Non-aqueous ink for ball point pen, and ball point pen

Details Non-aqueous ink for ball point pen, and ball point pen Non-aqueous ink for ball point pen, and ball point pen

1998-11-19

1999-12-21

Bell, Mark L.

Compositions: coating or plastic

Coating or plastic compositions

Marking

C09D 1100

Patent

active

060043881

ABSTRACT:
A non-aqueous ink for a ball point pen is disclosed herein which is accompanied by the feature of the non-aqueous ink excellent in the so-called cap-off performance that a writing performance does not deteriorate even when the pen is allowed to stand, with a cap being removed, and the feature of an aqueous ink that a low writing pressure can be used and blobbing does not occur. This ink comprises an organic solvent having a vapor pressure of 0.2 mmHg (20.degree. C.) or less, a colorant and a coagulant and has a non-Newtonian viscosity index of 0.2 to 0.5 and a viscosity of 200 mPa.cndot.s (25.degree. C., 50 rpm) or less. Furthermore, the ink is characterized by containing a autolyophobic vehicle in which a contact angle to the surface of a material such as stainless steel or bronze having a high surface free energy is in the range of 5 to 40.degree..

REFERENCES:
patent: 3597244 (1971-08-01), Fookson et al.
patent: 4256494 (1981-03-01), Yamamoto et al.
patent: 4687791 (1987-08-01), Miyajima et al.

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