The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 06, 1989
Filed:
Jul. 31, 1986
Edward R Harrell, White Bear Lake, MN (US);
Norman E Rustad, Shoreview, MN (US);
Deral T Mosbey, Cottage Grove, MN (US);
Minnesota Mining and Manufacturing Company, St. Paul, MN (US);
Abstract
Flexible magnetic recording media and stable-fluid, reactive dispersions of polymeric binder materials and particulate solids (either magnetic or non-magnetic) useful in preparing flexible or rigid magnetic recording media are provided. The use of a crosslinkable dispersing polymer comprised of a vinyl aromatic monomer and an ethylenically unsaturated monomer having hydroxyl functionality allows for magnetic media having both an excellent dispersion of finely divided magnetic particles, which improves the magnetic properties of the media, and an excellent set of mechanical characteristics, such as flexural modulus and tensile strength, of the magnetic media. The dispersing copolymer is used in an amount of at least about 5% by weight of the crosslinked binder mixture of which the crosslinkable dispersing polymer is a part.