Stock material or miscellaneous articles – Composite – Of inorganic material
Patent
1988-08-03
1990-06-26
Henderson, Christopher
Stock material or miscellaneous articles
Composite
Of inorganic material
428900, 524431, 524435, G11B 570
Patent
active
049371517
ABSTRACT:
The invention provides a coating composition used for forming a magnetic layer on the surface of substrates to prepare magnetic recording media, e.g., recording tapes, of which the characteristic ingredient is a novel copolymeric resin. The copolymeric resin is a partial or complete saponification product of a copolymer obtained by the copolymerization of 4 types of comonomers in a spe-cified proportion including (1) vinyl chloride, (2) vinyl acetate, (3) a monomer having an ethylenically unsaturated polymerizable group and an epoxy group in the same molecule and (4) a monomer having an ethylenically unsaturated polymerizable group in the form of a sulfonic acid or a metal salt thereof. The vinyl acetate moiety is converted into a vinyl alcohol moiety partially or completely by the saponification. This copolymeric resin is advantageous in respect of the dispersibility of the ferromagnetic particles and the high crosslinkability which serves to improve the durability of the magnetic recording medium prepared by using the resin.
REFERENCES:
patent: 4818606 (1989-04-01), Koyama
patent: 4828924 (1989-05-01), Shoji
patent: 4828925 (1989-05-01), Miyake
Ishida Tateo
Yasuhara Yoshiyuki
Henderson Christopher
Nissin Chemical Industry Co. Ltd.
LandOfFree
Coating composition with vinyl chloride polymer for magnetic rec does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Coating composition with vinyl chloride polymer for magnetic rec, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Coating composition with vinyl chloride polymer for magnetic rec will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1125167