A kind of photocurable waterborne urea-isobutyraldehyde-formaldehyde resin and preparation method thereof

A technology of formaldehyde resin and isobutyraldehyde, applied in the direction of coating, etc., can solve the problems of being unfriendly to the human body and the environment, free uncured groups, water-based urea-isobutyraldehyde-formaldehyde resin is not water-soluble, etc., to achieve photocuring Fast speed, easy to automate production, low toxicity effect

Active Publication Date: 2020-05-08
南雄市三本化学科技有限公司
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Problems solved by technology

[0004] The invention provides a photocurable water-based urea-isobutyraldehyde-formaldehyde resin, which is used to solve the problem that the existing photocurable water-based urea-isobutyraldehyde-formaldehyde resin is not water-soluble and requires an organic solvent when used Dissolution, not friendly to human body and environment, and there is a problem of free uncured groups

Method used

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  • A kind of photocurable waterborne urea-isobutyraldehyde-formaldehyde resin and preparation method thereof
  • A kind of photocurable waterborne urea-isobutyraldehyde-formaldehyde resin and preparation method thereof
  • A kind of photocurable waterborne urea-isobutyraldehyde-formaldehyde resin and preparation method thereof

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preparation example Construction

[0039] The present invention also provides a kind of preparation method of photocurable aqueous urea-isobutyraldehyde-formaldehyde resin, comprising:

[0040] a) dissolving the urea-isobutyraldehyde-formaldehyde resin in an organic solvent and carrying out a catalytic reaction with diisocyanate under the action of a catalyst to obtain a compound of formula (II);

[0041]

[0042] b) the compound of formula (II) is reacted with hydroxyacrylate dissolved in a polymerization inhibitor to obtain the compound of formula (III);

[0043]

[0044] c) dissolving the compound of formula (III) in an organic solvent, adding 3wt% to 10wt% hydrogen peroxide, and performing an oxidation reaction to obtain a compound of formula (IV);

[0045]

[0046] d) A salt-forming reaction is carried out between the compound of formula (IV) and a salt-forming agent to obtain a photocurable water-based urea-isobutyraldehyde-formaldehyde resin having a structure represented by formula (I).

[004...

Embodiment 1

[0087] In this example, a photocurable water-based urea-isobutyraldehyde-formaldehyde resin was prepared according to the following steps:

[0088] 1) A four-necked flask, a mechanical stirrer, a constant pressure funnel, a condenser and a thermometer are equipped on the oil bath, and 14.7 parts by mass of urea-isobutyraldehyde-formaldehyde resin and 13.5 parts by mass of butanone are added to the four-necked flask (through 4A molecular sieve drying for more than 12h), after the urea-isobutyraldehyde-formaldehyde resin is completely dissolved in butanone, weigh 0.1% of the total mass of urea-isobutyraldehyde-formaldehyde resin and butanone and add dibutyltin dilaurate (DBTDL) into a four-neck flask. Then, 8.2 parts by mass of isophorone diisocyanate (IPDI) was dropped into a four-neck bottle, and the dropwise addition was completed within 20 minutes. The temperature was raised to 80° C., and a catalytic reaction was carried out for 7 hours to obtain a compound of formula (II)....

Embodiment 2

[0093] In this example, a photocurable water-based urea-isobutyraldehyde-formaldehyde resin was prepared according to the following steps:

[0094] 1) a four-necked flask, a mechanical stirrer, a constant pressure funnel, a condenser and a thermometer are equipped on the oil bath, and 13.8 parts by mass of urea-isobutyraldehyde-formaldehyde resin and 12.7 parts by mass of methyl ethyl ketone are added to the four-necked flask (through 4A molecular sieve drying for more than 12h), after the urea-isobutyraldehyde-formaldehyde resin is completely dissolved in butanone, weigh 0.1% of the total mass of urea-isobutyraldehyde-formaldehyde resin and butanone and add dibutyltin dilaurate (DBTDL) into a four-neck flask. Then 7.7 parts by mass of isophorone diisocyanate (IPDI) was dropped into the four-neck bottle, the dropwise addition was completed within 20 minutes, the temperature was raised to 80° C., and the catalytic reaction was carried out for 7 hours to obtain the compound of f...

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Abstract

The invention belongs to the field of coating and in particular relates to a photo-curable waterborne urea-isobutyraldehyde-formaldehyde resin and a preparation method thereof. The invention providesthe photo-curable waterborne urea-isobutyraldehyde-formaldehyde resin which has a structure shown as a formula (I). The photo-curable waterborne urea-isobutyraldehyde-formaldehyde resin provided by the invention is soluble in water and is uniform and transparent emulsion at room temperature; a photoinitiator is added and uniformly mixed, a coating product with good adhesion force and peeling strength can be formed through ultraviolet irradiation. When the photo-curable waterborne urea-isobutyraldehyde-formaldehyde resin is used, a dispersion medium is water, so that the emission of volatile organic compounds is greatly reduced; free unreacted groups do not exist and the toxicity is small, so that the photo-curable waterborne urea-isobutyraldehyde-formaldehyde resin is an environment-friendly coating auxiliary agent. The photo-curable waterborne urea-isobutyraldehyde-formaldehyde resin provided by the invention has relatively high carbon-carbon double bond content, a rapid photo-curingspeed and low energy consumption, is convenient to produce automatically and has relatively high economic benefits.

Description

technical field [0001] The invention belongs to the field of coatings, in particular to a photocurable water-based urea-isobutyraldehyde-formaldehyde resin and a preparation method thereof. Background technique [0002] Urea-isobutyraldehyde-formaldehyde resin (UIF) is an important multifunctional coating additive, which has good yellowing resistance and excellent solubility. It can not only improve the adhesion of the coating film, but also improve the gloss and properties such as hardness. The application level of paint additives has become one of the symbols to measure the technical level of paint production. Ultraviolet curing (UV-curing) is a new technology with high efficiency, energy saving and environmental protection. UV curing is to trigger the cross-linking reaction between the prepolymer in the formula and the small molecule acrylate as a reactive diluent by absorbing the energy of ultraviolet light to form a paint film with certain properties, which meets the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G12/44C08G12/12C09D161/32C09D7/20
CPCC08G12/12C08G12/44C09D7/20C09D161/32
Inventor 刘晓暄邹庆鹏黄国辉苏嘉辉
Owner 南雄市三本化学科技有限公司
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