Atlantic Richfield Company

Mach I, Inc.

Statton, Gary L.

Gaul, James M.

Gary L Statton

James M Gaul

John S Babiec, Jr

Stephen Herbert Harris

Anja Ruebner

John P Consaga

Cyclodextrin polymers are nitrated to provide novel nitrate esters of cyclodextrin polymers which are useful for encapsulating explosives to provides energetic compositions of reduced sensitivity; a new method for the preparation of cyclodextrin polymers is provided.

Polymeric cyclodextrin nitrate esters

Fire retardant flexible polyurethane foams are prepared with reduced scorch and discoloration by the addition of a stabilizing amount of from about 1 to about 12 parts by weight of a cyclic alkylene carbonate to the formulation, based on the weight of the polyester polyol employed, without affecting the fire retardancy of the foam product.

Preparation of fire retardant flexible polyester based polyurethane

Polyoxyalkylene polyether polyols are stabilized against oxidative degradation by incorporating therein a synergistic stabilizing composition containing (1) a mixture of butylated phenols consisting of 2-tertiary butyl phenol, 3,5-ditertiary butyl-4-hydroxyhydrocinnamate and 1,6-hexamethylene bis(3,5-ditertiary-butyl-4-hydroxyhydrocinnamate) or tetrakis [methylene(3,5-ditertiary butyl-4-hydroxyhydrocinnamate)] methane (2) a p,p'-dialkyldiphenylamine such as p,p'-dioctyldiphenylamine and (3) a phenothiazine compound. Polyurethane foams are stabilized against scorching when the stabilized polyols are utilized in the foam preparation or the stabilizing composition is added with other reactants.

Stabilized polyoxyalkylene polyether polyols and polyurethane foams

Liquid reaction product mixtures of diphenylmethane diisocyanates and polymethylene polyphenyl isocyanates resulting from the thermal decomposition of the corresponding carbamates produced by the acid condensation of an N-aryl carbamic acid ester, such as ethylphenylcarbamate, with formaldehyde are storage stabilized against an increase in viscosity and decrease in free NCO content, by incorporating therein an effective amount of a dichloroparabanic acid compound having the formula ##STR1## wherein R is an alkyl group of from 1 to 4 carbon atoms or a phenyl group which may be substituted with a 1 to 4 carbon atom alkyl group.

Dichloroparabanic acid stabilized diphenylmethane

Liquid reaction product mixtures of diphenylmethane diisocyanates and polymethylene polyphenyl isocyanates resulting from the thermal decomposition of the corresponding carbamates produced by the acid condensation of an N-aryl carbamic acid ester, such as ethylphenylcarbamate, with formaldehyde are storage stabilized against an increase in viscosity and decrease in free NCO content, by incorporating therein an effective amount of a compound having the formula ##STR1## wherein x plus y is equal to 3 and z is an integer of from 0 to 3.

Oxazoline stabilized diphenylmethane diisocyanate-polymethylene

Liquid reaction product mixtures of diphenylmethane diisocyanates and polymethylene polyphenyl isocyanates resulting from the thermal decomposition of the corresponding carbamates produced by the acid condensation of an N-aryl carbamic acid ester, such as ethylphenylcarbamate, with formaldehyde are storage stabilized against an increase in viscosity and decrease in free NCO content, by incorporating therein an effective amount of a compound having the formula ##STR1## wherein R is hydrogen or an alkyl group having up to 4 carbon atoms, x plus y is equal to 3 and z is an integer of from 0 to 3.

Stabilized diphenylmethane diisocyanate-polymethylene polyphenyl

Polyurethane compositions having improved tensile strength and tear strength are prepared by graft polymerizing an ethylenically unsaturated monomer onto a liquid, hydroxyl-containing diene polymer and reacting the resulting graft copolymer with a polyfunctional organic isocyanate. Conventional catalysts and polymerization procedures are employed.

Process for preparing polyurethane elastomers

Thermoplastic polyurethane-polymer compositions having improved elastic properties are prepared by reacting hydroxylated diene polymers with diisocyanates in the presence of about 10 to 50% of a diamine, based on the total weight of hydroxyl-terminated diene polymer and diamine, said diamine being a mixture of disecondary diamines and secondary-tertiary diamines and said mixture comprising 1 to 10% secondary-tertiary diamines.

Growing community of inventors

West Chester, PA, United States of America

Gary L Statton