KR100855796B1 - Propylene composition with flame retardant and abrasion resistance - Google Patents

Abstract

The present invention relates to a flame retardant polypropylene resin composition having wear resistance. The flame-retardant polypropylene resin composition having abrasion resistance provided in the present invention is magnesium hydroxide or aluminum hydroxide based on 100 parts by weight of the base resin consisting of 30 to 90% by weight of polypropylene copolymer resin and 10 to 70% by weight of polyolefin alpha copolymer resin. 20 to 200 parts by weight of phosphorus inorganic flame retardant; And 0.1 to 10 parts by weight of one or more other additives selected from antioxidants, processing aids, copper antioxidants and halogenated scavangers. According to the present invention, although the inorganic flame retardant is included to express flame retardancy, even if a change in the composition for improving wear resistance is eliminated or reduced whitening phenomenon without a decrease in moldability or mechanical properties, significantly improved wear resistance It can be expressed, there is an advantage that can be used for strong industrial cables.

Polypropylene, Flame Retardant, Modified, Polyolefin, Surface Treatment, Additives

Description

Propylene composition with flame retardant and abrasion resistance}

The present invention relates to a flame-retardant polypropylene resin composition having abrasion resistance, more specifically, a resin blended with a polypropylene copolymer resin and a polyolefin alpha copolymer resin as a base resin, by adding an appropriate inorganic flame retardant, suppressing whitening phenomenon It relates to a flame-retardant polypropylene resin composition that can be, but also wear resistance.

Conventionally, a large amount of magnesium hydroxide or an inorganic filler was added to a polypropylene resin in order to prepare a resin composition having high flame retardancy, but the composite resin thus prepared significantly lowered moldability and mechanical properties, and required a certain tensile strength or elongation. There was a limit to the application to the wire.

In order to solve this conventional problem, a method of adding an elastomer portion to the matrix resin composition has been proposed, and a method of introducing a polar group into the elastomer portion for the purpose of wrapping the elastomer portion of the inorganic flame retardant to solve the whitening phenomenon has also been proposed. There is a bar. However, by polarizing the elastomer part, there is a problem in mechanical properties, and the whitening phenomenon was not sufficiently improved, and it did not contribute to securing wear resistance.

The development of a polypropylene resin composition for producing a product having flame retardancy, strong wear resistance, and strong physical properties such that whitening is hardly generated is a problem that has not yet been solved in the related industry. Efforts have been made to this day, and the present invention has been made under such a technical background.

The technical problem to be achieved based on the above-mentioned conventional problems is to develop a polypropylene composite resin composition that can minimize the whitening phenomenon while ensuring the wear resistance in the flame-retardant polypropylene resin composition, achieving the technical problem It is an object of the present invention to provide a flame retardant polypropylene resin composition having abrasion resistance.

One of the wear-resistant flame retardant polypropylene resin compositions provided by the present invention for achieving the technical problem to be achieved by the present invention, 30 to 90% by weight polypropylene copolymer resin, 10 to 70% by weight polyolefin alpha copolymer resin 20 to 200 parts by weight of an inorganic flame retardant which is magnesium hydroxide or aluminum hydroxide, based on 100 parts by weight of the base resin; And 0.1 to 10 parts by weight of one or two or more other additives selected from antioxidants, processing aids, copper antioxidants and halogen scavangers.

Another aspect of the wear-resistant flame retardant polypropylene resin composition provided in the present invention for achieving the technical problem to be achieved by the present invention, 30 to 89% by weight of polypropylene copolymer resin, 10 to 69% by weight of polyolefin alpha copolymer resin, And 20 to 200 parts by weight of an inorganic flame retardant, which is magnesium hydroxide or aluminum hydroxide, based on 100 parts by weight of the base resin including 1 to 20% by weight of a modified polypropylene resin. And 0.1 to 10 parts by weight of one or more other additives selected from antioxidants, processing aids, copper antioxidants and halogenated scavangers. At this time, the modified polypropylene constituting the base resin is preferably a polypropylene resin grafted with one or two or more polar group-containing compounds selected from maleic anhydride, silane, and fatty acid.

In the flame-retardant polypropylene resin composition having the above-mentioned wear resistance, the polypropylene copolymer resin constituting the base resin is homopolymer polypropylene, random copolymer polypropylene, and block polymer poly It is preferable in the case of any one or two or more polypropylene resins selected from propylene, and the polyolefin alpha copolymer resin constituting the base resin is preferably a propylene-α-olefin copolymer resin, and the propylene-α-olefin copolymer resin is poly It is more preferable if it is one or two or more copolymer resins selected from propylene-octene and polypropylene-butene, and the inorganic flame retardant is a pure inorganic flame retardant which is not surface treated or a material selected from vinylsilane, aminosilane, stearic acid and a polymer. Surface-treated weapon When the flame retardant is preferred.

Hereinafter, specific examples will be described in order to help the understanding of the present invention, and in the following case, with reference to the drawings will be described in more detail. However, embodiments according to the present invention can be modified in many different forms, and the scope of the present invention should not be construed as being limited to the embodiments described below. Embodiments of the present invention are provided to more completely explain the present invention to those skilled in the art.

One of the wear-resistant flame retardant polypropylene resin compositions according to the present invention is a base resin blended with a polypropylene copolymer resin and a polyolefin alpha copolymer resin, an inorganic flame retardant which is magnesium hydroxide or aluminum hydroxide, and an antioxidant, a processing aid, a copper acid It comprises one or two or more other additives selected from antioxidants and halogenated scavangers.

Another flame-retardant polypropylene resin composition having abrasion resistance according to the present invention is a base resin consisting of polypropylene copolymer resin, polyolefin alpha copolymer resin, and modified polypropylene resin, an inorganic flame retardant which is magnesium hydroxide or aluminum hydroxide, and an antioxidant, And one or more other additives selected from processing aids, copper antioxidants and halogenated scavangers. At this time, the modified polypropylene constituting the base resin is preferably a polypropylene resin grafted with one or two or more polar group-containing compounds selected from maleic anhydride, silane and fatty acid.

Regarding the numerical range of the content of the polypropylene copolymer resin constituting the base resin, if it is lower than the lower limit, the heat resistance is lowered, which is undesirable. If the upper limit is exceeded, the flame retardancy and flexibility are lowered, and the whitening phenomenon is severe, which is undesirable. . The polypropylene copolymer resin constituting the base resin is any one or two or more polypropylene resins selected from homo polymer polypropylene, random copolymer polypropylene, and block polymer polypropylene. It is preferable if it is. Various types of polypropylene may be used as the polypropylene resin, but random polypropylene is most preferable when the purpose of reducing or removing whitening phenomenon is strong.

On the other hand, in order to improve the mechanical properties such as tensile strength and elongation of the polypropylene copolymer resin and the whitening phenomenon, the base resin was prepared by blending the polyolefin alpha copolymer resin. Regarding the numerical range of the content of the polyolefin alpha copolymer resin, if it falls below the lower limit, elongation and filler loady resistance and cold resistance decrease, and the whitening phenomenon increases, which is undesirable. Strength, harness resistance, abrasion resistance, and the like decrease, which is undesirable. The polypropylene alpha copolymer resin is preferably a propylene-α-olefin copolymer, and the propylene-α-olefin copolymer is more preferably a copolymer of one or two or more selected from polypropylene-octane and polypropylene-butene. . It is apparent that this is selected in consideration of compatibility with the polypropylene resin used as the base resin.

Regarding the numerical range for the content of magnesium hydroxide or aluminum hydroxide used as the inorganic flame retardant, if it is below the lower limit, the flame retardancy decreases, and if it exceeds the upper limit, the mechanical properties decrease, which is undesirable. The inorganic flame retardant in which the magnesium hydroxide or aluminum hydroxide is used may be directly used in a pure state without any treatment on the surface thereof, and may be surface treated as any one selected from vinylsilane, aminosilane, stearic acid and a polymer. Can be used.

In Examples 1-1 to 1-4 in Table 1, the base resin is blended into two components (A + B), and in Examples 2-1 to 2-4, the base resin is divided into three components ( A + B + C) is set separately when blending, the comparative example is set as an example in contrast to the above embodiment, prepared according to the composition and content of each composition and knead it to the composition corresponding to each example Was prepared.

division Example 1-1 1-2 1-3 1-4 2-1 2-2 2-3 2-4 A 30 50 70 90 30 47.5 65 70 B 70 50 30 10 69 47.5 25 10 C - - - - One 5 10 20 D 150 150 150 150 150 150 150 150 E 3 3 3 3 3 3 3 3

division Comparative example 1-1 1-2 2-1 2-2 2-3 A 20 95 100 50 70 B 80 5 - - - F - - - 50 30 D 150 150 150 150 150 E 3 3 3 3 3

In Tables 1 and 2, the component represented by A is a polypropylene random copolymer resin, which is a polypropylene copolymer resin, and a trade name R724J of LG-Caltex (Korea) is used, and the component represented by B is a polyethylene that is a polyolefin alpha copolymer resin. As alpha propylene, Mitsui Chemical Co., Ltd. (Tafmer) was used, and the component indicated with D was magnesium hydroxide, an inorganic flame retardant, and Albemarlesa (Germany), Magnifin H5 (Magnifin H5). The component denoted by E was used for other additives such as antioxidants.

In Table 1, a component represented by C was used as a modified polypropylene, a material under the trade name CM1120 of Honam Petrochemical Co., Ltd., and a component represented by F in Table 2 was a polyolefin elastomer resin, which was a trade name in cage of DuPont Dow Elastomers (USA). 8150 (Engage 8150) was used.

Each test specimen was prepared using each of the compositions having the compositions of Examples and Comparative Examples according to Tables 1 and 2, and then measured for tensile properties, bleaching and wear resistance at bending deformation. 3 is shown respectively.

Tensile properties were measured in accordance with ASTM D 638 to measure the tensile strength and elongation using a universal testing machine. The measurement of the whitening phenomenon at the time of bending deformation was visually determined whether the whitening phenomenon occurred when the bending deformation was applied under the conditions of a resin thickness of 1 mm and a radius of curvature of 5 mm in the case of the actual wire insulation material. In order to evaluate the same conditions, each composition was prepared by extrusion molding a specimen having a thickness of 1 mm, and then a cylindrical specimen having a diameter of 2 mm was prepared under a bending radius of 5 mm to produce a whitening phenomenon at the same radius of curvature. The occurrence of was observed visually. Wear resistance is a needle scraper test.The weight of 710g was placed on a needle of 0.45sq, and the wear thickness was measured after reciprocating 300 times on a sample having a width of 2 mm × thickness 1 mm × 100 mm. .

division Example Comparative example 1-1 1-2 1-3 1-4 2-1 2-2 2-3 2-4 1-1 1-2 2-1 2-2 2-3 Tensile Strength (Mpa) 11 15 22 28 12 18 24 28 8 32 38 8 10 % Elongation 1000 800 500 170 950 680 340 150 1300 90 70 400 100 Whitening phenomenon none none slightly slightly none none slightly slightly none plenty Very many plenty plenty Abrasion Resistance (μm) 47 18 5 One 41 12 4 One 58 One 0 31 19

As can be seen from Table 3, in the case of the embodiment, the whitening phenomenon slightly occurred or did not occur, but in the other comparative examples except the case of Comparative Example 1-1, the whitening phenomenon occurred, in particular, Comparative Example 2-1 In the case of, it was confirmed that the occurrence of bleaching phenomenon was very large. Therefore, it can be seen that the comparative example is more susceptible to bending deformation than the example. When the measurement standard value of abrasion resistance is 50 micrometers or less, it is evaluated that it is considered to be suitable. In the case of the comparative example 1-1, despite the advantage that a whitening phenomenon does not appear, abrasion resistance is the lowest and it is especially weak to the abrasion resistance exceeding a threshold You can check it.

Optimal embodiments of the present invention described above have been disclosed. Although specific terms have been used herein, they are used only for the purpose of describing the present invention in detail to those skilled in the art, and are not used to limit the scope of the present invention as defined in the meaning or claims.

According to the present invention, an inorganic flame retardant is included to express flame retardancy, but even when the composition for improving wear resistance is changed, the whitening phenomenon is eliminated or reduced without a decrease in moldability or mechanical properties, and the wear resistance is significantly improved. It can express the advantage that can be used for strong industrial wires durable.

Claims (7)

To 100 parts by weight of the base resin consisting of 30 to 90% by weight polypropylene copolymer resin and 10 to 70% by weight polyolefin alpha copolymer resin, 20 to 200 parts by weight of an inorganic flame retardant which is magnesium hydroxide or aluminum hydroxide; And Flame retardant polypropylene resin composition having abrasion resistance, characterized in that it comprises; 0.1 to 10 parts by weight of one or two or more other additives selected from antioxidants, processing aids, copper antioxidants and halogen scavangers. To 100 parts by weight of the base resin consisting of 30 to 89% by weight polypropylene copolymer resin, 10 to 69% by weight polyolefin alpha copolymer resin, and 1 to 20% by weight modified polypropylene resin, 20 to 200 parts by weight of an inorganic flame retardant which is magnesium hydroxide or aluminum hydroxide; And Flame retardant polypropylene resin composition having abrasion resistance, characterized in that it comprises; 0.1 to 10 parts by weight of one or two or more other additives selected from antioxidants, processing aids, copper antioxidants and halogen scavangers. The method according to claim 1 or 2, Polypropylene copolymer resin constituting the base resin, any one or two or more polypropylene-based selected from homo polymer (polypropylene), random copolymer (random copolymer) polypropylene and block polymer (block polymer) polypropylene A flame retardant polypropylene resin composition having abrasion resistance, which is a resin. The method according to claim 1 or 2, The polyolefin alpha copolymer resin constituting the base resin is a propylene-α-olefin copolymer resin, characterized in that the flame-retardant polypropylene resin composition having abrasion resistance. The method of claim 4, wherein The propylene-α-olefin copolymer resin is a flame-retardant polypropylene resin composition having abrasion resistance, characterized in that one or two or more copolymer resins selected from polypropylene-octene and polypropylene-butene. The method according to claim 1 or 2, The inorganic flame retardant is a flame-retardant polypropylene resin composition having abrasion resistance, characterized in that the pure inorganic flame retardant untreated, or an inorganic flame retardant in the surface treated state of any one selected from vinylsilane, aminosilane, stearic acid and polymer. The method of claim 2, The modified polypropylene constituting the base resin is a polypropylene resin grafted with one or two or more polar group-containing compounds selected from maleic anhydride, silane, and fatty acids.