Method of manufacturing aqueous fortified rosin dispersion
AssigneeHarima Chemicals, Inc.
InventorsYasutaka Nishi, Masao Hamada, Yoshihide Ishikawa, Setsuo Inoue
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Abstract
A method of manufacturing an aqueous O/W dispersion of fortified rosin for use in the sizing of paper by mixing the same with water and a dispersing agent by first forming a dispersion of the W/O type in the presence of the dispersing agent and then turning the first dispersion to an O/W type by sequential addition of water thereto, wherein said dispersing agent has the general formula: ##STR1## in which R is a straight- or branched-chain alkyl group having 4 to 24 C atoms, n is an integer of 6 to 20, and M.sup.+ is a cation selected from the group consisting of Na.sup.+, K.sup.+, and NH.sub.4.sup.+.
Claims13
A method of manufacturing an aqueous O/W dispersion of a fortified rosin by mixing said fortified rosin with water and a dispersing agent, comprising:
- (a) first forming a dispersion of the w/o type in the presence of said dispersing agent;
- and
- (b) converting said W/O dispersion to said O/W dispersion by sequential addition of water thereto, wherein said dispersing agent has the general formula:
- ##STR16## in which R is an straight- or branched-chain alkyl group having 4 to 24 C atoms, n is an integer of 6 to 20, and M.sup.+ is a cation selected from the group consisting of Na.sup.+, K.sup.+, and NH.sub.4.sup.+.
A method of manufacturing sized paper products comprising the step of treating paper with an aqueous O/W dispersion of a fortified rosin, said rosin having been prepared by mixing said rosin with water and a dispersing agent, comprsing:
- (a) first forming a dispersion of W/O type in the presence of said dispersing agent, and
- (b) converting said W/O dispersion to said O/W dispersion by sequential addition of water thereto, wherein said dispersing agent has the general formula:
- ##STR17## in which R is a straight- or branched-chain alkyl group having 4 to 24 C atoms, n is an integer of six to twenty, and M.sup.+ is a cation selected from the group consisting of Na.sup.+, K.sup.+, and NH.sub.4.sup.+.
Dependencies are inferred from the claim text.