Rapid setting polyurethanes from diols and polyfunctional isocyanates

Claim 2

A rigid, non-cellular composition having a denisty of at least about 1 gram/cc which is demoldable, without the application of an external source of heat, within about 5 minutes after admixture of the components of the composition which is the reaction product of a polyurethane-forming composition comprising A. a dihydroxyl-containing compound having a hydroxyl equivalent weight of less than about 250; B. an organic polyisocyanate having an NCO functionality of at least about 2.5; C. a liquid modifier compound having a boiling point of at least about 150° C or mixture of such compounds and which moderates the reaction exotherm between components (A), (B) and (D) without substantial reaction therewith selected from the group consisting of organic phosphates, organic phosphites, organic phosphonates and mixtures thereof; and D. an organometallic catalyst; wherein components (A) and (B) are present in quantities such that the NCO:OH ratio is from about 0.8:1 to about 1.5:1, component (C) is present in quantities of from about 10 to about 50 percent by weight of the combined weights of components (A), (B) and (C); and component (D) is present in quantities of from about 0.1 to about 10 percent by weight of the combined weight of components (A), (B) and (C).

Claim 3

The composition of claim 1 wherein component (D) is employed in quantities of from about 0.1 to about 2.0 percent by weight of the combined weight of components (A), (B) and (C) and the NCO:OH ratio is from about 0.9:1 to about 1.2:1.

Claim 4

The composition of claim 2 wherein component (C) is employed in a quantity of from about 20 to about 40 percent by weight of the combined weight of components (A), (B) and (C) and component (D) is an organotin, organoantimony, or an organolead compound.

Claim 5

The composition of claim 3 wherein component (C) is an organic phosphate.

Claim 6

The composition of claim 4 wherein component (C) is tricresyl phosphate, triethyl phosphate, or β-chloroethyl phosphate.

Claim 7

The composition of claim 3 wherein component (C) is an organic phosphite.

Claim 8

The composition of claim 6 wherein component (C) is tributyl phosphite.

Claim 9

The composition of claim 3 wherein component (C) is an organic phosphonate.

Claim 10

The composition of claim 8 wherein component (C) is bis(2-bromopropyl)2-bromopropane phosphonate.

Claim 11

The composition of claim 1 cast as a furniture component.

Claim 12

The composition of claim 1 cast as a decorative object.

Claim 13

The composition of claim 1 cast as a machine component.

Claim 14

A process for producing solid, rigid, polyurethane articles having a density of at least 1 g/cc, a percent elongation of less than 100, and which can be demolded within a period of about 5 minutes without the addition of an external source of heat which process comprises: 1. admixing the components of a composition comprising A. a dihydroxyl-containing compound having a hydroxyl equivalent weight of less than about 250; B. an organic polyisocyanate having an NCO functionality of at least about 2.5; C. a liquid modifier compound having a boiling point of at least about 150° C or mixture of such compounds and which moderates the reaction exotherm between components (A), (B) and (D) without substantial reaction therewith selected from the group consisting of organic phosphates, organic phosphites, organic phosphonate and mixtures thereof; and D. an organometallic catalyst; wherein components (A) and (B) are present in quantities such that the NCO:OH ratio is from about 0.8:1 to about 1.5:1, component (C) is present in quantities of from about 10 to about 50 percent by weight of the combined weights of components (A), (B) and (C); and component (D) is present in quantities of from about 0.1 to about 10 percent by weight of the combined weight of components (A), (B) and (C); 2. placing the admixed composition into a suitable mold wherein said composition solidifies within less than about 5 minutes to a solid having the aforesaid density and elongation; and 3. subsequently demolding the resultant article from the mold.

Claim 15

A process for producing solid, rigid, polyurethane articles having a density of at least 1 g/cc, a percent elongation of less than 100, and which can be demolded within a period of about 5 minutes without the addition of an external source of heat which process comprises: 1. admixing the components of a composition comprising A. a dihydroxyl-containing compound having a hydroxyl equivalent weight of less than about 250; B. an organic polyisocyanate having an NCO functionality of at least about 2.5; C. a liquid modifier compound having a boiling point of at least about 150° C or mixture of such compounds and which moderates the reaction exotherm between components (A), (B) and (D) without substantial reaction therewith selected from the group consisting of organic phosphates, organic phosphites, organic phosphonate and mixtures thereof; and D. an organometallic catalyst; wherein components (A) and (B) are present in quantities such that the NCO:OH ratio is from about 0.8:1 to about 1.5:1, component (C) is present in quantities of from about 10 to about 50 percent by weight of the combined weights of components (A), (B) and (C); and component (D) is present in quantities of from about 0.1 to about 10 percent by weight of the combined weight of components (A), (B) and (C); 2. placing the admixed composition into a suitable mold wherein said composition solidifies within less than about 5 minutes to a solid having the aforesaid density and elongation; and 3. subsequently demolding the resultant article from the mold.

Claim 16

The process of claim 13 wherein component (D) is employed in quantities of from about 0.1 to about 2.0 percent by weight of the combined weight of components (A), (B) and (C) and the NCO:OH ratio is from about 0.9:1 to about 1.2:1.

Claim 17

The process of claim 14 wherein component (C) is employed in a quantity of from about 20 to about 40 percent by weight of the combined weight of components (A), (B) and (C) and component (D) is an organotin, organoantimony, or an organolead compound.

Claim 18

The process of claim 15 wherein component (C) is an organic phosphate.

Claim 19

The process of claim 16 wherein component (C) is tricresyl phosphate, triethyl phosphate, or β-chloroethyl phosphate.

Claim 20

The process of claim 15 wherein component (C) is an organic phosphite.

Claim 21

The process of claim 18 wherein component (C) is tributyl phosphite.

Claim 22

The process of claim 15 wherein component (C) is an organic phosphonate.

Claim 23

The process of claim 20 wherein component (C) is bis(2-bromopropyl)2-bromopropane phosphonate.

Claim 24

The process of claim 13 wherein said mold is that of a furniture component.

Claim 25

The process of claim 13 wherein said mold is that of a decorative object.

Claim 26

The process of claim 13 wherein said mold is that of a machine component.