The Dow Chemical Company

Other

Ronald H Cooper

R Douglas Eash

Tag Y Moon

Gale L Emig

A fluid injector for internal combustion engines in which the fluid flow to the engine is indicated in the driver's compartment and in which a mixing chamber in the compartment communicates with a primary vacuum line of the engine and with a fluid reservoir. A valve is disposed between the reservoir and the chamber to prevent the flow of fluid from the reservoir when the engine is not running. A needle valve is disposed in a fluid inlet port for adjusting the volume of fluid entering the chamber. An adjustable air inlet port is disposed in the chamber, and a vacuum gauge is provided for monitoring the vacuum in the chamber. The vacuum from the primary vacuum line draws fluid into the chamber from the reservoir, where the fluid mixes with air and the mixture is drawn to the engine carburetor.

Fluid injector for internal combustion engine

A method for preventing surface cracking of a portland cement mortar or concrete containing a film-forming polymeric modifier, comprising applying onto a fresh, non-cured mortar or concrete surface a substantially continuous coating comprising from about 0.06 to about 1 lb/yd.sup.2 of said mortar or concrete surface of a material selected from the group consisting of polyglycerine, glycerine and mixtures thereof.

Method of preventing surface cracking of portland cement mortar and

This invention pertains to improved shrinkage compensating portland cement concrete and mortar compositions comprising essentially an expansive portland cement, mineral aggregate, from about 5 to about 25 percent based on cement weight of a styrene-butadiene-1,3 copolymer having a styrene to butadiene weight ratio of about 30:70 to 70:30, water and certain minor amounts of nonionic and anionic surfactants, and a foam depressant. When properly restrained by either external restraints or internal restraints in the form of ordinary reinforcement or fibers of various lengths, these compositions possess improved mechanical and physical properties such as compressive and flexural strengths and unexpectedly enhanced freeze-thaw resistance. Such compositions are particularly suited for use in the construction of crack-free structures.

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Clare, MI, United States of America

Ronald H Cooper