Copolymerized resin of aromatic nitrile-based special resin containing benzoxazine ring and benzoxazine resin and its industrial preparation method

Abstract

The invention discloses an aromatic nitrile-based special resin containing a benzoxazine ring and an industrial preparation method thereof. It is obtained by pre-opening the aromatic nitrile-based special resin containing a benzoxazine ring in a solvent, and then co-polymerizing it with a benzoxazine resin of the corresponding structure; wherein: the aromatic nitrile group containing a benzoxazine ring Special resin: 50-95 parts; benzoxazine resin: 5-50 parts; solvent: 100-300 parts. The invention adopts solvent copolymerization reaction at normal pressure, the production conditions are easy to realize, and the production process is easy to control. The aromatic nitrile-based special resin containing benzoxazine ring is used for copolymerization with benzoxazine resin, and both resins contain benzoxazine. ring, compatible in molecular structure, to obtain aromatic nitrile-based special resin and benzoxazine resin copolymer resin containing benzoxazine ring, integrating the excellent performance of aromatic nitrile-based special resin and the excellent processing performance of benzoxazine resin In one; after the copolymerization, the solvent can be recycled, which is safe and environmentally friendly.

Description

technical field

[0001] The invention belongs to the technical field of polymer composite materials, and in particular relates to an aromatic nitrile-based special resin containing a benzoxazine ring and a benzoxazine resin copolymerized resin and an industrial preparation method thereof. Background technique

[0002] Aromatic nitrile-based special resin is a new type of high-temperature-resistant resin. Its molecular structure contains rigid nitrile groups. On the one hand, the nitrile group endows it with excellent comprehensive properties, such as high strength, high modulus, high temperature resistance, and Corrosion, self-flame retardancy, etc., make its comprehensive performance comparable to that of polyimide, and some properties even exceed polyimide; on the other hand, the molecular structure contains rigid nitrile groups, which leads to its high melting point and high viscosity. Curing is slow. Therefore, high temperature and long time are required to complete curi...

Examples

Embodiment 1

[0028] Example 1: Add 95kg bisphenol A aromatic nitrile-based special resin containing benzoxazine ring and 100kg N'N dimethylacetamide into the reaction kettle, stir and mix evenly, and perform ring-opening reaction in advance according to the following conditions: Temperature: 150°C; Time: 30min; Stirring speed: 300r / min; Pressure: normal pressure. Next, lower the temperature of the reactor, add 5kg of bisphenol A benzoxazine resin, and carry out the copolymerization reaction according to the following conditions: temperature: 140°C; time: 30min; stirring speed: 400r / min; pressure: normal pressure. Then, the N'N dimethylacetamide is distilled clean, discharged and pulverized to obtain a bisphenol A type aromatic nitrile-based special resin / bisphenol A type benzoxazine resin copolymer resin powder containing a benzoxazine ring.

Embodiment 2

[0029] Example 2: Add 90kg of bisphenol A-type aromatic nitrile-based special resin containing benzoxazine rings and 100kg of N'N dimethylacetamide into the reaction kettle, stir and mix evenly, and perform ring-opening reaction in advance according to the following conditions: Temperature: 160°C; Time: 60min; Stirring speed: 250r / min; Pressure: normal pressure. Next, lower the temperature of the reactor, add 10kg of bisphenol A benzoxazine resin, and carry out the copolymerization reaction according to the following conditions: temperature: 120°C; time: 30min; stirring speed: 250r / min; pressure: normal pressure. Then, the N'N dimethylacetamide is distilled clean, discharged and pulverized to obtain a bisphenol A type aromatic nitrile-based special resin / bisphenol A type benzoxazine resin copolymer resin powder containing a benzoxazine ring.

Embodiment 3

[0030] Example 3: Add 80kg of bisphenol A-type aromatic nitrile-based special resin containing benzoxazine ring and 150kg of N'N dimethylacetamide into the reaction kettle, stir and mix evenly, and perform ring-opening reaction in advance according to the following conditions : Temperature: 170°C; Time: 90min; Stirring speed: 200r / min; Pressure: normal pressure. Next, lower the temperature of the reactor, add a measured amount of bisphenol A benzoxazine resin, and carry out the copolymerization reaction according to the following conditions: temperature: 130°C; time: 120min; stirring speed: 350r / min; pressure: normal pressure. Then, the N'N dimethylacetamide is distilled clean, discharged and pulverized to obtain a bisphenol A type aromatic nitrile-based special resin / bisphenol A type benzoxazine resin copolymer resin powder containing a benzoxazine ring.

technical field

[0001] The invention belongs to the technical field of polymer composite materials, and in particular relates to an aromatic nitrile-based special resin containing a benzoxazine ring and a benzoxazine resin copolymerized resin and an industrial preparation method thereof. Background technique

[0002] Aromatic nitrile-based special resin is a new type of high-temperature-resistant resin. Its molecular structure contains rigid nitrile groups. On the one hand, the nitrile group endows it with excellent comprehensive properties, such as high strength, high modulus, high temperature resistance, and Corrosion, self-flame retardancy, etc., make its comprehensive performance comparable to that of polyimide, and some properties even exceed polyimide; on the other hand, the molecular structure contains rigid nitrile groups, which leads to its high melting point and high viscosity. Curing is slow. Therefore, high temperature and long time are required to complete curi...

Examples

Embodiment 1

[0028] Example 1: Add 95kg bisphenol A aromatic nitrile-based special resin containing benzoxazine ring and 100kg N'N dimethylacetamide into the reaction kettle, stir and mix evenly, and perform ring-opening reaction in advance according to the following conditions: Temperature: 150°C; Time: 30min; Stirring speed: 300r / min; Pressure: normal pressure. Next, lower the temperature of the reactor, add 5kg of bisphenol A benzoxazine resin, and carry out the copolymerization reaction according to the following conditions: temperature: 140°C; time: 30min; stirring speed: 400r / min; pressure: normal pressure. Then, the N'N dimethylacetamide is distilled clean, discharged and pulverized to obtain a bisphenol A type aromatic nitrile-based special resin / bisphenol A type benzoxazine resin copolymer resin powder containing a benzoxazine ring.

Embodiment 2

[0029] Example 2: Add 90kg of bisphenol A-type aromatic nitrile-based special resin containing benzoxazine rings and 100kg of N'N dimethylacetamide into the reaction kettle, stir and mix evenly, and perform ring-opening reaction in advance according to the following conditions: Temperature: 160°C; Time: 60min; Stirring speed: 250r / min; Pressure: normal pressure. Next, lower the temperature of the reactor, add 10kg of bisphenol A benzoxazine resin, and carry out the copolymerization reaction according to the following conditions: temperature: 120°C; time: 30min; stirring speed: 250r / min; pressure: normal pressure. Then, the N'N dimethylacetamide is distilled clean, discharged and pulverized to obtain a bisphenol A type aromatic nitrile-based special resin / bisphenol A type benzoxazine resin copolymer resin powder containing a benzoxazine ring.

Embodiment 3

[0030] Example 3: Add 80kg of bisphenol A-type aromatic nitrile-based special resin containing benzoxazine ring and 150kg of N'N dimethylacetamide into the reaction kettle, stir and mix evenly, and perform ring-opening reaction in advance according to the following conditions : Temperature: 170°C; Time: 90min; Stirring speed: 200r / min; Pressure: normal pressure. Next, lower the temperature of the reactor, add a measured amount of bisphenol A benzoxazine resin, and carry out the copolymerization reaction according to the following conditions: temperature: 130°C; time: 120min; stirring speed: 350r / min; pressure: normal pressure. Then, the N'N dimethylacetamide is distilled clean, discharged and pulverized to obtain a bisphenol A type aromatic nitrile-based special resin / bisphenol A type benzoxazine resin copolymer resin powder containing a benzoxazine ring.

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