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US 6,284,720 B1Granted
Environmentally friendly ink cleaning preparation
AssigneeVertec BioSolvents, Inc.
InventorJames E. Opre
Life of this patent
Estimating the term…
Abstract
A solvent that is biodegradable, provides effective solvency for a broad range of tasks and is generally benign to human health is disclosed. This solvent is a mixture of a lactate ester and an edible oil ester that has a closed cup flash point at or above 59° C., and can include other non-halogenated solvents and surfactants.
Claims19
A cleaning composition comprising:
- (A) about 40 to about 70 weight percent of a C1-C4 ester of lactic acid;
- and
- (B) about 1 to about 30 weight percent C1-C4 ester of a C16-C20 fatty acid having a melting point of −10° C. or less.
A cleaning composition comprising:
- (A) about 40 to about 70 weight percent of a C1-C4 ester of lactic acid;
- (B) about 1 to about 30 weight percent C1-C4 ester of a C16-C20 fatty acid having a melting point of −10° C. or less;
- (C) about 10 to about 30 weight percent of an organic co-solvent;
- (D) about 10 to about 30 weight percent of a surfactant;
- (E) zero to about 5 weight percent of an acidulent;
- (F) zero to about 10 weight percent of an emulsifying agent;
- and
- (G) zero to about 5 weight percent of a fragrance.
5 more elements
A method of removing ink comprising the steps of:
- (a) providing an ink removal solution comprising:
- (i) about 40 to about 70 weight percent of a C1-C4 ester of lactic acid;
- and
- (ii) about 1 to about 30 weight percent C1-C4 ester of a C16-C20 fatty acid having a melting point of −10° C. or less;
- (b) contacting a surface that has ink on it with the ink removal solution for a period of time sufficient to permit at least some of the ink to become dissolved or dispersed in the ink removal solution to form a used ink removal solution and a cleaned surface;
- and
- (c) separating the used ink removal solution from the cleaned surface.
4 more elements
Dependencies are inferred from the claim text.