Phillips Petroleum Company

George M Allison, Iii

Mason S Wilt

In an aqueous drilling fluid, an improved thinning effect is obtained by adding a first agent comprising a sulfoalkylated tannin or heavy metal complex thereof, optionally in combination with a lignite, and a second agent comprising a metal compound containing tin, optionally in combination with a metal compound containing nickel or manganese, and wherein said metals can be present in the cation and/or anion portion of said metal compound.

Drilling fluids and thinners therefor

A highly branched copolymer particularly suitable for forming pressure sensitive adhesives prepared in the presence of specified amounts of tert-butylchloride. Conjugated diene monomers are copolymerized with monovinylaromatic monomers in the presence of an organolithium initiator and a suitable amount of tertiary butylchloride. The holding power of adhesives prepared thereby is greatly increased.

High strength diene/monovinyl aromatic copolymer-based adhesives

The holding power of hot melt adhesives is increased by the addition of poly(alpha-methylstyrene) and polyphenylene oxide.

Hot melt adhesive and additive therefor

This invention relates to the preparation of foundry molds and foundry cores using a low molecular weight high vinyl poly(1,3-butadiene).

Foundry refractory binder

Hot melt adhesive and additive therefore

A rubbery polymer sealant composition is provided that includes barium sulfate and a compound containing at least two acidic hydrogens wherein said acidic hydrogens are attached to oxygen atoms. The sealant composition has a good balance of properties, including texture, while having improved sag resistance and crack resistance.

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Bartlesville, OK, United States of America

George M Allison, Iii