Polyamide-polyurea polymers by the RIM process

Claim 2

A polyamide-polyurea containing polymer comprising the product of reaction injection molding of, A. an organic polyisocyanate; B. an organic compound having at least two active hydrogen containing groups and a M.W. of about 1500 to about 12,000; and C. from about 15 to about 160 parts per 100 parts of said (B) of a chain extender combination comprising (i) an enamine having the formula ##STR3## wherein C n H 2n represents alkylene having 3 carbon atoms in succession in the chain R 1 and R 2 when taken separately are independently selected from the group consisting of lower-alkyl, aralkyl, cycloalkyl, and, when taken together with the nitrogen atom to which they are attached, represent a heterocyclic group having from 5 to 7 ring atoms, (ii) an aromatic diamine having a M.W. of about 108 to about 400 wherein (i) and (ii) are present in the proportions by weight based on their combined weight of about 5 to about 45 percent and 95 to 55 percent respectively and optionally, (iii) about 5 to about 50 percent by weight of the total weight of (i), (ii), and (iii) of an extender diol of M.W. of about 60 to about 400; wherein the ratio of equivalents of said polyisocyanate to total equivalents of (B) and (C) is within the range of about 0.90:1 to 1.10:1.

Claim 3

A polyamide-polyurea containing polymer according to claim 1 wherein said polyisocyanate is selected from the group consisting of (a) an isocyanate terminated prepolymer having an isocyanate content of about 9 to about 20 percent by weight and prepared from methylenebis(phenyl isocyanate); (b) a liquefied form of 4,4'-methylenebis(phenyl isocyanate), and mixtures of (a) and (b).

Claim 4

A polyamide-polyurea containing polymer according to claim 1 wherein said organic compound (B) comprises a polyol having a primary hydroxyl functionality of from about 2 to about 4.

Claim 5

A polyamide-polyurea containing polymer according to claim 1 wherein said organic compound (B) comprises a primary or secondary amine terminated polyether having an amine functionality of about 2 to about 4.

Claim 6

A polyamide-polyurea containing polymer according to claim 1 wherein C n H 2n in said enamine (i) represents the 1,3-propylene radical.

Claim 7

A polyamide-polyurea containing polymer according to claim 1 wherein R 1 and R 2 in said enamine each represent lower-alkyl.

Claim 8

A polyamide-polyurea containing polymer according to claim 1 wherein R 1 and R 2 in said enamine, taken together with the nitrogen atom to which they are attached represent a heterocyclic group having from 5 to 7 ring atoms.

Claim 9

A polyamide-polyurea containing polymer according to claim 1 wherein said enamine is 1-(dibutylamino)cyclohexene-1.

Claim 10

A polyamide-polyurea containing polymer according to claim 1 wherein said enamine is 1-(N-piperidinyl)cyclohexene-1.

Claim 11

A polyamide-polyurea containing polymer according to claim 1 wherein said aromatic diamine (ii) is selected from the group consisting of 1-methyl-3,5-diethyl-2,4-diaminobenzene, 1-methyl-3,5-diethyl-2,6-diaminobenzene, and mixtures thereof.

Claim 12

A polyamide-polyurea containing polymer according to claim 1 wherein an extender diol is present in about 5 to about 50 percent by weight of the total weight of the extender combination of (i), (ii), and (iii).

Claim 13

A polyamide-polyurea containing polymer according to claim 11 wherein said extender diol comprises ethylene glycol.

Claim 14

A polyamide-polyurea containing polymer prepared by reacting components A., B., and C. of claim 1 in the presence of a polyurethane catalyst.

Claim 15

A polyamide-polyurea containing polymer comprising the product of reaction injection molding of A. a polyisocyanate selected from the group consisting of (a) an isocyanate terminated prepolymer having an isocyanate content of about 9 to about 20 percent by weight, and prepared from methylenebis(phenyl isocyanate), (b) a liquefied form of 4,4'-methylenebis(phenyl isocyanate), and mixtures of (a) and (b); B. an organic polyol or polyamine having a M.W. of from about 1500 to about 12,000 and selected from the group consisting of polyols having a primary hydroxyl functionality of from about 2 to about 4, a primary or secondary amine terminated polyether having an amine functionality of about 2 to about 4, and mixtures of said polyol and polyamine; and C. from about 15 to about 160 parts per 100 parts of said (B) of a chain extender combination comprising (i) an enamine having the formula ##STR4## wherein R 1 and R 2 are each lower-alkyl, (ii) an aromatic diamine selected from the group consisting of 1-methyl-3,5-diethyl-2,4-diaminobenzene, 1-methyl-3,5-diethyl-2,6-diaminobenzene, and mixtures thereof wherein (i) and (ii) are present in the proportions by weight based on their combined weight of about 5 to about 45 percent and 95 to 55 percent, respectively, and optionally, (iii) about 5 to about 50 percent by weight of the total weight of (i), (ii), and (iii) of an extender diol of M.W. of about 60 to about 400; and optionally D. a polyurethane catalyst wherein the ratio of equivalents of said polyisocyanate to total equivalents of (B) and (C) is within the range of about 0.90:1 to 1.10:1.

Claim 16

A polyamide-polyurea containing polymer comprising the product of reaction injection molding of A. a polyisocyanate selected from the group consisting of (a) an isocyanate terminated prepolymer having an isocyanate content of about 9 to about 20 percent by weight, and prepared from methylenebis(phenyl isocyanate), (b) a liquefied form of 4,4'-methylenebis(phenyl isocyanate), and mixtures of (a) and (b); B. an organic polyol or polyamine having a M.W. of from about 1500 to about 12,000 and selected from the group consisting of polyols having a primary hydroxyl functionality of from about 2 to about 4, a primary or secondary amine terminated polyether having an amine functionality of about 2 to about 4, and mixtures of said polyol and polyamine; and C. from about 15 to about 160 parts per 100 parts of said (B) of a chain extender combination comprising (i) an enamine having the formula ##STR4## wherein R 1 and R 2 are each lower-alkyl, (ii) an aromatic diamine selected from the group consisting of 1-methyl-3,5-diethyl-2,4-diaminobenzene, 1-methyl-3,5-diethyl-2,6-diaminobenzene, and mixtures thereof wherein (i) and (ii) are present in the proportions by weight based on their combined weight of about 5 to about 45 percent and 95 to 55 percent, respectively, and optionally, (iii) about 5 to about 50 percent by weight of the total weight of (i), (ii), and (iii) of an extender diol of M.W. of about 60 to about 400; and optionally D. a polyurethane catalyst wherein the ratio of equivalents of said polyisocyanate to total equivalents of (B) and (C) is within the range of about 0.90:1 to 1.10:1.

Claim 17

A polyamide-polyurea containing polymer according to claim 14 wherein said (B) comprises a polyol having a primary hydroxyl functionality of about 2 to about 3 and M.W. from about 2000 to about 8000.

Claim 18

A polyamide-polyurea containing polymer according to claim 14 wherein said (B) comprises a primary amine terminated polyether having an amine functionality of about 2 to about 3 and M.W. from about 2000 to about 6000.

Claim 19

A polyamide-polyurea containing polymer according to claim 14 wherein said enamine comprises 1-(dibutylamino)cyclohexene-1.

Claim 20

A polyamide-polyurea-polyurethane polymer according to claim 17 wherein said (A) comprises a liquefied form of 4,4'-methylenebis(phenyl isocyanate), said (B) comprises a polyoxyethylene-polyoxypropylene triol of M.W. of about 2000 to about 8000 and a polyurethane catalyst is employed.

Claim 21

A polyamide-polyurea-polyurethane polymer according to claim 17 wherein said (A) comprises a mixture of a liquefied form of 4,4'-methylenebis(phenyl isocyanate) and an isocyanate terminated prepolymer having an isocyanate content of about 9 to about 20 percent by weight and prepared from methylenebis(phenyl isocyanate), said (B) comprises a polyoxyethylene-polyoxypropylene triol of M.W. of about 2000 to about 8000, and a polyurethane catalyst is employed.

Claim 22

A polyamide-polyurea-polyurethane polymer according to claim 19 wherein said (C) comprises about 5 to about 50 percent by weight based on the total weight of (i), (ii), and (iii) of ethylene glycol, and a polyurethane catalyst is employed.

Claim 23

A polyamide-polyurea polymer according to claim 17 wherein said (A) comprises a mixture of a liquefied form of 4,4'-methylenebis(phenyl isocyanate) and an isocyanate terminated prepolymer having an isocyanate content of about 9 to about 20 percent by weight and prepared from methylenebis(phenyl isocyanate) and said (B) comprises a primary amine terminated polyether having an amine functionality of about 3 and M.W. of about 2000 to 6000.