초록 ▼

A solid marking composition that is erasable from both porous and non-porous marking susbtrates. The solid erasable marking composition comprises (a) an emulsion, the emulsion comprising a discontinuous polymeric phase and a continuous aqueous phase, the emulsion being characterized by its ability t

A solid marking composition that is erasable from both porous and non-porous marking susbtrates. The solid erasable marking composition comprises (a) an emulsion, the emulsion comprising a discontinuous polymeric phase and a continuous aqueous phase, the emulsion being characterized by its ability to be transformed, upon being contacted with the surface of a porous or non-porous marking substrate, from a first state in which the emulsion is stable to a second state in which the emulsion is unstable and the discontinuous polymeric phase rapidly agglomerates to form a deposit on the surface of the marking substrate with low adhesion thereto; (b) a colorant, the colorant being characterized by its association with the deposit when the emulsion is transformed into the second state; and (c) a shape-giving gel-forming agent, the shape-giving gel-forming agent being a salt of an aliphatic carboxylic acid having from 8 to 36 carbon atoms.

대표청구항 ▼

A marking composition that is erasable from both porous and non-porous marking substrates, said marking composition comprising: (a) an emulsion, said emulsion comprising a discontinuous polymeric phase and a continuous aqueous phase, said emulsion being characterized in that, prior to being contacte

A marking composition that is erasable from both porous and non-porous marking substrates, said marking composition comprising: (a) an emulsion, said emulsion comprising a discontinuous polymeric phase and a continuous aqueous phase, said emulsion being characterized in that, prior to being contacted with the surface of a porous or non-porous marking substrate, said emulsion exists in a stable first state whereas, upon being contacted with the surface of a porous or non-porous marking substrate, said emulsion is transformed into an unstable second state and said discontinuous polymeric phase rapidly agglomerates to form a deposit on the surface of the porous or non-porous marking substrate contacted therewith with low adhesion thereto, said polymeric phase constituting 25-50%, by weight, of the total composition; (b) a colorant, said colorant being characterized by its association with said deposit when said emulsion is transformed into said second state, said colorant constituting 1-2%, by weight, of the total composition; (c) a shape-giving gel-forming agent, said shape-giving gel-forming agent being a salt of an aliphatic carboxylic acid having from 8 to 36 carbon atoms, said shape-giving gel-forming agent constituting 10-15%, by weight, of the total composition; (d) a tackifier, said tackifier constituting 0-40%, by weight, of the total composition; (e) a humectant, said humectant constituting 0-6%, by weight, of the total composition; (f) an antioxidant and/or combination antioxidant and antiozinant, said antioxidant and/or combination antioxidant and antiozinant constituting 0-6%, by weight, of the total composition; and (g) a fluorochemical surfactant, said fluorochemical surfactant constituting 0-1.5%, by weight, of the total composition.