Preparation method for low-viscosity high-hydroxyl-value polymer surface enhancer used for paper

A surface enhancer, viscosity and high hydroxyl value technology, applied in the direction of enhancer addition, papermaking, paper coating, etc., can solve the problems of poor stability and low crosslinking density of acrylic resin, and achieve increased crosslinking density and steric hindrance , to ensure the effect of long-term storage stability

Active Publication Date: 2020-11-24
浙江恒川新材料有限公司
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AI Technical Summary

Problems solved by technology

[0004] Aiming at the poor stability and low crosslinking density of water-based high-hydroxyl value acrylic resins, the purpose of the present invention is to provide a method for preparing a low-viscosity, high-stability, ultra-high-hydroxyl polymer surface enhancer for paper

Method used

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  • Preparation method for low-viscosity high-hydroxyl-value polymer surface enhancer used for paper

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preparation example Construction

[0032] The invention provides a method for preparing a low-viscosity high-hydroxyl value polymer surface enhancer for paper, comprising the following steps:

[0033] 1) In parts by weight, add 25 parts of diethylene glycol dimethyl ether dispersion medium into the reactor, and heat to 120-140°C.

[0034] 2) Mix the soft vinyl monomer, hard vinyl monomer, hydroxyl-containing vinyl monomer, glycidyl methacrylate and isobornyl methacrylate in a weight ratio of 20:54:14:1:3 Mixing was performed to prepare a monomer mixed liquid A.

[0035]3) Weigh 69 parts of monomer mixture A, add 1.1-1.4 parts of dibenzoyl peroxide and 0.08-0.15 parts of tert-butyl peroxybenzoate double-initiator system, mix well and slowly add double-initiator system , the dropping time is 2 to 4 hours, and then the heat preservation reaction is continued for 60 to 90 minutes to form a polymer core.

[0036] 4) Weigh 17-69 parts of monomer mixture A, add 3 parts of acrylic acid monomer, 0.5-1.5 parts of diben...

Embodiment 1

[0048] 1) In parts by weight, add 25 parts of diethylene glycol dimethyl ether dispersion medium into the reactor, and heat to 120°C.

[0049] 2) Soft vinyl monomer butyl acrylate, hard vinyl monomer methyl methacrylate, hydroxyl-containing vinyl monomer hydroxypropyl acrylate, glycidyl methacrylate and isobornyl methacrylate 20:54:14:1:3 weight ratio was mixed to prepare monomer mixture A.

[0050] 3) Weigh 69 parts of monomer mixture A, add 1.1 parts of dibenzoyl peroxide and 0.8 parts of tert-butyl peroxybenzoic acid double initiator system, mix well and slowly add the double initiator system dropwise, the dropping time for 2 hours, and then continue to keep warm for 60 minutes to form a polymer core.

[0051] 4) Weigh 17 parts of monomer mixture A, add 3 parts of acrylic acid monomer, 0.5 part of dibenzoyl peroxide, and 0.05 part of tert-butyl peroxybenzoate, and mix well to prepare monomer mixture B.

[0052] 5) Gradually drop the monomer mixture solution B into the pol...

Embodiment 2

[0058] 1) In parts by weight, add 25 parts of diethylene glycol dimethyl ether dispersion medium into the reactor, and heat to 125°C.

[0059] 2) Soft vinyl monomer butyl methacrylate, hard vinyl monomer methyl methacrylate, hydroxyl-containing vinyl monomer hydroxypropyl acrylate, glycidyl methacrylate and methacrylate isoborneol The esters were mixed in a weight ratio of 20:54:14:1:3 to obtain a monomer mixture A.

[0060] 3) Weigh 69 parts of monomer mixture A, add 1.2 parts of dibenzoyl peroxide and 0.09 part of tert-butyl peroxybenzoic acid double initiator system, mix well and slowly add double initiator system, the time for adding for 3 hours, and then continue the incubation reaction for 70 minutes to form a polymer core.

[0061] 4) Weigh 21 parts of monomer mixture A, add 3 parts of acrylic acid monomer, 0.8 part of dibenzoyl peroxide, and 0.1 part of tert-butyl peroxybenzoate, and mix well to prepare monomer mixture B.

[0062] 5) Gradually drop the monomer mixtur...

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Abstract

The invention discloses a preparation method for low-viscosity high-hydroxyl-value polymer surface enhancer used for paper. The preparation method comprises the following steps of: firstly, taking diethylene glycol dimethyl ether as a dispersion medium, taking butyl acrylate, methyl methacrylate, hydroxypropyl acrylate, glycidyl methacrylate and methacrylic acid isobornyl ester as raw materials, and adopting a dibenzoyl peroxide and tert-butyl peroxybenzoate bi-initiation system to enable a monomer to carry out free radical polymerization so as to prepare an acrylic ester kernel; dripping acrylic acid, enabling a carboxyl on a molecular chain of the acrylic acid to react with an epoxy group on the glycidyl methacrylate to generate hydroxyl; then, adding triethanolamine and dioctyl phthalate, and carrying out neutralization to form quaternary ammonium salt, and preparing high-hydroxyl acrylic resin through high-speed dispersion of water; and finally, through compound aqueous blocked polyisocyanate cross-linking agent to construct the surface enhancer used for the paper. The product disclosed by the invention has a multiple crosslinking network structure and can form a crosslinking network with paper base materials, and the performance of a paper base can be efficiently improved.

Description

technical field [0001] The invention belongs to and relates to a preparation method of a low-viscosity high-hydroxyl value polymer surface enhancer for paper. Background technique [0002] The water-based hydroxyacrylic resin is usually composed of acrylic acid, hydroxyl group-containing acrylate monomers and functional acrylate monomers, and then adding a suitable free radical polymerization initiator to form a polymer. After the reaction is completed, add organic alcohol amine to neutralize the carboxyl group on the surface of the polymer, and then add water to disperse under the condition of high-speed rotation. This is also the most effective method for obtaining high-hydroxyl value water-based acrylic resin emulsion. When the water-based high-hydroxyl value acrylic resin is cross-linked with the curing agent, there are many cross-linking sites, and the resin emulsion is easier to form a good compatible system with the curing agent, which makes the composite system more ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F265/06C08F220/18C08F220/14C08F220/20C08F220/32C08F220/06C08F212/08C08G18/80C08G18/63D21H19/24D21H21/16D21H21/18
CPCC08F265/06C08G18/8077C08G18/8064C08G18/633D21H19/24D21H21/16D21H21/18C08F220/1804C08F220/14C08F220/20C08F220/325C08F220/1811C08F220/06C08F220/1802C08F212/08
Inventor 赵新民邱旭峰杨柳青林俊辉陈宪王建军
Owner 浙江恒川新材料有限公司
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