Aminoplast dispersions and polyurethanes prepared therefrom

Claim 2

In a process which comprises preparing amino-plast condensates by the oligocondensation or polycondensa-tion of substances which are capable of aminoplast formation, the improvement wherein said oligocondensation or said poly-condensation is conducted in an organic polyhydroxyl compound having a molecular weight of from about 250 to about 14,000, such that a storage stable aminoplast dispersion having a solids content of from about 5 to about 45% by weight is produced.

Claim 3

The process of Claim 1, wherein said organic polyhydroxyl compound is a polyhydroxyl polyether with a molecular weight between about 250 and about 4,000.

Claim 4

The process of Claim 1, wherein said amino-plast condensates are prepared by first preparing a precon-densate containing alkylol groups in the absence of said polyhydroxyl compound and then condensing said preconden-sates in said polyhydroxyl compound.

Claim 5

The process of Claim 1, wherein said dispersion is formed by condensing (A) A compound of the group consisting of: (i) ammonia, (ii) hydrazine, and (iii) an organic compound having a molecular weight of from about 50 to about 400 and which contains at least two groups selected from the group consisting of -NH2 and -NH-, with (B) a compound of the group consisting of (i) a compound of the formula R-CO-R', in which R and R' may both represent hydro-gen or in which one of R or R' represents hydrogen and the other represents a radi-cal selected from the group consisting of C1-C4 alkyl groups which may carry chlorine substituents, C2-C4 alkenyl groups, C6-C10 aromatic hydrocarbon groups, and C5-C10 cycloalkyl groups, and (ii) semi-acetals obtained by reacting said compound of the formula R-CO-R' with mono-hydric or dihydric aliphatic alcohols having one to ten carbon atoms, in said organic polyhydroxyl compound.

Claim 6

The process of Claim 4, wherein said compound (A) (iii) contains N-alkylol groups and wherein said compound (B) is formaldehyde.

Claim 7

The process of Claim 4, wherein said compound (A) is selected from the group consisting of ureas, urethanes, thioureas, polycarboxylic polyamides, biurets, guanidines, melamines, arylamines, amidines, ammonia, hydrazines and hydra-zides.

Claim 8

The process of Claim 4, wherein said compound (A) is urea.

Claim 9

The process of Claim 7, wherein said compound (B) is formaldehyde.

Claim 10

The process of Claim 8, wherein said organic polyhydroxyl compound is a polyhydroxyl polyether with a molecular weight about 250 and about 4,000.

Claim 11

A storage stable dispersion of an aminoplast in an organic polyhydroxyl compound having a molecular weight of from about 250 to about 14,000, said dispersion having a solids content of from about 5 to about 45% by weight.

Claim 12

A storage stable dispersion of an aminoplast in an organic polyhydroxyl compound having a molecular weight of from about 250 to about 14,000, said dispersion having a solids content of from about 5 to about 45% by weight.

Claim 13

A process for preparing a dispersion of an aminoplast condensate in an organic polyhydroxyl compound, having a molecular weight of from about 250 to about 14,000, which comprises condensing urea with formaldehyde in the presence of a primary hydroxyl containing poly (propylene/ ethylene) oxide having a weight ratio of bound propylene oxide to bound ethylene oxide of 83:17, said poly (propylene/ethylene) oxide having a hydroxyl number of about 35, such that a storage stable aminoplast dispersion having a solids content of from about 5 to about 45% by weight is produced.

Claim 14

A process for preparing a dispersion of an aminoplast condensate in an organic polyhydroxyl compound, having a molecular weight of from about 250 to about 14,000, which comprises condensing urea with formaldehyde in the presence of a primary hydroxyl containing poly (propylene/ ethylene) oxide having a weight ratio of bound propylene oxide to bound ethylene oxide of 83:17, said poly (propylene/ethylene) oxide having a hydroxyl number of about 35, such that a storage stable aminoplast dispersion having a solids content of from about 5 to about 45% by weight is produced.

Claim 15

A process for preparing a dispersion of an aminoplast which comprises reacting a carbonyl compound with ammonia or a compound having -NH2 or -NH- groups and adapted to react with said carbonyl compound to form an aminoplast in an organic polyhydroxyl compound which is adapted to react with an organic polyisocyanate to form a polyurethane, wherein said carbonyl compound corresponds to the formula R-CO-R': in which R and R' stand for the same or different radicals selected from the group consisting of hydrogen, C1-C4 alkyl groups which may carry chlorine substituents, C2-C4-alkenyl groups C6-C10 aryl groups, C7-C10 aralkyl groups, C5-C10 cycloalkyl or semi-acetals obtained by reacting said compound of the formula R-CO-R' with monohydric or dihydric aliphatic alco-hols having one to ten carbon atoms, and wherein said organic polyhydroxyl compound has a molecular weight of from about 250 to 14,000, such that a storage stable aminoplast dis-persion having a solids content of from about 5 to about 45 by weight is produced.

Claim 16

A process for preparing a dispersion of an aminoplast which comprises reacting a carbonyl compound with ammonia or a compound having -NH2 or -NH- groups and adapted to react with said carbonyl compound to form an aminoplast in an organic polyhydroxyl compound which is adapted to react with an organic polyisocyanate to form a polyurethane, wherein said carbonyl compound corresponds to the formula R-CO-R': in which R and R' stand for the same or different radicals selected from the group consisting of hydrogen, C1-C4 alkyl groups which may carry chlorine substituents, C2-C4-alkenyl groups C6-C10 aryl groups, C7-C10 aralkyl groups, C5-C10 cycloalkyl or semi-acetals obtained by reacting said compound of the formula R-CO-R' with monohydric or dihydric aliphatic alco-hols having one to ten carbon atoms, and wherein said organic polyhydroxyl compound has a molecular weight of from about 250 to 14,000, such that a storage stable aminoplast dis-persion having a solids content of from about 5 to about 45 by weight is produced.

Claim 17

The process of Claim 12, wherein (a) the reactants which form the amino-plast are urea, formaldehyde, and .epsilon.-caprolactam and (b) the reactants are added to the organic polyhydroxyl compound as water is removed from the mixture, and the reaction mixture is thereafter neutralized with an alkali hydroxide whereby an aminoplast is dispersed in the said polyhydroxyl compound.