At&t Technologies, Inc.

Bell Telephone Laboratories

At&t Bell Laboratories

Western Electric Company, Inc.

Jae H Choi

William C Vesperman

John J Mottine, Jr

William M Kanotz

Walter J Sparzak, Sr

Larry Edward Fortner

Walter D Tates

It has been found that the properties of poly(vinyl chloride) based polymers are substantially enhanced through the use of a specific plasticizer system. In particular, the use of specific triarylphosphates in combination with specific diarylphosphates in specific proportions not only plasticizes the PVC polymer but produces a transparent, flame retardant heat resistant, easily worked polymer. These materials are used so that the diarylphosphate is 30-45% of the total concentration of the phosphates and such that 45 to 70 parts of the phosphates are present per 100 parts of the polymer.

Modified polymer containing articles

A telephone cord employs as an insulator for the conductors therein an extrudable blend of a styrene-ethylenebutylene-styrene copolymer with polypropylene.

Extrudable blend

Insulating material for telephone cords and telephone cords

Insulating covering for strand material

The epoxy resin stabilizing systems in combination with cadmium containing stabilizers employed in PVC compounds are replaceable without affecting other properties of the polymer by utilizing a specific additive mixture. In particular, a complex ester of oleic acid and a diglycerol ester of oleic acid are employed in conjunction with a calcium-zinc composition. The resulting system yields excellent processing and long-term stability without significantly affecting other properties such as color stability and flame retardancy.

Stabilization of PVC bodies

A jacketed telephone cord is jacketed with a clear, flame retardant, stable composition which essentially does not exhibit vertical burn characteristics comprising an all phosphate plasticized PVC stabilized with the combination of a metallic stabilizer and a cycloaliphatic epoxy.

Coating composition and coated articles

Growing community of inventors

Warren, IN, United States of America

Jae H Choi