Amphoteric graft copolymers of xanthomonas hydrophilic colloid and partially N-aminomethylated acrylamide

Claim 2

Amphoteric graft copolymers of xanthomonas hydrophilic colloid and partially N-aminoalkylated acrylamide wherein the amidoalkylamino function has the formula: ##STR11## or the acid addition salts thereof of the formula: ##STR12## or the quaternary salts thereof of the formula: ##STR13## wherein R and R 1 are independently lower alkyl; R 2 is hydrogen, lower alkyl, or benzyl; R 3 is lower alkyl, or benzyl; and A.sup.⊖ is an anion of a strong acid, wherein the weight ratio of xanthomonas hydrophilic colloid to the acrylamide (ZN:AM) ranges between 1:1 to 1:10, and wherein the percentage of the amidoalkylamine function based on the total available acrylamide groups (NAM%) ranges 30-85%.

Claim 3

The acid addition salts of the copolymers of claim 1 wherein A.sup.⊖ is chloride, bromide or iodide.

Claim 4

The quaternary salts of the copolymers of claim 1 wherein R 3 is C 1-4 alkyl, and A.sup.⊖ is chloride, bromide or iodide.

Claim 5

The copolymers of claim 1 wherein the ZN:AM ranges between 1:1 to 1:5.

Claim 6

The copolymers of claim 1 wherein the ZN:AM ranges between 1:1 to 1:3.

Claim 7

The copolymers of claim 1 wherein the NAM% is 45% to 55%.

Claim 8

The copolymers of claim 1 wherein R and R 1 are independently C 1-3 alkyl and R 2 is hydrogen, methyl, or benzyl.

Claim 9

The copolymers of claim 1 wherein R and R 1 are both methyl and R 2 is hydrogen.

Claim 10

The acid addition salts of the copolymer of claim 8 wherein A.sup.⊖ is chloride, bromide or iodide.

Claim 11

The acid addition salt of the copolymers of claim 8 wherein A.sup.⊖ is chloride.

Claim 12

The quaternary salt of the copolymers of claim 8 wherein R 3 is C 1-4 alkyl, and A.sup.⊖ is chloride, bromide or iodide.

Claim 13

The quaternary salt of the copolymers of claim 8 wherein R 3 is methyl, A.sup.⊖ is chloride.

Claim 14

A process for preparation of grafted copolymers of xanthomonas hydrophilic colloid and partially N-aminoalkylated acrylamide wherein the N-aminoalkylated acrylamide function has the formula: ##STR14## comprising reacting a xanthomonas hydrophilic colloid-acrylamide graft copolymer wherein the weight ratio of xanthomonas hydrophilic colloid to acrylamide (ZN:AM) ranges between 1:1 to 1:10, with a dialkylamine of formula ##STR15## wherein R and R 1 are independently lower alkyl, and an aldehyde of formula: R.sup.2 CHO wherein R 2 is hydrogen or lower alkyl, in an inert solvent followed, if desired, by cationization with (1) an acid of formula HA to form an acid addition salt of partial formula ##STR16## wherein A.sup.⊖ is an anion of a strong acid, or (2) with an alkyl halide of formula R 3 A.sub.α to form a quaternary salt of partial formula ##STR17## wherein R 3 is lower alkyl or benzyl, and A - .sub.α is chloride, bromide or iodide, followed, if desired, by basification with a strong base to form a quaternary hydroxide of partial formula: ##STR18## followed by salt formation with a strong acid of formula HA to produce the quaternary salt of partial formula ##STR19##

Claim 15

A process for preparation of grafted copolymers of xanthomonas hydrophilic colloid and partially N-aminoalkylated acrylamide wherein the N-aminoalkylated acrylamide function has the formula: ##STR14## comprising reacting a xanthomonas hydrophilic colloid-acrylamide graft copolymer wherein the weight ratio of xanthomonas hydrophilic colloid to acrylamide (ZN:AM) ranges between 1:1 to 1:10, with a dialkylamine of formula ##STR15## wherein R and R 1 are independently lower alkyl, and an aldehyde of formula: R.sup.2 CHO wherein R 2 is hydrogen or lower alkyl, in an inert solvent followed, if desired, by cationization with (1) an acid of formula HA to form an acid addition salt of partial formula ##STR16## wherein A.sup.⊖ is an anion of a strong acid, or (2) with an alkyl halide of formula R 3 A.sub.α to form a quaternary salt of partial formula ##STR17## wherein R 3 is lower alkyl or benzyl, and A - .sub.α is chloride, bromide or iodide, followed, if desired, by basification with a strong base to form a quaternary hydroxide of partial formula: ##STR18## followed by salt formation with a strong acid of formula HA to produce the quaternary salt of partial formula ##STR19##