Low-cost halogen-free chemical flame-retardant vinyl ester resin and preparation method thereof

A vinyl ester resin and flame-retardant technology, which is applied in the field of low-cost halogen-free chemical flame-retardant vinyl ester resin and its preparation, can solve the problems of unstable flame-retardant effect, poor flame-retardant effect, and high cost. Achieve obvious flame retardant effect, more stable flame retardant effect and low cost

Active Publication Date: 2014-03-19
浙江天和树脂有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above-mentioned problems existing in the prior art, the object of the present invention is to provide a low-cost halogen-free chemical flame-retardant vinyl ester resin and its preparation method, which effectively solves the ubiquitous problems in the field of flame-retardant modified vinyl ester resins. A series of problems such as poor flame retardant effect, unstable flame retardant effect, high cost, and non-environmental protection

Method used

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  • Low-cost halogen-free chemical flame-retardant vinyl ester resin and preparation method thereof
  • Low-cost halogen-free chemical flame-retardant vinyl ester resin and preparation method thereof
  • Low-cost halogen-free chemical flame-retardant vinyl ester resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Put 200g of bisphenol A type E-51 epoxy resin into the reaction kettle with a thermometer, agitator, and gas conduit condenser, stir and gradually raise the temperature to 75°C, add 80g of methacrylic acid, benzyl trimethyl chloride Ammonium chloride 0.8g and hydroquinone 0.05g, benzyltrimethylammonium chloride and hydroquinone were dissolved in methacrylic acid and added, stirred and gradually heated up, kept at 120°C for 1.5h, and the measured acid value dropped to 4mgKOH / g, cool down to 110°C, then add 25g of phosphoric acid dropwise according to the metering ratio, finish the dropwise addition within 30min, then raise the temperature to 120°C, keep the temperature until the acid value drops to 15mgKOH / g, cool down to below 100°C Add 150 g of styrene and 0.05 g of methyl hydroquinone, stir well, cool and filter to obtain a light yellow viscous liquid which is resin sample A.

[0037] Wherein, in the above-mentioned examples, bisphenol A type E-51 epoxy resin is repla...

Embodiment 2

[0039] Put 220g of bisphenol A type E-44 epoxy resin into the reaction kettle with thermometer, stirrer, and gas conduit condenser, stir and gradually raise the temperature to 85°C, add 65g of methacrylic acid and 1.0g of triphenylphosphine and methyl hydroquinone 0.05g, triphenylphosphine and methyl hydroquinone were dissolved in methacrylic acid and added, stirred and gradually raised the temperature, kept at 115°C for 2 hours until the acid value dropped below 5mgKOH / g, Cool down to 110°C, then add 50g of phosphoric acid dropwise according to the metering ratio, finish the dropwise addition within 30 minutes, then raise the temperature to 125°C, keep the temperature until the acid value drops to 13mgKOH / g, cool down to below 100°C and add 150g of styrene and 0.05 g of 2,6-di-tert-butylcatechol, fully stirred, cooled and filtered to obtain a light yellow viscous liquid as resin sample B.

Embodiment 3

[0041] Put 200g of bisphenol A type E-51 epoxy resin into the reaction kettle with thermometer, stirrer, and gas conduit condenser, stir and gradually raise the temperature to 80°C, add methacrylic acid 65g, benzyldimethylamine 1.0 g and 0.05g of 2,6-di-tert-butylcatechol, benzyldimethylamine and 2,6-di-tert-butylcatechol were dissolved in methacrylic acid and added, stirred and gradually heated up, and kept at 113°C for 3h, Until the acid value drops to 4.5mgKOH / g, then add 30g of phosphoric acid dropwise according to the metering ratio, and finish the dropwise addition within 30 minutes. Add 150g of chlorostyrene, 0.05g of copper naphthenate and 0.05g of methyl hydroquinone, stir fully, cool and filter to obtain a light yellow viscous liquid which is resin sample C.

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Abstract

The invention discloses a low-cost halogen-free chemical flame-retardant vinyl ester resin and a preparation method thereof and belongs to the technical field of flame-retardant vinyl ester resins. The low-cost halogen-free chemical flame-retardant vinyl ester resin is prepared by performing a series of reactions on bisphenol A epoxy, unsaturated monobasic acid 5-20, phosphoric acid, a catalyst, a polymerization inhibitor and a crosslinking monomer. The preparation method is simple, and three common problems of the conventional flame-retardant vinyl ester resin, namely poor brominated flame-retardant environment friendly effect, poor physical blending flame-retardant effect and stability and high cost in comparison with other flame-retardant methods, are solved. Moreover, the three wastes are avoided, the vinyl ester resin subjected to phosphoric acid ring opening modification has the performances of flame-retardant property, temperature resistance and corrosion resistance, and the product is high in stability, is an ideal substitute for a brominated flame-retardant chemical modification vinyl ester resin which is more than 30000 yuan per ton in the market and has the halogen-caused environment pollution problem, can be used for fiber reinforce plastic (FRP) products with anti-corrosion flame-retardant requirements as well as the engineering field, and also can be applied to the special fields of manufacturing of finished glass fiber reinforced plastic chimneys with flame-retardant high-temperature-resistant requirements.

Description

technical field [0001] The invention belongs to the technical field of flame-retardant vinyl ester resins, in particular to a low-cost halogen-free chemical flame-retardant vinyl ester resin and a preparation method thereof. Background technique [0002] Vinyl ester resin is a kind of free radical curing thermosetting resin obtained by dissolving the ester product of epoxy resin and methacrylic acid ring-opening reaction in styrene. The main ester molecular chain of bisphenol A vinyl ester resin is Both ends contain vinyl groups, and the middle skeleton is a bisphenol A type epoxy resin structure. The main molecular chain of phenolic vinyl ester resin has a vinyl group at the end of each benzene ring-linked molecular side chain, and the skeleton is a phenolic epoxy resin structure. The final vinyl ester resin has the advantages of both epoxy resin and unsaturated polyester resin: excellent mechanical properties, excellent corrosion resistance, excellent temperature resistan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/10C08G59/17C08G59/16C08G59/14
Inventor 马勇张健
Owner 浙江天和树脂有限公司
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