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Aqueous polyurethane dispersion composition with formaldehyde reactivity as well as preparation method and application thereof

A water-based polyurethane and dispersion technology, used in polyurea/polyurethane adhesives, polyurea/polyurethane coatings, separation methods, etc., can solve the problems of low formaldehyde capture efficiency and secondary pollution by formaldehyde collectors

Active Publication Date: 2013-06-26
WANHUA CHEM GUANGDONG +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the formaldehyde collector prepared by this method has low efficiency in collecting formaldehyde, and simultaneously introduces a lot of heavy metal ions, causing secondary pollution

Method used

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  • Aqueous polyurethane dispersion composition with formaldehyde reactivity as well as preparation method and application thereof
  • Aqueous polyurethane dispersion composition with formaldehyde reactivity as well as preparation method and application thereof
  • Aqueous polyurethane dispersion composition with formaldehyde reactivity as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] A kind of dispersion that has reactive waterborne polyurethane-acrylic acid ester copolymer with formaldehyde, main synthetic method is as follows:

[0076] in dry N 2 Under the protection of protection, add 85g4,4'-dicyclohexylmethane diisocyanate, polycaprolactone dibasic alcohol 2000105g through decompression distillation in the four-neck flask that reflux condenser, mercury thermometer and mechanical stirring are housed, in React at 90°C for 1.5h, track NCO to the theoretical value of 2.0%, cool down to 85°C, add an acetone solution formed by 12g 1,4-butanediol and 2g trimethylolpropane in 50g acetone, and 10g dimethylolpropane The solution formed by the acid in 40g N-methylpyrrolidone was kept for 3 hours, and the content of -NCO was tracked and detected during the experiment. When the content of -NCO was close to the theoretical value, the temperature was lowered and discharged into the dispersion tank, and triethylamine was added to neutralize the pH value. 7-9,...

Embodiment 2

[0104] Application of a water-based polyurethane dispersion composition reactive with formaldehyde in fabric printing glue:

[0105] Synthesis of Waterborne Polyurethane Dispersions:

[0106] in dry N 2 Under protection, add 70g of 4,4'-dicyclohexylmethane diisocyanate, 15g of isophorone diisocyanate, 105g of vacuum distilled Polycaprolactone diol 2000, react at 60-90°C for 1-3h, track NCO to the theoretical value of 2.0%; after cooling down, add 12g of 1,4-butanediol and 2g of trimethylolpropane in 50g of acetone The formed acetone solution, N-methylpyrrolidone solution containing dimethylolpropionic acid (10g of dimethylolpropionic acid solvent 40g of N-methylpyrrolidone), heat preservation reaction 2-4h, tracking detection-NCO When the -NCO content is close to the theoretical value, lower the temperature and add 80g of methyl methacrylate and butyl methacrylate mixed monomers to mix evenly, discharge the material into the dispersion tank and add triethylamine to neutraliz...

Embodiment 3

[0118] in dry N 2Under the protection of protection, add 44g4,4'-diphenylmethane diisocyanate, 19g toluene diisocyanate, 56g good polytetrahydrofuran (Mn =1000) 56g, react at 85°C for 1.5h, track NCO to the theoretical value; cool down to 70°C and add a solution formed by 15g dimethylol propionic acid in 20g N-methylpyrrolidone, 13g 1,4-ring Hexanedimethanol was incubated for 3 hours. During the experiment, the content of -NCO was traced and detected. When the -NCO content was close to the theoretical value, the temperature was lowered and 59g of styrene, 14g of methyl methacrylate, and 25g of n-butyl acrylate were added, stirred and mixed evenly, and the material was discharged. Add triethylamine to the dispersion tank to neutralize to pH 7-9, add 500g deionized water to emulsify and disperse. Add the obtained polyurethane dispersion (PUD) emulsion into the polymerization reaction flask, add 25g monomer methacrylic acid (propyl acetoacetate) ester belonging to the compound o...

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Abstract

The invention relates to an aqueous polyurethane dispersion composition with formaldehyde reactivity as well as a preparation method and application of the aqueous polyurethane dispersion composition. The composition comprises 12wt%-72wt% of polyurethane copolymer based on the total weight of the composition, wherein the weight ratio of the polyurethane to the acrylic ester copolymer is within a range of 1:15 to 15:1 in terms of the solids; the composition is obtained by forming aqueous polyurethane dispersion containing the acrylic ester copolymer through free radical polymerization reaction to one or more acrylic monomers and other optional vinyl compound monomers during the preparation process of the aqueous polyurethane dispersion. The aqueous polyurethane dispersion composition with formaldehyde reactivity disclosed by the invention is applied to the surface coating fields including wood wares, synthetic leathers, papers, fabrics, printing ink paint, adhesives and the like, and preferably applied to the surface coating fields including wood wares, synthetic leathers, fabric paints, adhesives and the like.

Description

technical field [0001] The invention relates to a waterborne polyurethane dispersion composition with formaldehyde reactivity and its preparation and application. Background technique [0002] At present, in various fields closely related to people's lives, including wood, synthetic leather, fabric coatings, adhesives, etc., the pollution of formaldehyde, benzene series, TVOC and other harmful substances brought about by the use of various unenvironmentally friendly raw materials has seriously interfered. It affects people's daily life and affects people's health. Sheets for home decoration, synthetic leather treatment agents and fabric coating treatment agents will contain formaldehyde, which will remain in the materials and slowly emit into the air, and the release period is as long as ten years, seriously affecting people's health . As people's awareness of health and environmental protection continues to strengthen, they pay more and more attention to indoor environmen...

Claims

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Application Information

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IPC IPC(8): C08L75/06C08L75/08C08L33/12C08L25/14C08G18/66C08F220/28C08F8/32C09D175/06C09D175/08C09J175/06C09J175/08B01D53/72B01D53/82
Inventor 孙伟祖张红张洁孙家宽华卫琦丁建生
Owner WANHUA CHEM GUANGDONG
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