公开(公告)号：JPS6285085A

公开(公告)日：1987-04-18

申请号：JP21903385

申请日：1985-10-03

Applicant: MITSUI TOATSU CHEMICALS

Inventor： KUNIHIRO NAONOBU ,  HIROTA SHOJI ,  MASUTANI SHIGEYORI

IPC: D06P1/16 ,  D06P3/00 ,  D06P3/54

公开(公告)号：JPS6474284A

公开(公告)日：1989-03-20

申请号：JP22847987

申请日：1987-09-14

Applicant: MITSUI TOATSU CHEMICALS

Inventor： KOSHIDA HITOSHI ,  SAKAKAWA TETSUO ,  MASUTANI SHIGEYORI ,  MUGITANI TETSUHIRO ,  MURATA SHINJI

IPC: C08K9/04 ,  C09K3/00

Abstract: PURPOSE:To obtain an ultraviolet absorber that gives a dyed polyester fiber and a dyed resin a lens of eyeglasses both having excellent lightfastness, by incorporating a specified dispersing agent into an ultraviolet-absorbing compound, and finely grinding the mixture. CONSTITUTION:A heat-resistant ultraviolet-absorbing compound {e.g., 2,2- methylenebis [ 4-( 1,1,3,3-tetramethylbutyl )-6-(2H-benzotriazol-2-yl) phenol ]}is mixed with a dispersing agent based on lignin or a condensate of naphthalenesulfonic acid with formalin. The formed mixture is dried and ground into a fine powder, thus giving an ultraviolet absorber. This ultraviolet absorber is used for high-temperature dyeing and thermosol dyeing of fiber, such as polyester fiber, and resin for a lens of eyeglasses.

公开(公告)号：JPS58163787A

公开(公告)日：1983-09-28

申请号：JP3939582

申请日：1982-03-15

Applicant: MITSUI TOATSU CHEMICALS

Inventor： KUNIHIRO NAONOBU ,  KUNINOBU HIROMASA ,  MASUTANI SHIGEYORI

IPC: D06P3/00 ,  D06P3/08

公开(公告)号：JPH01287189A

公开(公告)日：1989-11-17

申请号：JP11479488

申请日：1988-05-13

Applicant: MITSUI TOATSU CHEMICALS

Inventor： SAKAKAWA TETSUO ,  KOSHIDA HITOSHI ,  MASUTANI SHIGEYORI ,  KUNII KOJI

IPC: G02C7/02 ,  C09K3/00 ,  G02B1/10

Abstract: PURPOSE:To obtain the title ultraviolet light absorber useful for improving the light fastness of dyes for resins for spectacle lens, by pulverizing a ultraviolet light-absorbing compound dyeable in aqueous system in the presence of a lignin-based dispersant. CONSTITUTION:A benzophenone-based ultraviolet light absorber dyeable in aqueous system of the formula (R1 and R2 are each OH; R3 and R4 are each methoxy, ethoxy, propoxy, or butoxy) is pulverized in the presence of a lignin- based dispersant, using e.g., a sand grinder, dried, and ground, thus, obtaining the objective ultraviolet light absorber pref. 1-40mu in mean particle size.