Highlight flame-retardant polypropylene composite material and preparation method thereof

Abstract

The invention belongs to the technical field of preparation of organic composite materials, and particularly discloses a high-gloss flame-retardant polypropylene composite material and a preparation method thereof. The high-gloss flame-retardant polypropylene composite material is prepared from the following components in percentage by mass: 60 to 90 weight percent of polypropylene, 10 to 13 weight percent of octabromoS ether, 5 to 8 weight percent of antimony trioxide, 5 to 10 weight percent of DOPO, 0 to 1 weight percent of antioxidant, 0 to 2 weight percent of lubricant and 0 to 1 weight percent of flexibilizer. The flame retardance, the toughness and the glossiness of the highlight flame-retardant polypropylene composite material obtained by adding DOPO are greatly improved.

Description

Technical Field

[0001] The invention belongs to the technical field of preparation of organic composite materials, and particularly relates to a high-gloss flame-retardant polypropylene composite material and a preparation method thereof. Background Art

[0002] Polypropylene (PP) is an extremely important polymer material. It is non-toxic and harmless, very friendly to the environment and human health. Its low density means that it will not bring too much burden to the product during use, and its light weight provides great convenience for transportation and installation. In terms of mechanical properties, polypropylene performs well, has high strength and toughness, and can withstand certain pressure and impact. Its excellent electrical insulation performance has made it widely used in the electronics field, ensuring the safe operation of electronic equipment. At the same time, it also has excellent chemical resistance and can resist the erosion of various chemicals. It plays an important role in the fields of construction, textiles, decoration, machinery, etc. However, polypropylene is a flammable material. When it burns, it will release toxic and corrosive gases and a large amount of smoke, which not only poses a serious threat to people's life safety, but also causes huge losses to property. Therefore, how to make polypropylene materials flame retardant has become a crucial research topic.

[0003] At present, the commonly used flame retardants on the market are mainly halogen-free flame retardants. Although this flame retardant can play a flame retardant role to a certain extent, the addition amount is large, and it must reach more than 20% to have a significant flame retardant effect. Such a high addition amount will have an adverse effect on the performance of polymer materials, and the surface appearance is relatively poor, and obvious bright spots will appear, affecting the aesthetics of the product. Flame retardants based on decabromodiphenylethane and antimony trioxide generally need to add mineral fillers to achieve flame retardant effects. If it is pure polypropylene, the addition amount needs to reach 30%. Although the appearance of the product made with this flame retardant is improved compared with halogen-free flame retardants, it still cannot achieve a high-gloss effect and cannot meet the needs of some products with high requirements for appearance. Flame retardants based on octabromo-S ether and antimony trioxide can achieve a high-gloss effect on the appearance of the product, but the flame retardant performance is unstable and cannot reach the flame retardant level of V0. Especially after adding copolymers, the material can only reach the V2 level, which is far from meeting some application scenarios with high requirements for flame retardant performance.

[0004] Therefore, it is very necessary to develop a flame retardant that can effectively improve the flame retardant properties of polypropylene materials while maintaining good material properties and appearance. Summary of the invention

[0005] The purpose of the present invention is to overcome the defects of the prior art and provide a high-gloss flame-retardant polypropylene composite material and a preparation method thereof.

[0006] In order to achieve the above objectives, one of the technical solutions of the present invention is: a high-gloss flame-retardant polypropylene composite material, the composition of which includes, by mass percentage:

[0007] Polypropylene 60-90wt%

[0008] Octabromo-S-ether 10-13wt%

[0009] Antimony trioxide 5-8wt%

[0010] DOPO 5-10wt%

[0011] Antioxidant 0-1wt%

[0012] Lubricant 0-2wt%

[0013] Toughening agent 0-1wt%.

[0014] DOPO is a new flame retardant intermediate. Its structure contains PH bonds, which are extremely active to olefins, epoxy bonds and carbonyl groups, and can react to form many derivatives. DOPO and its derivatives contain biphenyl rings and phenanthrene ring structures in their molecular structures, especially the side phosphorus groups are introduced in the form of cyclic O=PO bonds, which have higher thermal and chemical stability than general, non-annulated organic phosphates and better flame retardant properties. DOPO and its derivatives can be used as reactive and additive flame retardants. The synthesized flame retardants are halogen-free, smoke-free, non-toxic, non-migrating, and have long-lasting flame retardant properties.

[0015] In a preferred embodiment of the present invention, the polypropylene comprises homopolypropylene and copolymer polypropylene, and the mass ratio of the homopolypropylene to the copolymer polypropylene is 60-75:0-15.

[0016] Further preferably, the homopolypropylene includes but is not limited to Y26, M17 and the like, and the copolymer polypropylene includes but is not limited to EP548R, K8009, K8003 and the like.

[0017] In a preferred embodiment of the present invention, the antioxidant comprises a primary antioxidant and a secondary antioxidant.

[0018] Further preferably, the primary antioxidant is at least one of 1010, 1076, 1098 and AO-80, and the secondary antioxidant is at least one of 168, PEP-8, PEP-6 and HP-10.

[0019] In a preferred embodiment of the present invention, the lubricant is at least one of EBS, PE wax, calcium stearate, zinc stearate and magnesium stearate.

[0020] In a preferred embodiment of the present invention, the toughening agent is at least one of the POP series or the POE series.

[0021] Further preferably, the toughening agent is at least one of POP 6202, POP8605L, and POE 8150.

[0022] In order to achieve the above objectives, the second technical solution of the present invention is: a method for preparing a high-gloss flame-retardant polypropylene composite material, comprising the following steps: weighing the raw materials according to the mass percentage composition ratio, stirring the raw materials evenly, and then using a twin-screw to perform blending, modification and granulation.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The addition of DOPO in the present invention greatly improves the flame retardancy, toughness and glossiness of the material. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is described in more detail below in conjunction with specific embodiments, but the protection scope of the present invention is not limited to these embodiments.

[0026] A high-gloss flame-retardant polypropylene composite material, comprising, by mass percentage:

[0027] Polypropylene 60-90wt%

[0028] Octabromo-S-ether 10-13wt%

[0029] Antimony trioxide 5-8wt%

[0030] DOPO 5-10wt%

[0031] Antioxidant 0-1wt%

[0032] Lubricant 0-2wt%

[0033] Toughening agent 0-1wt%.

[0034] The polypropylene includes homopolypropylene and copolymer polypropylene, and the mass ratio of the homopolypropylene to the copolymer polypropylene is 60-75:0-15.

[0035] The homopolypropylene includes but is not limited to Y26, M17 and the like, and the copolymer polypropylene includes but is not limited to EP548R, K8009, K8003 and the like.

[0036] The antioxidant includes a primary antioxidant and a secondary antioxidant.

[0037] The primary antioxidant is at least one of 1010, 1076, 1098 and AO-80, and the secondary antioxidant is at least one of 168, PEP-8, PEP-6 and HP-10.

[0038] The lubricant is at least one of EBS, PE wax, calcium stearate, zinc stearate and magnesium stearate.

[0039] The toughening agent is at least one of the POP series or the POE series, such as POP 6202, POP8605L, and POE8150.

[0040] A method for preparing a high-gloss flame-retardant polypropylene composite material comprises the following steps: weighing raw materials according to a mass percentage composition ratio, stirring the raw materials uniformly, and then using a twin-screw extruder for blending, modification and granulation.

[0041] Example 1

[0042] A high-gloss flame-retardant polypropylene composite material, the composition ratio of which is shown in Table 1, wherein the mass fraction ratio of homopolymer PP to copolymer PP in PP is 68:10. Raw materials are weighed according to the mass percentage composition ratio, and after the raw materials are uniformly stirred, they are blended, modified and granulated using a twin-screw.

[0043] The tensile strength, flexural strength, flexural modulus, notched impact strength and flame retardant grade of the prepared high-gloss flame-retardant polypropylene composite material were measured, and the results are shown in Table 2.

[0044] Example 2

[0045] A high-gloss flame-retardant polypropylene composite material, the composition ratio of which is shown in Table 1, wherein the mass fraction ratio of homopolymer PP to copolymer PP in PP is 65:10. Raw materials are weighed according to the mass percentage composition ratio, and after the raw materials are uniformly stirred, they are blended, modified and granulated using a twin-screw.

[0046] The tensile strength, flexural strength, flexural modulus, notched impact strength and flame retardant grade of the prepared high-gloss flame-retardant polypropylene composite material were measured, and the results are shown in Table 2.

[0047] Example 3

[0048] A high-gloss flame-retardant polypropylene composite material, the composition ratio of which is shown in Table 1, wherein the mass fraction ratio of homopolymer PP to copolymer PP in PP is 64:10. The raw materials are weighed according to the mass percentage composition ratio, and after the raw materials are evenly stirred, they are blended, modified and granulated using a twin-screw.

[0049] The tensile strength, flexural strength, flexural modulus, notched impact strength and flame retardant grade of the prepared high-gloss flame-retardant polypropylene composite material were measured, and the results are shown in Table 2.

[0050] Comparative Example 1

[0051] A polypropylene composite material, the composition ratio of which is shown in Table 1, wherein the mass fraction ratio of homopolymer PP to copolymer PP in PP is 73:10. Raw materials are weighed according to the mass percentage composition ratio, and after the raw materials are uniformly stirred, they are blended, modified and granulated using a twin screw.

[0052] The tensile strength, flexural strength, flexural modulus, notched impact strength and flame retardant grade of the prepared polypropylene composite material were measured. The results are shown in Table 2.

[0053] Comparative Example 2

[0054] A polypropylene composite material, the composition ratio of which is shown in Table 1, wherein the mass fraction ratio of homopolymer PP to copolymer PP in PP is 71:10. Raw materials are weighed according to the mass percentage composition ratio, and after the raw materials are uniformly stirred, they are blended, modified and granulated using a twin screw.

[0055] The tensile strength, flexural strength, flexural modulus, notched impact strength and flame retardant grade of the prepared polypropylene composite material were measured. The results are shown in Table 2.

[0056] Comparative Example 3

[0057] A polypropylene composite material, whose composition ratio is shown in Table 1, wherein the mass ratio of homopolymer PP to copolymer PP in PP is 70:10. The raw materials are weighed according to the mass percentage composition ratio, and after the raw materials are evenly stirred, they are blended, modified and granulated using a twin-screw.

[0058] The tensile strength, flexural strength, flexural modulus, notched impact strength and flame retardant grade of the prepared polypropylene composite material were measured. The results are shown in Table 2.

[0059] Table 1 Composition ratio of Examples 1-3 and Comparative Examples 1-3

[0060]

[0061] Table 2 Performance test results of polypropylene composite materials obtained in Examples 1-3 and Comparative Examples 1-3

[0062]

[0063] From the test results in Table 2, it can be seen that after adding DOPO, the flame retardant performance of the material is stable, there is no dripping ignition phenomenon, and the toughness and glossiness of the material are improved.

[0064] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some or all of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A high gloss flame retardant polypropylene composite material, characterized in that: Its composition by mass percentage includes:

2. The high gloss flame-retardant polypropylene composite material according to claim 1, characterized in that: The polypropylene includes homopolypropylene and copolymer polypropylene, and the mass ratio of the homopolypropylene to the copolymer polypropylene is 60-75:0-15.

3. The high gloss flame-retardant polypropylene composite material according to claim 2, characterized in that: The homopolypropylene includes but is not limited to Y26 and M17, and the copolymer polypropylene includes but is not limited to EP548R, K8009 and K8003.

4. The high gloss flame-retardant polypropylene composite material according to claim 1, characterized in that: The antioxidants include primary antioxidants and secondary antioxidants.

5. The high gloss flame-retardant polypropylene composite material according to claim 4, characterized in that: The primary antioxidant is at least one of 1010, 1076, 1098 and AO-80.

6. The high gloss flame-retardant polypropylene composite material according to claim 4, characterized in that: The auxiliary antioxidant is at least one of 168, PEP-8, PEP-6 and HP-10.

7. The high gloss flame-retardant polypropylene composite material according to claim 1, characterized in that: The lubricant is at least one of EBS, PE wax, calcium stearate, zinc stearate and magnesium stearate.

8. The high gloss flame-retardant polypropylene composite material according to claim 1, characterized in that: The toughening agent is at least one of the POP series or the POE series.

9. The high gloss flame-retardant polypropylene composite material according to claim 8, characterized in that: The toughening agent is at least one of POP6202, POP8605L and POE 8150.

10. The method for preparing the high gloss flame-retardant polypropylene composite material according to any one of claims 1 to 9, characterized in that: The method comprises the following steps: weighing raw materials according to the mass percentage composition ratio, stirring the raw materials evenly, and then using a twin-screw extruder to perform blending, modification and granulation.

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