A kind of polyurethane/polyvinyl acetate hybrid emulsion and preparation method thereof

A technology of polyvinyl acetate and polyurethane, which is applied in the field of architectural coatings or adhesives, can solve the problems of failing to realize the organic combination of polyurethane groups and polyvinyl acetate, and achieve the purpose of overcoming poor stability, improving stability, and improving phase Capacitive and Dispersive Effects

Active Publication Date: 2019-02-12
佛山市顺德区蓝德堡实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Vinyl acetate is suitable for effective polymerization under acidic conditions and has excellent performance under this condition, so the organic combination of polyurethane groups and polyvinyl acetate has not been realized in chemical modification.

Method used

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  • A kind of polyurethane/polyvinyl acetate hybrid emulsion and preparation method thereof

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preparation example Construction

[0047] The preparation method of polyurethane / polyvinyl acetate hybrid emulsion of the present invention comprises the following steps:

[0048] 1. Preparation of double bond-containing polyurethane oligomer monomer

[0049] a: Under normal pressure at 50-90°C, add diols containing hydrophilic groups, macromolecular diols and polyether triols sequentially into a polymerization kettle with a stirrer and a condenser, and Continue to stir for 10-40 minutes until it is completely dissolved;

[0050] b: Add isocyanate to the mixture in step a, and keep the temperature at 60-90°C, react for 1-3 hours, then keep it warm for 10-50 minutes, and add metal catalyst T-12 to complete the reaction;

[0051] c: Add monohydroxyl-containing unsaturated monomers to the mixture in step b, and keep the temperature at 60-90°C, and react for 0.5-2 hours;

[0052] d: adding a chain extender to the mixture in step c, and reacting for 10-40 minutes to obtain a double bond-containing polyurethane oli...

Embodiment 1

[0064] The polyurethane / polyvinyl acetate hybrid emulsion of the present invention comprises water, vinyl acetate, dimethylol propionic acid, polyethylene terephthalate, glycerin initiating trihydric alcohol, hexamethylene diisocyanate, Hydroxyethyl Acrylate, Metal Catalyst T-12, Methyldiethanolamine, Hydrolyzed Polyvinyl Alcohol, N-Isobutoxymethacrylamide, Butyl Acrylate, Sodium Persulfate, Tartaric Acid. The contents of the above components are calculated in parts by mass: 450 parts of water, 320 parts of vinyl acetate, 1 part of dimethylol propionic acid, 40 parts of polyethylene terephthalate, 5 parts of glycerin initiating triol 10 parts of hexamethylene diisocyanate, 1 part of hydroxyethyl acrylate, 0.1 part of metal catalyst T-12, 0.5 parts of methyldiethanolamine, 10 parts of hydrolyzed polyvinyl alcohol, N-isobutoxymethacrylamide 10 parts, 50 parts of butyl acrylate, 1.1 parts of sodium persulfate, 1.1 parts of tartaric acid.

[0065] The preparation method of polyur...

Embodiment 2

[0081] The polyurethane / polyvinyl acetate hybrid emulsion of the present invention comprises water, vinyl acetate, dimethylol butyric acid, 2-sodium sulfonate-1,4-butanediol, polyethylene terephthalate , polybutylene succinate, polyethylene glycol, polypropylene glycol, glycerin initiated triol, trimethylolpropane initiated triol, hexamethylene diisocyanate, diphenylmethane diisocyanate, isofor Alone diisocyanate, hydroxyethyl acrylate, 2-hydroxypropyl acrylate, metal catalyst T-12, triethanolamine, hydroxyethylethylenediamine, ethylenediamine, hydrolyzed polyvinyl alcohol, N-isobutoxymethyl Acrylamide, N-Methylolacrylamide, Diacetone Acrylamide, Butyl Acrylate, Vinyl Tertiary Carbonate, Isooctyl Acrylate, Cyclohexyl Acrylate, Ammonium Persulfate, Hydrogen Peroxide, Tert-Butyl Hydroperoxide , Dibenzoyl peroxide, tartaric acid, white powder, ferrous salt, sodium bisulfite.

[0082] The contents of the above components are calculated in parts by mass: 400 parts of water, 250 pa...

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Abstract

The invention discloses polyurethane / polyvinyl acetate hybrid emulsion. The polyurethane / polyvinyl acetate hybrid emulsion is prepared from water, vinyl acetate, dihydric alcohol containing a hydrophilic group, macromolecular dihydric alcohol, polyether trihydric alcohol, isocyanate, a monohydroxy-containing unsaturated monomer, a chain extender, a metal catalyst T-12, protective colloid, a cross-linking monomer, a copolymerization monomer, an oxidant and a reducing agent; the parts by mass of the components are as follows respectively: 300 to 450 parts of the water, 180 to 320 parts of the vinyl acetate, 1 to 8 parts of the dihydric alcohol containing the hydrophilic group, 40 to 90 parts of the macromolecular dihydric alcohol, 5 to 30 parts of the polyether trihydric alcohol, 10 to 30 parts of the isocyanate, 1.0 to 5.0 parts of the monohydroxy-containing unsaturated monomer, 0.5 to 1.7 parts of the chain extender, 0.1 part of the metal catalyst T-12, 10 to 40 parts of the protective colloid, 10 to 40 parts of the cross-linking monomer, 50 to 100 parts of the copolymerization monomer, 1.1 to 10.5 parts of the oxidant and 1.5 to 5.5 parts of the reducing agent. The polyurethane / polyvinyl acetate hybrid emulsion disclosed by the invention has high stability, good water-resisting performance and good low temperature resisting performance.

Description

technical field [0001] The invention relates to a building coating or an adhesive, in particular to a polyurethane / polyvinyl acetate hybrid emulsion and a preparation method thereof. Background technique [0002] Polyvinyl acetate is widely used in the fields of latex paint and adhesives due to its colorless, odorless, cheap, and high bonding strength. However, polyvinyl acetate itself also has the disadvantages of poor water resistance, cold resistance, room temperature resistance and boiling water resistance, so the application range of polyvinyl acetate has been narrow for a long time. In order to improve the above-mentioned defects, those skilled in the art have been devoting themselves to modifying polyvinyl acetate to improve its comprehensive performance, so modified polyvinyl acetate has appeared on the market. [0003] The current modified polyvinyl acetate is mainly divided into physical modification and chemical modification. Physical modification is to use mech...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F283/00C08F218/08C08F4/40C08G18/67C08G18/66C08G18/48C08G18/42C08G18/12
CPCC08F4/40C08F283/008C08G18/12C08G18/4211C08G18/4238C08G18/4825C08G18/4829C08G18/6659C08G18/6692C08G18/672C08F218/08C08G18/3275C08G18/3281C08G18/3228C08G18/3206
Inventor 陈旨进罗宇韩璐
Owner 佛山市顺德区蓝德堡实业有限公司
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