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Preparation method of interpenetrating network polyurethane acrylate emulsion
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A technology of acrylic polyurethane and interpenetrating network, applied in the field of coatings, can solve the problems of solvent resistance, poor physical and chemical properties and decorative properties, and high hardness, and achieve the effect of improving compatibility, improving physical and chemical properties and decorative properties
Inactive Publication Date: 2012-02-15
DALIAN KEDUN ANTI FOULING MATERIALS
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However, both polyacrylate (PA) emulsion and polyurethane (PU) emulsion also have some disadvantages: polyacrylate (PA) emulsion has high hardness and is not resistant to solvents, while polyurethane (PU) emulsion has poor water resistance and high temperature resistance. , so the organic combination of the two, acrylic polyurethane emulsion came into being
However, in the acrylic polyurethane emulsions prepared by these existing methods, the compatibility between the molecules of the polymers (ie, polyacrylate (PA) emulsion and polyurethane (PU) emulsion) is relatively limited, and it is impossible to realize the intermolecular compatibility between the polymer molecules. Cross-linking and interpenetration, therefore, its physical and chemical properties and decorative properties after film formation are relatively poor
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[0050] Such as figure 1 with figure 2 As shown, the preparation method of the interpenetrating network acrylic polyurethane emulsion provided by the embodiment of the present invention may specifically include the following steps:
[0051] Step A: Put the acrylic monomer into the reaction kettle as a solvent, and add polyurethane, TDI (TDI is the abbreviation of Toluenediisocyanate in English, and the Chinese translation is toluene diisocyanate), polyether and catalyst into the acrylic monomer to form a mixture a;
[0052] Wherein, each component that forms mixture a accounts for the parts by weight of raw material total amount:
[0085] Such as figure 2 As shown, the preparation method of the interpenetrating network acrylic polyurethane emulsion provided by the embodiment of the present invention may specifically include the following steps:
[0086] Step A: putting acrylic monomers into a reaction kettle as a solvent, and adding polyurethane, TDI, polyether and a catalyst to the acrylic monomers to form a mixture a;
[0087] Wherein, each component that forms mixture a accounts for the parts by weight of raw material total amount:
[0093] Step B: Stir the mixture a for 25-35 minutes to make it evenly mixed;
[0094] Wherein, correspondingly, the liquid a is stirred for 25 minutes to 35 minutes. In actual life, it is best to stir the liquid a for 30 minutes, so that the components in the liquid a are just mixed evenly.
[0095] Step C: Sl...
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Abstract
The invention discloses a preparation method of interpenetrating network polyurethaneacrylateemulsion. The preparation method adopts an acrylic acidmonomer as a solvent and comprises the following steps that polyurethane, toluene diisocyanate TDI, a polyether and a catalyst are dissolved in the acrylic acidmonomer and undergo a full reaction; and an emulsifier, a neutralizer and deionized water are added into the reaction system for a further reaction to produce interpenetrating network polyurethaneacrylateemulsion. The preparation method improves the compatibility of polyacrylate (PA) emulsion and polyurethane (PU) emulsion, enables molecules of PA and PU emulsion to carry out inter-crosslinking and inter-penetration, and improves physicochemical performances and decorative performances of a film formed from the interpenetrating network polyurethane acrylate emulsion obtained by the preparation method.
Description
technical field [0001] The invention relates to the field of coatings, in particular to a preparation method of an interpenetrating network acrylic polyurethane emulsion. Background technique [0002] With the gradual enhancement of people's awareness of environmental protection, the safety of coatings and the degree of damage to the environment have received more and more attention. Compared with traditional solvent-based coatings, water-dispersed coatings such as polyacrylate (PA) emulsions and polyurethane (PU) emulsions have the advantages of safety, non-toxicity, no pollution to the environment, and low cost, so they have attracted widespread attention. However, both polyacrylate (PA) emulsion and polyurethane (PU) emulsion also have some disadvantages: polyacrylate (PA) emulsion has high hardness and is not resistant to solvents, while polyurethane (PU) emulsion has poor water resistance and high temperature resistance. , so combine the two organically, and the acryli...
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