公开(公告)号：JPH03152116A

公开(公告)日：1991-06-28

申请号：JP22851890

申请日：1990-08-31

Applicant: BASF AG

Inventor： MIHIYAERU BOBURITSUHI ,  AUGUSUTO REENAA ,  ARUBERUTO KOORU ,  RUDORUFU ZUYUTEINGAA ,  UBUE KEPERAA ,  BUERUNAA RENTSU ,  HERUMAN RORAA ,  HERUMUUTO KOPUKE ,  GIYUNTAA SHIYURUTSU

IPC: C08G18/12 ,  C08G18/38 ,  C08G18/50 ,  C08G18/65 ,  C08G18/66 ,  C08G18/76 ,  C08L75/04 ,  C09D5/23 ,  C09D175/00 ,  C09D175/04 ,  G11B5/702

公开(公告)号：JPH03152115A

公开(公告)日：1991-06-28

申请号：JP22851590

申请日：1990-08-31

Applicant: BASF AG

Inventor： MIHIYAERU BOBURITSUHI ,  AUGUSUTO REENAA ,  ARUBERUTO KOORU ,  RUDORUFU ZUYUTEINGAA ,  UBUE KEPERAA ,  BUERUNAA RENTSU ,  HERUMAN RORAA ,  HERUMUUTO KOPUKE ,  GIYUNTAA HIYURUTSU

IPC: C08G18/12 ,  C08G18/38 ,  C08G18/50 ,  C08G18/65 ,  C08G18/66 ,  C08L75/04 ,  C09D5/23 ,  C09D175/00 ,  C09D175/04 ,  G11B5/702

公开(公告)号：JPH03152114A

公开(公告)日：1991-06-28

申请号：JP22851490

申请日：1990-08-31

Applicant: BASF AG

Inventor： UBUE KEPERAA ,  BUERUNAA RENTSU ,  GIYUNTAA SHIYURUTSU ,  ARUBERUTO KOORU ,  MIHIYAERU BOBURITSUHI ,  AUGUSUTO REENAA ,  HERUMAN RORAA ,  RUDORUFU ZUYUTEINGAA

IPC: C08G18/12 ,  C08G18/61 ,  C08G18/65 ,  C08G18/66 ,  C08G18/76 ,  C08L75/04 ,  C09D5/23 ,  C09D175/00 ,  C09D175/04 ,  G11B5/702

公开(公告)号：JPH03152713A

公开(公告)日：1991-06-28

申请号：JP22851790

申请日：1990-08-31

Applicant: BASF AG

Inventor： MIHIYAERU BOBURITSUHI ,  HERUMAN RORAA ,  AUGUSUTO REENAA ,  UBUE KEPERAA ,  RUDORUFU ZUYUTEINGAA ,  BUERUNAA ROTSUHO ,  BUERUNAA RENTSU ,  GIYUNTAA SHIYURUTSU

IPC: C08G18/12 ,  C08G18/61 ,  C08G18/65 ,  C08G18/66 ,  C08G18/76 ,  C08L75/04 ,  C09D5/23 ,  C09D175/00 ,  C09D175/04 ,  G11B5/702

Abstract: PURPOSE: To improve a slippery characteristic and to lessen friction by using a nonmagnetic base body material and magnetic material powder in a binder contg. at least 50wt.% thermoplastic polyurethane as chief materials and using the specific plastic polyurethane. CONSTITUTION: This magnetic recording carrier consists of the nonmagnetic base body material and the magnetic material powder in the binder contg. at least 50wt.% thermoplastic polyurethane as the chief materials and has at least one layer of magnetic layers adhered and formed on a base body. In such a case, the thermoplastic polyurethane has 30 to 160 pieces and more particularly 40 to 80 pieces of OH groups and has a mol.wt. from 4000 to 30000 corresponding to a K value of 20 to 45 (measured as 1% soln. in DMF). As a result, the recording carrier having the improved wear resistance and decreased coefft. of friction is obtd.

公开(公告)号：JPH02226517A

公开(公告)日：1990-09-10

申请号：JP32856389

申请日：1989-12-20

Applicant: BASF AG

Inventor： AUGUSUTO REENAA ,  RUDORUFU ZUYUTEINGAA ,  MIHIYAERU BOBURITSUHI ,  HERUMAN DEIKOBU ,  HERUMAN RORAA ,  BUERUNAA RENTSU ,  RUUTOBUIHI KURAITONAA ,  BUERUNAA ROTSUHO ,  NORUBERUTO SHIYUNAIDAA

IPC: C09D5/23 ,  C09D127/04 ,  C09D127/06 ,  C09D175/00 ,  C09D175/04 ,  G11B5/70 ,  G11B5/702 ,  G11B5/706

Abstract: PURPOSE: To stabilize long-time use without deteriorating magnetic characteristics by constituting a magnetic recording carrier of a polymer binder and ferromagnetic chromium dioxide finely dispersed into customarily used additives and additionally incorporating a multiple unsatd. org. compd. monomer specified in its content into the chromium dioxide. CONSTITUTION: The magnetic recording medium is mainly composed of a nonmagnetic carrier material, the polymer binder and the intrinsically ferromagnetic chromium dioxide finely dispersed into the customarily used additives and 0.1 to 8wt.% multiple unsatd. org. compd. monomer is additionally incorporated into the chromium dioxide. The monomer is a monomer having at least three double bonds per molecule, for which one kind of the compd. selected from a group consisting of linolenic acid or oil or oil-fatty acid mixture is used. More specifically, alcohol, acid, ester, diglyceride, 2,4-hexadienic acid, herring oil, sardine oil, etc., are used as the multiple unsatd. org. compd. to accelerate dispersion.

公开(公告)号：JPH02223012A

公开(公告)日：1990-09-05

申请号：JP32856289

申请日：1989-12-20

Applicant: BASF AG

Inventor： AUGUSUTO REENAA ,  RUDORUFU ZUYUTEINGAA ,  MIHIYAERU BOBURITSUHI ,  HERUMAN DEIKOBU ,  HERUMAN RORAA ,  BUERUNAA RENTSU ,  RUUTOBUIHI KURAITONAA ,  BUERUNAA ROTSUHO ,  NORUBERUTO SHIYUNAIDAA

IPC: C09D5/23 ,  C09D129/04 ,  C09D175/00 ,  C09D175/04 ,  G11B5/702 ,  G11B5/706

Abstract: PURPOSE: To exhibit excellent stability to the deterioration of magnetic characteristics by forming a magnetic recording carrier of a nonmagnetic carrying material, polymer binder and magnetic material consisting of chromium dioxide as chief materials and forming a specific magnetizable layer on the carrying material. CONSTITUTION: This magnetic recording carrier is formed of the nonmagnetic carrying material, the polymer binder and the magnetic material consisting of the chromium dioxide as the chief materials and the magnetizable layer adhered on the carrying material. One kind of the org. compds. selected from a group consisting of steric hindrance phenol, cresol, arom. amine, benztriazole, triazine deriv., phosphorus-contg. acid ester, phenolic phosphate, its metal salt, benzophenone, substd. phenyl ester benzoate and thioacid alkyl ester are additionally incorporated into the magnetizable layer at 0.1 to 8wt.% of the weight of the chromium dioxide. As a result, the magnetic recording carrier exhibits the improved stability to the chemical decomposition by moisture and oxidative compds. without entailing the deterioration of the magnetic characteristics.