Method of rejuvenating rubber printing blankets
AssigneeClayton Chemical Company
InventorsGary Fujii, Lowell W. Huff
Life of this patent
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Abstract
A method of rejuvenating and repairing a rubber printing blanket comprising the steps of contacting a rubber sweller solvent such as N-methyl-2-pyrrodidone with a thickening agent such as carboxypolymethylene to form a gelable mixture, and applying the resulting mixture to the rubber printing blanket.
Claims32
A method of rejuvenating and repairing a rubber printing blanket, the method comprising the steps of:
- mixing a rubber sweller solvent selected from the group consisting of glycol ethers, pyrrolidones and mixtures thereof with a thickening agent to thereby form a mixture;
- and
- applying the resulting mixture to the rubber printing blanket.
A method of rejuvenating and repairing a damaged rubber printing blanket, the method comprising the steps of:
- contacting N-methyl-2-pyrrolidone with carboxypolymethylene, wherein the carboxypolymethylene is present in an amount of 1.0% to 5.0% by weight of N-methyl-2-pyrrolidone;
- mixing the carboxypolymethylene with the N-methyl-2-pyrrolidone for a period of time and at a temperature sufficient to provide a resulting mixture having a gelable consistency;
- applying the mixture to the rubber printing blanket, and allowing the mixture to remain on the blanket for a period of time sufficient to restore the rubber blanket to a size, shape, resiliency and appearance substantially similar to the size, shape, resiliency and appearance of the rubber blanket prior to having been damaged.
A method of rejuvenating and repairing a damaged rubber printing blanket, the method comprising the steps of:
- mixing a thickening agent with a rubber sweller solvent selected from the group consisting of glycol ethers, pyrrolidones and mixtures thereof;
- the amount of the thickening agent being at least 0.75% by weight of the solvent;
- and
- applying the resulting mixture to the rubber printing blank, and allowing the mixture to remain on the blanket for a period of time sufficient to restore the rubber blanket to a size, shape, resiliency and appearance substantially similar to the size, shape, resiliency and appearance of the rubber blanket prior to having been damaged.
A method of rejuvenating and repairing a rubber printing blanket, the method comprising the steps of:
- preparing a mixture consisting essentially of a rubber sweller solvent selected from the group consisting of glycol ethers, pyrrolidones and mixtures thereof and a thickening agent;
- and
- applying said mixture to said rubber printing blanket.
A method of rejuvenating and repairing a rubber printing blanket, the method comprising the steps of:
- preparing a mixture of a rubber sweller solvent selected from the group consisting of glycol ethers, pyrrolidones and mixtures thereof and a thickening agent which is free of abradants;
- and
- applying said mixture to said rubber printing blanket.
Dependencies are inferred from the claim text.