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US 6,887,921 B2Granted
Ink follower composition for writing instruments, and process for its production
AssigneeThe Pilot Ink Co., Ltd.
InventorsHideaki Asami, Youichi Takasu
Life of this patent
Estimating the term…
Abstract
An ink follower composition to be provided at the rear end of an ink held directly in an ink container of a writing instrument and capable of going forward with consumption of the ink. The composition comprises at least one selected from an ethylene-α-olefin co-oligomer, an α-olefin oil, a purified mineral oil and a polybutene, and added thereto a specific fatty acid amide. This composition can simultaneously satisfy the two important performances conflicting with each other, the ink flow-back preventive performance and the ink follow-up performance.
Claims10
A composition comprising:
- (i) at least one oil selected from the group consisting of an ethylene-α-olefin co-oligomer, an α-olefin oil, a purified mineral oil and a polybutene, and (ii) at least one a fatty acid amide represented by Formulae (1) or (2):
- wherein R1 represents a saturated fatty acid, unsaturated fatty acid or hydroxyl fatty acid having 8 to 22 carbon atoms, and R2 represents an alkyl group, alkenyl group or cycloalkyl-substituted alkyl group having 8 to 22 carbon atoms, or
- wherein R3 independently represents a saturated fatty acid, unsaturated fatty acid or hydroxyl fatty acid having 8 to 22 carbon atoms, and R4 represents —(CH2)—, where n represents an integer of 1 to 8
- wherein, when provided in contact at the distal end of an ink held in an ink container of a writing instrument, is capable of moving forward with consumption of said ink while maintaining contact therewith.
1 more element
Dependencies are inferred from the claim text.