Organic phosphites act as polymer stabilizers.

From: Rubber & Plastics News | Date: June 26, 2000| Author: Corp, Daryl Stein Dover Chemical; Stevenson, Don R. | Copyright information

Organic phosphites are used widely as a stabilizer in many polymers. They help maintain physical properties such as color and molecular weight during processing. Phosphites first were used to stabilize "light color" rubber. For example, trisnonylphenyl phosphite can be emulsified and added to rubber latex as an aqueous emulsion. This is still a major use for TNPP. Around 1951, phosphites were being evaluated as plasticizers for polyvinyl chloride and it was found that phosphites co...

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