High-skid-resistance modified PO composite material and preparation method thereof

Abstract

The invention relates to the field of high polymer materials, and discloses a high-skid-resistance modified PO composite material which comprises the following components in parts by weight: 60-80 parts of a PO matrix; filler: 15 to 25 parts of talcum powder; an anti-skid modifier: 1-3 parts of a siloxane polymer; an elastomer modifier: 10 to 25 parts of a hydrogenated styrene-butadiene-styrene block copolymer SEBS; a lubricant: 2-4 parts of polyolefin synthetic oil; a fluorination reinforcing agent: 5-8 parts of fluorine-containing dihydric alcohol; and a compatilizer: 2-5 parts of maleic anhydride grafted polyolefin. According to the invention, the synergistic effect of the fluorinated reinforcing agent, the siloxane polymer and the lubricant is introduced, and the rigid support of the talcum powder is combined, so that a multi-scale antiskid network is constructed, the performance bottleneck of the PO material in a dynamic friction scene is solved, and a novel material scheme is provided for application in the fields of automobile parts, industrial pipelines and the like.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of high polymer materials, and particularly relates to a high anti-skid modified PO composite material and a preparation method thereof. BACKGROUND

[0002] Polyolefin (PO) materials (such as polypropylene and polyethylene) are widely used in industrial fields due to their lightweight, chemical corrosion resistance, and easy processing. However, the PO material has a low surface energy and a high friction coefficient, and is prone to wear and skidding in a dynamic friction scene (such as a mechanical part or a pipeline inner wall), which limits its application in high anti-skid demand scenarios.

[0003] In the prior art, the wear resistance of the PO material can be partially improved by adding fillers (such as talc and calcium carbonate) or lubricants (such as silicone oil and EVA), but the anti-skid performance is limitedly improved, and there are still problems of surface stickiness or wear under low temperature or high load conditions. SUMMARY

[0004] The technical problem to be solved by the present application is to overcome the above technical defects, and to provide a high anti-skid modified PO composite material and a preparation method thereof.

[0005] In order to solve the above problems, the technical scheme of the present application is as follows: a high anti-skid modified PO composite material comprises the following components by weight:

[0006] PO matrix: 60-80 parts; filler: talc 15-25 parts; anti-skid modifier: siloxane polymer 1-3 parts; elastomer modifier: hydrogenated styrene-butadiene-styrene block copolymer SEBS 10-25 parts; lubricant: polyolefin synthetic oil 2-4 parts; fluorinated reinforcing agent: fluorine-containing diol 5-8 parts; compatibilizer: maleic anhydride grafted polyolefin 2-5 parts.

[0007] Further, the PO matrix is a copolymerized polypropylene or a high-density polyethylene.

[0008] Further, the talc is surface-modified by stearic acid, and the particle size is less than or equal to 5 microns.

[0009] Further, the fluorine-containing diol is 1,1,2,2-tetrafluoro-1,2-ethanediol.

[0010] A preparation method of a high anti-skid modified PO composite material comprises the following steps:

[0011] S1, talc and stearic acid are mixed at a ratio of 100:1, and surface modification is performed by stirring at 80 DEG C for 30 minutes;

[0012] S2, PO base, anti-skid modifier, elastomer modifier and compatibilizer are weighed according to the proportion, added into a high-speed mixer, mixed at a speed of 800-1200 rpm for 5-10 min to ensure preliminary dispersion;

[0013] S3, modified talc, polyolefin synthetic oil and fluorine-containing diol are added and continue to mix until uniform, temperature is 60℃ or lower;

[0014] S4, the mixed material is added into a twin-screw extruder, melt blended at 180-220℃, screw speed is 200-400 rpm, after melt blending, extruded and granulated;

[0015] S5, after drying, the granules are formed into high anti-skid modified PO composite products by injection molding or extrusion molding.

[0016] Compared with the prior art, the application has the advantages that: the application introduces the synergistic effect of fluorinated reinforcing agent, siloxane polymer and lubricant, combined with the rigid support of talc, to build a multi-scale anti-skid network, solve the performance bottleneck of PO material in the dynamic friction scene, and provide a new material scheme for the application of automobile parts, industrial pipelines and the like. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the application will be described below in a clear and complete manner. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the application.

[0018] A high anti-skid modified PO composite material comprises the following components by weight:

[0019] Copolymerized polypropylene 70 parts, talc 20 parts, siloxane polymer 2 parts, hydrogenated styrene-butadiene-styrene block copolymer SEBS 20 parts, polyolefin synthetic oil 3 parts, fluorine-containing diol 5 parts, and maleic anhydride grafted polyolefin 4 parts.

[0020] S1, talc and stearic acid are mixed in a ratio of 100:1, and surface modification is carried out by stirring at 80℃ for 30 minutes;

[0021] S2, PO base, anti-skid modifier, elastomer modifier and compatibilizer are weighed according to the proportion, added into a high-speed mixer, mixed at a speed of 800-1200 rpm for 5-10 min to ensure preliminary dispersion;

[0022] S3, modified talc, polyolefin synthetic oil and fluorine-containing diol are added and continue to mix until uniform, temperature is 60℃ or lower;

[0023] S4, the mixture is added to a twin-screw extruder, melt blended at 220 DEG C, screw rotation speed 350 rpm, after melt blending, extrusion granulation is carried out;

[0024] S5, the granules are dried, and then injection molded into the required high anti-slip modified PO composite product.

[0025] The PO composite product is tested, and the test results are as follows:

[0026] The static friction coefficient is 0.47, the dynamic friction coefficient is 0.28, the tensile strength is 28 MPa, and the impact strength is 12 kJ / m 2 .

[0027] The present application solves the performance bottleneck of PO materials in the dynamic friction scene by introducing the synergistic effect of fluorinated reinforcing agents, siloxane polymers and lubricants, and the rigid support of talc powder, and constructs a multi-scale anti-slip network, providing a new material scheme for the application of automobile parts, industrial pipelines and the like.

[0028] The undisclosed parts in the present application are all prior art, and the specific structure and working principle will not be described again.

[0029] It should be noted that, in this text, relational terms such as first and second are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between the entities or operations. Moreover, the terms "include", "contain" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment.

[0030] Although embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and alterations can be made thereto without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

[0031] The present application and its embodiments have been described above, and this description is not restrictive, and if those skilled in the art are inspired by it, without departing from the purpose of the present application, similar structural modes and embodiments can be designed without creative design, which should belong to the protection scope of the present application.

Claims

1. A highly anti-slip modified PO composite material, characterized in that: The composition comprises the following components in parts by weight: PO matrix: 60-80 parts; filler: talc powder 15-25 parts; anti-slip modifier: siloxane polymer 1-3 parts; elastomer modifier: hydrogenated styrene-butadiene-styrene block copolymer SEBS 10-25 parts; Lubricant: 2-4 parts of polyolefin synthetic oil; Fluorinated enhancer: 5-8 parts of fluorinated diol; Compatibilizer: 2-5 parts of maleic anhydride grafted polyolefin.

2. The highly anti-slip modified PO composite material according to claim 1, characterized in that: The PO matrix is ​​copolymerized polypropylene or high-density polyethylene.

3. The highly anti-slip modified PO composite material according to claim 1, characterized in that: The talc powder is surface-modified with stearic acid and has a particle size of ≤5 μm.

4. The highly anti-slip modified PO composite material according to claim 1, characterized in that: The fluorine-containing diol is 1,1,2,2-tetrafluoro-1,2-ethylene glycol.

5. The method for preparing a highly anti-slip modified PO composite material according to any one of claims 1 to 4, characterized in that: The following steps are involved: S1. Mix talc and stearic acid in a ratio of 100:1 and stir at 80°C for 30 minutes for surface modification; S2. Weigh the PO matrix, anti-slip modifier, elastomer modifier and compatibilizer in proportion, add them to a high-speed mixer, and mix them at 800-1200 rpm for 5-10 minutes to ensure initial dispersion; S3. Add modified talc, polyolefin synthetic oil, and fluorinated diol, and continue mixing until uniform, with the temperature ≤ 60°C; S4. Add the mixed material into a twin-screw extruder, melt-blend at 180-220° C., with a screw speed of 200-400 rpm, and extrude into granules after melt-blending; S5. After the pellets are dried, they are molded into the desired high-slip resistant modified PO composite material products by injection molding or extrusion.