Method for preparing cationic rosin/C9 petroleum resin sizing agent

A cationic rosin and petroleum resin technology, applied in the chemical field, can solve the problems of low fiber retention rate, poor stability, and easy foaming of petroleum resin emulsion, and achieve the goal of improving paper strength, water resistance, and strong protective colloid Effect

Inactive Publication Date: 2013-03-27
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Petroleum resin emulsions basically use some small molecule surfactants as emulsifiers, and the resulting petroleum resin emulsions have disadvantages such as easy foaming, poor stability, and low retention rate on fibers.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 1) Preparation of cationic polymer surfactant

[0020] a) N-methylpyrrolidone, styrene, ethyl methacrylate, acrylamide, methacryloyloxyethyl trimethyl ammonium chloride, glacial acetic acid according to the ratio of 2:1:1.5:1.8:1.3:0.8 The mass ratio is uniformly mixed to prepare system A;

[0021] b) Azobisisobutyronitrile is dissolved in N-methylpyrrolidone at a mass ratio of 0.5:3, wherein the mass ratio of the amount of azobisisobutyronitrile to the total amount of all comonomers used in a) above is 5:100, system B was prepared;

[0022] c) At 60°C, add system B dropwise to system A for 0.5-1.5 hours, and continue the heat preservation reaction for 3-5 hours after the dropwise addition to obtain a cationic polymer surfactant;

[0023] 2) Preparation of cationic rosin / C9 petroleum resin sizing agent:

[0024] Add cationic polymer surfactant, rosin and C9 petroleum resin into the drying reactor at a mass ratio of 5:2:3, heat up to 90°C, and after the rosin and C9 p...

Embodiment 2

[0026] 1) Preparation of cationic polymer surfactant

[0027] a) N, N-dimethylformamide, styrene, ethyl acrylate, acrylamide, methacryloxyethyl dimethyl benzyl ammonium chloride, glacial acetic acid according to 3:1.5:2:1.5: Mix uniformly at a mass ratio of 1.5:1 to prepare System A;

[0028] b) Azobisisoheptanonitrile is dissolved in N,N-dimethylformamide at a mass ratio of 0.8:3, wherein the amount of azobisisoheptanonitrile is equal to that of all comonomers used in the above a) The mass ratio of the total dosage is 1:100, and the system B is obtained;

[0029] c) At 80°C, add system B dropwise to system A for 0.5-1.5 hours. After the dropwise addition, continue to keep warm for 3-5 hours to obtain a cationic polymer surfactant;

[0030] 2) Preparation of cationic rosin / C9 petroleum resin sizing agent:

[0031] Add the cationic polymer surfactant, rosin and C9 petroleum resin into the drying reactor at a mass ratio of 8:4:6, heat up to 100°C, and after the rosin and C9 p...

Embodiment 3

[0033] 1) Preparation of cationic polymer surfactant

[0034] a) N, N-dimethylacetamide, styrene, butyl methacrylate, acrylamide, acryloyloxyethyltrimethylammonium chloride, glacial acetic acid according to 4:2:1:2:1.2: The mass ratio of 0.9 is uniformly mixed to prepare system A;

[0035] b) Dibenzoyl peroxide is dissolved in N,N-dimethylacetamide at a mass ratio of 1:6, wherein the amount of dibenzoyl peroxide is equal to that of all comonomers used in a) above The mass ratio of the total dosage is 4:100, and the system B is obtained;

[0036] c) At 70°C, add system B dropwise to system A for 0.5-1.5 hours, and continue the heat preservation reaction for 3-5 hours after the dropwise addition to obtain a cationic polymer surfactant;

[0037] 2) Preparation of cationic rosin / C9 petroleum resin sizing agent:

[0038] Add cationic polymer surfactant, rosin and C9 petroleum resin into the drying reactor at a mass ratio of 10:6:5, heat up to 110°C, and after the rosin and C9 pe...

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PUM

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Abstract

The invention discloses a method for preparing a cationic rosin/C9 petroleum resin sizing agent. The method comprises the following steps of: preparing a cationic styrene and acrylate polymer through solution polymerization under the action of an organic solvent which can be insoluble with water by taking styrene, an acrylate monomer, acrylamide, a cationic monomer and other vinyl monomers as comonomers; and emulsifying and dispersing a mixture of rosin and C9 petroleum resin by taking the cationic styrene and acrylate polymer as a cationic high polymer surfactant, so as to prepare the cationic rosin/C9 petroleum resin emulsion which has high stability and good sizing performance. According to the prepared cationic rosin/C9 petroleum resin emulsion, the excellent performances of rosin and C9 are comprehensively utilized; the cationic rosin/C9 petroleum resin emulsion has high cationic performance; the particles of the cationic rosin/C9 petroleum resin emulsion have positive charges, which contribute to retention and binding with paper fibers; and moreover, the cationic high polymer surfactant has the capacity of protecting colloid and has a certain sizing synergistic effect, and therefore, the stable performance and sizing performance of the emulsion can be greatly improved.

Description

technical field [0001] The invention belongs to the chemical field, in particular to a preparation method of a cationic rosin / C9 petroleum resin sizing agent. Background technique [0002] Rosin is a complex mixture composed of resin acids (abietic acid, pimaric acid), a small amount of fatty acids, rosin anhydride and neutral substances. Rosin is a rich renewable resource and an indispensable chemical raw material, which has been used directly or after processing in various industrial productions. Rosin is used as an internal sizing agent in the paper industry. Rosin is saponified by caustic soda to make sizing material, which is mixed with pulp and alum is added to sizing paper. After sizing, the paper has a certain degree of water resistance, which can prevent ink penetration, facilitate printing, and improve the strength and smoothness of the paper. [0003] Petroleum resins are rich in sources and low in price, and are mainly divided into C9 petroleum resins and C5 p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H21/16C08F220/56C08F212/08C08F220/18C08F220/34C08F226/02
Inventor 李小瑞牟静王海花费贵强
Owner SHAANXI UNIV OF SCI & TECH
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