Compositions and methods are provided for reducing, inhibiting, or preventing corrosion of a surface, the polyamine compounds corresponding to the structure of Formula 1 or 2, or a salt thereof:

##STR(1)##

wherein X.sub.1 is —C(O)R.sub.9 or —[C(R.sub.10R.sub.11)].sub.p—C(R.sub.12)(X.sub.2)—R.sub.13; X.sub.2 is —OH or —NH.sub.2; R.sub.1 and R.sub.4 are independently hydrogen, alkyl, or —[C(R.sub.10R.sub.11)].sub.p—C(R.sub.12)(X.sub.2)—R.sub.13; R.sub.2, R.sub.3, R.sub.5, R.sub.6, R.sub.7, R.sub.8, R.sub.10, R.sub.11, and R.sub.12 are independently hydrogen or alkyl; R.sub.9 and R.sub.13 are independently C.sub.7 to C.sub.30 alkyl or alkenyl; m and o are integers from 1 to 10; n is an integer from 1 to 6; and p is an integer from 1 to 10;

##STR(2)##

wherein X.sub.2 is —OH or —NH.sub.2; R.sub.21, R.sub.22, R.sub.23, R.sub.24, R.sub.25, R.sub.26, and R.sub.28 are independently hydrogen or alkyl; R.sub.27 is C.sub.10 to C.sub.30 alkyl or alkenyl; m and o are integers from 1 to 10; n is an integer from 1 to 6; and q is an integer from 0 to 10.

Compositions and methods are provided for reducing, inhibiting, or preventing corrosion of a surface, the polyamine compounds corresponding to the structure of Formula 1 or 2, or a salt thereof:

##STR(1)##

wherein X.sub.1 is —C(O)R.sub.9 or —[C(R.sub.10R.sub.11)].sub.p—C(R.sub.12)(X.sub.2)—R.sub.13; X.sub.2 is —OH or —NH.sub.2; R.sub.1 and R.sub.4 are independently hydrogen, alkyl, or —[C(R.sub.10R.sub.11)].sub.p—C(R.sub.12)(X.sub.2)—R.sub.13; R.sub.2, R.sub.3, R.sub.5, R.sub.6, R.sub.7, R.sub.8, R.sub.10, R.sub.11, and R.sub.12 are independently hydrogen or alkyl; R.sub.9 and R.sub.13 are independently C.sub.7 to C.sub.30 alkyl or alkenyl; m and o are integers from 1 to 10; n is an integer from 1 to 6; and p is an integer from 1 to 10;

##STR(2)##

wherein X.sub.2 is —OH or —NH.sub.2; R.sub.21, R.sub.22, R.sub.23, R.sub.24, R.sub.25, R.sub.26, and R.sub.28 are independently hydrogen or alkyl; R.sub.27 is C.sub.10 to C.sub.30 alkyl or alkenyl; m and o are integers from 1 to 10; n is an integer from 1 to 6; and q is an integer from 0 to 10.

Diaryl amines are selectively alkylated by reaction with branched olefins, which olefins are capable of forming tertiary carbonium ions and can be conveniently prepared from readily available branched alcohols. The diaryl amine products are effective antioxidants and often comprise a high amount of di-alkylated diaryl amines and a low amount of tri- and tetra-alkylated diaryl amines.

Diaryl amines are selectively alkylated by reaction with branched olefins, which olefins are capable of forming tertiary carbonium ions and can be conveniently prepared from readily available branched alcohols. The diaryl amine products are effective antioxidants and often comprise a high amount of di-alkylated diaryl amines and a low amount of tri- and tetra-alkylated diaryl amines.

A gas phase rust-resisting material for various metals includes, calculated in parts by weight, following components of: 78.5 to 95.5 parts of benzotriazole, 78.5 to 95.5 parts of dicycloethylamine nitrite, 500 to 800 parts of octadecylamine, 9000 to 11000 parts of ethanol, 33.5 to 38.5 parts of a reinforcing agent and 23.5 to 25.5 parts of a rust-resistant microcapsule. Further disclosed is a method for preparing the gas phase rust-resisting material which is suitable for various metals.

A gas phase rust-resisting material for various metals includes, calculated in parts by weight, following components of: 78.5 to 95.5 parts of benzotriazole, 78.5 to 95.5 parts of dicycloethylamine nitrite, 500 to 800 parts of octadecylamine, 9000 to 11000 parts of ethanol, 33.5 to 38.5 parts of a reinforcing agent and 23.5 to 25.5 parts of a rust-resistant microcapsule. Further disclosed is a method for preparing the gas phase rust-resisting material which is suitable for various metals.

The present invention relates to the use of efficient phosphorous substances, in particular based on diphenylamine and heterocyclic diphenylamine derivatives as stabilizers for organic materials, in particular for plastic materials, against oxidative, thermal and/or actinic degradation. The present invention additionally relates to an organic material that has been correspondingly stabilized as described above. The invention further relates to a method of stabilizing organic materials and to specific stabilizers.

The present invention relates to the use of efficient phosphorous substances, in particular based on diphenylamine and heterocyclic diphenylamine derivatives as stabilizers for organic materials, in particular for plastic materials, against oxidative, thermal and/or actinic degradation. The present invention additionally relates to an organic material that has been correspondingly stabilized as described above. The invention further relates to a method of stabilizing organic materials and to specific stabilizers.

Provided herein are compositions and methods for controlling enzyme-induced urea decomposition attendant to the application of solid or liquid urea-containing fertilizers to soils. More particularly, the subject matter disclosed herein is concerned with selected triarylmethane compounds as urease inhibitors and their use, either alone or in combination with tetrapolymer synergists. Further, the disclosed compositions have good storage stability, long-lived activity in soil, and avoid the toxicity issues common with present-day urease inhibitors used in agriculture.

Provided herein are compositions and methods for controlling enzyme-induced urea decomposition attendant to the application of solid or liquid urea-containing fertilizers to soils. More particularly, the subject matter disclosed herein is concerned with selected triarylmethane compounds as urease inhibitors and their use, either alone or in combination with tetrapolymer synergists. Further, the disclosed compositions have good storage stability, long-lived activity in soil, and avoid the toxicity issues common with present-day urease inhibitors used in agriculture.