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US 6,191,087 B1Granted
Environmentally friendly solvent
AssigneeVertec BioSolvents, Inc.
InventorsJames E. Opre, Eugene P. Bergemann, Mark Henneberry
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 having a closed cup flash point in excess of 60° C., and can include other non-halogenated solvents and surfactants.
Claims18
A paint stripping or cleaning and degreasing solvent composition comprising:
- (A) about 10 to about 60 weight percent of a C1-C4 ester of a C16-C20 fatty acid having a melting point of −10° C. or less;
- (B) about 20 to about 75 weight percent of a C1-C4 ester of lactic acid;
- (C) zero to about 20 weight percent of a surfactant;
- (D) zero to about 20 weight percent of a thickener;
- and
- (E) zero to about 50 weight percent organic solvent,
- said composition being a homogeneous liquid at zero degrees C and having a closed cup flash point in excess of 60° C.
4 more elements
A paint stripping of cleaning and degreasing solvent composition comprising:
- (A) about 30 to about 60 weight percent of a C1-C4 ester of a C16-C20 fatty acid having a melting point of −10° C. or less;
- and
- (B) about 30 to about 60 weight percent of a C1-C4 ester of lactic acid;
- said composition being a homogeneous liquid at zero degrees C and having a closed cup flash point in excess of 60° C.
1 more element
A paint stripping or cleaning and degreasing solvent composition comprising:
- (A) about 20 to about 40 weight percent of a C1-C4 ester of a C16-C20 fatty acid having a melting point of −10° C. or less;
- (B) about 20 to about 40 weight percent of a C1-C4 ester of lactic acid;
- (C) zero to about 20 weight percent of a surfactant;
- (D) zero to about 20 weight percent of a thickener;
- and
- (E) zero to about 50 weight percent organic solvent, said composition being a homogeneous liquid at zero degrees C and having a closed cup flash point in excess of 60° C.
3 more elements
Dependencies are inferred from the claim text.