Stable-liquid isocyanurate-modified polyisocyanate compositions

Claim 2

A highly stable liquid isocyanurate-modified polyisocyanate composition prepared by heating an organic polyisocyanate at a temperature between 25° C. and 250° C. for a period of from one-half to five hours in the presence of a catalytic amount of an alkali metal or an alkaline earth metal hydroxamate selected from the group consisting of a compound described by the following formula: ##STR3## wherein R is alkyl, alkenyl, or alkynyl containing 1 to 10 carbon atoms, phenyl, tolyl, or benzyl, R' is H, alkyl, alkenyl, or alkynyl containing 1 to 10 carbon atoms, phenyl, tolyl, or benzyl, M is an alkali metal or an alkaline earth metal, and a compound described by the following formula: ##STR4## wherein R, R' and M are as defined above, x is 1 and y is any number from 0 to 2.

Claim 3

The polyisocyanate composition of claim 1 wherein said organic polyisocyanate is 4,4'-diphenylmethane diisocyanate.

Claim 4

The polyisocyanate composition of claim 1 wherein said organic polyisocyanate is toluene diisocyanate.

Claim 5

The isocyanurate-modified polyisocyanate composition of claim 1 wherein said alkali metal hydroxamate is selected from the group consisting of potassium acetohydroxamate, potassium octanohydroxamate, potassium decanohydroxamate and potassium benzohydroxamate.

Claim 6

The isocyanurate-modified polyisocyanate composition of claim 1 wherein the concentration of said catalyst is from 0.001 part to 5.0 parts per 100 parts of said organic polyisocyanate.

Claim 7

A process for preparing a highly stable liquid isocyanurate-modified polyisocyanate composition prepared by heating an organic polyisocyanate at a temperature between 25° C. and 250° C. for a period of from one-half to five hours in the presence of a catalytic amount of an alkali metal or an alkaline earth metal hydroxamate selected from the group consisting of a compound described by the following formula: ##STR5## wherein R is alkyl, alkenyl, or alkynyl containing 1 to 10 carbon atoms, phenyl, tolyl, or benzyl, R' is H, alkyl, alkenyl, or alkynyl containing 1 to 10 carbon atoms, phenyl, tolyl or benzyl, M is an alkali metal or an alkaline earth metal, and a compound described by the following formula: ##STR6## wherein R, R', and M are as defined above, x is 1 and y is any number from 0 to 2.

Claim 8

A process for preparing a highly stable liquid isocyanurate-modified polyisocyanate composition prepared by heating an organic polyisocyanate at a temperature between 25° C. and 250° C. for a period of from one-half to five hours in the presence of a catalytic amount of an alkali metal or an alkaline earth metal hydroxamate selected from the group consisting of a compound described by the following formula: ##STR5## wherein R is alkyl, alkenyl, or alkynyl containing 1 to 10 carbon atoms, phenyl, tolyl, or benzyl, R' is H, alkyl, alkenyl, or alkynyl containing 1 to 10 carbon atoms, phenyl, tolyl or benzyl, M is an alkali metal or an alkaline earth metal, and a compound described by the following formula: ##STR6## wherein R, R', and M are as defined above, x is 1 and y is any number from 0 to 2.

Claim 9

The process of claim 6 wherein said organic polyisocyanate is 4,4'-diphenylmethane diisocyanate.

Claim 10

The process of claim 6 wherein said organic polyisocyanate is toluene diisocyanate.

Claim 11

The process of claim 6 wherein said alkali metal hydroxamate is selected from the group consisting of potassium acetohydroxamate, potassium octanohydroxamate, potassium decanohydroxamate and potassium benzohydroxamate.

Claim 12

The process of claim 6 wherein the concentration of said catalyst is from 0.001 part to 5.0 parts per 100 parts of said organic polyisocyanate.