A modified polyurethane oligomer, its preparation method and its application in photocuring digital inkjet printing

A digital inkjet printing and oligomer technology, applied in application, ink, dyeing, etc., can solve the problems of products with irritating odor, numerous preparation steps, toxicity and risks, etc., achieve complete photocuring reaction and reduce pH sensitivity The effect of high stability, solid content and transparency

Active Publication Date: 2020-05-05
浙江中蝶坊新材料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of small molecule tertiary amine is easy to migrate and yellow, which makes the compatibility between UV or visible light-curable coatings and inks poor, difficult to store, numerous preparation steps, complicated process, high cost, high toxicity, and pungent odor. Easy yellowing, potential toxicity and risks, etc., which limit its application in the field of direct contact with the human body

Method used

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  • A modified polyurethane oligomer, its preparation method and its application in photocuring digital inkjet printing
  • A modified polyurethane oligomer, its preparation method and its application in photocuring digital inkjet printing
  • A modified polyurethane oligomer, its preparation method and its application in photocuring digital inkjet printing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] After all the raw materials were dehydrated and dried, 35.30 mmol of isophorone diisocyanate was added to a four-necked flask, and then 10 mmol of polypropylene glycol with a molecular weight of 800 was placed in a constant pressure dropping funnel at 0.3 drops / second (hereinafter referred to as Be dripped in the flask at the speed of d / s), control stirring speed at about 350r / min, N 2 The reaction was carried out at 80°C for 4h under the protection of the atmosphere. continue at N 2 The temperature was lowered to 70°C under atmosphere protection, and starvation feeding method was used to drop 10.50mmol of N-methylethylene glycol amine diluted with 3ml of acetone at a rate of 0.2d / s. After reacting for 0.5h, 7.55mmol of 1 was added dropwise. 4-butanediol reacted for 3 hours to extend the chain, pay attention to the change of system viscosity and rotational speed, until the NCO value dropped to the theoretical value of 2.90%. Subsequently, 14.63 mmol of hydroxyethyl me...

Embodiment 2

[0039] After all raw materials have been dehydrated and dried, 34.55 mmol of hexamethylene diisocyanate is added to a four-necked flask, and 10 mmol of polyethylene glycol with a molecular weight of 2000 is placed in a constant pressure dropping funnel, and the 0.3 d / s The speed is added dropwise in the flask, and the stirring speed is controlled at about 350r / min, N 2 The reaction was carried out at 80°C for 4h under the protection of the atmosphere. continue at N 2 The temperature was lowered to 65°C under the protection of the atmosphere, and starvation feeding method was adopted, and 10.50mmol of N-methylethylene glycol amine diluted with 3ml of acetone was added dropwise at a rate of 0.2d / s. After reacting for 0.5h, 11.60mmol of 1 was added dropwise. 4-butanediol reacted for 4 hours to extend the chain, pay attention to the change of system viscosity and rotational speed until the NCO value dropped to the theoretical value of 1.25%. Subsequently, 6.42 mmol of hydroxyeth...

Embodiment 3

[0042] After all raw materials have been dehydrated and dried, 31.56mmol of 4,4-diisocyanate dicyclohexylmethane was added to a four-necked flask, and 10mmol of polytetrahydrofuran with a molecular weight of 1200 was placed in a constant pressure dropping funnel, 0.3d / s speed into the flask, control the stirring speed at about 350r / min, N 2 The reaction was carried out at 80°C for 2h under the protection of the atmosphere. continue at N 2 The temperature was lowered to 65°C under atmosphere protection, and starvation feeding method was used to drop 10.50mmol of N-phenylethylene glycol amine diluted with 3ml of acetone at a rate of 0.2d / s. After reacting for 0.5h, 4.44mmol of 1 was added dropwise. 4-butanediol reacted for 2 hours to extend the chain, pay attention to the change of system viscosity and rotational speed until the NCO value dropped to the theoretical value of 4.30%. Subsequently, 20.05 mmol of hydroxyethyl methacrylate was added as an active end-capping agent, ...

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Abstract

The invention relates to a modified polyurethane oligomer, a preparation method thereof and application thereof in photocuring digital ink-jet printing, and belongs to the field of photosensitive polymer materials. The invention provides an amino modified polyurethane acrylate oligomer, the structural formula of the amino modified polyurethane acrylate oligomer is shown as (I) in the description. The amino modified polyurethane acrylate oligomer prepared by the preparation method disclosed by the invention has the advantages of low preparation cost, simple and convenient synthesis operation, safety and environmental protection, high yield, low viscosity, good photopolymerization reactivity and solubility and wide universality, and is suitable for most existing photocuring systems and equipment. Meanwhile, an immobilizing membrane taking the amino modified polyurethane acrylate oligomer as an oligomer is not easy in yellowing, low in migration, non-toxic and odorless, and wide application prospect in the fields of photocuring and digital printing is realized.

Description

technical field [0001] The invention relates to a modified polyurethane oligomer, its preparation method and its application in photocuring digital inkjet printing, belonging to the field of photosensitive polymer materials. Background technique [0002] Different from the traditional technology, photocuring is a process of using high-efficiency energy such as visible light, ultraviolet light (UV) or laser as the triggering means to trigger various liquid components with special configurations at room temperature, so that all of them can be quickly converted into solids, which is energy-saving. , Environmental protection, economy, high efficiency and simple operation, the excellent characteristics are developing rapidly. Photocurable coatings are mainly composed of photosensitive prepolymers, photoinitiators, reactive diluents and other additives (such as colorants, leveling agents, defoamers, etc.). [0003] The development and application of digital inkjet processing tech...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/12C08G18/32C08G18/48C08G18/73C08G18/75C08G18/83C08G18/66D06P1/52D06P5/30D06P3/60D06P3/52C09D11/38
CPCC08G18/12C08G18/3275C08G18/329C08G18/4825C08G18/4833C08G18/4854C08G18/6681C08G18/73C08G18/755C08G18/758C08G18/831C09D11/38D06P1/5285D06P3/52D06P3/60D06P5/30C08G18/3206
Inventor 邵建中孟一丁黄益王成龙王莉莉
Owner 浙江中蝶坊新材料科技股份有限公司
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