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A waterborne polyacrylate/polyurethane/sio 2 Preparation method of nanocomposite adhesive

A polyacrylate and nano-composite technology, applied in the directions of graft polymer adhesives, adhesive additives, adhesive types, etc., can solve the problems of adverse effects of adhesive bonding performance, difficulty in ensuring uniform distribution of inorganic particles, etc.

Active Publication Date: 2020-06-19
ZHEJIANG SCI-TECH UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above method can improve the bonding performance of the adhesive and the strength of the film to a certain extent, there are still the following problems: (1) It is difficult to ensure the uniform distribution of the inorganic particles in the film by simply blending the adhesive particles and inorganic particles into a film (2) In order to improve the uniformity of dispersion of inorganic particles in the dispersion medium and film, it is necessary to add a certain amount of colloidal stabilizers, such as polyvinylpyrrolidone, these stabilizers will have a negative impact on the bonding performance of the adhesive Adverse effects; (3) In order to improve the mixing effect of binder polymer and inorganic particles, some processes need to use organic solvents

Method used

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  • A waterborne polyacrylate/polyurethane/sio <sub>2</sub> Preparation method of nanocomposite adhesive
  • A waterborne polyacrylate/polyurethane/sio <sub>2</sub> Preparation method of nanocomposite adhesive
  • A waterborne polyacrylate/polyurethane/sio <sub>2</sub> Preparation method of nanocomposite adhesive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Weigh respectively 0.3g of anionic emulsifier sodium lauryl sulfate and 0.5g of pH regulator NaHCO 3 , was dissolved in 55g of water to obtain an emulsifier aqueous solution with a pH value of 8.4.

[0055] 0.1 g of vinyl-modified SiO 2 Nanoparticles [number average particle size is 15nm, coupling density is 3.2 μmol·(m 2 SiO 2 ) -1 】Pre-dispersed in 6g isooctyl acrylate, then with 4g isooctyl acrylate, 0.2g methyl methacrylate, 0.4g methacrylic acid, 0.88g 2-hydroxyethyl acrylate, 1.08g polycaprolactone diol ( The number average molecular weight is 1200g·mol -1 ), 0.45g isophorone diisocyanate, 0.5g octadecyl acrylate and 0.34g n-hexadecane are mixed to obtain SiO 2 monomer dispersion.

[0056] SiO 2 The monomer dispersion is added to the emulsifier aqueous solution, and the coarse emulsion is obtained through pre-emulsification, and then the container containing the coarse emulsion is placed in an ice-water bath, and a stable monomer fine emulsion is obtained b...

Embodiment 2

[0060] Weigh 0.7g of cationic emulsifier octadecyltrimethylammonium bromide, 0.16g of sodium dihydrogen phosphate dihydrate and 0.18g of disodium hydrogen phosphate dihydrate, dissolve them in 70g of water, and obtain emulsification with a pH value of 6.8 agent aqueous solution.

[0061] 0.3 g of vinyl-modified SiO 2 Nanoparticles [number average particle size is 20nm, coupling density is 2.5 μmol·(m 2 SiO 2 ) -1 】Pre-dispersed in 12g butyl acrylate, then mixed with 12g butyl acrylate, 1.6g styrene, 0.06g acrylic acid, 0.7g 2-hydroxypropyl methacrylate, 3.48g polyethylene adipate glycol ( The number average molecular weight is 2100g·mol -1 ), 1.15g of 1,4-cyclohexane diisocyanate, and 1.12g of octadecyl acrylate are mixed to obtain SiO 2 monomer dispersion.

[0062] SiO 2 The monomer dispersion is added to the emulsifier aqueous solution, and the coarse emulsion is obtained through pre-emulsification, and then the container containing the coarse emulsion is placed in an...

Embodiment 3

[0065] Weigh 2.4g of non-ionic emulsifier OP-10 and 0.67g of pH regulator sodium citrate, and dissolve them in 48g of water to obtain an emulsifier aqueous solution with a pH value of 7.8.

[0066] 0.48g SiO 2 Nanoparticles [number-average particle size is 30nm, coupling density is 1.9μmol·(m 2 SiO 2 ) -1 】Pre-dispersed in 10g isooctyl acrylate, then mixed with 2.5g isooctyl acrylate, 0.5g styrene, 0.31g 2-hydroxyethyl methacrylate, 0.73g itaconic acid, 0.7g polyethylene oxide glycol ( The number average molecular weight is 1296 g·mol -1 ), 0.35g 1,6-hexamethylene diisocyanate and 0.80g n-hexadecane are mixed to obtain SiO 2 monomer dispersion.

[0067] Subsequent to SiO 2 Add 0.33g of dibenzoyl peroxide to the monomer dispersion, pre-emulsify to obtain a coarse emulsion, then place the container containing the coarse emulsion in an ice-water bath, and ultrasonically treat it for 5 minutes at a power of 450W to obtain a stable monomer Fine emulsion; after purging nitrog...

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Abstract

The invention discloses a preparation method of a water-based polyacrylate / polyurethane / SiO2 nano composite adhesive. The preparation method comprises the following steps: (1) dissolving a water-soluble emulsifier in deionized water to obtain an emulsifier aqueous solution, and adjusting the pH value to 6-10; (2) uniformly dispersing surface vinyl-modified SiO2 nano particles in part of hydrophobic vinyl monomers; adding the remaining hydrophobic vinyl monomers, a polar vinyl monomer, a co-stabilizer, a diisocyanate monomer and a diol prepolymer to obtain monomer dispersion liquid of SiO2 nanoparticles; (3) adding the monomer dispersion liquid of SiO2 nano particles into the emulsifier aqueous solution, stirring and pre-emulsifying to obtain a coarse emulsion; performing ultrasonic treatment in an ice water bath to obtain a monomer miniemulsion; (4) polymerizing the monomer miniemulsion under nitrogen protection to obtain the polyacrylate / polyurethane / SiO2 nano composite adhesive. According to the preparation method disclosed by the invention, the nano composite adhesive is prepared in one step by water-based miniemulsion polymerization and has the advantages of high colloidal stability, high solid content, good adhesion, strong strength of adhesive film and the like.

Description

[0001] (1) Technical field [0002] The invention relates to a water-based polyacrylate / polyurethane / SiO 2 Preparation method of nanocomposite adhesive. [0003] (2) Background technology [0004] There are many types of adhesives, among which polyacrylate adhesives have the characteristics of simple formula, wide bonding range, good weather resistance and low cost, and have been widely used in the bonding of plastic films, fabrics, metal foils and paper. Compared with solvent-based polyacrylate adhesives, water-based polyacrylate adhesives have the characteristics of environmental protection, high solid content, and low cost, and have attracted widespread attention. At present, water-based polyacrylate adhesives still have defects such as adhesion, film strength, and water resistance that are inferior to solvent-based polyacrylate adhesives [Langmuir 2011, 27, 3878–3888.]. Therefore, modifiers such as polyurethane resins, epoxy resins, or metal chelates are often used to imp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J151/08C09J11/04C08F291/12C08F220/18C08F220/14C08F220/20C08F212/08C08F220/06C08F222/02C08F220/32C08G18/42C08G18/48C08G18/63C08G18/67C08G18/75C08G18/73C08G18/76C08F2/28
CPCC08F2/28C08F283/008C08F283/02C08F292/00C08G18/4238C08G18/4833C08G18/4854C08G18/63C08G18/631C08G18/638C08G18/672C08G18/751C08G18/755C08G18/7671C08K2201/011C09J11/04C09J151/08C08K9/00C08K3/36C08F220/1808
Inventor 曹志海王宁宁叶凤莲高峰戚栋明
Owner ZHEJIANG SCI-TECH UNIV
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