Stauffer Chemical Company

Sophia Y Liu

Francis A Via

Thomas A Hardy

Compounds having the formula ##STR1## in which Y is hydrogen, halogen, or C.sub.1 -C.sub.4 alkyl; R.sub.1 and R.sub.2 are independently hydrogen or methyl; and n is 1 or 2, are effective biocides or biostats for protection of plastic, polymeric or cellulosic materials against attack by microorganisms.

Biocidal agents for use in plastics, polymers and cellulosic materials

Flame retardant phosphonate derivatives of polyalkylene polyamines are prepared having the structural formula: ##STR1## wherein R.sup.1, R.sup.2 and R.sup.5 can be the same or different substituted or nonsubstituted lower alkylene groups of about 2-10 carbons, or aryl groups of about 6-14 carbons; and R.sup.5 can also be haloalkyl of about 1-10 carbons;

Phosphonate derivatives of polyalkylene polyamines as flame retardants

Mono-alkyl acid phosphates having the formula: ##STR1## wherein R is straight or branched alkyl having from 1 to about 25 carbon atoms, are prepared by reacting alcohol with P.sub.2 O.sub.5. The process involves suspension of P.sub.2 O.sub.5 in a heel of product comprised of a mixture of mono-alkyl acid phosphate, di-alkyl acid phosphate and free H.sub.3 PO.sub.4. Alcohol is added to the heel last, followed by mixing, and then addition of water. A mixture of mono- and dialkyl acid phosphate is obtained with a mono-content of over about 70 percent by weight.

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Fremont, CA, United States of America

Sophia Y Liu