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Formaldehyde absorption emulsion as well as preparation method and application thereof

A formaldehyde absorption and emulsion technology, applied in the field of formaldehyde absorption emulsion and its preparation, can solve the problems of yellowing and darkening of paint film, limiting the purification rate of formaldehyde and the durability of purification, etc.

Active Publication Date: 2021-03-16
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The traditional emulsion formaldehyde purification mainly relies on the acrylic emulsion with diacetone active functional groups or acetoacetoxyethyl methacrylate to cooperate with amines to react with formaldehyde. For general latex particles, functional acrylic acid is only distributed on the surface. Only some parts can fully contact with formaldehyde, and the internal part is difficult to contact with formaldehyde, which causes the loss of formaldehyde purification performance, and amines themselves are prone to yellowing reactions with pigments and fillers in interior wall coatings, and a large amount of amines will cause paint film The yellowing and darkening of the formaldehyde seriously limit the purification rate and persistence of formaldehyde

Method used

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  • Formaldehyde absorption emulsion as well as preparation method and application thereof
  • Formaldehyde absorption emulsion as well as preparation method and application thereof
  • Formaldehyde absorption emulsion as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0065] Preparation of formaldehyde scavenging aids:

[0066] Formaldehyde removal aid D1: Add 6 parts by mass of 1,4 butanedithiol and 20 parts by mass of triethylamine into a three-necked flask, dissolve in 70 parts by mass of N,N-dimethylformamide, and raise the temperature to 105oC Stir for 12h. After the reaction was completed, ethyl acetate was added for dilution, extracted with saturated ammonium chloride aqueous solution and dichloromethane, dried with anhydrous sodium sulfate, and the product quality was 4.2 parts by mass (yield 70%) after rotary evaporation, and 0.1 mass parts were added One part emulsifier and 0.5 parts by mass of water were stirred until completely dissolved to obtain polythiol oligomer emulsion.

[0067] Preparation of formaldehyde scavenging aid D2: Add 10 parts by mass of 1,5 pentanedithiol and 30 parts by mass of triethylamine into a three-necked flask, dissolve in 80 parts by mass of N,N-dimethylformamide, and the temperature rises to Stir at...

Embodiment 2

[0074] A formaldehyde absorption emulsion, its raw material composition includes the following components in parts by mass: 36.5 parts of deionized water, 2 parts of emulsifier, 1 part of initiator, 30 parts of linear monomer, 1 part of crosslinking monomer, functional monomer 2 parts, 2 parts of hydrophilic monomer, 0.7 parts of neutralizer, 2.5 parts of formaldehyde scavenging aid D1.

[0075] Wherein said emulsifier is SDS (sodium dodecyl sulfate); said linear monomer is 15 parts of methyl methacrylate, 15 parts of butyl acrylate; said functional monomer is acetoacetoxy ethyl methacrylate ; Cross-linking monomer: ethylene glycol dimethacrylate; the hydrophilic monomer is acrylic acid; the initiator is sodium persulfate; the neutralizer is NaOH; the formaldehyde removal aid is formaldehyde removal Auxiliary D1.

[0076] The preparation method of described emulsion comprises the following steps:

[0077] a. Preparation of still bottom liquid A: In the polymerization kettle ...

Embodiment 3

[0091] A formaldehyde absorption emulsion, its raw material composition includes the following components in parts by mass: 70 parts of deionized water, 0.5 parts of emulsifier, 0.5 parts of initiator, 65 parts of linear monomer, 3 parts of crosslinking monomer, functional monomer 3 parts, 1 part of hydrophilic monomer, 1 part of neutralizer, formaldehyde removal aid D2: 6 parts.

[0092] The emulsifier described in the present embodiment is SDBS (sodium dodecylbenzene sulfonate); The linear monomer is 30 parts of styrene, 35 parts of butyl acrylate; The crosslinking monomer is divinylbenzene; The functional monomer is acetoacetoxy ethyl methacrylate; the hydrophilic monomer is methacrylic acid; the initiator is ammonium persulfate; the neutralizer is ethanolamine; Scavenging aid D2.

[0093] The preparation method of described emulsion comprises the following steps:

[0094] a. Preparation of still bottom liquid A: In the polymerization kettle with agitator, condenser and c...

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Abstract

The invention provides a formaldehyde absorption emulsion as well as a preparation method and application thereof. The formaldehyde absorption emulsion comprises latex particles with a core-shell structure and oligomers of polymercaptan, and comprises water, an emulsifier, an initiator, a linear monomer, a crosslinking monomer, a functional monomer, a hydrophilic monomer, a neutralizer and oligomers of polymercaptan. According to the emulsion disclosed by the invention, by utilizing the combined action of the specifically distributed core-shell structure latex particles and the polymercaptan additive, the formaldehyde absorption capacity is greatly improved, the stain resistance of a coating is improved, and the emulsion is suitable for being used as an interior wall coating component.

Description

technical field [0001] The invention belongs to the field of coatings and provides a formaldehyde absorbing emulsion as well as a preparation method and application thereof. Background technique [0002] Formaldehyde is a colorless gas with a strong pungent odor in high concentration. Formaldehyde is easily soluble in water, alcohol and ether. Formaldehyde seriously pollutes the environment and is harmful to human health. It can cause headaches, nausea, fatigue, and other symptoms. In severe cases, it can cause convulsions, coma, damage the human liver, kidneys, brain, and nervous system, and cause serious consequences such as memory loss. The No. 153 Bulletin released by the World Health Organization in 2004 determined that formaldehyde is a carcinogenic and teratogenic substance. In recent years, more and more attention has been paid to the release of free formaldehyde from interior decoration, so the indoor protection of formaldehyde has become an urgent problem to be so...

Claims

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Application Information

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IPC IPC(8): B01D53/18B01D53/14C09D7/63C09D133/12C09D133/08C09D5/16
CPCB01D53/18B01D53/1487B01D53/1493C09D5/1662C09D135/02C09D133/064C09D143/04C09D5/1687B01D2257/704B01D2257/708
Inventor 纪宇轩景传明贾贵玉纪学顺孙家宽
Owner WANHUA CHEM GRP CO LTD