Waterborne acrylic resin capable of absorbing and degrading formaldehyde and preparation method thereof

A water-based acrylic acid, adsorption and degradation technology, applied in the field of water-based acrylic resin, can solve the problems of affecting the performance of coatings, harsh conditions, long time, etc., and achieve the effect of high viscosity, good film-forming performance, and changing photocatalytic degradation.

Pending Publication Date: 2019-09-06
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the mechanism, it can be roughly divided into three categories. One is physical adsorption, which mainly relies on adsorbents to store and fix free formaldehyde. This method is simple to operate and low in cost, but there may be a problem of desorption after a long time; the other is catalytic oxidation. Oxidize formaldehyde to harmless CO 2 and H 2 O, this method is simple to operate and has good effect, but it has problems such as high cost and harsh conditions, so it has not been widely used; the third is chemical reaction, which uses the characteristics of carbonyl or α-H on formaldehyde to react, thereby removing free Formaldehyde, this method has the best effect on removing formaldehyde, and there is no secondary emission, so it is easier to apply to textiles and formaldehyde-removing sprays, etc.
However, since some formaldehyde-removing additives will react with coating additives after being added and affect the performance of coatings, it is necessary to screen formaldehyde additives before they can be directly applied to coatings.

Method used

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  • Waterborne acrylic resin capable of absorbing and degrading formaldehyde and preparation method thereof
  • Waterborne acrylic resin capable of absorbing and degrading formaldehyde and preparation method thereof
  • Waterborne acrylic resin capable of absorbing and degrading formaldehyde and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A kind of water-based acrylic resin that can adsorb and degrade formaldehyde, its component includes methyl methacrylate, butyl acrylate, methacrylic acid, p-divinylbenzene and acrylamide, and its specific formula is as follows:

[0035]

[0036] The preparation method of the water-based acrylic resin capable of absorbing and degrading formaldehyde, the steps are as follows:

[0037] 1), in terms of mass percentage, first mix the alkyl methacrylate, alkyl acrylate, alkyl carboxylic acid and crosslinking agent in the raw material formula to make mixed monomer; The initiator is dissolved in deionized water accounting for 30% of the total mass of the emulsifier and the emulsifier accounting for 50% of the total mass of the emulsifier to prepare a first solution. According to the FOX formula, the Tg of the copolymer composed of mixed monomers is 6°C;

[0038] 2) Preparation of seed emulsion: Add the remaining water, initiator and emulsifier into the reactor, stir and di...

Embodiment 2

[0044] A waterborne acrylic resin capable of adsorbing and degrading formaldehyde comprises propyl methacrylate, ethyl acrylate, methacrylic acid, o-divinylbenzene, N,N-methylenebisacrylamide (MBA), and its specific composition The distribution is as follows:

[0045]

[0046]

[0047] The preparation method of the water-based acrylic resin capable of absorbing and degrading formaldehyde, the steps are as follows:

[0048] 1), in terms of mass percentage, first mix the alkyl methacrylate, alkyl acrylate, alkyl carboxylic acid and crosslinking agent in the raw material formula to make mixed monomer; 40% of the mass of the total emulsifier of the initiator is dissolved in deionized water accounting for 20% of the total mass of water to prepare a first solution. According to the FOX formula, the Tg of the copolymer composed of mixed monomers is 8°C;

[0049] 2) Preparation of seed emulsion: Add the remaining water, emulsifier and initiator into the reactor, stir and dispe...

Embodiment 3

[0055] A kind of waterborne acrylic resin that can absorb and degrade formaldehyde comprises hexyl methacrylate, hexyl acrylate, methacrylic acid, o-divinylbenzene, adipate dihydrazide (ADH), and its concrete component formula is as follows:

[0056]

[0057] The preparation method of the water-based acrylic resin capable of absorbing and degrading formaldehyde, the steps are as follows:

[0058] 1), in terms of mass percentage, first mix the alkyl methacrylate, alkyl acrylate, alkyl carboxylic acid and cross-linking agent in the raw material formula to make mixed monomers; then account for 45% of the initiator mass 55% of the total emulsifier mass of the initiator was dissolved in deionized water accounting for 35% of the total water mass to prepare the first solution. According to the FOX formula, the Tg of the copolymer composed of mixed monomers=5°C;

[0059] 2) Preparation of seed emulsion: Add the remaining water, emulsifier and initiator into the reactor, stir and d...

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Abstract

The invention discloses waterborne acrylic resin capable of absorbing and degrading formaldehyde. The waterborne acrylic resin capable of absorbing and degrading formaldehyde is prepared by physicallymixing waterborne acrylic acid emulsion prepared by alkyl methacrylate, alkyl acrylate, alkyl carboxylic acid, a crosslinking agent, an initiator and an emulsifier with an aldehyde auxiliary agent. The invention also discloses a preparation method of the waterborne acrylic resin capable of absorbing and degrading formaldehyde. A cross-linking type functional monomer with internal plasticization is introduced into the emulsion of the invention. The prepared emulsion has good film forming property, can be used for preparing waterborne acrylic acid paint for chemically absorbing and degrading formaldehyde and can meet the requirements of functional paint, and a formed film has high density and hardness.

Description

technical field [0001] The invention relates to the field of water-based acrylic resins, in particular to a water-based acrylic resin capable of adsorbing and degrading formaldehyde and a preparation method thereof. Background technique [0002] Formaldehyde is a volatile colorless gas with a special pungent smell, which can cause strong irritation to human eyes and nose, and has been highly concerned by national health organizations and even international health organizations. The International Agency for Research on Cancer (IARC) identified formaldehyde as a Class 1 carcinogen; the World Health Organization International Agency for Research on Cancer (IARC) raised formaldehyde from a Class 2 carcinogen to a Class 1 carcinogen. Aiming at the many harms of formaldehyde to human body, many documents have proposed the method of removing formaldehyde at present. According to the mechanism, it can be roughly divided into three categories. One is physical adsorption, which mainl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/18C08F220/14C08F220/06C08F212/36C08F220/56C08F2/26C08K5/25C08K5/3445
CPCC08F220/18C08F2/26C08K5/25C08K5/3445C08F220/1803C08F220/1806C08F220/1804
Inventor 朱瑞胡峻峰布珈玮朵云霞张赛刚
Owner KUNMING UNIV OF SCI & TECH
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