Magnetic recording medium comprising ferromagnetic powder and po

Details Magnetic recording medium comprising ferromagnetic powder and po Magnetic recording medium comprising ferromagnetic powder and po

1991-12-06

1992-10-06

Thibodeau, Paul J.

Stock material or miscellaneous articles

Composite

Of inorganic material

4284246, 4284259, 252 6254, G11B 500

Patent

active

051530791

ABSTRACT:
A magnetic recording medium is disclosed which comprises a non-magnetic support and a magnetic layer comprising a ferromagnetic powder having a specific surface area of not less than 55 m.sup.2 /g and at least two kinds of resins each containing repetitive units having a polar group selected from the group consisting of a --SO.sub.3 M group, a --OSO.sub.3 M group, a --COOM group and a --PO(OM').sub.2 group, wherein M is a hydrogen atom or an alkali metal atom, and M' is a hydrogen atom, an alkali metal atom or an alkyl group, and the glass transition points of said two resins are different not less than 60.degree. C. from each other. The recording medium is improved in the dispersibility of the ferromagnetic powder in the magnetic layer and has a satisfactory surface smoothness, high electromagnetic conversion characteristics and a satisfactory running durability.

REFERENCES:
patent: 4784907 (1988-11-01), Matsufuji et al.
patent: 4861655 (1989-08-01), Karle

Affiliated with

Also associated with

Rating

Magnetic recording medium comprising ferromagnetic powder and po does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Magnetic recording medium comprising ferromagnetic powder and po, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magnetic recording medium comprising ferromagnetic powder and po will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1188372