High-transparency flame-retardant ABS composite material and preparation method thereof

Abstract

The invention belongs to the technical field of ABS composite materials, and relates to a high-transparency flame-retardant ABS composite material and a preparation method thereof. The invention provides a high-transparency flame-retardant ABS (Acrylonitrile Butadiene Styrene) composite material which comprises the following components in parts by mass: 100 parts of transparent ABS resin, 20-40 parts of a composite flame retardant, 1-5 parts of a flame-retardant synergist, 15-30 parts of a flexibilizer and 1-3 parts of a transparent synergist. Through combination of specific flame retardants and addition of the transparent synergist, the technical problems that the toughness of the high-transparency flame-retardant ABS composite material needs to be improved due to low material performance, and the light transmittance of the high-transparency flame-retardant ABS composite material is reduced due to the fact that a flexibilizer needs to be added are solved.

Description

Technical Field

[0001] The invention belongs to the technical field of ABS composite materials and relates to a highly transparent flame-retardant ABS composite material and a preparation method thereof. Background Art

[0002] Acrylonitrile-butadiene-styrene (ABS) is a thermoplastic engineering plastic with good adaptability to temperature. It is widely used in the automotive, electrical, electronic and building materials industries. However, ABS has poor flame retardant effect, with a limiting oxygen index (LOI) of only about 19.0%. It has poor thermal stability and is easy to burn, which makes it difficult to carry out rescue when a fire occurs. Organic flame retardants [such as flame retardant oligomers (PSPTR), melamine (MA), melamine urate (MCA), hydroquinone-bis (diphenyl phosphate) polycondensate (SOL-DP), hydroquinone bis (diphenyl phosphate) (HDP), intumescent flame retardant (IFR), ethylenediamine (PDTA), diisopropylbenzene oxide (DCP), methyl benzoate (PEPB), etc.] have good flame retardant properties, which help ABS to generate a uniform carbon layer during combustion, reduce the thermal decomposition rate, and thus improve its flame retardant effect. The design principle of transparent ABS resin is to adjust the chemical structure of the material by means of blending, copolymerization, etc., while maintaining its advanced structure of microscopic phase separation, and reduce the refractive index difference between the rubber and plastic phases. This eliminates the light scattering effect and achieves transparency in the visible light region. Generally, sufficient transparency can be achieved when the difference in refractive index between the two phases is less than 0.009. In order for transparent ABS resin to meet the requirements of flame retardancy and high toughness, flame retardants and toughening agents have to be added, which makes it difficult for ABS composite materials to simultaneously meet the performance requirements of high flame retardancy, high toughness and high light transmittance. Summary of the invention

[0003] The purpose of the present invention is to solve the problem that transparent ABS resin has to add flame retardant and toughening agent to meet the requirements of flame retardancy and high toughness, which makes it difficult for ABS composite materials to meet the performance requirements of high flame retardancy, high toughness and high light transmittance at the same time. In this regard, the present invention provides a highly transparent flame retardant ABS composite material and a preparation method thereof to solve this need in the art.

[0004] On the one hand, the present invention relates to a highly transparent flame-retardant ABS composite material, wherein the raw materials for preparing the highly transparent flame-retardant ABS composite material include, by weight: 100 parts of transparent ABS resin, 20-40 parts of composite flame retardant, 1-5 parts of flame retardant synergist, 15-30 parts of toughening agent and 1-3 parts of transparent synergist; The composite flame retardant is Dow Corning DC-8008 and transparent polycarbonate flame retardant FK-2025X; The transparent synergist is N-methyldiethanolamine.

[0005] Furthermore, in the highly transparent flame-retardant ABS composite material provided by the present invention, the mass ratio of Dow Corning DC-8008 to the transparent polycarbonate flame retardant FK-2025X is 4:1 to 1:4.

[0006] Furthermore, in the highly transparent flame-retardant ABS composite material provided by the present invention, the flame-retardant synergist is selected from at least one of diphenyl isopropyl phosphate, antimony trioxide or diphenyl isodecyl phosphate.

[0007] Furthermore, in the highly transparent flame-retardant ABS composite material provided by the present invention, the toughening agent is selected from at least one of styrene-isoprene-styrene block copolymer, styrene-ethylene-butylene-styrene block copolymer, and methyl methacrylate-butadiene-styrene terpolymer.

[0008] Furthermore, in the highly transparent flame-retardant ABS composite material provided by the present invention, the transmittance of the highly transparent flame-retardant ABS composite material is 90-95%, the flame retardancy grade reaches UL94@1.6-3.2mmV-1 or above, the bending strength is not less than 60MPa, and the impact strength is not less than 15kJ / m 2 .

[0009] Furthermore, in the highly transparent flame-retardant ABS composite material provided by the present invention, the preparation raw materials also include: a nucleating agent, an antioxidant, a lubricant, a compatibilizer and a dispersant.

[0010] Furthermore, in the highly transparent flame-retardant ABS composite material provided by the present invention, the nucleating agent is a styrene-butadiene-styrene block copolymer.

[0011] Furthermore, in the highly transparent flame-retardant ABS composite material provided by the present invention, the antioxidant is dilauryl thiodipropionate.

[0012] Furthermore, in the highly transparent flame-retardant ABS composite material provided by the present invention, the lubricant is pentaerythritol stearate.

[0013] Furthermore, in the highly transparent flame-retardant ABS composite material provided by the present invention, the compatibilizer is maleic anhydride, and the dispersant is ethylene bisstearamide.

[0014] Compared with the prior art, the technical solution provided by the present invention has at least the following beneficial effects or advantages: The present invention solves the technical problem of reducing light transmittance of highly transparent flame-retardant ABS composite materials when improving flame retardancy and toughness by adding a specific flame retardant combination (Dow Corning DC-8008 and transparent polycarbonate flame retardant FK-2025X) and a transparent synergist (N-methyldiethanolamine). The prepared composite material has a light transmittance of up to 90-95%, while maintaining good flame retardant properties (flame retardant grade reaches UL94@1.6-3.2mm V-1 or above). The composite material of the present invention not only has high transparency and flame retardancy, but also exhibits good mechanical properties. Its bending strength is not less than 60MPa, and its impact strength is not less than 15kJ / m 2 , meeting the requirements of material strength and toughness in many application fields. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 This is a physical picture of the highly transparent flame-retardant ABS composite material prepared by the present invention. DETAILED DESCRIPTION

[0017] The technical scheme of the present invention is described below in conjunction with the embodiments, but the present invention is not limited to the following embodiments. The experimental methods and detection methods described in each embodiment are conventional methods unless otherwise specified; the reagents and materials can be purchased on the market unless otherwise specified. The % in the following embodiments, unless otherwise specified, are all mass percentages. The ratios in the following embodiments, unless otherwise specified, are all mass ratios.

[0018] The sources of the raw materials used in the following examples are: Transparent ABS resin, brand is CHIMEI, model is ABSPA-709H; Transparent polycarbonate flame retardant FK-2025X was purchased from Guangdong Dingxin Polymer Technology Co., Ltd.; The compatibilizer maleic anhydride, model FR-100A, was purchased from Dongguan Xingyuan Chemical Co., Ltd.

[0019] Preparation Example This preparation example provides the preparation of a highly transparent flame-retardant ABS composite material.

[0020] The preparation raw materials are taken in parts by mass: 100 parts of transparent ABS resin, 20-40 parts of composite flame retardant, 1-5 parts of diphenyl isopropyl phosphate, 15-30 parts of toughening agent, 1-3 parts of N-methyldiethanolamine, 3-6 parts of styrene-butadiene-styrene block copolymer (SBS), 1-5 parts of dilauryl thiodipropionate (DLTP), 1-3 parts of pentaerythritol stearate (PETS), 5-10 parts of maleic anhydride (MA), and 0.4-0.8 parts of ethylene bisstearamide (EBS).

[0021] Prepare a composite flame retardant, the mass ratio of Dow Corning DC-8008 and transparent polycarbonate flame retardant FK-2025X is 4:1~1:4.

[0022] A toughening agent is prepared, which is selected from at least one of styrene-isoprene-styrene block copolymer (SIS), styrene-ethylene-butylene-styrene block copolymer (SEBS), and methyl methacrylate-butadiene-styrene terpolymer (MBS).

[0023] The above-mentioned raw materials are weighed according to the ratio, and the components are put into a high-speed mixer for mixing for 30 minutes to obtain a uniform mixture. The mixture is melt-extruded and granulated through a three-stage tandem single-screw extruder to obtain a highly transparent flame-retardant ABS composite material.

[0024] Examples 1 to 4 and Comparative Examples 1 to 4 are as follows:

[0025] The high-transparency flame-retardant ABS composite materials of the above Examples 1 to 4 and Comparative Examples 1 to 4 were subjected to performance tests, and the results are shown in the following table.

[0026]

[0027] For the above tests, the test method of light transmittance refers to "Determination of light transmittance and haze of transparent plastics (GB / T 2410-2008)", the test method of flame retardancy refers to UL94 American standard, the test method of bending strength refers to "GBT9341-2000-Plastic bending performance test method", and the test method of impact strength refers to GB / T1843-1996 "Rigid Plastic Cantilever Beam Impact Test Method".

[0028] From the above test results, it can be seen that the present invention adopts N-methyldiethanolamine combined with a specific composite flame retardant to achieve a highly transparent flame retardant ABS composite material with a light transmittance of 90-95%, a flame retardant grade of UL94@1.6-3.2mmV-1 or above, a bending strength of not less than 60MPa, and an impact strength of not less than 15kJ / m 2The product requirements have been met, which has effectively solved the technical problem that the high-transparency flame-retardant ABS composite materials have low material properties and need to improve their toughness, so toughening agents must be added, resulting in a decrease in their light transmittance. Other amine compounds, single flame retardants, or composite flame retardants that replace other non-Dow Corning DC-8008 and transparent polycarbonate flame retardant FK-2025X combinations cannot meet the technical requirements in terms of light transmittance, bending strength, and impact strength.

[0029] As described above, the basic principle, main features and advantages of the present invention are well described. The above embodiments and descriptions are only descriptions of the preferred implementation modes of the present invention, and the present invention is not limited by the above embodiments. Without departing from the spirit and scope of the present invention, various changes and improvements made by ordinary technicians in this field to the technical solution of the present invention should fall within the protection scope determined by the present invention.

Claims

1. A highly transparent flame-retardant ABS composite material, characterized in that: The raw materials for preparing the highly transparent flame-retardant ABS composite material include, by weight: 100 parts of transparent ABS resin, 20-40 parts of composite flame retardant, 1-5 parts of flame retardant synergist, 15-30 parts of toughening agent and 1-3 parts of transparent synergist; The composite flame retardant is Dow Corning DC-8008 and transparent polycarbonate flame retardant FK-2025X; The transparent synergist is N-methyldiethanolamine.

2. The highly transparent flame-retardant ABS composite material according to claim 1, characterized in that: The mass ratio of Dow Corning DC-8008 to the transparent polycarbonate flame retardant FK-2025X is 4:1 to 1:

4.

3. The highly transparent flame-retardant ABS composite material according to claim 1, characterized in that: The flame retardant synergist is selected from at least one of diphenyl isopropyl phosphate, antimony trioxide or diphenyl isopropyl phosphate.

4. The highly transparent flame-retardant ABS composite material according to claim 1, characterized in that: The toughening agent is selected from at least one of styrene-isoprene-styrene block copolymer, styrene-ethylene-butylene-styrene block copolymer and methyl methacrylate-butadiene-styrene terpolymer.

5. The highly transparent flame-retardant ABS composite material according to claim 1, characterized in that: The highly transparent flame-retardant ABS composite material has a light transmittance of 90-95%, a flame retardant grade of UL94@1.6-3.2mmV-1 or above, a bending strength of not less than 60MPa, and an impact strength of not less than 15kJ / m 2 .

6. The highly transparent flame-retardant ABS composite material according to any one of claims 1 to 5, characterized in that: The raw materials for preparing the high-transparency flame-retardant ABS composite material further include, by weight: 3 to 6 parts of a nucleating agent, 1 to 5 parts of an antioxidant, 1 to 3 parts of a lubricant, 5 to 10 parts of a compatibilizer, and 0.4 to 0.8 parts of a dispersant.

7. The highly transparent flame-retardant ABS composite material according to claim 6, characterized in that: The nucleating agent is styrene-butadiene-styrene block copolymer.

8. The highly transparent flame-retardant ABS composite material according to claim 6, characterized in that: The antioxidant is dilauryl thiodipropionate.

9. The highly transparent flame-retardant ABS composite material according to claim 6, characterized in that: The lubricant is pentaerythritol stearate.

10. The highly transparent flame-retardant ABS composite material according to claim 6, characterized in that: The compatibilizer is maleic anhydride, and the dispersant is ethylene bisstearamide.

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