Radiation barrier material and method of making the same

Claim 1

THE METHOD OF MAKING A RADIATION BARRIER WHICH COMPRISES: PREPARING A RELATIVELY VISCOUS RESIN DISPERSION FROM FINELY DIVIDED RESIN PARTICLES SUBSTANTIALLY UNIFORMLY DISTRIBUTED IN A LIQUID DISPERSANT AND SUFFICIENT GELLING AGENT TO IMPART THIXOTROPIC CHARACTERISTICS THERETO WITH AN INITIAL APPARENT VISCOSITY WHEN AT A STATE OF REST AT LEAST 20% HIGHER THATN THE VISCOSITY WHEN SUBJECTED TO SHEAR TO THAT IT CAN SUSPEND A RELATIVELY HIGHER PROPORTION OF THE HEREINAFTER MENTIONED HEAVY MEAL PARTICLES BUT WHICH APPARENT VISCOSITY DECREASES BY AT LEAST 20% WHEN THE DISPERSION IS SUBJECTED TO SHEAR SO THAT IT CAN BE READILY FORMED INTO VARIOUS ARTICLES, MIXING HEAVY METAL PARTICLES THEREWITH TO FORM A UNIFORM SUSPENSION OF THE HEAVY METAL PARTICLES IN THE DISPERSION WITH THE HEAVY METAL PARTICLES CONSTITUTING AT LEAST 85% BY WEIGHT OF THE RESULTING SUSPENSION, FORMING THE RESULTING SUSPENSION INTO AN ARTICLE OF THE DESIRED CONFIGURATION, AND CURING THE RESIN DESPERSION IN THE ARTICLE THUS FORMED TO PROVIDE A BARRIER MATERIAL WITH HEAVY PARTICLES SUBSTANTIALLY UNIFORMLY DISTRIBUTED IN THE RESIN BINDER.

Claim 2

THE METHOD OF MAKING A RADIATION BARRIER WHICH COMPRISES: PREPARING A RELATIVELY VISCOUS RESIN DISPERSION FROM FINELY DIVIDED RESIN PARTICLES SUBSTANTIALLY UNIFORMLY DISTRIBUTED IN A LIQUID DISPERSANT AND SUFFICIENT GELLING AGENT TO IMPART THIXOTROPIC CHARACTERISTICS THERETO WITH AN INITIAL APPARENT VISCOSITY WHEN AT A STATE OF REST AT LEAST 20% HIGHER THATN THE VISCOSITY WHEN SUBJECTED TO SHEAR TO THAT IT CAN SUSPEND A RELATIVELY HIGHER PROPORTION OF THE HEREINAFTER MENTIONED HEAVY MEAL PARTICLES BUT WHICH APPARENT VISCOSITY DECREASES BY AT LEAST 20% WHEN THE DISPERSION IS SUBJECTED TO SHEAR SO THAT IT CAN BE READILY FORMED INTO VARIOUS ARTICLES, MIXING HEAVY METAL PARTICLES THEREWITH TO FORM A UNIFORM SUSPENSION OF THE HEAVY METAL PARTICLES IN THE DISPERSION WITH THE HEAVY METAL PARTICLES CONSTITUTING AT LEAST 85% BY WEIGHT OF THE RESULTING SUSPENSION, FORMING THE RESULTING SUSPENSION INTO AN ARTICLE OF THE DESIRED CONFIGURATION, AND CURING THE RESIN DESPERSION IN THE ARTICLE THUS FORMED TO PROVIDE A BARRIER MATERIAL WITH HEAVY PARTICLES SUBSTANTIALLY UNIFORMLY DISTRIBUTED IN THE RESIN BINDER.