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Shitosan styrene-acrylic latex surface sizing agent and method for making same

A technology of surface sizing agent and styrene-acrylic latex, which is applied in the direction of adding water-repellent agents, etc., and can solve problems such as water insolubility and affecting popularization and application

Inactive Publication Date: 2008-03-12
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to its water insolubility, it affects the popularization and application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0041] Chitosan styrene-acrylic latex surface sizing agent preparation method of the present invention, step is as follows:

[0042] 1. Dissolve chitosan in a glacial acetic acid solution with a pH of 3 to 6, and then add functional monomers dimethylaminoethyl methacrylate (DM) and methacryloyloxyethyl trimethyl chloride ammonium chloride (DMC), and react at a temperature of 70-75°C for 1-2 hours to obtain modified chitosan. Chitosan is endowed with good water solubility, film-forming property and cationic property through modification.

[0043] 2. Mix acrylic acid, styrene, butyl acrylate, methyl methacrylate, and butyl methacrylate in proportion, stir at 50-60°C for 1-1.5 hours, cool to obtain a mixed monomer, and set aside.

[0044] 3. Heat the modified chitosan solution prepared in step 1 to 70-75°C, blow in nitrogen, stir for 10-15 minutes, then add N-methylolacrylamide dissolved in water, and heat up to 80-85°C , stirred for 10-15 minutes, added the initiator potassium...

Embodiment 1

[0075] Embodiment 1: chitosan styrene-acrylic latex surface sizing agent raw material composition is as follows, is weight part:

[0076] 3 parts of dimethylaminoethyl methacrylate (DM),

[0077] 2 parts of methacryloyloxyethyltrimethylammonium chloride (DMC),

[0078] Chitosan 0.2 parts,

[0079] 7 parts of glacial acetic acid,

[0080] 3 parts acrylic,

[0081] 45 parts of styrene,

[0082] 20 parts of butyl acrylate,

[0083] 3 parts of methyl methacrylate,

[0084] 3 parts of butyl methacrylate,

[0085] 3 parts of N-methylolacrylamide,

[0086] 0.03 parts of azobisisobutyrocyanide,

[0087] 4 parts of epichlorohydrin,

[0088] 0.5 parts of potassium persulfate,

[0089] 0.2 parts of dodecanethiol,

[0090] 6 parts of sizing synergist PAE,

[0091] Add the total amount of water to a solid content of 21-23 wt%.

[0092] Chitosan styrene-acrylic latex surface sizing agent preparation method of the present invention, step is as follows:

[0093] 1. Dissolve chit...

Embodiment 2

[0099] Embodiment 2: chitosan styrene-acrylic latex surface sizing agent raw material composition is as follows, is weight part:

[0100] 4 parts of dimethylaminoethyl methacrylate (DM),

[0101] 1 part of methacryloyloxyethyltrimethylammonium chloride (DMC),

[0102] Chitosan 0.3 parts,

[0103] 8 parts of glacial acetic acid,

[0104] 2 parts acrylic,

[0105] 50 parts of styrene,

[0106] 18 parts of butyl acrylate,

[0107] 2 parts methyl methacrylate,

[0108] 4 parts of butyl methacrylate,

[0109] 2 parts of N-methylolacrylamide,

[0110] 0.02 parts of azobisisobutyrocyanide,

[0111] 3 parts of epichlorohydrin,

[0112] 0.4 parts of potassium persulfate,

[0113] 0.2 parts of dodecanethiol,

[0114] 5 parts of sizing synergist PAE,

[0115] Add the total amount of water to a solid content of 23-25wt%.

[0116] The preparation method is the same as in Example 1.

[0117] The product performance index of present embodiment is as follows:

[0118] Appearanc...

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Abstract

The invention relates to a surface sizing agent of chitosan styrene-acrylic emulsion as well as relevant preparation methods. The product is a chitosan-SAE type surface sizing agent. Perform reaction modification of Mix chitosan with functional monomer DM and DMC; then, carry forth reaction with N-hydroxyme thyl acrylamide and mixture monomers of propenoic acid, styrene, butyl acrylate, Methyl methacrylate and Butyl Methacrylate; finally, add a sizing enhancement agent PAE into the reaction product. The invention can endow chitosan with perfect water-solubility and film formation properties through modification, and meanwhile, improve reaction activity and functions, in order to prepare surface sizing agent for chitosan styrene-acrylic emulsion with perfect performances. Therefore, the invention makes for paper surface sizing to lower sizing cost.

Description

technical field [0001] The invention relates to a paper polymer surface sizing agent, in particular to a chitosan styrene-acrylic latex surface sizing agent and a preparation method thereof. Background technique [0002] There are four types of existing commercially available polymer surface sizing agents, styrene-maleic anhydride polymer (SMA), styrene-acrylic acid copolymer salt solution (SAA), styrene-acrylate latex (SAE) and Water-soluble polyurethane (PUD). Among them, SMA and SAA are prepared by solution polymerization, and the medium is an organic solvent, which brings a certain degree of pollution and impact on the operator and the environment. The SAE and PUD polymer surface sizing agents are produced by emulsion or aqueous solution polymerization, and the medium used is water, which meets the requirements and development direction of today's green products. [0003] Chinese patent document CN1837464 discloses a preparation method of a modified chitosan papermakin...

Claims

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Application Information

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IPC IPC(8): D21H21/16
Inventor 王正顺陈嘉川陈克复袁令群李永宝张凤山孔凡功王守娟
Owner QILU UNIV OF TECH