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Preparation method for waterproof protective perfluoro-acrylate copolymer aqueous dispersion miniemulsion for wood

A technology of perfluoroacrylate and copolymer, which is applied in the field of preparation of water-dispersed miniemulsion of perfluoroacrylate copolymer for wood waterproofing and protection, can solve problems affecting the performance of emulsion products, avoid insoluble problems, and have a large market demand , use the effect of safety

Inactive Publication Date: 2016-02-03
HARBIN SHENGSHI HUALIN TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A notable feature of miniemulsion polymerization is the addition of co-emulsifiers, such as cetane, cetyl alcohol, etc., to achieve the purpose of monomer fine emulsification, but the existence of co-emulsifiers will still affect the performance of emulsion products

Method used

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  • Preparation method for waterproof protective perfluoro-acrylate copolymer aqueous dispersion miniemulsion for wood

Examples

Experimental program
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Effect test

Embodiment 1

[0024] A kind of preparation method of water-dispersed fine emulsion of perfluorinated acrylate copolymer for wood waterproof protection, it is characterized in that: specific steps are as follows:

[0025] ④ Mix 10-40% comonomer mixture, 1.0-6.0% emulsifier and 60-90% deionized water and stir for 10-30 minutes to obtain a pre-emulsion,

[0026] ⑤ Ultrasonic treatment of the obtained pre-emulsion in a sonicator for 1-10min to obtain a stable monomer miniemulsion with a particle size distribution of 30-150nm;

[0027] ⑥ Place the monomer miniemulsion obtained through miniemulsification into a reaction kettle, add chain transfer agent accounting for 0.05-1% of the monomer mass and initiator accounting for 0.05-1% of the monomer mass respectively, and heat up to 50-90 Initiate polymerization at ℃, react for 2-6 hours, keep warm for 1-3 hours, and cool to room temperature when the monomer conversion rate reaches above 95.0%, and obtain by filtration.

[0028] In the ste...

Embodiment 2

[0032] Described chain transfer agent is dodecyl mercaptan; Initiator can be water-soluble persulfate, also can be oil-soluble initiator, or both are used simultaneously, and water-soluble persulfate can be selected from Potassium persulfate, ammonium persulfate or sodium persulfate, the oil-soluble initiator can be selected from azobisisobutyronitrile, azobisisoheptanonitrile or benzoyl peroxide.

Embodiment 3

[0034] The method is to firstly prepare a monomer miniemulsion with uniform dispersion and stable particle size within the range of 30-150nm, then add an initiator, raise the temperature to 50-90°C to initiate polymerization to obtain a copolymer emulsion, or add the initiator first at a low temperature Perform fine emulsification at 40°C, then raise the temperature to initiate polymerization to obtain a copolymer water-dispersed emulsion.

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Abstract

The invention discloses a preparation method for a waterproof protective perfluoro-acrylate copolymer aqueous dispersion miniemulsion for wood. The preparation method particularly comprises the following steps: mixing and stirring a comonomer mixture, an emulsifier and deionized water to obtain a pre-emulsion; performing ultrasonic treatment on the obtained pre-emulsion in an ultrasonic machine to obtain a stable monomer miniemulsion; placing the monomer miniemulsion subjected to fine emulsification treatment in a reaction still, separately adding a transfer agent and an initiating agent, heating to initiate polymerization, performing a reaction, insulating, cooling to the room temperature till a monomer conversion rate reaches 95.0% or above, and filtering to obtain the miniemulsion. The water and oil repellent (namely the waterproof protective perfluoro-acrylate copolymer aqueous dispersion miniemulsion) obtained according to the preparation method does not need an organic solvent, and is safe and environmentally friendly; the prepared miniemulsion is high in storage stability and dilution stability; a copolymer miniemulsion coating formed by the water and oil repellent is high in film-forming property, water resistance and oil resistance.

Description

technical field [0001] The invention relates to a waterproof and protective material for wood and wood products, in particular to a preparation method for water-dispersed fine emulsion of perfluoroacrylate copolymer for waterproof and protective wood. Background technique [0002] Wood, finger-jointed wood, indoor and outdoor wood products, wood-based panels, furniture, solid wood doors and windows, cabinets, and stairs all have natural defects such as swelling when wet and shrinking when dry, which seriously affects product quality, service life and effect. Laminates, density boards, and particle boards, although waterproof glue is used, also have the problems of swelling when they are wet and shrinking when they are dry. In the case of aqueous dispersions, comonomers such as perfluoroalkyl acrylates are generally obtained in the form of emulsion polymerization directly in aqueous dispersions. The conventional emulsion polymerization process requires monomers to migrate fro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/24C08F220/18C08F212/08C08F220/56C08F220/06C08F220/14C08F2/28C08F2/30C08F2/38D06M15/277C09D133/16
Inventor 张福贵
Owner HARBIN SHENGSHI HUALIN TECH
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