MAGNETIC RECORDING MEDIA COMPRISING A CURED DISPERSION COATING OF A MAGNETIZABLE PIGMENT AND POLYURETHANE POLYMER CONTAINING A VINYL POLYMERIC SEGMENT PENDANT FROM THE POLYURETHANE BACKBONE

• Main Authors: CARLSON, JAMERS G, ANDERSON, JEFFREY T
• Format: Patent
• Language: English; Korean
• Published: 15.05.1999
• Edition: 6
• Subjects: ADHESIVES; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; COMPOSITIONS BASED THEREON; CORRECTING FLUIDS; DYES; FILLING PASTES; INFORMATION STORAGE; INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER; INKS; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; PERFORMING OPERATIONS; PHYSICS; POLISHES; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; USE OF MATERIALS THEREFOR; WOODSTAINS

본 발명은 마크로 단량체 디올로 부터 제조된 비닐 술폰화 및 비-술폰화된 히드록시 작용성 폴리우레탄 공중합체 및 자기기록 매체에 사용방법에 관한 것이다. 설폰화된 히드록시 작용성 공중합체는 폴리우레탄 주쇄; 상기 폴리우레탄 주쇄에 현수된 적어도 하나의 SOM기, 상기 폴리우레탄 주쇄는 약 2000 내지 약 100,000의 SOM 당량을 가지며, M은 H, NR, (R은 H또는 알킬기임), Li, Na, K및 그 혼합물로 부터 선택되며, 상기 폴리우레탄 주쇄에 현수된 적어도 2개의 가교결합성 히드록시기들, 상기 폴리우레탄 주쇄는 약 500 내지 약 50,000의 히드록시 당량을 가지며, 및 상기 폴리우레탄 주쇄에 현수된 적어도 하나의 비닐 중합체 단편 B로 이루어진다. The invention relates to vinyl sulfonated and non-sulfonated hydroxy functional polyurethane copolymers prepared from macromonomer diols and their use in magnetic recording media. The sulfonated hydroxy functional copolymer comprises: a polyurethane backbone; at least one SO3M group pendant from the polyurethane backbone, wherein the polyurethane backbone has an SO3M equivalent weight of from about 2,000 to about 100,000, and wherein M is selected from the group consisting of H<+>, NR4+ wherein R can be H<+> or an alkyl group, Li<+>, Na<+>, K<+>, and mixtures thereof; at least two crosslinkable hydroxy groups pendant from the polyurethane backbone, wherein the polyurethane backbone has a hydroxy equivalent weight of from about 500 to about 50,000; and at least one vinyl polymeric segment B pendant from the polyurethane backbone.