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Method for preparing modified propylene oxide ester

An epoxy acrylate and modified technology, applied in application, coating, ink and other directions, can solve the problem of high viscosity of bisphenol A epoxy acrylate finished product, limited flexibility of epoxy acrylate, and limited flexibility improvement and other problems, to achieve the effect of toughness advantage, strong designability, and wide adjustment range.

Inactive Publication Date: 2020-06-09
LIMING RES INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But its main disadvantages are: First, bisphenol A epoxy acrylate has a high viscosity, basically at 50,000-100,000mPa.s / 40°C, and has extremely poor fluidity at room temperature, almost solid
When the amount of polyols is increased, when light curing, due to the existence of more unreacted polyols, the coating film will be fogged and the light transmittance will be low
[0007] Patent documents CN107501522 and CN107540818 disclose a kind of synthetic method of caprolactone acrylate modified epoxy acrylate, specifically utilize caprolactone acrylate and maleic anhydride to react to generate carboxyl-terminated intermediates, and then react with epoxy resin Synthesis of modified epoxy acrylate by reaction, the flexibility of epoxy acrylate modified by this method is limited by the molecular weight of caprolactone acrylate, and the improvement of flexibility is limited

Method used

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  • Method for preparing modified propylene oxide ester
  • Method for preparing modified propylene oxide ester
  • Method for preparing modified propylene oxide ester

Examples

Experimental program
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Effect test

Embodiment 1

[0023] (1) Add polyhexamethylene adipate 100g, succinic anhydride 40g, triethylamine 0.56g, N 2 Under protection, it was reacted at 70-80°C for 2h to obtain Intermediate 1.

[0024] (2) Add epoxy resin (epoxy equivalent 185-195g / eq, 248.3g) and tetraethylammonium bromide (2.1g) to intermediate 1, and react at 80-90°C for 2h to obtain the intermediate 2.

[0025] (3) Add acrylic acid (67.2g), hydroquinone (0.20g), and triphenylphosphine (1.0g) to intermediate 2, and react at 100-105°C for 4h to obtain modified epoxy acrylate a.

Embodiment 2

[0027] (1) Add polyhexamethylene adipate (100g), succinic anhydride (40g), triethylamine (0.56g), N 2 React at 70-80°C for 2h under protection to obtain Intermediate 1.

[0028] (2) Add epoxy resin (epoxy equivalent 185-195g / eq, 186.2g) and tetraethylammonium bromide (1.8g) to intermediate 1, and react at 80-90°C for 2h to obtain intermediate 2 .

[0029] (3) Add acrylic acid (43.2g), hydroquinone (0.18g), and triphenylphosphine (0.8g) to intermediate 2, and react at 100-105°C for 4h to obtain modified epoxy acrylate b.

Embodiment 3

[0031] (1) Add polyhexamethylene adipate (100g), succinic anhydride (40g), triethylamine (0.56g), N 2 Under protection, it was reacted at 70-80°C for 2h to obtain Intermediate 1.

[0032] (2) Add epoxy resin (epoxy equivalent 185-195g / eq, 149.0g) and tetraethylammonium bromide (1.5g) to intermediate 1, and react at 80-90°C for 2h to obtain intermediate 2 .

[0033] (3) Add acrylic acid (28.8g), hydroquinone (0.16g), and triphenylphosphine (0.8g) to intermediate 2, and react at 100-105°C for 4h to obtain modified epoxy acrylate c.

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Abstract

The invention discloses a method for preparing modified propylene oxide ester, which comprises the following steps: (1) reacting polyester polyol with acid anhydride at 60-90 DEG C for 1-2 hours underthe action of 4-dimethylaminopyridine to synthesize carboxyl-terminated polyester polyol, namely an intermediate 1; (2) reacting the intermediate 1 with epoxy resin for 1-2 hours at 80-100 DEG C under the action of a catalyst 1 to prepare polyester polyol toughened and modified epoxy resin, namely an intermediate 2; wherein the catalyst 1 is one of triethylamine, N,N-dimethylaniline and pyridine;(3) reacting the intermediate 2 with acrylic acid for 5-7 hours at 100-120 DEG C under the action of a polymerization inhibitor and a catalyst 2 to prepare modified epoxy acrylate; and wherein the catalyst 2 is one or a combination of tetraethylammonium bromide, benzyl trimethyl ammonium chloride and triphenylphosphine. After the modified epoxy propylene ester prepared by the method is cured, theflexibility of a film is good.

Description

technical field [0001] The invention belongs to the technical field of organic polymers, and relates to a method for preparing modified epoxy acrylate. Background technique [0002] Epoxy acrylate is derived from the initial commercialization of epoxy resin and acrylic acid or methacrylate. It is currently the most widely used photocurable oligomer in the photocurable industry. According to the structure type, epoxy acrylate is divided into bisphenol A type epoxy acrylate, novolac epoxy acrylate, modified epoxy acrylate and epoxy soybean oil acrylate, among which bisphenol A type epoxy acrylate Esters are used the most. [0003] The main features of bisphenol A epoxy acrylate include: fast photocuring reaction rate, high hardness and tensile strength after curing, high gloss of the film layer, and excellent chemical corrosion resistance. It can be widely used in light-curing coatings, inks, and adhesives. But its main disadvantages are: First, the finished product of bisp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G81/00C09D187/00C09D11/101C09D11/102
CPCC08G81/00C09D11/101C09D11/102C09D187/005
Inventor 姜健崔文康石雅琳郑直
Owner LIMING RES INST OF CHEM IND
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