公开(公告)号：KR840000225B1

公开(公告)日：1984-02-29

申请号：KR800000138

申请日：1980-01-15

Applicant: RCA CORP

Inventor： MARTIN CARL J ,  VOELKER MARVIN J ,  RYAN ROBERT J

IPC: G11B11/06 ,  C08L27/06 ,  G11B9/06 ,  G11B11/00 ,  G11B11/08

公开(公告)号：PL221360A1

公开(公告)日：1980-09-22

申请号：PL22136080

申请日：1980-01-14

Applicant: RCA CORP

Inventor： MARTIN CARL J ,  VOELKER MARVIN J ,  RYAN ROBERT J

IPC: G11B11/06 ,  C08L27/06 ,  G11B9/06 ,  G11B11/00 ,  G11B11/08 ,  C08L

Abstract: An improved molding composition having a bulk resistivity below about 500 ohm-cm at 900 megahertz for compression molding video discs comprising sufficient conductive carbon black particles to obtain the desired conductivity, from about 1.5 to 4 percent by weight of stabilizers, from about 1 to 3 percent by weight of at least two lubricants, up to 10 percent by weight of plasticizers and processing aids, the remainder being a polyvinylchloride based resin, with the proviso that not more than about 5 percent by weight of liquid additives are present in said molding composition. Video discs molded from said composition have improved dimensional stability.