Polymerizable flame retardant resin

A technology of flame retardant resin and polyester resin, which is applied in the field of polyester composition, can solve the problems affecting the stability of flame retardant and insulation, and achieve the effects of low saturated vapor pressure, long storage period and low odor

Inactive Publication Date: 2013-09-18
ZHEJIANG RONGTAI TECH ENTERPRISE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The main flame retardant method of the new flame retardant impregnated resin developed in recent years is to add a flame retardant to the insulating resin or replace the common diluent with a flame retardant diluent, which will affect the flame retardant stability and insulation

Method used

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  • Polymerizable flame retardant resin

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Experimental program
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Effect test

Embodiment 1

[0029] Preparation of low-molecular phosphate modified unsaturated polyester resin: react dimethyl methylphosphonate with ethylene glycol at a molar ratio of 1.3:1, under the catalysis of 0.2% catalyst acetylacetonate titanium oxide, the reaction initiation temperature 140°C, raise the temperature to 190°C and keep it warm for 3 hours, then add maleic anhydride (the molar ratio to ethylene glycol is 1:2) and react at 200°C-220°C for 4 hours, keep vacuum for 1 hour (1000Pa) to obtain low molecular phosphoric acid Ester-modified unsaturated polyester, adding 0.1w / w% of polymerization inhibitor, and a diluent made of neopentyl glycol dimethacrylate and diallyl phthalate in a weight ratio of 1:1 to Viscosity 100s (paint 4 cups), to get low molecular phosphate modified unsaturated polyester resin. After testing, the oxygen index (GB / T8924-2005) of unsaturated polyester resin after curing is 40.

[0030] Preparation of polymerizable flame retardant resin: by weight, 4.6 parts of ph...

Embodiment 2

[0032] Preparation of low-molecular phosphate modified unsaturated polyester resin: react diethyl phosphite and diethylene glycol at a molar ratio of 1.3:1, under the catalysis of 0.2% catalyst acetylacetonate titanium oxide, the reaction initiation temperature is 140 ℃, raise the temperature to 190℃ and keep it warm for 3 hours, then add maleic anhydride (the molar ratio to diethylene glycol is 1:2) and react at 200℃-220℃ for 4 hours, keep the vacuum for 1 hour (1000Pa) to obtain low molecular phosphoric acid Ester-modified unsaturated polyester, adding 0.1w / w% of polymerization inhibitor, and a diluent made of neopentyl glycol dimethacrylate and diallyl phthalate in a weight ratio of 1:1 to The viscosity is about 110s (4 cups of coating), and the low molecular phosphate modified unsaturated polyester resin is obtained. After testing, the oxygen index (GB / T8924-2005) of unsaturated polyester resin after curing is 38.

[0033] Preparation of polymerizable flame retardant resi...

Embodiment 3

[0035] The preparation of low-molecular phosphoric acid ester modified unsaturated polyester resin: same as embodiment 2.

[0036] Preparation of polymerizable flame-retardant resin: by weight, 4.4 parts of phosphorus-containing epoxy resin, 2.2 parts of nitrogen-containing epoxy resin, 18 parts of bisphenol A epoxy resin and 48.5 parts of unsaturated polyester resin in Example 2 were combined Mix, then add 10 parts of diluent, 15.4 parts of hydrogenated methyl endomethylene tetrahydrophthalic anhydride, 1 part of dicumyl peroxide and 0.5 part of acetylacetonate to cure to obtain a polymerizable flame retardant resin.

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Abstract

The invention discloses polymerizable flame retardant resin which is prepared by adding low molecular phosphate modified unsaturated polyester resin on the basis of a composition composed of a plurality kinds of epoxy resin. Under the action of such related reagents as a diluent, a curing agent, an initiator and an accessory ingredient, a blend of phosphorus-containing epoxy resin and nitrogen-containing epoxy resin can form an interpenetrating network polymer with crosslinked phosphorus-containing unsaturated polyester resin to improve the high voltage insulation performance, the non-air-gap VPI (Vacuum Pressure Impregnation) property and insulation fullness so as to be applied in the field of VPI insulation impregnation of OVDT (Open Ventilated Dry-Type) VPI dry type transformers.

Description

technical field [0001] The invention relates to a polyester composition, in particular to a polymerizable flame-retardant resin composed of various polyesters, which is mainly suitable for the insulation impregnation process of motors, transformers and coin winding coils. Background technique [0002] In my country, dry-type transformers currently account for an average of 15% to 20% in large and medium-sized cities, and about 50% in cities such as Beijing, Shanghai, and Guangzhou. With the transformation of my country's rural and urban power grids, dry-type transformers are increasing at a rate of about 20% per year. my country has become one of the countries with the largest production and sales in the world, and it is at the leading level in the world in terms of project scale, product capacity, and voltage level. [0003] Since the insulation level of distribution dry-type transformers has been fully developed from F to H, people have put forward higher requirements for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/01C08F283/10C08G59/14
Inventor 曹万荣狄宁宇张志浩沈彬郑亚红刘攀登
Owner ZHEJIANG RONGTAI TECH ENTERPRISE
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