A polystyrene decorative line and its preparation method

Abstract

The present invention relates to a polystyrene decorative line and a preparation method thereof. In terms of parts by weight, the raw materials include: 70 - 100 parts of polystyrene particles, 4 - 6 parts of impact-resistant polystyrene particles, 20 - 35 parts of ABS resin particles, 20 - 35 parts of PC resin particles, 5 - 10 parts of maleic anhydride grafted styrene-ethylene-butadiene-styrene block copolymer elastomer, 10 - 20 parts of glass fiber, 4 - 13 parts of graphite powder, 0.3 - 1.5 parts of talc powder, 5 - 7 parts of glass powder, 5 - 13 parts of flame retardant, 2 - 13 parts of stabilizer, and 7 - 10 parts of foaming agent. The polystyrene decorative line prepared in this application has uniform pores inside, greatly reducing the density of the polystyrene decorative line. At the same time, glass fiber, graphite powder, talc powder, and glass powder are evenly mixed inside the polystyrene decorative line, and the prepared polystyrene decorative line has good mechanical properties, which is sufficient to meet the daily use requirements.

Description

Technical Field

[0001] The present invention relates to the field of decorative lines, and particularly to a polystyrene decorative line and a preparation method thereof. Background Art

[0002] Decorative lines are a kind of decorative materials commonly used in interior decoration, and their installation positions are mainly on the wall surface, at the junction of the wall surface and the ceiling, and at the junction of the wall surface and the floor.

[0003] Currently, common decorative lines are mainly made of materials such as marble, aluminum products, and wood-plastic products. However, the decorative lines made of aluminum products are relatively monotonous and have no color patterns to choose from, thus failing to play a beautiful role; the marble material has poor matching with the wall surface or floor, and is difficult to install and heavy to carry; the wood-plastic products have insufficient strength and are difficult to meet the daily use requirements. Summary of the Invention

[0004] In view of the deficiencies of the prior art, the present invention provides a polystyrene decorative line and a preparation method thereof. The polystyrene decorative line has uniform pores inside, greatly reducing the density of the polystyrene decorative line. At the same time, glass fiber, graphite powder, talcum powder, and glass powder are evenly mixed inside the polystyrene decorative line, and the prepared polystyrene decorative line has good mechanical properties.

[0005] To solve the above technical problems, the present invention provides a polystyrene decorative line, which comprises the following raw materials in parts by weight: 70 - 100 parts of polystyrene particles, 4 - 6 parts of impact-resistant polystyrene particles, 20 - 35 parts of ABS resin particles, 20 - 35 parts of PC resin particles, 5 - 10 parts of maleic anhydride grafted styrene-ethylene-butadiene-styrene block copolymer elastomer, 10 - 20 parts of glass fiber, 4 - 13 parts of graphite powder, 0.3 - 1.5 parts of talcum powder, 5 - 7 parts of glass powder, 5 - 13 parts of flame retardant, 2 - 13 parts of stabilizer, and 7 - 10 parts of foaming agent.

[0006] Further, the MFR of the polystyrene particles is 2 - 5 g / 10 min.

[0007] Through the above technical solution, selecting appropriate polystyrene particles can ensure that the material has good fluidity during the processing.

[0008] Further, the average molecular weight of the impact-resistant polystyrene particles is 100,000 - 150,000.

[0009] Further, the length of the glass fiber is 0.75 - 1 mm.

[0010] Through the above technical solution, when the length of the glass fiber is greater than 3 mm, it will cause the surface of the extruded sheet to be uneven, while if the fiber length is too short, its reinforcing effect will be reduced.

[0011] Further, the stabilizer is at least one of calcium-zinc stabilizer, tribasic lead sulfate, and tribasic lead sulfate.

[0012] Further, the flame retardant is at least one of aluminum hydroxide, brominated epoxy oligomer, decabromodiphenyl ethane, tetrabromobisphenol A diallyl ether, and decabromodiphenyl ethane.

[0013] Further, the foaming agent is carbon dioxide.

[0014] Further, the particle size of the graphite powder is 0.03 - 0.05 mm.

[0015] Further, the particle size of the talcum powder is 5 - 10 μm.

[0016] Further, the glass powder is 200 - 250 mesh.

[0017] The present invention also provides a method for preparing a polystyrene decorative line, which at least includes the following steps:

[0018] S1. Respectively take polystyrene particles, impact-resistant polystyrene particles, ABS resin particles, PC resin particles, maleic anhydride-grafted styrene-ethylene-butadiene-styrene block copolymer elastomer, glass fiber, graphite powder, talcum powder, glass powder, flame retardant, and stabilizer, add them to a stirring kettle and mix well to obtain a first mixture;

[0019] S2. Add the first mixture into an extruder. The temperature of the extruder is 180 - 200 °C, and the rotation speed of the screw is 20 - 35 r / min to fully melt the first mixture;

[0020] S3. Add the foaming agent into the melt of the first mixture through a metering pump dosing device, and increase the internal pressure of the extruder to 14 - 18 MPa to fuse the foaming agent with the melt of the first mixture to form a gel for foaming;

[0021] S4. The gel enters the rear-section extruder, passes through a heat exchanger. The temperature of the heat exchanger is 100 - 125 °C, and the rotation speed of the rear-section extruder is 9 - 11 r / min. The gel is extruded and formed through a die; then it is cut to obtain a polystyrene extruded sheet;

[0022] S5. After the polystyrene extruded sheet is cut according to the required shape, polyurethane glue is coated on its surface, and an outer skin is wrapped on the outside to prepare a polystyrene decorative line.

[0023] Furthermore, a method for preparing ABS resin particles includes at least the following steps:

[0024] (1) By weight, take 12.5 parts of acrylonitrile, 25 parts of styrene, 0.05 part of benzoyl peroxide, 1 part of disproportionated rosin potassium soap, and 80 parts of deionized water. Adjust the pH of the emulsion to 8 - 10, the reaction temperature to 50 - 75°C, and the pressure to 0.5 - 2 MPa. React for 30 - 40 min to obtain the first mixed emulsion;

[0025] (2) Add 25 parts of butadiene monomer, 0.05 part of benzoyl peroxide, and 0.02 part of dodecyl mercaptan to the first mixed emulsion, heat up to 120 - 140°C, and continue to react for 2 - 3 hours to obtain the second mixed emulsion;

[0026] (3) Cure the second mixed emulsion at 75 - 80°C for 0.5 hour and then cool it to 60°C to obtain the ABS graft copolymer latex;

[0027] (4) Flocculate the ABS graft copolymer latex at 65°C for 20 - 30 min, and then dry it to obtain the ABS graft copolymer powder;

[0028] (5) Melt - blend 20 parts by weight of the ABS graft copolymer powder and 80 parts of SAN resin at 200 - 240°C using a twin - screw extruder, and then cool and pelletize to obtain the ABS resin particles.

[0029] In the technical solution of the present invention, the following beneficial effects are achieved:

[0030] 1. Through the foaming process, innumerable uniform and delicate bubbles are formed inside the polystyrene decorative line. The formed polystyrene decorative line has uniform pores, greatly reducing the density of the polystyrene decorative line. The weight of the prepared polystyrene decorative line is about 25% lighter than that of the decorative lines on the market.

[0031] 2. Through the scientific ratio of each raw material, while ensuring that the bubbles inside the polystyrene decorative line do not burst, glass fiber, graphite powder, talc powder, and glass powder are evenly mixed in the melt. The prepared polystyrene decorative line has good mechanical properties. Specific Embodiments

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0033] In the experimental methods in the following examples, unless otherwise specified, they are all conventional methods. The test materials, reagents, etc. used in the following examples can all be obtained from commercial channels unless otherwise specified. In the quantitative tests in the following examples, three repeated experiments are set, and the data are the average value or the average value ± standard deviation of the three repeated experiments.

[0034] In addition, "and / or" in the full text includes three scenarios. Taking A and / or B as an example, it includes technical solution A, technical solution B, and the technical solution that satisfies both A and B at the same time; in addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0035] Example 1

[0036] S1. Respectively take polystyrene particles, high impact polystyrene particles, ABS resin particles, PC resin particles, maleic anhydride grafted styrene-ethylene-butadiene-styrene block copolymer elastomer, glass fiber, graphite powder, talc powder, glass powder, flame retardant, and stabilizer, add them to a stirring kettle and mix well to obtain a first mixture.

[0037] S2. Add the first mixture into an extruder. The temperature of the extruder is 180 °C, and the rotation speed of the screw is 35 r / min to fully melt the first mixture.

[0038] S3. Add the blowing agent into the melt of the first mixture through a metering pump dosing device, increase the internal pressure of the extruder by 18 MPa, and make the blowing agent fuse with the melt of the first mixture to form a gel for foaming.

[0039] S4. The gel enters the rear section of the extruder and passes through a heat exchanger. The temperature of the heat exchanger is 100 °C, and the rotation speed of the rear section of the extruder is 10 r / min. The gel is extruded and formed through a die; then it is cut to obtain a polystyrene extrusion board.

[0040] S5. After the polystyrene extrusion board is cut according to the required shape, its surface is coated with polyurethane glue and an outer skin is wrapped to prepare a polystyrene decorative line.

[0041] The preparation methods of the polystyrene decorative lines in Examples 2 and 3 are the same as those in Example 1. The raw material dosages and reaction conditions of Examples 1 to 3 are shown in Tables 1 and 2 respectively.

[0042] Table 1 Raw material dosages in each example (in parts by weight)

[0043]

[0044] Table 2 Reaction conditions for each step in each example

[0045]

[0046]

[0047] Among them, the preparation method of the ABS resin particles used in Examples 1, 2, and 3 is as follows:

[0048] (1) Taking 12.5 parts by weight of acrylonitrile, 25 parts of styrene, 0.05 part of benzoyl peroxide, 1 part of potassium disproportionated rosin soap, and 80 parts of deionized water, adjusting the pH of the emulsion to 80, the reaction temperature to 60 °C, the pressure to 1.5 MPa, and reacting for 35 min to obtain the first mixed emulsion;

[0049] (2) Adding 25 parts of butadiene monomer, 0.05 part of benzoyl peroxide, and 0.02 part of dodecyl mercaptan to the first mixed emulsion, heating up to 130 °C, and continuing to react for 2.5 h to obtain the second mixed emulsion;

[0050] (3) After aging the second mixed emulsion at 75 °C for 0.5 h and then cooling it to 60 °C, the ABS graft copolymer latex is obtained;

[0051] (4) Flocculating the ABS graft copolymer latex at 65 °C for 20 min, and then drying it to obtain the ABS graft copolymer rubber powder;

[0052] (5) Melting and blending 20 parts by weight of the ABS graft copolymer rubber powder and 80 parts of SAN resin at 210 °C using a twin-screw extruder, and cooling and pelletizing to obtain the ABS resin particles.

[0053] The properties of the polystyrene decorative lines prepared in Examples 1 to 3 are shown in Table 3.

[0054] Table 3 Properties of the polystyrene decorative lines prepared in each example

[0055] Test Items Test Standards Example 1 Example 2 Example 3 Compressive Strength (KPa) GB / T 1041 782 756 744 Compressive Modulus of Elasticity (MPa) GB / T 1041 42 35 38 Tensile Strength (MPa) GB / T1040.2 0.45 0.43 0.40 Dimensional Stability (%) GB / T 8811 0.92 1.05 1.02

[0056] In summary, the polystyrene decorative lines prepared by the present invention have good mechanical properties.

[0057] The difference between Comparative Example 1 and Example 1 is that the raw materials do not contain PC resin particles.

[0058] The difference between Comparative Example 2 and Example 1 is that the raw materials do not contain maleic anhydride-grafted styrene-ethylene-butadiene-styrene block copolymer elastomer.

[0059] The difference between Comparative Example 3 and Example 1 is that the raw materials do not contain glass fiber, graphite powder, talcum powder and glass powder.

[0060] The difference between Comparative Example 4 and Example 1 is that the raw materials do not contain glass fiber.

[0061] The difference between Comparative Example 5 and Example 1 is that the raw materials do not contain graphite powder.

[0062] The difference between Comparative Example 6 and Example 1 is that the raw materials do not contain talcum powder.

[0063] The difference between Comparative Example 7 and Example 1 is that the raw materials do not contain glass powder.

[0064] The properties of the polystyrene decorative lines prepared in Comparative Examples 1-7 are shown in Table 4.

[0065] Table 4 Properties of the polystyrene decorative lines prepared in Comparative Examples 1-7

[0066]

[0067] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0068] The above-described embodiments only represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent should be subject to the appended claims.

Claims

1. A polystyrene decorative line, characterized in that, The following raw materials are included in parts by weight: (1) The first mixture: 70-100 parts of polystyrene particles, 4-6 parts of high-impact polystyrene particles, 20-35 parts of ABS resin particles, 20-35 parts of PC resin particles, 5-10 parts of maleic anhydride grafted styrene-ethylene-butadiene-styrene block copolymer elastomer, 10-20 parts of glass fiber, 4-13 parts of graphite powder, 0.3-1.5 parts of talc powder, 5-7 parts of glass powder, 5-13 parts of flame retardant, and 2-13 parts of stabilizer; (2) 7-10 parts of foaming agent; The length of the glass fiber is 0.75-1 mm; The stabilizer is at least one of calcium zinc stabilizer, tribasic lead sulfate, and tribasic lead sulfate; The flame retardant is at least one of aluminum hydroxide, brominated epoxy oligomer, tetrabromobisphenol A bisallyl ether, and decabromodiphenyl ethane; The foaming agent is carbon dioxide; The polystyrene decorative line is obtained by fusing the foaming agent carbon dioxide with the melt of the first mixed material under the pressure condition of 14-18MPa, and further controlling the temperature at 100-125°C to form the polystyrene decorative line.

2. A polystyrene decorative line according to claim 1, characterized in that: The particle size of the graphite powder is 0.03-0.05 mm.

3. A polystyrene decorative line according to claim 1, characterized in that: The particle size of the talc powder is 5-10 μm.

4. A polystyrene decorative line according to claim 1, characterized in that: The glass powder is 200-250 mesh.

5. A method for preparing a polystyrene decorative line according to any one of claims 1-4, characterized in that: At least the following steps are included: S1. According to any one of claims 1 to 4, respectively take polystyrene particles, impact-resistant polystyrene particles, ABS resin particles, PC resin particles, maleic anhydride grafted styrene-ethylene-butadiene-styrene block copolymer elastomer, glass fiber, graphite powder, talcum powder, glass powder, flame retardant, and stabilizer, add them into a stirring tank and mix them thoroughly to obtain a first mixture; S2, adding the first mixed material into an extruder, wherein the temperature of the extruder is 180-200°C and the speed of the screw is 20-35 r / min, so that the first mixed material is fully melted; S3, adding the foaming agent into the melt of the first mixed material through a metering pump proportioning and dosing device, increasing the internal pressure of the extruder to 14-18 MPa, so that the foaming agent and the melt of the first mixed material are fused to form a gel for foaming; S4, the gel enters the back-end extruder, passes through the heat exchanger, the temperature of the heat exchanger is 100-125°C, the speed of the back-end extruder is 9-11 r / min, and the gel is extruded through the mold; then it is cut to obtain a polystyrene extruded sheet; S5. After the polystyrene extruded board is cut into a desired shape, polyurethane glue is coated on its surface and a skin is coated on the outer layer to prepare a polystyrene decorative line.

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