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Method for preparing calcium-zinc epoxy copolymer core-shell emulsion and modified wood-plastic material

A core-shell emulsion and copolymerization technology is applied in the field of preparing calcium-zinc epoxy copolymer core-shell emulsion and modified wood-plastic materials to achieve the effects of improving thermal stability, solving cracking and reducing brittleness

Active Publication Date: 2018-08-24
贵州华锐达环保装饰材料有限公司
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since it is difficult for most single heat stabilizers to suppress both the production of HCl and the initial coloration, the heat stabilizers actually used are composite systems designed based on the principle of synergy

Method used

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Examples

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preparation example Construction

[0018] A preparation method of calcium-zinc epoxy copolymerized core-shell emulsion, comprising the following steps:

[0019] The first step: shell emulsion emulsification: mix the shell phase monomer containing 1~10 parts of polymerizable calcium carboxylate salt monomer and 1~10 parts of polymerizable zinc carboxylate salt monomer with acrylate monomer, and stir Add dropwise to a three-necked flask dissolved with 3%~5% emulsifier aqueous solution to pre-emulsify for later use;

[0020] The second step: emulsification of nuclear emulsion: mix the nuclear phase monomer containing 1~30 parts of epoxy monomer and acrylate monomer, and add dropwise to the three-necked flask with 3%~5% emulsifier aqueous solution dissolved under stirring Pre-emulsified for use;

[0021] Step 3: Preparation of calcium-zinc epoxy copolymer core-shell emulsion by seed emulsion polymerization: add the above-mentioned emulsified core emulsion into a reactor equipped with a thermometer, condenser tube ...

Embodiment 1

[0033] The first step: shell emulsion emulsification: Weigh 2 parts of zinc acrylate, 3 parts of calcium acrylate and emulsifier dissolved in water, weigh 20 parts of methyl methacrylate and 20 parts of butyl acrylate and add them to the above aqueous solution. Stir and emulsify for 30 minutes for later use;

[0034] The second step: emulsification of the nuclear emulsion: Weigh the emulsifier and dissolve it in water, weigh 40 parts of butyl acrylate and 15 parts of glycidyl methacrylate, mix them, add them to the above aqueous solution, and emulsify under mechanical stirring for 30 minutes for later use;

[0035]Step 3: Preparation of core-shell emulsion by seed emulsion polymerization: add the above-mentioned emulsified core emulsion into a reactor with mechanical stirring, the reaction temperature is 80°C, and the reaction time is 2h; the polymerized core emulsion is used as the seed emulsion, and the For the shelled emulsion, the dropwise addition time is 3 hours, the rea...

Embodiment 2

[0039] The first step: shell emulsion emulsification: weigh 4 parts of zinc itaconate, 6 parts of calcium acrylate and emulsifier dissolved in water, weigh 30 parts of methyl methacrylate and 5 parts of butyl acrylate and add them to the above aqueous solution, Emulsify under mechanical stirring for 30min and set aside;

[0040] The second step: emulsification of the nuclear emulsion: Weigh the emulsifier and dissolve it in water, weigh 15 parts of methyl methacrylate, 25 parts of butyl acrylate, and 15 parts of glycidyl methacrylate and mix them into the above aqueous solution. Stir and emulsify for 30 minutes for later use;

[0041] Step 3: Preparation of core-shell emulsion by seed emulsion polymerization: add the above-mentioned emulsified core emulsion into a reactor with mechanical stirring, the reaction temperature is 80°C, and the reaction time is 2h; the polymerized core emulsion is used as the seed emulsion, and the Add the shell emulsion in the second step, the dro...

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Abstract

The invention relates to a method for preparing calcium-zinc epoxy copolymer core-shell emulsion and a modified wood plastic material. The method for preparing the calcium-zinc epoxy copolymer core-shell emulsion comprises the following steps: (1) emulsifying shell emulsion; (2) emulsifying core emulsion; (3) preparing the calcium-zinc epoxy copolymer core-shell emulsion through a seeded emulsion polymerization method. The method for preparing the modified wood plastic material comprises the following steps: (1) drying WF (Wood Flour) and PVC (Polyvinyl Chloride); (2) carrying out spray drying on the calcium-zinc epoxy copolymer core-shell emulsion; (3) weighing dried polymer powder, the PVC and the WF, uniformly mixing on a high-speed dispersion machine, and carrying out blending extrusion in a double-screw extruder, thus obtaining composite material particles. The method disclosed by the invention has the advantages that (1) generation of micromolecular hydrogen chloride during a PVC heating process is effectively inhibited, so that the thermal stability of resin is increased; (2) the brittleness of the PVC can be reduced, and the impact resistance is increased; (3) the problems of cracking, non-uniform size and the like of a PVC wood plastic wallboard during a using process are solved.

Description

technical field [0001] The invention relates to a method for preparing a calcium-zinc epoxy copolymerized core-shell emulsion and a modified wood-plastic material to improve its thermal stability and impact resistance, and belongs to the technical field of preparing PVC wood-plastic composite materials. Background technique [0002] With the shortage of fossil resources, the deterioration of the environment, and the improvement of people's awareness of environmental protection, it has become the development direction of the future society to use renewable resources in nature to replace fossil resources. Wood-plastic composite (WPC) refers to a compound made of wood fiber or plant fiber as a reinforcing filler and thermoplastic materials such as polyvinyl chloride (PVC), polyethylene (PE), polypropylene (PP) or other materials. A new type of material. Wood-plastic material combines the advantages of solid wood and plastic, with high mechanical properties, low water absorptio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F265/06C08F220/14C08F220/18C08F222/02C08F220/06C08F220/04C08F2/26C08F2/30C08L97/02C08L27/06C08L51/00B29C47/92B29C48/92
CPCB29C48/92B29C2948/9258B29C2948/92704C08F2/26C08F2/30C08F265/06C08L97/02C08L2201/08C08L2205/03C08L27/06C08L51/003C08F220/1804
Inventor 罗靖民
Owner 贵州华锐达环保装饰材料有限公司
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