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Method for preparing cation high molecular base petroleum resin neutral sizing agent

A neutral sizing agent and petroleum resin technology, applied in the field of polymer chemistry, can solve the problems of easy gel generation, poor freeze-thaw stability of emulsion, low retention rate of paper fibers, etc., to improve stability and water resistance and sizing effect, the effect of improving stability and sizing performance

Inactive Publication Date: 2010-02-17
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] There are many disadvantages in the petroleum resin emulsion prepared by small molecule surfactant: (1) under high shear force, it is easy to produce gel; (2) the freeze-thaw stability of the emulsion is poor; (3) small molecule emulsifier is easy to produce Surface migration affects the water resistance of the paper; (4) The foaming of the emulsion is large, which affects the normal operation of the paper machine; (5) The retention rate on the paper fiber is low, and the sizing effect is poor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 1) Preparation of cationic polymer emulsifier:

[0022] N, N-dimethylformamide, styrene, methyl methacrylate, methacryloxyethyltrimethylammonium chloride (DMC), glacial acetic acid according to the ratio of 2.5:1.2:1.5:1.4:0.5 Mix the mass ratio to prepare system A, add azobisisobutyronitrile to system A at 90°C, wherein the mass ratio of azobisisobutyronitrile to vinyl comonomer is 3:100, and continue the heat preservation reaction for 5 hour, can make cationic macromolecule emulsifier, and described vinyl comonomer is styrene, methyl methacrylate, methacryloyloxyethyl trimethyl ammonium chloride (DMC);

[0023] 2) Preparation of modified petroleum resin:

[0024] Add C9 series petroleum resin, maleic anhydride, and p-hydroxyanisole to the reactor, wherein the mass ratio of petroleum resin, maleic anhydride, and p-hydroxyanisole is 94:10:1.6, and raise the temperature to 180°C , stirring and heat preservation reaction for 6 hours to obtain modified petroleum resin; ...

Embodiment 2

[0028] 1) Preparation of cationic polymer emulsifier:

[0029] Mix N,N-dimethylacetamide, styrene, ethyl acrylate, methacryloxyethyl dimethyl benzyl ammonium chloride, and glacial acetic acid in a mass ratio of 3.3:1.8:1.2:1.9:1.2 Obtain system A, at 83 ℃, add azobisisoheptanonitrile to system A, wherein the mass ratio of azobisisoheptanonitrile and vinyl comonomer is 5: 100, continue insulation reaction for 4 hours, namely A cationic polymer emulsifier can be obtained, and the vinyl comonomer is styrene, ethyl acrylate and methacryloyloxyethyl dimethyl benzyl ammonium chloride;

[0030] 2) Preparation of modified petroleum resin:

[0031] Add C5-series petroleum resin, maleic anhydride, and hydroquinone to the reactor, wherein the mass ratio of petroleum resin, maleic anhydride, and hydroquinone is 90:5:1.2, raise the temperature to 200°C, and stir Lower insulation reaction 4 hours, obtained modified petroleum resin;

[0032] 3) Preparation of cationic polymer-based petrol...

Embodiment 3

[0035] 1) Preparation of cationic polymer emulsifier:

[0036] Mix N-methylpyrrolidone, styrene, butyl methacrylate, acryloyloxyethyltrimethylammonium chloride, and glacial acetic acid in a mass ratio of 3.8:1.5:1.8:1.3:1.6 to prepare system A. At 88°C, add dibenzoyl peroxide to system A, wherein the mass ratio of dibenzoyl peroxide to vinyl comonomer is 7:100, and continue to keep warm for 6 hours to prepare cationic polymer Emulsifier, the vinyl comonomers are styrene, butyl methacrylate and acryloyloxyethyltrimethylammonium chloride.

[0037] 2) Preparation of modified petroleum resin:

[0038] Add carbon nine series petroleum resin, maleic anhydride, o-sec-butyl 4,6-dinitrophenol into the reactor, wherein the quality of petroleum resin, maleic anhydride, o-sec-butyl 4,6-dinitrophenol The ratio is 96:3:0.8, the temperature is raised to 170°C, and the reaction is kept under stirring for 7 hours to obtain the modified petroleum resin;

[0039] 3) Preparation of cationic po...

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Abstract

The invention discloses a method for preparing a cation high molecular base petroleum resin neutral sizing agent. The method comprises the following steps: under the function of an organic solvent which can be mutually soluble to water, taking vinyl monomers, such as styrene, an acrylate class monomer, a cation monomer and the like, as a copolymerization monomer and preparing cation saponin-free benzene emulsion by saponin-free emulsion polymerization; taking the cation saponin-free benzene emulsion as a cation high molecular emulsifying agent, emulsifying and dispersing petroleum resin modified by maleic anhydride and preparing cation high molecular base petroleum resin neutral sizing agent emulsion with favorable stability and sizing performance by homogenizing at high pressure. The product has favorable stability and sizing performance; the cation high molecular base petroleum resin neutral sizing agent prepared by the invention has stronger cation performance, particles have positive charges and are beneficial to retenting and combining with paper fibre, and the cation high molecular emulsifying agent also has a certain sizing synergistic action, thereby enhancing the stabilityand the sizing performance of the emulsion greatly.

Description

technical field [0001] The invention belongs to the field of polymer chemistry, in particular to a preparation method of a cationic polymer-based petroleum resin neutral sizing agent. Background technique [0002] With the modernization of offset printing technology, the quality requirements for paper are increasing, and the demand for medium-alkaline paper is also gradually increasing. Compared with acid sizing, neutral sizing has more obvious advantages in terms of improving paper whiteness, improving printing adaptability, reducing overall cost, and favoring the market and users. [0003] Petroleum resin is abundant in sources and cheap in price. C9 series petroleum resins are polymerized from styrene, methylstyrene, indene, etc., and C5 series petroleum resins are polymerized from cyclopentadiene, isoprene, pentadiene, etc. Petroleum resin is a weakly polar substance. It can be used as a paper sizing agent because of its excellent alkali resistance, acid resistance, wa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H21/16D21H17/45D21H17/34
Inventor 沈一丁费贵强李刚辉李小瑞王海花
Owner SHAANXI UNIV OF SCI & TECH
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