Method for preparing novel aqueous fluorescence polyurethane

A polyurethane, water-based technology, applied in the field of preparation of new water-based fluorescent polyurethane, can solve the problems of polymer fluorescence properties not being systematically researched, fluorescence properties neglected, etc., and achieve the effects of high stability, low cost and reasonable preparation method.

Inactive Publication Date: 2019-09-10
SUZHOU CHIEN SHIUNG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, few studies in the current literature focus on the synthesis and modification of waterborne polyurethane-based fluorescent materials through the reaction of fluorescent agents with diisocyanates, and the influence of fluorescent properties with changes in the external environment is often ignored, resulting in the fluorescence of such polymers. performance has not been systematically studied

Method used

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  • Method for preparing novel aqueous fluorescence polyurethane
  • Method for preparing novel aqueous fluorescence polyurethane
  • Method for preparing novel aqueous fluorescence polyurethane

Examples

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Embodiment 1

[0029] A method for preparing a novel water-based fluorescent polyurethane. Before the preparation, the isophorone diisocyanate is vacuum-dried at 60° C. for 12 hours before use. The acetic acid was dried in 4 Å molecular sieves for 24 h before use.

[0030] When preparing, take a 250 mL flask equipped with a reflux condenser, a mechanical stirring rod, a thermometer and a nitrogen inlet, and prepare according to the following steps:

[0031] (1) Inflate nitrogen, add metered isophorone diisocyanate, polytetramethylene ether glycol and methyldiethanolamine under the protection of nitrogen, heat the mixture to 70°C, add stannous octoate dropwise as a catalyst, Stir until the NCO content in the system reaches the theoretical value (determined by di-n-butylamine titration); the molar mass ratio of isophorone diisocyanate, polytetramethylene ether glycol and methyldiethanolamine is 1:0.3 : 0.15; organotin catalysts account for 0.01% of the total weight by weight;

[0032] (2) Co...

Embodiment 2

[0038] A method for preparing a novel water-based fluorescent polyurethane. Before the preparation, the isophorone diisocyanate is vacuum-dried at 60° C. for 24 hours before use. The acetic acid was dried in 4 Å molecular sieves for 48 h before use.

[0039] When preparing, take a 250 mL flask equipped with a reflux condenser, a mechanical stirring rod, a thermometer and a nitrogen inlet, and prepare according to the following steps:

[0040] (1) Inflate nitrogen, add metered isophorone diisocyanate, polytetramethylene ether glycol and methyldiethanolamine under the protection of nitrogen, heat the mixture to 100°C, add di(dodecyl Sulfur) dibutyltin as a catalyst, stirring until the NCO content in the system reaches the theoretical value (measured by di-n-butylamine titration); wherein the isophorone diisocyanate, polytetramethylene ether glycol and methyldiethanolamine The molar mass ratio is 1:0.5:0.45; the organotin catalyst accounts for 0.05% of the total weight by weight...

Embodiment 3

[0047] A method for preparing a novel water-based fluorescent polyurethane. Before the preparation, the isophorone diisocyanate is vacuum-dried at 60° C. for 18 hours before use. The acetic acid was dried in 4 Å molecular sieves for 36 h before use.

[0048] When preparing, take a 250 mL flask equipped with a reflux condenser, a mechanical stirring rod, a thermometer and a nitrogen inlet, and prepare according to the following steps:

[0049] (1) Fill with nitrogen, add metered isophorone diisocyanate, polytetramethylene ether glycol and methyldiethanolamine under the protection of nitrogen, heat the mixture to 90 ° C, drop dibutyltin diacetate as a catalyst , stirring until the NCO content in the system reaches the theoretical value (determined by di-n-butylamine titration); wherein the molar mass ratio of isophorone diisocyanate, polytetramethylene ether glycol and methyldiethanolamine is 1: 0.4:0.2; organotin catalyst by weight, accounting for 0.04% of the total weight;

...

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Abstract

The invention provides a method for preparing novel aqueous fluorescence polyurethane. The method comprises the following step: enabling a fluorescent agent to react with isophorone diisocyanate, polytetramethylene ether glycol and methyldiethanolamine, so as to synthesize a modified aqueous polyurethane fluorescence material. The prepared novel aqueous fluorescence polyurethane has the advantagesof being friendly to environment, high in stability and good in fluorescence effect, and can be applied to fields such as anti-fake marks, traffic marks, elastic materials, chemical detection, fluorescence inks and fluorescence coatings.

Description

technical field [0001] The invention belongs to the field of polymer material processing, and in particular relates to a preparation method of a novel water-based fluorescent polyurethane. Background technique [0002] Polyurethane is the abbreviation of polyurethane (Polyurethane, PU for short). It is a block polymer formed by addition polymerization, with flexible and elastic polyether or polyester as the soft segment, rigid and hard urethane as the hard segment, and a polymer compound containing a considerable number of urethane bonds . Polyurethane as a textile finishing agent first appeared in Europe. It is usually a solvent-based product, which is blended with crosslinking agent and paint for textile coating. Because of its excellent physical and chemical properties, it has been widely used in the synthetic leather and artificial leather industries. It is a multifunctional polymer material. It has become an indispensable class of polymer materials in social and econ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/75C08G18/66C08G18/48C08G18/32C08G18/28C09K11/06
CPCC08G18/2885C08G18/3275C08G18/4854C08G18/6688C08G18/755C09K11/06C09K2211/14C09K2211/145
Inventor 贾红圣顾晓吴顾准程炜
Owner SUZHOU CHIEN SHIUNG INST OF TECH
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