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A kind of polyurethane acrylic acid oligomer and its preparation method and application

A polyurethane acrylate and oligomer technology, applied in polyurea/polyurethane coatings, coatings, etc., can solve problems such as poor mechanical properties of coatings

Active Publication Date: 2021-04-23
WUXI ACRYL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The coating combines the characteristics of fluorine-containing compounds and polyurethane, and has excellent water resistance, oil resistance, acid and alkali resistance, and chemical corrosion resistance, but the mechanical properties of the coating film are not good.

Method used

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  • A kind of polyurethane acrylic acid oligomer and its preparation method and application
  • A kind of polyurethane acrylic acid oligomer and its preparation method and application
  • A kind of polyurethane acrylic acid oligomer and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] Selection of main reaction raw materials:

[0078] Polyol:

[0079] Diisocyanate: Toluene Diisocyanate

[0080] Reactive diluent: Isobornyl acrylate

[0081] Ortho-hydroxy bridged ring structure acrylate:

[0082] The preparation steps of polyurethane acrylate oligomer:

[0083] (1) Polyol reacts with diisocyanate:

[0084] Polyol and diisocyanate are fed according to the -OH:-NCO molar ratio of 1:2, and toluene diisocyanate, 0.05% hydroquinone, 0.1% dibutyltin dilaurate and 20% isobornyl acrylate are added to a machine equipped with In the four-necked flask with stirring, thermometer and constant pressure dropping funnel, stir evenly, keep the temperature at 40°C, slowly add polyols into the four-necked flask through the constant pressure dropping funnel, the dropping time is 1h, after the dropping , continue to stir and raise the temperature to 60° C., and keep it for 0.5 h until the remaining 50% of the isocyanate group-NCO content is obtained to obtain an i...

Embodiment 2

[0090]Selection of main reactant raw materials:

[0091] Polyol:

[0092] Diisocyanate: Isophorone Diisocyanate

[0093] Reactive diluent: norbornyl acrylate

[0094] Ortho-hydroxy bridged ring structure acrylate:

[0095] The preparation steps of polyurethane acrylate oligomer:

[0096] (1) Polyol reacts with diisocyanate:

[0097] Polyol and diisocyanate are fed according to the -OH:-NCO molar ratio of 1:2, adding isophorone diisocyanate, 0.05% p-hydroxyanisole, 0.2% dibutyltin dilaurate and 30% norbornyl acrylate Put it into a four-neck flask equipped with a mechanical stirrer, a thermometer and a constant pressure dropping funnel, stir evenly, keep the temperature at 30°C, and slowly add polyols into the four-necked flask through a constant pressure dropping funnel for 1 hour. After the dropwise addition, the stirring was continued and the temperature was raised to 60° C., and kept for 3 hours until the isocyanate group-NCO content remained at 48%, and an intermed...

Embodiment 3

[0103] Selection of main reactant raw materials:

[0104] Polyol:

[0105] Diisocyanate: Hexamethylene diisocyanate

[0106] Reactive diluent: Isobornyl methacrylate

[0107] Ortho-hydroxy bridged ring structure acrylate:

[0108] The preparation steps of polyurethane acrylate oligomer:

[0109] (1) Polyol reacts with diisocyanate:

[0110] Polyol and diisocyanate are fed according to the -OH:-NCO molar ratio of 1:2.2. Hexamethylene diisocyanate, 0.05% p-hydroxyanisole, 0.02% dibutyltin dilaurate and 40% isoborneol methacrylate Add the ester to a four-necked flask equipped with a mechanical stirrer, a thermometer and a constant pressure dropping funnel, stir evenly, and keep the temperature at 20°C. Slowly add polyols to the four-necked flask through a constant pressure dropping funnel, and the dropping time 3h, after the dropwise addition, continue to stir and raise the temperature to 60°C, keep it for 0.5h, until the isocyanate group-NCO content remains 50%, and an ...

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Abstract

The invention discloses a urethane acrylate oligomer and a preparation method and application thereof. The urethane acrylate oligomer has a structure of formula (I). The preparation method of the oligomer is as follows: (1) a bridge-containing ring structure The polyol and diisocyanate are reacted to obtain an intermediate product; (2) the intermediate product is reacted with an o-hydroxyl bridged ring structure acrylate to obtain the oligomer. The oligomer can be used for a photocurable coating, and the coating comprises the acrylate oligomer and a photoinitiator, and is cured under ultraviolet light irradiation, and the obtained coating film has high mechanical properties, strong solvent resistance, and volume shrinkage. It has the advantages of low rate and strong adhesion.

Description

technical field [0001] The invention belongs to the field of light-curing coatings, and in particular relates to a polyurethane acrylic acid oligomer and its preparation method and application. Background technique [0002] With the increasing emphasis on environmental protection at home and abroad and the promulgation of relevant laws and regulations, the coatings industry is constantly developing towards the five properties of economy, energy saving, environmental protection, high efficiency and multi-energy. Research and development of coating varieties. The photocuring system is mainly composed of oligomers, reactive diluents and photoinitiators. The properties of oligomers determine the main properties of the coating film after photocuring, such as hardness, adhesion, flexibility, and volume shrinkage. Polyurethane acrylate is a kind of important oligomer for photocuring system, which is synthesized by two-step reaction of polyisocyanate, polyol and hydroxyl-containing...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/67C08G18/32C09D175/14C09D7/63
CPCC08G18/3212C08G18/672C09D175/14C09D7/63C08G18/32
Inventor 施英张文泉黄佳斯
Owner WUXI ACRYL TECH