EP0344379A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Water-colour fluorescent ink for writing instrument
Assignee: NIPPON KEIKO KAGAKU COMPANY Ltd
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Filing: 1988-09-23
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Granted: —
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Expires: 2008-09-23
Abstract
Abstract A water-colour fluorescent ink for writing instruments comprises: 30 to 70% by weight of a dyed material obtained by providing a monomeric mixture consisting of 10 to 80%, preferably 30 to 55%, by weight of acrylonitrile, 0.5 to 20% by weight of (metha)acrylic acid, and the balance of styrene, emulsifying and polymerising the monomeric mixture to provide emulsified polymers of a particle diameter less than 0.5µm, and dyeing the emulsified polymers with a fluorescent dye; and 5 to 35% by weight of a hydrophilic organic solvent.
Inventors
- 👤 Tsuneaki Goto
- 👤 Muneaki Komoto
- 👤 Hiromitsu Ide
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-25 16:27
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/16; C09D11/17; B; B43; B43K; B43K8/00; B43K8/02; B43K8/022; C09D11/50
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
88 words
A water-colour fluorescent ink for writing instruments, characterised in that it comprises: (a) 30 to 70% by weight of a dyed material obtained by providing a monomeric mixture consisting of 10 to 80% by weight of acrylonitrile, 0.5 to 20% by weight of (metha)acrylic acid, and the balance of styrene, emulsifying and polymerising said monomeric mixture to provide emulsified polymers of a particle diameter less than 0.5µ, and dyeing said emulsified polymers with a fluorescent dye; and (b) 5 to 35% by weight of a hydrophilic organic solvent.
Claim 2
Dependent Claim
88 words
A water-colour fluorescent ink for writing instruments, characterised in that it comprises: (a) 30 to 70% by weight of a dyed material obtained by providing a monomeric mixture consisting of 10 to 80% by weight of acrylonitrile, 0.5 to 20% by weight of (metha)acrylic acid, and the balance of styrene, emulsifying and polymerising said monomeric mixture to provide emulsified polymers of a particle diameter less than 0.5µ, and dyeing said emulsified polymers with a fluorescent dye; and (b) 5 to 35% by weight of a hydrophilic organic solvent.
Claim 3
Dependent Claim
23 words
A water-colour fluorescent ink as claimed in claim 1, characterised in that said monomeric mixture includes 30 to 55% by weight of acrylonitrile.
Claim 4
Dependent Claim
39 words
A water-colour fluorescent ink as claimed in either claim 1 or claim 2, characterised in that said hydrophilic organic solvent comprises ethylene glycol, diethylene glycol, propylene glycol, dipropylene glycol, glycerol or a mixture of any two or more thereof.
Claim 5
Dependent Claim
153 words
A pen characterised in that it comprises: (a) an elongated tube; (b) a pad of polyester fibres placed within said tube and impregnated with a water-colour fluorescent ink; (c) a core member in the form of a bundle of long polyester fibres, said core member having an inner end touching said pad and an outer end projecting from one end of said tube to constitute a tip of the pen; and (d) said water-colour fluorescent ink comprising (1) 30 to 70% by weight of a dyed material obtained by providing a monomeric mixture consisting of 10 to 80% by weight of acrylonitrile, 0.5 to 20% by weight of (metha)acrylic acid, and the balance of styrene, emulsifying and polymerising said monomeric mixture to provide emulsified polymers of a particle diameter less than 0.5µ, and dyeing said emulsified polymers with a fluorescent dye, and (2) 5 to 35% by weight of a hydrophilic organic solvent.
Claim 6
Dependent Claim
153 words
A pen characterised in that it comprises: (a) an elongated tube; (b) a pad of polyester fibres placed within said tube and impregnated with a water-colour fluorescent ink; (c) a core member in the form of a bundle of long polyester fibres, said core member having an inner end touching said pad and an outer end projecting from one end of said tube to constitute a tip of the pen; and (d) said water-colour fluorescent ink comprising (1) 30 to 70% by weight of a dyed material obtained by providing a monomeric mixture consisting of 10 to 80% by weight of acrylonitrile, 0.5 to 20% by weight of (metha)acrylic acid, and the balance of styrene, emulsifying and polymerising said monomeric mixture to provide emulsified polymers of a particle diameter less than 0.5µ, and dyeing said emulsified polymers with a fluorescent dye, and (2) 5 to 35% by weight of a hydrophilic organic solvent.
Claim 7
Dependent Claim
21 words
A pen as claimed in claim 4, characterised in that said monomeric mixture includes 30 to 55% by weight of acrylonitrile.
Claim 8
Dependent Claim
36 words
A pen as claimed in either claim 4 or claim 5, characterised in that said hydrophilic organic solvent comprises ethylene glycol, diethylene glycol, propylene glycol, dipropylene glycol, glycerol or a mixture of two or more thereof.
References Cited (Backward Citations)
No citation records indexed.
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