Cleaning composition
AssigneeUnichema Chemie B.V.
InventorsPieter Vonk, Anette Heymann
Life of this patent
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Abstract
A cleaning composition to remove unwanted paint, graffiti or other coatings from a substrate comprises 40-90 wt. % of a five-membered ring lactam, such as N-methyl-2-pyrrolidone, and 10-60 wt. % of a glycerol triester of a C1-C4 saturated aliphatic monocarboxylic acid. Additionally, up to 25 wt. % of the composition of diethylphthalate, diisopropyl adipate and/or a C1-C4 alkyl lactate may be present. Also a method of cleaning substrates and woven or non-woven tissue impregnated with the cleaning composition has been claimed.
Claims12
A cleaning composition to remove unwanted paint, graffiti or other coatings from a substrate which consists essentially of:
- (1) from 40% to 90% by weight of the total composition of a five-membered ring lactam of the general formula ##STR2## in which R represents a hydrogen atom, or a methyl, an ethyl, a propyl, an isopropyl or a vinyl group, and
- (2) from 10% to 60% by weight of the total composition of a glycerol triester of an aliphatic saturated monocarboxylic acid having from 1 to 4 carbon atoms;
- and
- (3) an effective amount of up to 25 wt. % of the total composition of a member of the group consisting of diethyl phthalate, diisopropyl adipate and esters of lactic acid and a saturated aliphatic monohydric alcohol having from 1 to 4 carbon atoms.
Dependencies are inferred from the claim text.