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A kind of flame-retardant modified polyvinyl acetate emulsion and preparation method thereof

A technology of polyvinyl acetate and vinyl acetate, which is applied in the field of halogen-free flame-retardant copolymerized modified polyvinyl acetate emulsion and its preparation, can solve the problems such as the decline of mechanical properties, achieve the improvement of mechanical properties and thermal properties, and improve Stability and the effect of reducing production cost

Active Publication Date: 2019-02-01
台州耘智科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the above problems, the present invention provides first object of the present invention to provide a kind of flame-retardant modified polyvinyl acetate emulsion, comprise the multipolymer shown in formula (I) in this emulsion, utilize flame retardant reaction unit Modified PVAc, by directly introducing halogen-free intumescent flame retardant into the polymer chain to achieve high-efficiency flame-retardant effect, does not contain halogen, is safe and non-toxic, and the effective flame-retardant component is used as flame-retardant modified polyvinyl acetate At the same time, it improves the stability of the emulsion, improves the mechanical properties and thermal properties of the matrix material, and solves the problems of poor stability and mechanical properties of the current flame-retardant polyvinyl acetate.

Method used

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  • A kind of flame-retardant modified polyvinyl acetate emulsion and preparation method thereof
  • A kind of flame-retardant modified polyvinyl acetate emulsion and preparation method thereof
  • A kind of flame-retardant modified polyvinyl acetate emulsion and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032](1) Add 25.26g of dimethyl-2-amino-ethylphosphoramidate, 14.74g of maleic anhydride, 100g of vinyl acetate and 0.1g of terephthalate into a 250mL three-necked flask equipped with a reflux condenser and a thermometer. Phenol, stirred slowly to 72°C, and reacted for 3 hours to prepare a mixed solution containing intumescent flame retardant and vinyl acetate, which was set aside;

[0033] (2) 0.6g initiator potassium persulfate is dissolved in 50mL distilled water, stand-by;

[0034] (3) Add 450mL of distilled water, 0.5g of sodium lauryl sulfate, 1.0g of nonylphenol polyoxyethylene ether and 0.1g of sodium bicarbonate into a four-neck flask, and after it dissolves completely, add 42g of the above-mentioned expansion-type retardant After the mixture of fuel and vinyl acetate is pre-emulsified for 0.5 hours, the temperature is raised to 72°C;

[0035] (4) Add dropwise 33% of the initiator total amount in the mixture of step (3) gained, and finish dropwise in 20 minutes, whe...

Embodiment 2

[0038] (1) Add 13.03g dimethyl-2-amino-hexylphosphoramidate, 6.97g maleic anhydride, 100g vinyl acetate and 0.02g p-benzoquinone in a 250mL there-necked flask equipped with a reflux condenser and a thermometer, Stir and slowly raise the temperature to 40°C, react for 10 hours, and prepare a mixed solution containing intumescent flame retardant and vinyl acetate, which is ready for use;

[0039] (2) 0.2g initiator potassium persulfate is dissolved in 60mL distilled water, stand-by;

[0040] (3) Add 340mL of distilled water, 0.83g of sodium lauryl sulfate, 1.67g of nonylphenol polyoxyethylene ether and 0.2g of sodium bicarbonate into a four-neck flask, and after it is completely dissolved, add 48g of the above-mentioned expansion-type retardant After the mixture of fuel and vinyl acetate is pre-emulsified for 1 hour, the temperature is raised to 73°C;

[0041] (4) Add dropwise 40% of the initiator total amount in the mixture of step (3) gained, and finish dropwise in 15 minutes...

Embodiment 3

[0044] (1) Add 3.36g diethyl-2-amino-butyl phosphoramidate, 1.64g maleic anhydride, 100g vinyl acetate and 0.05g 2-tert-butyl in a 250mL three-necked flask equipped with a reflux condenser and a thermometer base hydroquinone, stirred slowly to 60°C, and reacted for 6 hours to prepare a mixed solution containing intumescent flame retardant and vinyl acetate, which was set aside;

[0045] (2) 0.45g initiator potassium persulfate is dissolved in 40mL distilled water, stand-by;

[0046] (3) Add 160mL of distilled water, 0.67g of sodium lauryl sulfate, 1.33g of nonylphenol polyoxyethylene ether and 0.15g of sodium bicarbonate into a four-neck flask, and add 31.5g of the above-mentioned expansion-type After the mixture of flame retardant and vinyl acetate is pre-emulsified for 0.8 hours, the temperature is raised to 76°C;

[0047] (4) Add dropwise 30% of the initiator total amount in the mixture of step (3) gained, and finish dropwise in 25 minutes, when hardly having monomer conde...

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PUM

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Abstract

The invention provides a flame-retardant modified polyvinyl acetate emulsion and a preparation method therefor. Vinyl acetate is employed as a solvent, in the presence of polymerization inhibitors, organic phosphorus amine compounds shown in the formula (II) is reacted with maleic anhydride to obtain a mixed solution of intumescent flame retardants shown in the formula (III) and vinyl acetate, the mixed solution is added into a water-phase system containing surfactants and buffering agents as reaction monomers, polymerization is carried out under action of initiators and flame-retardant modified polyvinyl acetate emulsion is obtained. The flame retardants have a non-mobility property as a component of flame-retardant modified polyvinyl acetate, the emulsion stability is improved, and the flame retardation effects are good. The preparation method is simple in operation, raw materials are easily available, the method is easy for industrialization, solvent recovery and three wastes (waste gas, waste water and industrial residue) treatment are not needed in the production process, the production technology is simplified, and the production cost is lowered. The formula (II) and the formula (III) are shown in the specification. In the formula (II) and the formula (III), R1 is C2-C6 alkylidene, and R2 is C1-C2 alkyl.

Description

technical field [0001] The invention relates to a flame-retardant polyvinyl acetate emulsion, in particular to a halogen-free flame-retardant copolymerized modified polyvinyl acetate emulsion and a preparation method thereof. Background technique [0002] Polyvinyl acetate (PVAc) emulsion (or "white glue") is a homopolymer or copolymer emulsion with vinyl acetate (VAc) as the main monomer and water as the dispersion medium. It is safe, non-toxic, It has the advantages of convenient operation, fast curing rate, colorless and transparent after curing, and less pollution to the surface of the adherend. It is widely used in wood product bonding, architectural decoration, cigarette manufacturing, printing and binding, and paper / plastic composites. . However, like most polymer materials, PVAc is mainly composed of three elements, C, H, and O. It is a flammable material, and its limiting oxygen index (LOI) is about 19%. It is accompanied by a large amount of black smoke when burni...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F218/08C08F230/02C08F2/38C08F2/26C08F2/30
Inventor 刘义林
Owner 台州耘智科技有限公司
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