阅读说明：本技术 一种超高比重的无卤阻燃聚丙烯材料及其制备方法 (Halogen-free flame-retardant polypropylene material with ultrahigh specific gravity and preparation method thereof ) 是由 王浩 杨敏 雷春堂 郅慧 莫荣强 于 2019-11-14 设计创作，主要内容包括：本发明公开了一种超高比重的无卤阻燃聚丙烯材料及其制备方法,该材料的原料按重量份计为：聚丙烯10～50份；氧化锌30～80份；滑石粉5～30份；玻璃纤维25～35份；膨胀型无卤阻燃剂5～20份；相容剂1～8份；色母0～6份；润滑剂0.1～1份；抗氧剂0.1～0.8份；通过按配方配置材料混合后经双螺杆挤出机挤出得到了阻燃效果优良、超高比重、无卤素阻燃聚丙烯材料。本发明利用氧化锌、滑石粉、玻璃纤维很好的调节了聚丙烯树脂的比重；通过这三种无机材料与无卤阻燃剂共同复配的协同作用形成了材料优良的环保阻燃效果；并大大降低了阻燃剂的使用,有效节约了原材料的成本。(The invention discloses a halogen-free flame-retardant polypropylene material with ultrahigh specific gravity and a preparation method thereof, wherein the material comprises the following raw materials in parts by weight: 10-50 parts of polypropylene; 30-80 parts of zinc oxide; 5-30 parts of talcum powder; 25-35 parts of glass fiber; 5-20 parts of an intumescent halogen-free flame retardant; 1-8 parts of a compatilizer; 0-6 parts of color master batch; 0.1-1 part of a lubricant; 0.1-0.8 part of antioxidant; the halogen-free flame-retardant polypropylene material with excellent flame-retardant effect and ultrahigh specific gravity is obtained by mixing the materials according to the formula and then extruding the mixture by a double-screw extruder. The invention utilizes zinc oxide, talcum powder and glass fiber to well adjust the specific gravity of the polypropylene resin; the excellent environment-friendly flame retardant effect of the material is formed by the combined synergistic effect of the three inorganic materials and the halogen-free flame retardant; greatly reduces the use of flame retardant and effectively saves the cost of raw materials.)

1. The halogen-free flame-retardant polypropylene material with ultrahigh specific gravity is characterized by comprising the following components in parts by mass:

2. the halogen-free flame retardant polypropylene material with ultra high specific gravity as claimed in claim 1, wherein the halogen-free flame retardant polypropylene material comprises the following components in parts by mass:

3. the halogen-free flame retardant polypropylene material with ultra high specific gravity as claimed in claim 1 or 2, wherein the polypropylene resin is a copolymer with high impact resistance, and the fluidity is 9-15 g/10 min; the Vicat softening point is 140-155 ℃; the notch impact strength of the alloy is 30-50 KJ/m at the normal temperature of 23 DEG C²。

4. The halogen-free flame retardant polypropylene material with ultra high specific gravity as claimed in claim 1 or 2, wherein the intumescent halogen-free flame retardant is a halogen-free nitrogen phosphorus flame retardant MY-0113.

5. The halogen-free flame retardant polypropylene material with ultra high specific gravity as claimed in claim 1 or 2, wherein the compatibilizer is maleic anhydride grafted polyolefin copolymer.

6. The halogen-free flame retardant polypropylene material with ultra high specific gravity according to claim 1 or 2, wherein the lubricant is alkyl aryl modified silicone oil modified by organic functional groups.

7. The halogen-free flame retardant polypropylene material with ultra high specific gravity according to claim 1 or 2, wherein the glass fiber is chopped glass fiber.

8. The halogen-free flame retardant polypropylene material with ultra high specific gravity as claimed in claim 1 or 2, wherein the antioxidant is 1010/168 compound, and the ratio is 1: 1.

9. The halogen-free flame-retardant polypropylene material with ultra-high specific gravity according to claim 1 or 2, wherein the zinc oxide is zinc oxide with purity of 99.5%.

10. The preparation method of the halogen-free flame retardant polypropylene material with ultrahigh specific gravity according to any one of claims 1 to 9, characterized by comprising the following steps:

1) when the polypropylene fiber is used, the polypropylene raw material, the compatilizer, the color master and the glass fiber are sequentially placed into a high-speed mixer according to a formula, then the lubricant is added, and the mixture is mixed in the high-speed mixer at a high speed for 2-5 min; sequentially adding the intumescent halogen-free flame retardant, the zinc oxide, the antioxidant and the talcum powder, then stirring at a high speed for 2-5 min, then switching to low-speed stirring for 2-5 min, and then discharging at a low speed;

2) and extruding and granulating the mixture by using a double-screw extruder, wherein the heating temperature is 180-200 ℃, and the head temperature is 200-230 ℃. The rotating speed of the main machine is 30-40 r/min.

Technical Field

The invention relates to the technical field of high polymer plastics, in particular to a halogen-free flame-retardant polypropylene material with ultrahigh specific gravity and a preparation method thereof.

Background

Polypropylene is a very common kind of general plastic, is widely used in daily life, is thermoplastic synthetic resin with excellent performance, is colorless and semitransparent thermoplastic light general plastic, and has chemical resistance, heat resistance, electrical insulation, high-strength mechanical property, good high-wear-resistance processing property and the like, so that the polypropylene is rapidly and widely applied to various fields such as machinery, automobiles, electronic appliances, buildings, textiles, packaging, agriculture, forestry, fishery, food industry and the like since the coming out of the world. The polypropylene raw material is a flammable material, while the traditional flame-retardant polypropylene material is prepared from a halogen-containing flame retardant, smoke generated in the case of fire is harmful to human bodies, the amount of the conventional halogen-free flame retardant used in polypropylene resin is large, the cost of the raw material is high, and the development of the low-cost halogen-free flame-retardant material is particularly important. In addition, with the improvement of the national living standard, the requirements of people on the material quality of products in life are higher and higher, the traditional polypropylene material product is a material with light weight and poor texture, and the texture of the polypropylene material is greatly improved by modifying polypropylene plastics and filling weight.

Polypropylene resins, also known as PP resins, are polymers of propylene addition polymerization, and because of their plasticity, polypropylene materials are gradually replacing wooden products, and the mechanical functions of metals have been gradually replaced by high strength, toughness and wear resistance. Zinc oxide is an oxide of zinc, is insoluble in water, is soluble in acid and strong base, is a common chemical additive, is widely applied to plastics, and is used as a reinforcing agent and an active agent, and also used as a coloring agent and a filling agent of white glue. The talcum powder is mainly composed of hydrous magnesium silicate, and can reduce molding shrinkage, enhance flexural modulus and increase specific gravity of polypropylene material by adding the talcum powder into polypropylene. The glass fiber reinforced polypropylene material is widely applied to automobiles, household appliances and the like, and can improve the impact resistance, reduce the shrinkage rate and increase the rigidity of polypropylene. The intumescent halogen-free flame retardant (IFR) is a composite flame retardant mainly composed of nitrogen and phosphorus, does not contain halogen, does not adopt antimony oxide as a synergist, foams and expands when being heated, and is an environment-friendly flame retardant with high efficiency and low toxicity. By compounding and using the zinc oxide, the talcum powder, the glass fiber and the intumescent halogen-free flame retardant in the polypropylene resin, the specific gravity of the material is greatly improved, the texture of the material is enhanced, the flame retardant effect of the polypropylene material is improved, the using amount of the flame retardant is reduced, the cost of the material is reduced, the halogen-free flame retardant polypropylene material with ultrahigh specific gravity is obtained, and the halogen-free flame retardant polypropylene material and the high-specific-gravity polypropylene material have wider application prospects.

CN 107573588 proposes a reinforced halogen-free weather-resistant polypropylene material and a preparation method thereof, CN105111583 proposes a halogen-free flame-retardant polypropylene micro-foaming material and a preparation method thereof, and CN 110229415 proposes a flame retardant continuous glass fiber reinforced polypropylene prepreg tape material and a preparation method thereof; the above disclosures do not mention the preparation method of the halogen-free flame retardant polypropylene material with ultrahigh specific gravity, and the following disadvantages exist in different degrees:

the flame retardant has the advantages of large usage amount, high material cost, high selling price, small audience and is not beneficial to popularization and promotion of the flame retardant material;

the injection micro-foaming technology can lead the product to be light, the specific gravity of the material is light, and the injection micro-foaming material is not suitable for the field with requirements on weight and texture.

Disclosure of Invention

The invention aims to solve the problems and provide a halogen-free flame-retardant polypropylene material with ultrahigh specific gravity and a preparation method thereof, wherein the polypropylene resin is used as a base material, and zinc oxide, talcum powder, glass fiber and a halogen-free flame retardant are added to be compounded together to form an excellent environment-friendly flame-retardant effect of the material, and the mechanical property of the material is met; and achieve the purpose of increasing the weight and texture; the compound addition of the zinc oxide, the talcum powder and the glass fiber greatly reduces the use amount of the flame retardant, effectively reduces the cost, and improves the flame retardance and the strength of the material by adding the inorganic substances; the added lubricant can effectively reduce friction force and improve the glossiness of the product; the material prepared by the method has the characteristics of ultrahigh specific gravity, good flame retardant effect, low cost, environmental protection and the like, and can meet the requirements of weight texture and halogen-free flame retardant products.

The invention realizes the purpose through the following technical scheme:

the halogen-free flame-retardant polypropylene material with the ultrahigh specific gravity comprises the following components in parts by mass:

the halogen-free flame-retardant polypropylene material with the ultrahigh specific gravity comprises the following components in parts by mass:

the polypropylene resin is a high impact-resistant copolymer, and the fluidity of the polypropylene resin is 9-15 g/10 min; the Vicat softening point is 140-155 ℃; the notch impact strength is 30-50 KJ/m2 at the normal temperature of 23 ℃.

The further scheme is that the intumescent halogen-free flame retardant is a halogen-free nitrogen-phosphorus flame retardant MY-0113.

Further, the compatilizer is maleic anhydride grafted polyolefin copolymer.

The further scheme is that the lubricant is alkyl aryl modified silicone oil modified by organic functional groups.

In a further scheme, the glass fiber is chopped glass fiber.

The further proposal is that the antioxidant is 1010/168 compound, and the proportion is 1: 1.

In a further scheme, the zinc oxide is zinc oxide with the purity of 99.5 percent.

The invention also provides a preparation method of the halogen-free flame-retardant polypropylene material with ultrahigh specific gravity, which comprises the following steps:

1) when the polypropylene fiber is used, the polypropylene raw material, the compatilizer, the color master and the glass fiber are sequentially placed into a high-speed mixer according to a formula, then the lubricant is added, and the mixture is mixed in the high-speed mixer at a high speed for 2-5 min; sequentially adding the intumescent halogen-free flame retardant, the zinc oxide, the antioxidant and the talcum powder, then stirring at a high speed for 2-5 min, then switching to low-speed stirring for 2-5 min, and then discharging at a low speed;

2) and extruding and granulating the mixture by using a double-screw extruder, wherein the heating temperature is 180-200 ℃, and the head temperature is 200-230 ℃. The rotating speed of the main machine is 30-40 r/min.

The invention has the beneficial effects that:

the invention reasonably adjusts the flame retardant property and physical property of the halogen-free flame retardant polypropylene material, and the zinc oxide, the talcum powder, the glass fiber and the intumescent halogen-free flame retardant are compounded and used in the polypropylene resin, thereby improving the specific gravity of the material, leading the weight and texture effects of the material to be strong, simultaneously greatly reducing the use of the flame retardant, effectively saving the cost of the raw materials and being beneficial to the popularization of the flame retardant material. The lubricant is added, so that the material has good lubricity, the surface tension is reduced, the friction is reduced, the glossiness is enhanced, the scratch resistance of the material is enhanced, and the prepared ultrahigh-specific-gravity flame-retardant polypropylene material can meet the special requirements of products. The addition of antioxidants retards or inhibits the progress of the polymer oxidation process, thereby preventing polymer aging and extending its useful life.

The excellent environment-friendly flame retardant effect of the material is formed by the combined synergistic effect of the three inorganic materials and the halogen-free flame retardant; the use of the flame retardant is greatly reduced, and the cost of raw materials is effectively saved; the application of the halogen-free flame retardant enables the material to be more environment-friendly and safer; when encountering fire, the toxicity is greatly reduced compared with halogen-containing flame-retardant materials; the halogen-free flame-retardant plastic has the advantages of low cost, ultrahigh specific gravity, no halogen, flame retardance, easiness in processing and production and the like, and can meet the use requirements of product appearance.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.