Pulp slurry drainage improver

Claim 2

A pulp slurry drainage improver comprising a poly-monoallylamine resin represented by the following formula: wherein X is Cl, Br, I, HSO 4 , HSO 3 , H 2 P0 4 , H 2 PO 3 , HCOO, CH 3 COO or C 2 H 5 COO, n is a number of 10 to 100,000, and m is a number of 0 to 100,000, or a modified resin of the poly-monoallylamine resin.

Claim 3

A drainage improver according to Claim 1, wherein the poly-monoallylamine resin or the modified resin of the poly-monoallylamine resin is selected from the group consisting of: homopolymers (A) of inorganic acid salts of monoallylamine obtained by polymerizing inorganic acid salts of monoallylamine, homopolymers (A') of monoallylamine obtained by removing inorganic acids from said polymers (A), or homopolymers (A") of organic acid salts of monoallylamine obtained by neutralizing said polymers (A') with an organic acid such as formic acid, acetic acid, propionic acid, p-toluenesulfonic acid or the like; copolymers (B) obtained by copolymerizing inorganic acid salts of monoallylamine with a small quantity of polymerizable monomer containing two or more double bonds in the molecule, said copolymers (B) being soluble in water and identical with said polymers (A) in the properties other than those relating to molecular weight; and modified polymers (C) obtained by reacting the compounds containing two or more groups reactable with amino groups in the molecule with said polymers (A), (A'), (A") or (B), said modified polymers (C) being soluble in water and identical with said polymers (A), (A'), (A") and (B) in the properties other than those relating to molecular weight.

Claim 4

A drainage improver according to Claim 2, wherein the copolymers (B) are the copolymers of inorganic acid salts of monoallylamine and a small quantity of inorganic acid salts of triallylamine.

Claim 5

A drainage improver according to Claim 2, wherein the modified polymers (C) are the reaction products of the polymers (A), (A'), (A") or (B) with epichlorohydrin.

Claim 6

A pulp slurry drainage improving method . characterized by adding to pulp slurry a poly-monoallylamine resin represented by the following formula: wherein X is Cl, Br, I, HS0 4 , HS03, H 2 PO 4 , H 2 P0 3 , H COO, CH 3 COO or C 2 H S COO, n is a number of 10 to 100,000, and m is a number of 0 to 100,000, or a modified resin of the poly-monoallylamine resin.

Claim 7

A pulp slurry drainage improving method . characterized by adding to pulp slurry a poly-monoallylamine resin represented by the following formula: wherein X is Cl, Br, I, HS0 4 , HS03, H 2 PO 4 , H 2 P0 3 , H COO, CH 3 COO or C 2 H S COO, n is a number of 10 to 100,000, and m is a number of 0 to 100,000, or a modified resin of the poly-monoallylamine resin.

Claim 8

A pulp slurry drainage improving method according to Claim 5, wherein the amount of the poly-monoallylamine resin is 0.005 to 1.0% by weight, preferably 0.01 to 0.5% by weight, based on the content of pulp fiber material.