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

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

Inactive Publication Date: 2009-08-19
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 part,

[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 chito...

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 chitosan styrene-acrylic latex surface sizing agent and a preparation method thereof, which is a chitosan-SAE type surface sizing agent. After chitosan is reacted with functional monomers DM and DMC, it is mixed with N-methylol acrylamide and acrylic acid, styrene, butyl acrylate, methyl methacrylate and butyl methacrylate. Body reaction, add sizing synergist PAE to the reaction product. The present invention endows chitosan with good water solubility and film-forming property through modification, and improves its reactivity and functionality, and prepares chitosan styrene-acrylic latex surface sizing agent with good performance, which is used for paper surface sizing , can reduce the cost of sizing.

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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Patent Type & Authority Patents(China)
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