The Dow Chemical Company

Jacqueline S Kelyman

Daniel J Swart

George A Paul

William L Smith

Ladell Jones

Alternating copolyestercarbonate resins having repeating units of the formula: ##STR1## wherein R.sup.1 is para-phenylene; each R is independently an aromatic hydrocarbylene or inertly substituted aromatic hydrocarbylene, e.g., ##STR2## and x is a number from 0.05 to 0.65 exhibit physical properties such as heat resistance, clarity and impact strength that are superior to the comparable properties of corresponding random copolymers. Such resins are useful for making transparent tough films and molded articles having high heat resistance.

Alternating copolyestercarbonate resins

Alternating copolyestercarbonate resins having repeating units of the formula: ##STR1## wherein R.sup.1 is meta-phenylene and R is independently an aromatic hydrocarbylene or inertly substituted aromatic hydrocarbylene, e.g., ##STR2## exhibit physical properties such as heat resistance, clarity and impact strength that are superior to the comparable properties of corresponding random copolymers and exhibit physical properties such as impact strength and processability that are superior to the comparable properties of corresponding alternating copolyestercarbonates wherein R.sup.1 is para-phenylene. Such resins are useful for making transparent tough films and molded articles having high heat resistance.

Novel polyamines are disclosed which consist essentially of linear chains of the formula ##STR1## WHEREIN R is H or the acyl group of a fatty acid or an alkylsulfonic acid and n is a number about 6-22. Of the n units in the chain, in about 0 to 50% R is an acyl group of about 20-150 carbon atoms, in about 5-75% R is an acyl group of about 1-18 carbon atoms and in about 10-90% R is H. The compounds are made by appropriate partial acylation of the corresponding polyethylenepolyamine or by (a) polymerizing a 2-alkyl-2-oxazoline and then partially hydrolyzing and reacylating the polymer thus obtained. They are useful as surfactants, especially as detergents in lubricating oils.

Oleophilic amidopolyethylenepolyamines

Oil soluble polymers corresponding to the formula ##STR1## are ashless oil dispersants in lubricating oils and fuels. In formulas I and II, R is a saturated or substantially saturated polyolefin having a molecular weight of at least about 250; R.sub.1 is hydrogen or ##STR2## wherein R.sub.2 is hydrogen or alkyl of from 1 to about 18 carbon atoms with at least about 60 percent of the R.sub.1 groups being ##STR3## X is ##STR4## Y is a terminal group; and n is from 2 to about 15.

Ashless oil dispersants

Alternating copolyestercarbonate resins having repeating units of the formula: ##STR1## wherein each R is independently an aromatic hydrocarbylene or inertly substituted aromatic hydrocarbylene, e.g., ##STR2## exhibit physical properties such as heat and impact resistance that are superior to the heat and impact resistance of corresponding random copolymers. Such resins are useful for making transparent tough films and molded articles having high heat resistance.

The title compounds are prepared by contacting a linear, acylated polyalkylenepolyamine, such as poly(N-propionyl)ethylenimine, and a diisocyanate, such as toluene diisocyanate, at a temperature of about 30.degree.-200.degree. C. These novel, crosslinked polyalkylenepolyamines are useful water absorbants and bleach Kraft-pulp effluent decolorants.

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Midland, MI, United States of America

Jacqueline S Kelyman