US4220749A — Process for the production of modified polyisocya…

Claim 1

Independent Claim 82 words

A process for the production of modified organic polyisocyanates containing triuret or higher polyuret groups, wherein secondary monoamines are reacted with excess quantities of organic diisocyanates with formation of triuret or higher polyuret groups and with incorporation into the resulting product of the residue of the amine which is inert with respect to the reaction, the reaction being conducted in the presence of a proton-eliminating acid catalyst which is capable of reacting with isocyanate groups to form a mixed carbamic acid anhydride.

Claim 2

Dependent Claim 82 words

A process for the production of modified organic polyisocyanates containing triuret or higher polyuret groups, wherein secondary monoamines are reacted with excess quantities of organic diisocyanates with formation of triuret or higher polyuret groups and with incorporation into the resulting product of the residue of the amine which is inert with respect to the reaction, the reaction being conducted in the presence of a proton-eliminating acid catalyst which is capable of reacting with isocyanate groups to form a mixed carbamic acid anhydride.

Claim 3

Dependent Claim 20 words

A process as claimed in claim 1, wherein aliphatic or cycloaliphatic monoamines or mixtures thereof are used as the monoamines.

Claim 4

Dependent Claim 19 words

A process as claimed in claims 1 or 2, wherein aliphatic and/or cycloaliphatic diisocyanates are used as organic diisocyanates.

Claim 5

Dependent Claim 40 words

A modification of the process claimed in claim 1, wherein, instead of the monoamines, reaction products of the monoamines and organic diisocyanates containing urea and/or biuret groups and the amine residue inert to the reaction with organic diisocyanates are used.

Claim 6

Dependent Claim 118 words

Compounds corresponding to the following general formula: ##STR3## wherein R 1 and R 2 , which may be the same or different, each represents an aliphatic hydrocarbon radical containing from 1 to 20 carbon atoms or a cycloaliphatic hydrocarbon radical containing from 4 to 20 carbon atoms, or the two radicals together with the nitrogen atom may form a 5- or 6-membered heterocyclic ring optionally containing further hetero atoms selected from the group consisting of nitrogen sulfur and oxygen; R 3 and R 4 , which may be the same or different, each represents an aliphatic or cycloaliphatic hydrocarbon radical containing from 4 to 20 carbon atoms; and n represents a number of from about 2 to 8.

Claim 7

Dependent Claim 118 words

Compounds corresponding to the following general formula: ##STR3## wherein R 1 and R 2 , which may be the same or different, each represents an aliphatic hydrocarbon radical containing from 1 to 20 carbon atoms or a cycloaliphatic hydrocarbon radical containing from 4 to 20 carbon atoms, or the two radicals together with the nitrogen atom may form a 5- or 6-membered heterocyclic ring optionally containing further hetero atoms selected from the group consisting of nitrogen sulfur and oxygen; R 3 and R 4 , which may be the same or different, each represents an aliphatic or cycloaliphatic hydrocarbon radical containing from 4 to 20 carbon atoms; and n represents a number of from about 2 to 8.

Claim 8

Dependent Claim 67 words

Compounds corresponding to the formula in claim 5 wherein R 1 and R 2 , which may be the same or different, each represents an aliphatic hydrocarbon radical containing from 1 to 4 carbon atoms or, together with the nitrogen atom, form a piperidine ring; R 3 and R 4 , each represents a hexamethylene radical; and n represents a number of from about 2 to 8.

Claim 9

Dependent Claim 31 words

In a process for the production of polyurethane plastics by the isocyanate-polyaddition process, the improvement comprising reacting modified organic polyisocyanates produced by the process of claim 1 with active hydrogen-containing compounds.

Claim 10

Dependent Claim 16 words

The compounds of claim 5 wherein the NCO-content is from about 10 to 22% by weight.

Claim 11

Dependent Claim 92 words

A process for the production of modified organic polyisocyanates containing triuret or higher polyuret groups comprising reacting: (a) compounds selected from the group consisting of secondary monoamines and reaction products of secondary monoamines and organic diisocyanates containing urea or biuret groups, and (b) excess organic diisocyanate in the presence of a proton-eliminating acid catalyst which is capable of reacting with isocyanate groups to form a mixed carbamic acid anhydride, wherein the residues of said monoamines which are inert with respect to said process are incorporated into the resulting product of said process.

Claim 12

Dependent Claim 92 words

A process for the production of modified organic polyisocyanates containing triuret or higher polyuret groups comprising reacting: (a) compounds selected from the group consisting of secondary monoamines and reaction products of secondary monoamines and organic diisocyanates containing urea or biuret groups, and (b) excess organic diisocyanate in the presence of a proton-eliminating acid catalyst which is capable of reacting with isocyanate groups to form a mixed carbamic acid anhydride, wherein the residues of said monoamines which are inert with respect to said process are incorporated into the resulting product of said process.

Claim 13

Dependent Claim 12 words

The process of claim 9 wherein component (a) is a secondary monoamine.

Claim 14

Dependent Claim 23 words

The process of claim 10 wherein components (a) and (b) are present in an NCO/NH molar ratio of from about 5.5:1 to 100:1.

Claim 15

Dependent Claim 28 words

The process of claim 9 wherein the proton-eliminating acid catalyst is present in from about 0.001 to 10% by weight, based on the total weight of the reactants.

Claim 16

Dependent Claim 32 words

The process of claim 9 wherein the proton-eliminating acid catalyst is present in the form of a mixed carbamic acid anhydride, the corresponding ammonium salt of the proton-eliminating acid or mixtures thereof.

Claim 17

Dependent Claim 85 words

A process for the production of modified organic polyisocyanates containing triuret or higher polyuret groups comprising reacting compounds selected from the group consisting of secondary amines and reaction products of secondary amines and organic diisocyanates containing urea or biuret groups, with excess organic diisocyanate in the presence of a proton-eliminating acid catalyst which is capable of reacting with isocyanate groups to form a mixed carbamic acid anhydride, said excess organic diisocyanate being sufficient to provide an NCO/NH molar ratio of from about 5.5:1 to 100:1.

Claim 18

Dependent Claim 85 words

A process for the production of modified organic polyisocyanates containing triuret or higher polyuret groups comprising reacting compounds selected from the group consisting of secondary amines and reaction products of secondary amines and organic diisocyanates containing urea or biuret groups, with excess organic diisocyanate in the presence of a proton-eliminating acid catalyst which is capable of reacting with isocyanate groups to form a mixed carbamic acid anhydride, said excess organic diisocyanate being sufficient to provide an NCO/NH molar ratio of from about 5.5:1 to 100:1.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1983-09-02	1984-03-03	1984-09-02	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1987-09-02	1988-03-03	1988-09-02	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1991-09-02	1992-03-03	1992-09-02	$7700.00	Window Closed / Lapsed

Process for the production of modified polyisocyanates

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