FLAME-RETARDANT BISMALEIMIDE RESIN AND PREPARATION METHOD THEREOF
First Claim
1. A preparation method of flame retardant bismaleimide resin, characterizing in comprising the following steps:
- (1) at a temperature of 0.5 to 4.5°
C., by mole basis, 300 to 400 parts of alkali metal alkali and 180 to 280 parts of water are uniformly mixed to obtain a paste A;
300 to 400 parts of eugenol is dissolved in 1500 to 2600 parts of methyl chloride to obtain a eugenol methyl chloride solution, which is then added dropwise to the paste A under stirring to obtain eugenol salt colloid B;
100 parts of phosphorus oxychloride is dissolved in 800 to 1600 parts of methyl chloride to get phosphorus oxychloride solution, which is then slowly dropped into said eugenol salt colloid B within 2 to 4 h at 0 to 30°
C.;
the mixture continues to react for 2 to 4 h;
the organic layer is extracted by alkali metal alkali solution, followed by washing, drying and removing the solvent by rotary evaporation, successively, to get a light yellow liquid, which is bio-based phosphate flame retardant;
(2) at a temperature 20 to 30°
C., by mole basis, 100 parts of bismaleimide, 0 to 84.5 parts of 2,2′
-diallyl bisphenol A, and 1 to 75 parts of bio-based phosphate are mixed, the mixture is stirred at a constant temperature of 130 to 145°
C. to get a transparent liquid, which is then cured and post-cured to obtain a flame retarding bismaleimide resin.
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Accused Products
Abstract
Disclosed are a flame-retardant bismaleimide resin and a preparation method thereof comprising: forming an eugenol salt suspensoid from a whole biomass eugenol in the present of a strong alkali metal base, adding dropwisely a solution of phosphorus oxychloride in methyl chloride to react to obtain a biomass-based phosphate flame-retardant; mixing bismaleimide, 2,2′-diallylbisphenol with the obtained phosphate, curing and posttreating to obtain the flame-retardant bismaleimide resin. Compared with petroleum-based bismaleimide resin, the flame-retardant bismaleimide resin prepared by the present invention is obtained from eugenol derived from biomass, and the raw material is green and renewable. It maintains mechanical properties and processing properties of the petroleum-based bismaleimide resin and has an excellent flame-retardant property. The preparation method provided by the invention has the advantages of low cost and simple production process, and has wide application prospect in the fields of aerospace, electronic information, electrical insulation and the like.
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Citations
5 Claims
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1. A preparation method of flame retardant bismaleimide resin, characterizing in comprising the following steps:
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(1) at a temperature of 0.5 to 4.5°
C., by mole basis, 300 to 400 parts of alkali metal alkali and 180 to 280 parts of water are uniformly mixed to obtain a paste A;
300 to 400 parts of eugenol is dissolved in 1500 to 2600 parts of methyl chloride to obtain a eugenol methyl chloride solution, which is then added dropwise to the paste A under stirring to obtain eugenol salt colloid B;
100 parts of phosphorus oxychloride is dissolved in 800 to 1600 parts of methyl chloride to get phosphorus oxychloride solution, which is then slowly dropped into said eugenol salt colloid B within 2 to 4 h at 0 to 30°
C.;
the mixture continues to react for 2 to 4 h;
the organic layer is extracted by alkali metal alkali solution, followed by washing, drying and removing the solvent by rotary evaporation, successively, to get a light yellow liquid, which is bio-based phosphate flame retardant;(2) at a temperature 20 to 30°
C., by mole basis, 100 parts of bismaleimide, 0 to 84.5 parts of 2,2′
-diallyl bisphenol A, and 1 to 75 parts of bio-based phosphate are mixed, the mixture is stirred at a constant temperature of 130 to 145°
C. to get a transparent liquid, which is then cured and post-cured to obtain a flame retarding bismaleimide resin. - View Dependent Claims (2, 3, 4, 5)
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Specification
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- Resources
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Current AssigneeSoochow University (Jiangsu Education Department)
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Original AssigneeSoochow University (Jiangsu Education Department)
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InventorsGU, Aijuan, MIAO, Jiatao, LIANG, Guozheng, YUAN, Li
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Granted Patent
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Time in Patent OfficeDays
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Field of Search
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US Class Current
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CPC Class CodesC08F 222/404 substituted imides comprisi...C08G 73/10 Polyimides; Polyester-imide...C09K 21/14 Macromolecular materials
