Conductive molding composition and discs therefrom

Patent 4299736 Issued on November 10, 1981. Estimated Expiration Date:

May 19, 2000. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

3546150

3842194

3842217

3909517

Disc record and method of compounding disc record composition
Patent #: 3960790
Issued on: 06/01/1976
Inventor: Khanna

Vinyl chloride based injection molding composition
Patent #: 4129536
Issued on: 12/12/1978
Inventor: Martin , et al.

Molding composition
Patent #: 4151132
Issued on: 04/24/1979
Inventor: Khanna

Granular pigment composition
Patent #: 4154622
Issued on: 05/15/1979
Inventor: Momoi , et al.

Pigment compositions and process for dust free pigment beads
Patent #: 4194921
Issued on: 03/25/1980
Inventor: Wheeler , et al.

Conductive molding composition Patent #: 4228050
Issued on: 10/14/1980
Inventor: Martin , et al.

Inventor

Datta, Pabitra

Assignee

RCA Corporation

Application

No. 06/151361 filed on 05/19/1980

US Classes:

252/506, With metal compound252/511, Resin, rubber, or derivative thereof containing260/998.16, SOUND RECORD369/126, Electrical modification or sensing of storage medium (e.g., capacitive, resistive, electrostatic charge)369/276, Electrical track structure523/174, Phonograph record molding composition or process of preparing523/215, Product having elemental carbon524/495Mixing with carbon, e.g., graphite, etc., having numerical limitations, other than amount, e.g., included herein are particle size, surface area, etc., or composition or product thereof, DNRM

Examiners

Primary: Michl, Paul R.

Attorney, Agent or Firm

International Classes

C08K 9/00 (20060101)
C08K 9/04 (20060101)
G11B 9/00 (20060101)
G11B 9/06 (20060101)

Abstract

Polyvinyl chloride base molding compositions containing conductive carbon particles which have been treated with a fatty acid chloride have reduced melt viscosities, improved processabilities, and increased electrical conductivities, as well as improved dispersion of the carbon particles in the molding compositions. High density information discs having improved playback performance can be readily molded from these compositions.