| http://www.w3.org/ns/prov#value | - Optional components of the foam systems of this invention include: polymeric stabilizers and thickeners such as polysaccharides, partially hydrolyzed protein, starches, polyvinyl resins, e.g. polyvinyl alcohol and polyacrylamides, carboxyvinyl polymers, and poly(oxyethylene) glycol; foam stabilizers such as ethylene glycol, diethylene glycol, glycerol, ethyl CELLOSOLVE, and butyl CARBITOL; foam to
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