双酚A型苯并噁嗪

一、简介

中文名称：双酚A型苯并噁嗪

英文名称：Bisphenol A-type Benzoxazine

简    称：BA-BOZ           分子式：C₂₈H₂₈N₂O₂          

物化性质：室温下呈黄色固体，外观展现形式有片状、块状、液体、粉末。熔点70℃左右，加热至120℃可以自流平，G(t)=300-800s（210℃），固化后的玻璃化转变温度Tg≥170℃，固化过程中无小分子放出。长期使用温度180-200℃，V1阻燃级别，吸水率＜0.2%，洛氏硬度120。

结 构 式：

二、技术指标

三、用途

1.覆铜板、层压板：苯并噁嗪与含磷环氧树脂复合使用，能实现N-P复合阻燃，从而实现无卤阻燃，所以被广泛应用在无卤覆铜板上；由于其优良的耐热性，也被使用在高耐热覆铜板上；同时也用于F级、H级环氧层压板上，以提高层压板的耐热性和阻燃性；

2.耐火材料：由于苯并噁嗪树脂固化无小分子放出，固化过程不释放水分，其耐热性好，特殊耐火材料上也得到了应用；

3.RTM：低粘度苯并噁嗪树脂在闭合模具中流动、浸润增强材料并固化成形，用于制备复合材料的液体成形或结构液体成形技术。

苯并噁嗪树脂RTM浇铸体、碳纤维增强苯并噁嗪树脂基复合材料和玻璃纤维增强苯并噁嗪树脂基复合材料具有优异的常温干态力学性能。70℃时, 碳纤维增强苯并噁嗪树脂基复合材料的0°拉伸强度、拉伸模量, 90°拉伸强度、拉伸模量、压缩强度、压缩模量、层间剪切强度保持率在70%以上。120℃时, 碳纤维增强苯并噁嗪树脂基复合材料的0°拉伸强度、拉伸模量, 90°拉伸强度、拉伸模量、压缩强度、压缩模量、层间剪切强度保持率在50%以上。 

4.医药化工：苯并噁嗪种类众多，部分苯并噁嗪中间体具有医药价值，受到国内外众多医药企业和研究机构的重视，不断有苯并噁嗪医药中间体问世；

5.复合材料：苯并噁嗪树脂能与环氧树脂、酚醛树脂良好复合，从而得到性能更优异的复合材料，在航空航天，汽车火车等诸多领域得到大力应用，2016-2017年，苯并噁嗪预浸料成功应用于国产大飞机C919的尾锥、辅助动力装置(APU)门、前缘面板和机腹整流罩装置；

6.绝缘材料：

电动机的绝缘等级是指其所用绝缘材料的耐热等级，分A、E、B、F、H级。允许温升是指电动机的温度与周围环境温度相比升高的限度，绝缘的温度等级A级E级B级F级H级对应的最高允许温度（℃）分别为105 120 130 155 180。苯并噁嗪由于其较高的耐热温度，适合应用于F及H级别以上的绝缘材料。 

7.摩擦材料：

苯并噁嗪树脂作为刹车和磨阻材料的粘结剂，结合金属粉末，短纤维，无机粉末高温高压压合制成。

四、用法：

苯并噁嗪树脂属于阳离子固化体系，可以与其它体系的树脂共聚，相互交联形成聚合物。

1.苯并噁嗪/环氧树脂共聚

苯并噁嗪和环氧树脂共聚，环氧树脂可以改善苯并噁嗪的脆性，苯并噁嗪则可以提高环氧树脂的耐热，模量和硬度。 

2.苯并噁嗪/酚醛树脂

苯并噁嗪可以与酚醛树脂共聚，形成交联网络结构。 

3.苯并噁嗪/双马来酰亚胺

苯并噁嗪可以与双马来酰亚胺树脂共聚，形成网络交联结构。 

4.苯并噁嗪/氰酸酯

苯并噁嗪可以与氰酸酯树脂共聚，形成网络交联结构。

Benzoxazines (Bisphenol A type)

I. Brief introduction

Chinese name: Benzoxazines (Bisphenol A type)

English name: Benzoxazines (Bisphenol A type)

Short name: BA-BOZ           Molecular Formula: C₂₈H₂₈N₂O₂

Physical and Chemical Properties: yellow solid at room temperature, the appearance of the form of flakes, lumps, liquid, powder. Melting point 70℃ , heating to 120℃ can be self-leveling, G (t) = 300-800s (210 ℃), curing glass transition temperature Tg ≥ 170℃ , no small molecules released during the curing process. Long-term use temperature 180-200℃ , V1 flame retardant grade, water absorption <0.2%, Rockwell hardness 120.

Structure  Form::

II. Technical index

III. Application

1. Copper clad laminates and laminates: benzoxazine is widely used in halogen-free copper clad laminates because it can realize N-P composite flame retardancy by compounding with phosphorus-containing epoxy resins; it is also used in high-heat-resistant copper clad laminates due to its excellent heat-resistant property; and it is also used in F-grade and H-grade epoxy laminates in order to improve the heat-resistant property and flame-retardant property of the laminates;

2. Refractory materials: due to the curing of benzoxazine resin without small molecules released, the curing process does not release moisture, its heat resistance is good, special refractory materials have also been applied;

3. RTM: Low viscosity benzoxazine resin flows, impregnates reinforcing materials and cures to shape in closed molds for the preparation of composite materials for liquid forming or structural liquid forming technology.

Benzoxazine resin RTM castables, carbon fiber reinforced benzoxazine resin matrix composites and glass fiber reinforced benzoxazine resin matrix composites have excellent mechanical properties at room temperature in the dry state.70 At℃ , the 0° tensile strength, tensile modulus, 90° tensile strength, tensile modulus, compressive strength, compressive modulus, interlaminar shear strength retention of carbon fiber reinforced benzoxazine resin matrix composites is above 70%. The retention rate of 0° tensile strength, tensile modulus, 90° tensile strength, tensile modulus, compressive strength, compressive modulus, interlaminar shear strength of carbon fiber reinforced benzoxazine resin matrix composites is above 70%.120 At℃ the retention rate of carbon fiber reinforced benzoxazine resin matrix composites is above 50%.

4. Pharmaceutical and chemical industry: There are many kinds of benzoxazines, and some benzoxazine intermediates have pharmaceutical value, which are valued by many domestic and foreign pharmaceutical enterprises and research institutions, and there are constantly benzoxazine pharmaceutical intermediates coming out;

5. Composite materials: benzoxazine resin can be well compounded with epoxy resin , phenolic resin , so as to get composite materials with better performance, which are vigorously applied in many fields such as aerospace, automobile train, etc. In 2016-2017, benzoxazine prepreg was successfully applied in the tail cone, auxiliary power unit (APU) door, leading edge panel and belly fairing device of the domestic large aircraft C919 ;

6. Insulation materials:

The of an electric motor is the heat resistance class of the insulating material used in it, which is divided into classes A, E, B, F and H. The insulation class of an electric motor is the heat resistance class of the insulating material used in it. Allowable temperature rise refers to the limit of the motor's temperature rise compared with the surrounding ambient temperature, the temperature class of insulation A class E class B class F class H class corresponds to the maximum allowable temperature (℃ ) were 105 120 130 155 180. Benzoxazine due to its higher heat-resistant temperature, is suitable for application in the F and H class and above the insulating material.

7. Friction materials:

Benzoxazine resin is used as a binder for brake and friction materials, combined with metal powder, short fiber, inorganic powder made by high temperature and high pressure compression.

IV. How to use:

Benzoxazine resin belongs to the cationic curing system, can be copolymerized with other systems of resin, crosslinked with each other to form polymers.

1. Benzoxazine / epoxy resin copolymerization

Benzoxazine and epoxy resin copolymerization, epoxy resin can improve the brittleness of benzoxazine, benzoxazine can improve the heat resistance of epoxy resin, modulus and hardness.

2. Benzoxazine/Phenolic Resin

Benzoxazine can be copolymerized with phenolic resin to form a cross-linked network structure.

3.Benzoxazine/Bismaleimide

Benzoxazine can be copolymerized with bismaleimide resin to form a network crosslinked structure.

4. Benzoxazine/Cyanate ester

Benzoxazine can copolymerize with cyanate ester resin to form a network crosslinked structure.