Modified solid epoxy resin with high glass transition temperature and high tenacity as well as preparation method thereof

A solid epoxy resin, high vitrification technology, used in epoxy resin coatings, coatings, anti-corrosion coatings, etc., can solve the problem of reducing the flexibility of anti-corrosion coatings, and achieve strong resistance to high temperature cathodic disbondment performance, high toughness, expansion Application-wide effects

Active Publication Date: 2015-07-22
大庆庆鲁朗润科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as the cross-link density increases, the mechanical properties such as flexibility of the anti-corrosion coating will be reduced

Method used

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  • Modified solid epoxy resin with high glass transition temperature and high tenacity as well as preparation method thereof
  • Modified solid epoxy resin with high glass transition temperature and high tenacity as well as preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Mix 100g of epoxy resin E44 with 50g of polyurethane and 0.02g of boron trifluoride ether, raise the temperature to 90°C, react for 4h, then add 0.03g of boron trifluoride ether, raise the temperature to 120°C, react for 10h, and obtain the modified ring oxygen resin. The obtained modified epoxy resin was mixed with 70g of linear bisphenol A type phenolic resin (n=2.5 in the molecular formula), sprayed on a sample plate preheated to 110°C by spraying, cured at 130°C for 24h, and obtained a high Vitrified high toughness modified epoxy resin coating, testing various properties. The glass transition temperature of the coating is 155°C; the cathodic disbondment radius is 9.7mm (1.5V, 95±3°C, 28d); there is no crack after the bending test at -30°C and 3°; the softening point is 105°C; It is 0.255mol / 100g; the functionality is 2.6.

Embodiment 2

[0028] Mix 100g of epoxy resin E44 with 70g of 1,6-hexamethylene diisocyanate and 0.02g of boron trifluoride diethyl ether, raise the temperature to 100°C, and react for 6h, then add 0.03g of triethanolamine, raise the temperature to 150°C, and react for 10h to obtain Modified epoxy resin. The obtained modified epoxy resin was mixed with 70g of linear bisphenol A type phenolic resin (n=1 in the molecular formula), sprayed on a sample plate that had been preheated to 110°C, and cured at 120°C for 24h to obtain high Vitrified high toughness modified epoxy resin coating, testing various properties. The glass transition temperature of the coating is 138°C; the cathodic disbondment radius is 9.2mm (1.5V, 95±3°C, 28d); there is no crack after the bending test at -30°C and 3°; the softening point is 96°C; It is 0.275mol / 100g; the functionality is 2.6.

Embodiment 3

[0030] Mix 100g of epoxy resin E44 with 100g of polysiloxane and 0.02g of boron trifluoride ether, raise the temperature to 120°C, react for 2h, then add 0.03g of boron trifluoride ether, raise the temperature to 150°C, and react for 2h to obtain Modified epoxy resin. The obtained modified epoxy resin was mixed with 70g of linear bisphenol A type phenolic resin (n=4 in the molecular formula), sprayed on a sample plate that had been preheated to 110°C, and cured at 130°C for 24h to obtain high Vitrified high toughness modified epoxy resin coating, testing various properties. The glass transition temperature of the coating is 164°C; the cathodic disbondment radius is 9.5mm (1.5V, 95±3°C, 28d); there is no crack after the bending test at -30°C and 3°; the softening point is 111°C; It is 0.205mol / 100g; the functionality is 2.6.

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Abstract

The invention relates to modified solid epoxy resin with high glass transition temperature and high tenacity. The modified solid epoxy resin is prepared from the following components in parts by weight: 100 parts of epoxy resin, 50-120 parts of a modifier, 0.05-5 parts of a catalyst, and 25-100 parts of a curing agent. The invention further provides a preparation method of the modified solid epoxy resin with high glass transition temperature and high tenacity. The modified solid epoxy resin has the excellent properties that the glass transition temperature is 128-178 DEG C, the cathodic cathodic disbonding radius is smaller than or equal to 10 mm (1.5 V, 92-98 DEG C, 28d), the modified solid epoxy resin can pass a bend test of 3 degrees at minus 30 DEG C as no crack generates, the softening point is 96-115 DEG C, the epoxide number is 0.19-0.275 mol / 100g, and the functionality degree is 2.6, so that the modified solid epoxy resin can be applied to the fields of petroleum and gas long-distance pipelines, urbane groundwater, gas pipe network pipelines, transportation industry (automobiles and ships), oceanographic engineering, corrosion prevention in bridges and construction reinforcing steel bar, and the like in which the use temperature is higher than 95 DEG C.

Description

technical field [0001] The invention belongs to the field of chemical industry, relates to a high glass transition temperature high toughness modified solid epoxy resin and a preparation method thereof, in particular to a method for use in petroleum and natural gas long-distance pipelines, urban groundwater, gas pipe network pipelines, transportation industry (automotive) , ships), marine engineering, bridges and construction reinforcement and other fields with high glass transition temperature and high toughness epoxy resin and preparation method thereof. Background technique [0002] Fusion Bonded Epoxy (FBE) is a premium anti-corrosion coating for protecting underground pipelines. It has excellent adhesion to steel, good chemical resistance, very low oxygen permeability, and good flexibility. Fusion-bonded epoxy powders have been used extensively for anti-corrosion coatings for oil, gas and water pipelines for decades. As the exploration and development of oil and gas r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G59/62C08G59/14C09D163/00C09D5/08
Inventor 吴希革
Owner 大庆庆鲁朗润科技有限公司
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