US4237264A — Process for the preparation of polyurethanes whic…

Claim 1

Independent Claim 188 words

A process for the preparation of water dispersible, substantially linear polyurethanes characterized by a content of from 0.5 to 10%, by weight, of ethylene oxide units built into terminal polyether chains and from 0.1 to 15 milliequivalents of ionic groups per 100 grams of polyurethane, said process comprising reacting: (a) an organic diisocyanate, (b) an organic compound, which behaves as a difunctional material in the reaction with the diisocyanate and which contains isocyanate reactive hydrogen atoms, (c) a first hydrophilic material selected from the group consisting of (i) monoisocyanates which contain hydrophilic chains containing ethylene oxide (i.e., --CH 2 --CH 2 --O--) units, (ii) compounds which are monofunctional in the isocyanate polyaddition reaction, which contain isocyanate reactive hydrogen atoms, and which contain ethylene oxide units, and (iii) mixtures thereof, and (d) a second hydrophilic material selected from the group consisting of (i) mono- and/or diisocyanates which contain ionic groups and/or groups capable of conversion into ionic groups, (ii) compounds which are mono- and/or difunctional in the isocyanate polyaddition reaction, which contain isocyanate reactive hydrogen atoms and which contain ionic groups and/or groups capable of conversion into ionic groups.

Claim 2

Dependent Claim 188 words

A process for the preparation of water dispersible, substantially linear polyurethanes characterized by a content of from 0.5 to 10%, by weight, of ethylene oxide units built into terminal polyether chains and from 0.1 to 15 milliequivalents of ionic groups per 100 grams of polyurethane, said process comprising reacting: (a) an organic diisocyanate, (b) an organic compound, which behaves as a difunctional material in the reaction with the diisocyanate and which contains isocyanate reactive hydrogen atoms, (c) a first hydrophilic material selected from the group consisting of (i) monoisocyanates which contain hydrophilic chains containing ethylene oxide (i.e., --CH 2 --CH 2 --O--) units, (ii) compounds which are monofunctional in the isocyanate polyaddition reaction, which contain isocyanate reactive hydrogen atoms, and which contain ethylene oxide units, and (iii) mixtures thereof, and (d) a second hydrophilic material selected from the group consisting of (i) mono- and/or diisocyanates which contain ionic groups and/or groups capable of conversion into ionic groups, (ii) compounds which are mono- and/or difunctional in the isocyanate polyaddition reaction, which contain isocyanate reactive hydrogen atoms and which contain ionic groups and/or groups capable of conversion into ionic groups.

Claim 3

Dependent Claim 30 words

The process of claim 1 wherein component (d) contains ionizable groups and wherein said ionizable groups are converted to ionic groups during or after the reaction of the polyurethane components.

Claim 4

Dependent Claim 34 words

The process of claim 1 wherein component (b) is a compound having a molecular weight selected from the group consisting of (i) from 300 to 6000, (ii) less than 300, and (iii) mixtures thereof.

Claim 5

Dependent Claim 86 words

The process of claim 3, wherein component (c) is a compound of the formula: H--Y'--X--Y--R' wherein X represents the divalent radical obtained by removal of terminal oxygen atom from a polyalkylene oxide group having from 5 to 90 alkylene oxide units, at least 40% of which are ethylene oxide units, Y and Y' represent oxygen or --NR"--, where R" corresponds to R', or, in the case of Y', R" can be hydrogen, and R' represents a monovalent hydrocarbon group containing from 1 to 12 carbon atoms.

Claim 6

Dependent Claim 22 words

The process of claim 4, wherein the balance of the alkylene oxide units are propylene oxide, butylene oxide or styrene oxide units.

Claim 7

Dependent Claim 36 words

The process of claim 5 wherein component (d) is selected from the group consisting of (i) diols containing sulfonate groups and aliphatically bound hydroxyl groups, and (ii) diamines having aliphatically bound primary and/or secondary amino groups.

Claim 8

Dependent Claim 37 words

The process of claim 1 wherein said polyurethane contains from 2 to 8 percent, by weight, of ethylene oxide units and from 0.4 to 12 milliequivalents of ═N═.sup.⊕,═S--.sup.⊕ --COO.sup.⊖ or --SO 3 .sup.⊖ groups per 100 grams.

Claim 9

Dependent Claim 21 words

The process of claim 1 wherein the ratio of total isocyanate groups to total isocyanate-reactive groups is from 0.8:1 to 2.5:1.

Claim 10

Dependent Claim 56 words

Polyurethanes having a substantially linear molecular structure and being dispersible in water, characterized by (a) polyalkylene oxide polyether end chains containing from 0.5 to 10%, by weight, of ethylene oxide units based on the total quantity of polyurethane, and (b) from 0.1 to 15 milliequivalents of ═N═.sup.⊕, ═S--.sup.⊕,--COO.sup.⊖ or --SO 3 .sup.⊖ groups per 100 grams.

Claim 11

Dependent Claim 56 words

Polyurethanes having a substantially linear molecular structure and being dispersible in water, characterized by (a) polyalkylene oxide polyether end chains containing from 0.5 to 10%, by weight, of ethylene oxide units based on the total quantity of polyurethane, and (b) from 0.1 to 15 milliequivalents of ═N═.sup.⊕, ═S--.sup.⊕,--COO.sup.⊖ or --SO 3 .sup.⊖ groups per 100 grams.

Claim 12

Dependent Claim 9 words

The aqueous dispersion of the polyurethane of claim 9.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1983-12-02	1984-06-02	1984-12-02	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1987-12-02	1988-06-02	1988-12-02	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1991-12-02	1992-06-02	1992-12-02	$7700.00	Window Closed / Lapsed

Process for the preparation of polyurethanes which are dispersible in water

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