Patent ID: 8030389

Claim:
A thermal insulation composition comprising: aqueous base; from about 0.28 kg/m 3 (0.1 lb/bbl) to about 35 kg/m 3 (12 lb/bbl) polymeric viscosifier comprising sulfonate moiety; from about 14.3 kg/m 3 (5 lb/bbl clay) to about 428.6 kg/m 3 (150 lb/bbl) clay; and, from about 0.28 kg/m 3 (0.1 lb/bbl) to about 14.3 kg/m 3 (5 lb/bbl) deflocculant comprising cyclic diketene monomer having the following general structure: wherein X is selected from the group consisting of oxygen and nitrogen; and, R 9 and R 10 independently are selected from the group consisting of hydrogen and alkyl groups; and, styrene monomer having the following structure: wherein R 11 , R 12 , and R 13 independently are selected from the group consisting of hydrogen and an alkyl groups.