Erasable Inks
OwnerJie Liinventor
Life of this patent
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Abstract
Erasable ink compositions are provided, including water, a coloring agent, a releasing agent including an alkoxylated siloxane, and a film-forming binder. In another aspect, erasable ink compositions are provided including a releasing agent having a water solubility ranging from about 0.5 to about 60%. The erasable inks are suitable for use on marker boards, e.g., white boards.
Claims32
An erasable ink composition comprising:
- (a) water;
- (b) a coloring agent;
- (c) a releasing agent comprising an alkoxylated siloxane;
- and
- (d) a film-forming polymeric binder.
An erasable ink composition comprising:
- (a) water;
- (b) a coloring agent;
- (c) a releasing agent having a water solubility ranging from about 0.5 to about 60%;
- and
- (d) a film-forming polymeric binder.
An erasable ink composition comprising:
- (a) 40-90% by weight water;
- (b) 0.2 to 30% by weight of a coloring agent;
- (c) 0.3-30% by weight of a releasing agent comprising a siloxane resin having a water solubility ranging from about 0.5 to about 60%;
- and
- (d) 1-15% by weight of a film-forming polymeric binder comprising a polyvinyl butyral resin.
A method of writing on a marking board comprising
- providing an ink comprising
- (a) water;
- (b) a coloring agent;
- (c) a releasing agent comprising an alkoxylated siloxane;
- and
- (d) a film-forming polymeric binder;
- and
- making a mark with said ink on a marking board having a smooth, substantially non-porous surface.
A pen for marking boards comprising an outer body, a writing tip at one end of said body, a reservoir included within said body and connected to said writing tip, and within said reservoir an aqueous erasable ink comprising
- (a) water;
- (b) a coloring agent;
- (c) a releasing agent having a water solubility ranging from about 0.5 to about 60%;
- and
- (d) a film-forming polymeric binder;
- said ink having the ability to form markings on a smooth, substantially non-porous surface, said markings being erasable from said surface by a dry eraser.
Dependencies are inferred from the claim text.