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Flame-retardant bismaleimide resin and preparation method thereof

A technology of maleimide resin and bismaleimide, which is applied to flame retardant bismaleimide resin and its preparation, and the field of flame retardant resin, can solve the problem of poor workability, hyperbranched polysiloxane problems such as poor storage stability of alkane, to achieve the effects of rich raw material sources, good storage stability and good processability

Active Publication Date: 2015-02-18
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese invention patent (CN 101974226A) discloses a flame-retardant bismaleimide resin with hyperbranched polysiloxane as a modifier and its preparation method. Due to the poor storage stability of the hyperbranched polysiloxane used , easy to gel, there is a problem of poor manufacturability in the preparation process of modified resin

Method used

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  • Flame-retardant bismaleimide resin and preparation method thereof
  • Flame-retardant bismaleimide resin and preparation method thereof
  • Flame-retardant bismaleimide resin and preparation method thereof

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Embodiment 1

[0035] 1. Synthesis of halogen-free, phosphorus-free and silicon-containing flame retardants

[0036] in N 2 Under protection, 5.19g of maleic anhydride was dissolved in 100mL of toluene to form solution A; 11.7g of γ-aminopropyltriethoxysilane was added dropwise to the toluene solution within 30min, and then reacted at room temperature for 0.5h ( hours), forming solution B.

[0037] Add 7.2g of anhydrous zinc chloride to solution B, and after the temperature reaches 80°C, add 8.52g of hexamethyldisilazane dropwise within 30 minutes. After the dropwise addition, react at 80°C for 4h, filter, and distill under reduced pressure to obtain solution C.

[0038] Add solution C, 1.14g deionized water and 0.01g tetramethylammonium hydroxide to ethanol, and reflux at a constant temperature of 55°C for 3h. After the reaction was completed, the halogen-free, phosphorus-free and silicon-containing flame retardant was obtained by distillation under reduced pressure and vacuum drying. Th...

Embodiment 2

[0049] 1. Synthesis of halogen-free, phosphorus-free and silicon-containing flame retardants

[0050] in N 2 Under protection, 5.88g of maleic anhydride was dissolved in 100mL of toluene to form solution A; 13.3g of γ-aminopropyltriethoxysilane was added dropwise to the toluene solution within 20min, and then reacted at room temperature for 1h (hour) , forming solution B.

[0051] Add 8.2g of anhydrous zinc chloride to solution B, and after the temperature reaches 70°C, add 9.2g of hexamethyldisilazane dropwise within 30min. After the dropwise addition, react at 80°C for 4h, filter, and distill under reduced pressure to obtain solution C.

[0052] Add solution C and 1.4g deionized water into ethanol (adjust pH=10 with NaOH), and reflux at constant temperature at 55°C for 4h. After the reaction was completed, the halogen-free, phosphorus-free and silicon-containing flame retardant was obtained by distillation under reduced pressure and vacuum drying. The number average molec...

Embodiment 3

[0057] 1. Synthesis of halogen-free, phosphorus-free and silicon-containing flame retardants

[0058] in N 2 Under protection, 15.8g of maleic anhydride was dissolved in 250mL of toluene to form solution A; a mixture of 15.1g of γ-aminopropyltriethoxysilane and 20g of γ-aminopropyltrimethoxysilane was added dropwise within 30min Toluene solution, and then react at room temperature for 0.5h (hour), forming solution B.

[0059] Add 21.6g of anhydrous zinc chloride to solution B, and after the temperature reaches 70°C, add 25.56g of hexamethyldisilazane dropwise within 25 minutes. After the dropwise addition, react at 70°C for 5h, filter, and distill under reduced pressure to obtain solution C.

[0060] Add solution C, 3.4g deionized water and 0.05g tetramethylammonium hydroxide into methanol, and reflux at 55°C for 4h. After the reaction was completed, the halogen-free, phosphorus-free and silicon-containing flame retardant was obtained by distillation under reduced pressure ...

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Abstract

The invention discloses a flame-retardant bismaleimide resin and a preparation method thereof. The flame-retardant bismaleimide resin is prepared by the following steps: stirring 100 weight parts of bismaleimide, 0-80 weight parts of diallyl phenyl compounds and10-50 weight parts of a halogen-free non-phosphorus silicon-containing flame retardant under the temperature condition of 120-150DEG C to form a transparent liquid. The halogen-free non-phosphorus silicon-containing flame retardant is poly-maleimide hyperbranched silicon resin with the branching degree of 0.5-0.6 and the molecular weight of 2500-3400. The flame-retardant bismaleimide resin not only has excellent flame retardance performance, but also the mechanical performance can be greatly improved, in addition, the flame-retardant bismaleimide resin also maintains the excellent heat resistance, and can be used as a high-performance resin matrix, an adhesive, insulating paint and the like, and has wide application prospects in the fields of aerospace, electronic information, electrical insulation and the like.

Description

technical field [0001] The invention relates to a flame-retardant resin, in particular to a flame-retardant bismaleimide resin and a preparation method thereof, belonging to the technical field of polymer materials. Background technique [0002] Bismaleimide resin (BMI) is a representative of typical heat-resistant thermosetting resins. It has a wide range of applications in aerospace, electronic information, and electrical insulation. Due to its three-dimensional network and highly cross-linked structure, its impact resistance and The crack resistance is poor, so the modification of bismaleimide resin is mainly toughening. However, compared with inorganic materials and metal materials, polymer materials are flammable. For many applications in cutting-edge fields, flammability has become a "bottleneck" restricting its application. Although the homopolymer of BMI will emit CO with certain self-extinguishing property when burning 2 , but it is far from meeting the flame reta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G73/10C08G77/26C08G77/06C08L79/08
Inventor 顾嫒娟蒋志俊梁国正袁莉
Owner SUZHOU UNIV
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