Process for preparation of amphoteric polyurethane emulsions

Claim 2

REACTING IN THE LIQUID PHASE AND IN A KETONE SOLVENT AT A TEMPERATURE OF FROM -20* TO +70*C (A) ISOCYANATE-TERMINATED URETHANE PREPOLYMER PREPARED BY REACTING ORGANIC POLYOL HAVING A MOLECULAR WEIGHT IN THE RANGE OF FROM 200 TO 10,000 WITH AN EXCESS OF ORGANIC POLYISOCYANATE WITH (B) AN EXCESS OF POLYALKYLENE POLYAMINE HAVING AT LEAST TWO PRIMARY OR SECONDARY AMINO GROUPS AND ALSO HAVVING A FUNCTIONAL GROUP OF THE FORMULA-CH2CH(OH)-CH2X WHEREIN X IS CHLORO OR BROMO THE TOTAL MOLE NUMBER OF PRIMARY AND SECONDARY AMINO GROUPS IN THE POLYALKYLENE POLYAMINE BEING GREATER THAN THE TOTAL MOLE NUMBER OF ISOCYANATE GROUPS IN THE ISOCYANATE TERMINATED URETHANE PREPOLYMER THE REACTION BEING CARRIED OUT UNTIL THE PRESENCE OF -NCO GROUPS GROUPS CANNOT BE DETECTED WHEREBY TO FORM POLYURETHANE UREA-POLYAMINE,

Claim 3

A PROCESS FOR PREPARING AN AMPHOTERIC POLYURETHANE EMULSION WHICH COMPRISES,

Claim 4

A PROCESS FOR PREPARING AN AMPHOTERIC POLYURETHANE EMULSION WHICH COMPRISES,

Claim 5

reacting, in the liquid phase the reaction product of step 1 with either a. a substance selected from the group consisting of sultones, lactones and sodium monohalogenated carboxylate, at a temperature of +40* to +70*C, for 3 to 7 hours, the amount of said substance being in the range of 0.5 to 2.0 moles per one mole of amino groups of the polyurethane-urea-polyamine and sufficient to render amphoteric the amino groups of the reaction product of step 1 so that a stable emulsion is formed when water is added and blended in the product of step 2(a), or b. a substance selected from the group consisting of alkyl acrylates, alkyl methacrylates and acrylonitrile, at a temperature of 50 to 80*C, for 3 to 7 hours and then hydrolyzing the reaction products, the amount of said substance in the range of 0.5 to 2.0 moles per the mole of amino groups of the polyurethane-urea-polyamine and being sufficient to render amphoteric the amino group of the reaction product of step 1 so that a stable emulsion can be formed when water is added and blended in the product of step 2(b),

Claim 6

reacting, in the liquid phase the reaction product of step 1 with either a. a substance selected from the group consisting of sultones, lactones and sodium monohalogenated carboxylate, at a temperature of +40* to +70*C, for 3 to 7 hours, the amount of said substance being in the range of 0.5 to 2.0 moles per one mole of amino groups of the polyurethane-urea-polyamine and sufficient to render amphoteric the amino groups of the reaction product of step 1 so that a stable emulsion is formed when water is added and blended in the product of step 2(a), or b. a substance selected from the group consisting of alkyl acrylates, alkyl methacrylates and acrylonitrile, at a temperature of 50 to 80*C, for 3 to 7 hours and then hydrolyzing the reaction products, the amount of said substance in the range of 0.5 to 2.0 moles per the mole of amino groups of the polyurethane-urea-polyamine and being sufficient to render amphoteric the amino group of the reaction product of step 1 so that a stable emulsion can be formed when water is added and blended in the product of step 2(b),

Claim 7

REACTING IN THE LIQUID PHASE THE REACTION PRODUCT OF STEP 1 WITH EITHER A. A SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF SULTONES LACTONES AND SODIUM MONOHALOGENATED CARBOXYLATE AT A TEMPERATURE OF 40% TO +70*C FOR 3 TO 7 HOURS THE AMOUNT OF SAID SUBSTANCE BEING IN THE RANGE OF 0.5 TO 2.0 MOLES PER ONE OF AMINO GROUP OF THE POLYURETHANE UREA-POLYAMINE AND SUFFICIENT TO RENDER AMPHOTERIC THE AMINO GROUPS OF THE REACTION PRODUCT OF STEP 1 SO THAT A STABLE EMULSION IS FORMED WHEN WATER IS ADDED AND BLENDED IN THE PRODUCT OF STEP 2(A) OR B. A SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF ALKYL ACRYLATES ALKYL METHACRYLATES AND ACRYLONITRILE AT A TEMPERATURE OF 50 TO 80*C FOR 3 TO 7 HOURS AND THEN HYDROLYZING THE REACTION PRODUCTS THE AMOUNT OF SAID SUBSTANCE IN THE RANGE OF 0.5 TO 2.0 MOLES PER THE MOLE OF AMINO GROUPS OF THE POLYURETHANE UREA-POLYAMINE AND BEING SUFFICIENT TO RENDER AMPHOTERIC THE AMINO GROUP OF THE REACTION PRODUCT OF STEP 1 SO THAT A STABLE EMULSION CAN BE FORMED WHEN WATER IS ADDED AND BLENDED IN THE PRODUCT OF STEP 2(B).

Claim 8

REACTING IN THE LIQUID PHASE THE REACTION PRODUCT OF STEP 1 WITH EITHER A. A SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF SULTONES LACTONES AND SODIUM MONOHALOGENATED CARBOXYLATE AT A TEMPERATURE OF 40% TO +70*C FOR 3 TO 7 HOURS THE AMOUNT OF SAID SUBSTANCE BEING IN THE RANGE OF 0.5 TO 2.0 MOLES PER ONE OF AMINO GROUP OF THE POLYURETHANE UREA-POLYAMINE AND SUFFICIENT TO RENDER AMPHOTERIC THE AMINO GROUPS OF THE REACTION PRODUCT OF STEP 1 SO THAT A STABLE EMULSION IS FORMED WHEN WATER IS ADDED AND BLENDED IN THE PRODUCT OF STEP 2(A) OR B. A SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF ALKYL ACRYLATES ALKYL METHACRYLATES AND ACRYLONITRILE AT A TEMPERATURE OF 50 TO 80*C FOR 3 TO 7 HOURS AND THEN HYDROLYZING THE REACTION PRODUCTS THE AMOUNT OF SAID SUBSTANCE IN THE RANGE OF 0.5 TO 2.0 MOLES PER THE MOLE OF AMINO GROUPS OF THE POLYURETHANE UREA-POLYAMINE AND BEING SUFFICIENT TO RENDER AMPHOTERIC THE AMINO GROUP OF THE REACTION PRODUCT OF STEP 1 SO THAT A STABLE EMULSION CAN BE FORMED WHEN WATER IS ADDED AND BLENDED IN THE PRODUCT OF STEP 2(B).

Claim 9

A process according to claim 1, in which the reactant (B) includes up to 50 percent, by molecular equivalent, of diamines of alkylene oxide adducts, acrylonitrile adducts or acrylate adducts of diamines.

Claim 10

A process according to claim 1, in which the ratio of (b) the total mole number of amino groups containing active hydrogen atoms in the polyalkylene polyamine, to (a) the total mole number of isocyanate groups in said urethane prepolymer is in the range of 1 < b < or = 5/a.

Claim 11

TREATING THE PRODUCT OF STEP 2 TO REMOVE THE ORGANIC SOLVENT THEREFROM AND ADDING WATER THERETO AND THEREBY OBTAINING AN AQUEOUS AMPHOTERIC POLYURETHANE EMULSION AS A FINAL PRODUCT.

Claim 12

TREATING THE PRODUCT OF STEP 2 TO REMOVE THE ORGANIC SOLVENT THEREFROM AND ADDING WATER THERETO AND THEREBY OBTAINING AN AQUEOUS AMPHOTERIC POLYURETHANE EMULSION AS A FINAL PRODUCT.

Claim 13

treating the product of step 2 to remove the organic solvent therefrom and adding water thereto and thereby obtaining an aqueous amphoteric polyurethane emulsion as a final product.

Claim 14

treating the product of step 2 to remove the organic solvent therefrom and adding water thereto and thereby obtaining an aqueous amphoteric polyurethane emulsion as a final product.

Claim 15

A process according to claim 1, in which the polyalkylene polyamine has the formula

Claim 16

A process according to claim 4, in which said polyalkylene polyamine is prepared by reacting, at from 10* to 80*C, for from 0.5 to 5 hours, epichlorohydrin epibromohydrin with a polyamine having the formula

Claim 17

A process according to claim 1, in which the step 2(a) said substance is selected from the group consisting of 1,3-propanesultone, 1,4-butanesultone, Beta -propiolactone, gamma -butyrolactone, epsilon -caprolactone, delta -valerolactone and X(CH2)nCOONa, in which X is halogen and n is an integer of 1 or 2.

Claim 18

A process according to claim 1, in which in step 2(b) said substance is selected from the group consisting of methyl acrylate, ethyl acrylate, methyl methacrylate, ethyl methacrylate and acrylonitrile.

Claim 19

An aqueous amphoteric polyurethane emulsion prepared by the process of claim 1.

Claim 20

A polyurethane molded product prepared by forming the emulsion of claim 8 into a molded product and then heat-treating the product to effect cross-linking.