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A kind of environment-friendly water-based polyurethane interior wall latex paint and preparation method thereof

A technology for water-based polyurethane and interior wall latex paint, applied in latex paints, polyurea/polyurethane coatings, coatings, etc., can solve the problems of low absolute VOC content, poor freeze-thaw stability, poor stain resistance, etc. Symmetry, reduce interactions, ensure the effect of environmental performance

Active Publication Date: 2017-07-21
WANHUA CHEM GUANGDONG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And because of the structural characteristics of water-based acrylic emulsion, it is necessary to balance the selection of film-forming aids and antifreeze aids in the formulation of latex paint. Without film-forming aids, there will be disadvantages of sticky paint film and poor stain resistance. Adding The absolute VOC content of latex paint after coalescent is greater than 10000ppm
[0005] CN1414045A discloses a kind of zero-VOC environment-friendly pure acrylic latex paint, which has good low-temperature film-forming properties and relatively low VOC content, but it feels sticky and has poor freeze-thaw stability
CN101343451A discloses a kind of zero-VOC healthy interior wall latex paint, but introduces film-forming aid in its formula, so it is difficult to reach ultra-low absolute VOC content

Method used

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  • A kind of environment-friendly water-based polyurethane interior wall latex paint and preparation method thereof
  • A kind of environment-friendly water-based polyurethane interior wall latex paint and preparation method thereof
  • A kind of environment-friendly water-based polyurethane interior wall latex paint and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Under the protection of dry N2, add 400g polyester polyol PNHA1500 (Hua Da Chemical, Mn=1500, neopentyl glycol: 1,6-hexanedi Alcohol mass ratio=1:2), 16.06g neopentyl glycol, 8.8g Ymer TM N120 (non-ionic hydrophilic monomer), stirred at 60°C for 30min, added 86g and 56g 56g of acetone was reacted at 80°C. When the NCO content reaches the theoretical value of 3.12wt%, the prepolymer is cooled to 40°C, dissolved in 800g of acetone, mixed for 10 minutes and then added with 9.6g of ethylenediamine, 14g A95 (sulfamic acid sodium salt, 50wt% aqueous solution), after continuing to stir for 30min, add 575g of deionized water under the shear disperser to disperse; the above emulsion is decompressed and rotary evaporated at 50°C for 1 hour to remove acetone, and it can be obtained Milky white 1# aqueous polyurethane dispersion emulsion; the particle size of the emulsion is 280nm, and the solid content is 50wt%.

Embodiment 2

[0061] in dry N 2 Under the protection of reflux, add 357g polyester polyols PNHA2000 (Hua Da Chemical, Mn=2000, neopentyl glycol: 1,6-hexanediol mass ratio =1:2), 45gPTMEG2000, 14g1,4-butanediol, 6g Ymer TM N120 (non-ionic hydrophilic monomer), stirred at 60°C for 30min, added 72g and 46g 49g of acetone was reacted at 80°C. When the NCO content reaches the theoretical value of 2.65wt%, the prepolymer is cooled to 40°C, dissolved in 692g of acetone, mixed for 10 minutes and then added with 6g of ethylenediamine, 14g (Sulphamic acid sodium salt, 50wt% aqueous solution), after continuing to stir for 30min, add 501g of deionized water under the shear disperser to disperse; the above emulsion is decompressed and rotary steamed at 50°C for 1 hour to remove acetone, and milky white 2# aqueous polyurethane dispersion emulsion; the particle size of the emulsion is 332nm, and the solid content is 50wt%.

Embodiment 3

[0063] in dry N 2 Under protection, add 397g polycarbonate dibasic alcohol NPU-964 (Mn=2000), 98g PTMEG2000, 8g neopentyl glycol, 6g Ymer TM N120 (non-ionic hydrophilic monomer), stirred at 60°C for 30min, added 68.3g and 43.8g 52g of acetone was reacted at 80°C. When the NCO content reaches the theoretical value of 2.38wt%, the prepolymer is cooled to 40°C, dissolved in 732g of acetone, mixed for 10 minutes and then added with 17.5g of isophordione diamine, 16g (sulfamic acid sodium salt, 50wt% aqueous solution), after continuing to stir for 30min, add 541g of deionized water under the shear disperser to disperse; the above emulsion is decompressed and rotary steamed at 50°C for 1 hour to remove acetone, and milky white 3# water-based polyurethane dispersion emulsion; the particle size of the emulsion is 307nm, and the solid content is 50wt%.

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Abstract

The invention relates to environment-friendly water-borne polyurethane interior wall latex paint. The environment-friendly water-borne interior wall latex paint is prepared by using water-borne polyurethane dispersion, water, pigment and filler as main raw materials and adding a wetting agent, a dispersing agent, a thickening agent, a defoaming agent, a preservative, a pH regulator and other auxiliaries. The invention further discloses a method for preparing the environment-friendly water-borne polyurethane interior wall latex paint. The water-borne polyurethane interior wall latex paint prepared by adopting the method has the characteristics of ultralow absolute VOC (volatile organic compounds) content, no odor, environmental friendliness, excellent wiping resistance, good hand feeling and good decorating performance.

Description

technical field [0001] The invention relates to the field of architectural coatings, in particular to a water-based polyurethane interior wall latex paint. Background technique [0002] In my country, interior wall latex paint has experienced many years of development, and is being more and more used in interior wall building decoration. However, some interior wall latex paints will release harmful substances such as formaldehyde and benzene substances during production, construction and application, which can easily induce respiratory diseases and leukemia. Therefore, in recent years, people have paid more attention to the green environmental protection performance of interior wall latex paints. VOC content. [0003] VOC is a volatile organic compound. There are differences in the definition of VOC in different countries and regions. For example, my country stipulates that VOC is sampled by Tenax GC and Tenax TA, and analyzed by non-polar chromatographic columns (polarity ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/04C09D175/06C09D175/08C09D7/12C09D5/02C08G18/66C08G18/42C08G18/44C08G18/48C08G18/12
CPCC08G18/12C08G18/3228C08G18/3234C08G18/4018C08G18/4238C08G18/44C08G18/4854C08G18/664C08G18/6651C08G18/6674C08G18/6685C08G18/751C08G18/7671C08L2205/03C09D5/02C09D7/61C09D175/06C09D175/08C08L1/26C08L101/00C08K3/34C08K2003/265
Inventor 乔义涛王萃萃李坤吕洪朋张洁孙家宽华卫琦
Owner WANHUA CHEM GUANGDONG