초록 ▼

A low density polymer composition including a polymer component capable of being cured, a low density filler in an amount sufficient to reduce the density of the polymer and a thixotrope present in a sufficient amount to impart a sufficient viscosity and to inhibit separation of the filler from the

A low density polymer composition including a polymer component capable of being cured, a low density filler in an amount sufficient to reduce the density of the polymer and a thixotrope present in a sufficient amount to impart a sufficient viscosity and to inhibit separation of the filler from the polymer until after the polymer is cured. The resulting lightweight, filled polymer composition is a strong electrical insulator, has low shrinkage, a low coefficient of thermal expansion, low cured density and a soft filler that does not harden the polymer. Methods of preparing and using the low density polymer compositions are also disclosed.

대표청구항 ▼

[ What is claimed is:] [1.] A low-density reactable composition for use in preparing a low density polymer composition, comprising:a first reactable polymer component in a liquid or gel state;a low density filler comprising a plurality of plastic microspheres distributed throughout the first polymer

[ What is claimed is:] [1.] A low-density reactable composition for use in preparing a low density polymer composition, comprising:a first reactable polymer component in a liquid or gel state;a low density filler comprising a plurality of plastic microspheres distributed throughout the first polymer component in an amount sufficient to reduce the density of the polymer composition; anda thixotrope comprising hydrogenated castor oil and a thixotropic clay present in an amount sufficient to inhibit separation of the filler from the polymer component until the polymer composition is prepared.