Wolff
Life of this patent
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Abstract
Compositions for removing contaminants from plastics processing equipment are described herein. The compositions may include a polymeric carrier component, an oxidizing agent, an abrasive and/or a gas agent. Methods of preparing the compositions described herein and methods of removing contaminants from plastics processing equipment are also described.
Claims20
A purging composition for removing contaminants from plastics processing equipment, the purging composition comprising:
- greater than about 50 weight percent of a polymeric carrier component based on the total weight percent of the purging composition;
- and
- greater than about 5 weight percent of an oxidizing agent based on the total weight percent of the purging composition, the oxidizing agent comprising a universal polymer, anhydrous sodium persulfate and anhydrous sodium tetraborate;
- wherein the purging composition is a feedstock material in the form of a plurality of pellets, granules, rods, powder or other particles.
A purging composition for removing contaminants from plastics processing equipment, the composition comprising:
- a) greater than 50 weight percent of a polymeric carrier component based on the total weight percent of the purging composition;
- b) greater than 15 weight percent of an abrasive based on the total weight percent of the purging composition, the abrasive comprising a universal polymer, an abrasive material and an antioxidant, the abrasive material comprising aluminum silicates;
- and
- c) greater than 3 weight percent of a gas agent based on the total weight percent of the purging composition;
- wherein the purging composition is a feedstock material in the form of a plurality of pellets, granules, rods, powder or other particles.
A purging composition for removing contaminants from plastics processing equipment, the composition comprising:
- a) greater than 1 weight percent of a polymeric carrier component based on the total weight percent of the purging composition;
- and
- b) greater than 1 weight percent of an abrasive based on the total weight percent of the purging composition, the abrasive comprising a universal polymer, an abrasive material and an antioxidant, the abrasive material comprising aluminum silicates;
- wherein the purging composition is a feedstock material in the form of a plurality of pellets, granules, rods, powder or other particles.
Dependencies are inferred from the claim text.