CN113388202B

CN113388202B - High-gloss modified PP material and preparation method thereof

Info

Publication number: CN113388202B
Application number: CN202110729005.8A
Authority: CN
Inventors: 陶元坤; 石磊
Original assignee: Shanghai Aizhen New Material Co ltd
Current assignee: Shanghai Aizhen New Material Co ltd
Priority date: 2021-06-29
Filing date: 2021-06-29
Publication date: 2022-11-01
Anticipated expiration: 2041-06-29
Also published as: CN113388202A

Abstract

The application relates to the technical field of modified plastics, and particularly discloses a high-gloss modified PP material and a preparation method thereof. The material is prepared from the following raw materials in parts by weight: 60-80 parts of PP; 30-40 parts of PMMA; 0.8-1.5 parts of a compatilizer; 0.5-0.7 part of antioxidant; 0.5-1 part of a dispersant; 0.5-0.6 part of light stabilizer; 1.2-1.8 parts of pearl powder; 0.3-0.6 part of a fluorescent assistant; the dispersing agent is a compound composition of sodium methylene dinaphthalene sulfonate and ammonium polymethacrylate; the preparation method comprises the following steps: putting PP, PMMA and a compatilizer into a blender, blending for 8min at the temperature of 170-180 ℃ at the rotating speed of 150-160r/min, putting an antioxidant, a dispersant, a light stabilizer, pearl powder and a fluorescent auxiliary agent into the blender for 3-4 times, stirring and blending for 10min at the rotating speed of 240-250r/min, and extruding and granulating to obtain the modified PP material. The modified PP material can be used for automobile shells and household appliance shells and has the advantage of high gloss.

Description

High-gloss modified PP material and preparation method thereof

Technical Field

The application relates to the technical field of modified plastics, in particular to a high-gloss modified PP material and a preparation method thereof.

Background

Polypropylene (PP) is a nontoxic and tasteless highly crystalline polymer with a regular structure and a density of only 0.91g/cm²The high-density light-weight polyurethane resin is one of the lightest-density engineering plastics and is widely applied to the fields of automobiles, household appliances and the like. The polypropylene material has high surface gloss and good processing formability, and is gradually applied to the field of the spraying-free material, but the PP material has the problems of poor low-temperature impact resistance, easy aging, lower surface gloss than ABS, PMMA and PC materials and the like due to the influence of the molecular structure of the PP material, so that the application of the PP plastic to the field of the spraying-free material is limited.

Polymethyl methacrylate (PMMA) is a transparent material, the relative molecular weight is about 200 ten thousand, molecular chains are very soft, the glossiness is high, and after PMMA and PP are mixed, the integral glossiness and hardness can be remarkably improved, however, PMMA and PP are incompatible phases, a system formed by simply blending PMMA and PP is unstable, and dispersed phases can form different phase forms. The Chinese invention patent with application number 2017114686208 discloses a PP/PMMA alloy material, and modified talcum powder is used as a compatilizer, so that the limit of PP and PMMA becomes fuzzy, and the shrinkage rate of the material is reduced. However, the prepared composite material has a glossiness of only about 80, and the glossiness of the composite material is insufficient when the composite material is used on an automobile shell, so that the glossiness of the composite material is difficult to highlight.

Disclosure of Invention

In order to obtain a PP/PMMA composite material with high glossiness, which can be applied to an automobile shell, the application provides a high-glossiness modified PP material and a preparation method thereof.

In a first aspect, the present application provides a high gloss modified PP material, which adopts the following technical scheme:

the high-gloss modified PP material is prepared from the following raw materials in parts by weight:

the dispersing agent is a compound composition of sodium methylene dinaphthalene sulfonate and ammonium polymethacrylate.

By adopting the technical scheme, the compatilizer is added after the PP and the PMMA are mixed, and the compatilizer can obscure the boundary of the PP and the PMMA, so that the PP and the PMMA are mutually blended, and the mixing stability and the uniformity of the PP and PMMA blended phase are improved; after the antioxidant and the light stabilizer are added, the oxidation resistance and the light aging resistance of the material can be improved; the dispersing agent can improve the dispersion uniformity of the pearl powder and the fluorescent auxiliary agent in a blending system, and the fluorescent auxiliary agent can be attached to the pearl powder, so that the surface glossiness of the product is improved, and the fluorescent effect is not easy to occur at night due to the trace addition of the fluorescent auxiliary agent; the dispersing agent is formed by compounding and combining sodium methylene dinaphthalene sulfonate and ammonium polymethacrylate, can promote the fluorescent auxiliary agent to be attached to the pearl powder, can promote the dispersion of the pearl powder, and can reduce the occurrence of agglomeration and deposition.

Preferably, the compatilizer is an inorganic mineral with methacryloxy groups.

Preferably, the antioxidant is antioxidant 1010.

Preferably, the mixing ratio of the sodium methylene dinaphthalene sulfonate to the ammonium polymethacrylate in parts by weight is (0.3-0.6): (0.2-0.4).

By adopting the technical scheme, when the weight ratio of the methylene dinaphthalene sodium sulfonate to the ammonium polymethacrylate is (0.3-0.6): (0.2 to 0.4), the dispersing effect on the fluorescent auxiliary and the pearl powder is the best, and the surface gloss of the obtained product is the best.

Preferably, the light stabilizer is an antioxidant 168.

Preferably, the mesh number of the pearl powder is 5000-10000 meshes.

Preferably, the fluorescent auxiliary agent is fluorescent powder, and the mesh number of the fluorescent powder is 7000-10000 meshes.

In a second aspect, the present application provides a preparation method of a high-gloss modified PP material, which adopts the following technical scheme:

a preparation method of a high-gloss modified PP material comprises the following steps: putting PP, PMMA and a compatilizer into a blender, blending for 8min at the temperature of 170-180 ℃ at the rotating speed of 150-160r/min, putting an antioxidant, a dispersing agent, a light stabilizer, pearl powder and a fluorescent assistant into the blender for 3-4 times, stirring and blending for 10min at the rotating speed of 240-250r/min, and extruding and granulating to obtain the modified PP material.

In summary, the present application has the following beneficial effects:

1. the polypropylene (PP) material is added with the pearl powder and a trace amount of fluorescent auxiliary agent, the fluorescent auxiliary agent can be attached to the pearl powder, the surface glossiness of a product is improved, and the fluorescent effect of the product is not easy to appear at night due to the trace amount of the fluorescent auxiliary agent.

2. In the application, the dispersing agent is a compound composition of sodium methylene dinaphthalene sulfonate and ammonium polymethacrylate, and when the weight ratio of the sodium methylene dinaphthalene sulfonate to the ammonium polymethacrylate is (0.3-0.6): (0.2 to 0.4), the dispersing effect on the fluorescent auxiliary and the pearl powder is the best, and the surface gloss of the obtained product is the best.

Detailed Description

The present application will be described in further detail with reference to examples and comparative examples.

Examples

Examples 1 to 5

The raw materials of the high gloss modified PP materials in examples 1 to 5 in each weight part are shown in Table 1.

TABLE 1 EXAMPLES 1-5 the high gloss modified PP materials in each raw material weight part

In examples 1 to 5, the compatibilizing agent used was an inorganic mineral having a methacryloxy group; the antioxidant used is antioxidant 1010; the light stabilizer used is antioxidant 168; the mesh number of the pearl powder is 5000-10000 meshes; the used fluorescent auxiliary agent is fluorescent powder, and the mesh number of the fluorescent powder is 7000-10000 meshes.

In examples 1 to 5, the preparation method of the high gloss modified PP material includes the following steps: putting PP, PMMA and a compatilizer into a blender, blending for 8min at the temperature of 170-180 ℃ at the rotating speed of 150-160r/min, putting an antioxidant, a dispersing agent, a light stabilizer, pearl powder and a fluorescent assistant into the blender for 3-4 times, stirring and blending for 10min at the rotating speed of 240-250r/min, and extruding and granulating to obtain the modified PP material.

Comparative example

Comparative examples 1 to 3

The raw materials of the high gloss modified PP materials in the comparative examples 1 to 3 in each weight part are shown in Table 2.

TABLE 2 COMPARATIVE EXAMPLES 1-3 HIGH GLOSS MODIFIED PP MATERIAL WITH VARIABLE MATERIAL

In the present comparative examples 1 to 3, the compatibilizing agent used was an inorganic mineral having methacryloyloxy groups; the antioxidant used is antioxidant 1010; the light stabilizer is antioxidant 168; the mesh number of the pearl powder is 5000-10000 meshes; the used fluorescent auxiliary agent is fluorescent powder, and the mesh number of the fluorescent powder is 7000-10000 meshes.

In comparative examples 1 to 3, the preparation method of the high gloss modified PP material comprises the following steps: putting PP, PMMA and a compatilizer into a blender, blending for 8min at the temperature of 170-180 ℃ at the rotating speed of 150-160r/min, putting an antioxidant, a dispersant, a light stabilizer, pearl powder and a fluorescent auxiliary agent into the blender for 3-4 times, stirring and blending for 10min at the rotating speed of 240-250r/min, and extruding and granulating to obtain the modified PP material.

Performance test

Detection method

The high gloss modified PP materials of examples 1 to 5 and comparative examples 1 to 3 were injection molded into test pieces having a length × width of 1m × 1m and a thickness of 3mm, and the surface of the test piece was subjected to a gloss measurement using a general-purpose 60 ° specular gloss measurement apparatus, and the surface of the test piece was subjected to a gloss measurement using ASTM D2457-13, and 10 test points were uniformly selected on the surface of the test piece to measure the gloss thereof, and the average gloss was calculated, and the measurement results are shown in table 3.

TABLE 3 measurement of surface gloss of high gloss modified PP materials in examples 1 to 5 and comparative examples 1 to 3

	Surface average gloss/(60%
		Example 1	94.47
Example 2	94.49
		Example 3	94.50
Example 4	92.62
		Example 5	92.96
Comparative example 1	87.35
		Comparative example 2	91.64
Comparative example 3	91.89

In combination with examples 1-5, and in combination with Table 3, it can be seen that the high gloss modified PP material of the present application has a high surface gloss.

Combining examples 1-3 and examples 4-5, and table 3, it can be seen that when the weight ratio of sodium methylene dinaphthalene sulfonate to ammonium polymethacrylate in the dispersant is not (0.3-0.6): (0.2-0.4), too much of either sodium methylenedinaphthalene sulfonate or ammonium polymethacrylate can result in uneven dispersion of the fluorescent auxiliary and reduced surface gloss.

Combining examples 1-3 and comparative example 1, and combining table 3, it can be seen that the addition of the fluorescence assistant to the raw materials can significantly improve the glossiness of the surface of the product.

It can be seen from the combination of examples 1 to 3 and comparative examples 1 to 2, and from Table 3 that when the dispersant is used singly with either of sodium methylenedinaphthalene sulfonate and ammonium polymethacrylate, the dispersing performance of the fluorescent aid and the pearl powder is lowered, and the glossiness of the surface of the article is affected.

The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.

Claims

1. The high-gloss modified PP material is characterized by being prepared from the following raw materials in parts by weight:

60-80 parts of PP;

30-40 parts of PMMA;

0.8-1.5 parts of a compatilizer;

0.5-0.7 part of antioxidant;

0.5-1 part of a dispersant;

0.5-0.6 part of light stabilizer;

1.2-1.8 parts of pearl powder;

0.3-0.6 part of fluorescent auxiliary agent;

the dispersing agent is a compound composition of sodium methylene dinaphthalene sulfonate and ammonium polymethacrylate, and the mixing ratio of the sodium methylene dinaphthalene sulfonate to the ammonium polymethacrylate in parts by weight is (0.3-0.6): (0.2-0.4).

2. The high gloss modified PP material of claim 1, wherein: the compatilizer is an inorganic mineral with methacryloxy.

3. The high gloss modified PP material of claim 1, wherein: the antioxidant is antioxidant 1010.

4. A high gloss modified PP material according to claim 1, characterized in that: the light stabilizer is an antioxidant 168.

5. The high gloss modified PP material of claim 1, wherein: the mesh number of the pearl powder is 5000-10000 meshes.

6. The high gloss modified PP material of claim 1, wherein: the fluorescent auxiliary agent is fluorescent powder, and the mesh number of the fluorescent powder is 7000-10000 meshes.

7. A process for the preparation of a high gloss modified PP material according to any one of claims 1 to 6, comprising the steps of: putting PP, PMMA and a compatilizer into a blender, blending for 8min at the temperature of 170-180 ℃ at the rotating speed of 150-160r/min, putting an antioxidant, a dispersant, a light stabilizer, pearl powder and a fluorescent auxiliary agent into the blender for 3-4 times, stirring and blending for 10min at the rotating speed of 240-250r/min, and extruding and granulating to obtain the modified PP material.