Polystyrene bead with high foaming ratio and preparation method thereof

Abstract

The invention relates to the technical field of polystyrene, and provides a polystyrene bead with high foaming ratio and a preparation method thereof, the polystyrene bead with high foaming ratio comprises the following raw materials by weight: 85-95 parts of polystyrene, 1-10 parts of organic rectorite, 2-4 parts of a foaming agent, and 3-6 parts of a flexibilizer; the preparation method of the organic rectorite comprises the following steps: A1, mixing sodium salt and rectorite slurry, and aging to obtain turbid liquid; a2, a cationic surface active agent is added into the turbid liquid for mixing and drying, and pretreated rectorite is obtained; and A3, mixing the pretreated rectorite with benzenesulfonyl hydroxamic acid, and drying to obtain the organic rectorite. According to the technical scheme, the problem that the compression strength of a polystyrene product prepared from the polystyrene beads with high foaming ratio in the prior art is relatively low is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of polystyrene, in particular to a kind of high foaming ratio polystyrene beads and preparation method thereof. BACKGROUND

[0002] High foaming ratio polystyrene beads are widely used, such as thermal insulation materials, etc., because in the process of polystyrene bead foaming, gas is wrapped inside the bead, forming a large number of cell structures, especially high foaming ratio polystyrene beads, after polystyrene products are prepared, there are more cell numbers and larger cell sizes in the polystyrene products, which will reduce the solid part of the polystyrene products relatively, and the compression strength of the polystyrene products is closely related to the content and structure of the solid part, so the reduction of the solid part will naturally weaken the overall compression resistance.

[0003] Therefore, it is necessary to prepare a kind of high foaming ratio polystyrene beads, which has excellent compression strength after being made into polystyrene products, to meet the long-term application needs of polystyrene products. SUMMARY

[0004] The present application provides a kind of high foaming ratio polystyrene beads and preparation method thereof, solve the problem of low compression strength of polystyrene products prepared by high foaming ratio polystyrene beads in the related art.

[0005] The technical scheme of the present application is as follows: The present application provides a kind of high foaming ratio polystyrene beads, which comprises the following raw materials by weight: polystyrene 85~95 parts, organic cummingtonite 1~10 parts, foaming agent 2~4 parts, toughening agent 3~6 parts. The preparation method of the organic cummingtonite comprises the following steps: A1, mix sodium salt and cummingtonite slurry, age, to obtain a suspension; A2, add cationic surfactant to the suspension and mix, dry, to obtain pretreated cummingtonite; A3, mix the pretreated cummingtonite with benzene sulfonyl hydroxamic acid, dry, to obtain organic cummingtonite.

[0006] As a further technical solution, in step A1, the aging time is 20~25h.

[0007] As a further technical solution, in step A1, the mixing includes ball milling.

[0008] As a further technical solution, in step A3, the temperature during mixing is 122-125℃.

[0009] As a further technical solution, in step A2 and step A3, the washing treatment is performed before drying.

[0010] As a further technical solution, in the cummingtonite slurry, the mass-volume ratio of cummingtonite and water is 1g:15-20mL, for example, it can be 1g:15mL, 1g:16mL, 1g:17mL, 1g:18mL, 1g:19mL, 1g:20mL.

[0011] As a further technical solution, the mass ratio of the sodium salt and the cummingtonite is 2-4:100, for example, it can be 2:100, 2.5:100, 3:100, 3.5:100, 4:100.

[0012] As a further technical solution, the mass ratio of the cationic surfactant, benzene sulfonyl hydroxamic acid and cummingtonite is 1.5-2.5:1:100, for example, it can be 1.5:1:100, 1.8:1:100, 2.0:1:100, 2.2:1:100, 2.5:1:100.

[0013] As a further technical solution, the cationic surfactant includes one or both of cetyltrimethylammonium bromide and octadecyltrimethylammonium chloride.

[0014] As a further technical solution, the sodium salt includes one or more of sodium chloride, sodium carbonate and sodium sulfate.

[0015] As a further technical solution, it further includes the following raw materials: metal oxide 2-6 parts by weight.

[0016] As a further technical solution, the metal oxide includes one or more of zinc oxide, aluminum oxide, zirconium oxide and cerium oxide.

[0017] In the present application, in addition to adding organic cummingtonite to the polystyrene beads with high foaming ratio, metal oxide is also added to synergize with organic cummingtonite, thereby improving the compressive strength of the polystyrene product prepared from the polystyrene beads with high foaming ratio, and also improving the tensile properties of the polystyrene product.

[0018] As a further technical solution, the foaming agent includes a low-boiling-point hydrocarbon.

[0019] In the present application, the foaming agent includes a low-boiling-point hydrocarbon, which can be, for example, petroleum ether, butane, pentane, etc., and is preferably pentane.

[0020] As a further technical solution, the toughening agent comprises one or both of styrene-butadiene-styrene block copolymer and ethylene-octene copolymer.

[0021] In the present application, the styrene-butadiene-styrene block copolymer and / or ethylene-octene copolymer used as the toughening agent can improve the processing flowability of the polystyrene beads, while enhancing the impact resistance of the foamed polystyrene product, reducing the rupture and damage caused by collision and the like during use, and improving the service life of the polystyrene product.

[0022] The present application also provides a preparation method of the high-foaming-ratio polystyrene beads. The raw materials of the polystyrene beads are mixed and then extruded and granulated to obtain the polystyrene beads.

[0023] As a further technical solution, the mixing time is 20-30 min.

[0024] The working principle and beneficial effects of the present application are as follows: In the present application, the high-foaming-ratio polystyrene beads are added with organic palygorskite, which is sequentially treated with a cationic surfactant and a benzene sulfonyl hydroxamic acid to obtain organic palygorskite having good compatibility with the polystyrene bead matrix, so that the compression strength of the polystyrene product prepared from the high-foaming-ratio (foaming ratio of 50 times or more) polystyrene beads is improved. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be clearly and completely described below in combination with the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0026] In the following examples and comparative examples, the polystyrene is of type PH88, the ethylene-octene copolymer is of type 8450G, the styrene-butadiene-styrene block copolymer is of type F875, the palygorskite has a particle size of 300 nm, the cerium oxide has a particle size of 50 nm, and the zirconium oxide has a particle size of 100 nm.

[0027] Example 1 The high-foaming-ratio polystyrene beads comprise the following raw materials by weight: 85 parts of polystyrene, 1 part of organic palygorskite, 2 parts of n-pentane, and 3 parts of ethylene-octene copolymer. The preparation method of the organic allevardite comprises the following steps: A1, the sodium carbonate and allevardite slurry are ball-mixed for 40 min, and aged for 20 h to obtain a suspension; the rotating speed during the ball-mixing is 300 r / min; A2, the hexadecyl trimethyl ammonium bromide is first added into the suspension to mix, wash, dry, and then mix with the benzene sulfonyl hydroxamic acid, and react at 125 DEG C for 25 min, cool, wash, and dry to obtain the organic allevardite; In the allevardite slurry, the mass-volume ratio of the allevardite and water is 100 g: 1500 mL; The mass ratio of the sodium carbonate and the allevardite is 2:100; The mass ratio of the hexadecyl trimethyl ammonium bromide, the benzene sulfonyl hydroxamic acid and the allevardite is 2:1:100; The polystyrene beads with high foaming ratio comprise the following steps: The raw materials of the polystyrene beads are mixed for 20 min, and then extruded and granulated to obtain the polystyrene beads.

[0028] Example 2 The polystyrene beads with high foaming ratio comprise the following raw materials by weight: polystyrene 90 parts, organic allevardite 5 parts, n-pentane 3 parts, ethylene-octene copolymer 4 parts; The preparation method of the organic allevardite comprises the following steps: A1, the sodium carbonate and allevardite slurry are ball-mixed for 40 min, and aged for 25 h to obtain a suspension; the rotating speed during the ball-mixing is 300 r / min; A2, the hexadecyl trimethyl ammonium bromide is first added into the suspension to mix, wash, dry, and then mix with the benzene sulfonyl hydroxamic acid, and react at 125 DEG C for 25 min, cool, wash, and dry to obtain the organic allevardite; In the allevardite slurry, the mass-volume ratio of the allevardite and water is 100 g: 1500 mL; The mass ratio of the sodium carbonate and the allevardite is 2:100; The mass ratio of the hexadecyl trimethyl ammonium bromide, the benzene sulfonyl hydroxamic acid and the allevardite is 2:1:100; The polystyrene beads with high foaming ratio comprise the following steps: The raw materials of the polystyrene beads are mixed for 20 min, and then extruded and granulated to obtain the polystyrene beads.

[0029] Example 3 The polystyrene beads with high foaming ratio comprise the following raw materials by weight: polystyrene 90 parts, organic allevardite 5 parts, n-pentane 3 parts, ethylene-octene copolymer 4 parts; The preparation method of the organic allevardite comprises the following steps: A1, sodium chloride, sodium carbonate, allevardite slurry is ball milled and mixed for 40 minutes, aged for 25 hours to obtain a suspension; the rotating speed during the ball milling and mixing is 300 r / min; A2, cetyltrimethylammonium bromide is first added into the suspension and mixed, washed, dried, then mixed with benzene sulfonyl hydroxamic acid, reacted at 125 DEG C for 25 minutes, cooled, washed, dried to obtain the organic allevardite; In the allevardite slurry, the mass-volume ratio of the allevardite and water is 100 g:2000 mL; The mass ratio of sodium chloride, sodium carbonate and allevardite is 1:2:100; The mass ratio of cetyltrimethylammonium bromide, benzene sulfonyl hydroxamic acid and allevardite is 2.5:1:100; The polystyrene beads with high foaming ratio comprise the following steps: The raw materials of the polystyrene beads are mixed for 30 minutes, then extruded and granulated to obtain the polystyrene beads.

[0030] Example 4 The polystyrene beads with high foaming ratio comprise the following raw materials by weight: polystyrene 90 parts, organic allevardite 5 parts, n-pentane 3 parts, ethylene-octene copolymer 4 parts, cerium oxide 4 parts; The preparation method of the organic allevardite comprises the following steps: A1, sodium carbonate, allevardite slurry is ball milled and mixed for 40 minutes, aged for 25 hours to obtain a suspension; the rotating speed during the ball milling and mixing is 300 r / min; A2, cetyltrimethylammonium bromide is first added into the suspension and mixed, washed, dried, then mixed with benzene sulfonyl hydroxamic acid, reacted at 125 DEG C for 25 minutes, cooled, washed, dried to obtain the organic allevardite; In the allevardite slurry, the mass-volume ratio of the allevardite and water is 100 g:1800 mL; The mass ratio of sodium carbonate and allevardite is 4:100; The mass ratio of cetyltrimethylammonium bromide, benzene sulfonyl hydroxamic acid and allevardite is 2:1:100; The polystyrene beads with high foaming ratio comprise the following steps: The raw materials of the polystyrene beads are mixed for 25 minutes, then extruded and granulated to obtain the polystyrene beads.

[0031] Example 5 The polystyrene beads with high foaming ratio comprise the following raw materials by weight: polystyrene 90 parts, organic allevardite 5 parts, n-pentane 3 parts, ethylene-octene copolymer 4 parts, cerium oxide 3 parts, zirconium oxide 3 parts; The preparation method of the organic allevardite comprises the following steps: A1, the sodium carbonate and the allevardite slurry are ball-mixed for 40 min, and aged for 25 h to obtain a suspension; the rotating speed during the ball-mixing is 300 r / min; A2, the cetyltrimethylammonium bromide is first added into the suspension to mix, washed, dried, and then mixed with the benzenesulfonylhydroxamic acid, reacted at 125 ℃ for 25 min, cooled, washed, and dried to obtain the organic allevardite; In the allevardite slurry, the mass-volume ratio of the allevardite and water is 100 g:1800 mL; The mass ratio of the sodium carbonate and the allevardite is 4:100; The mass ratio of the cetyltrimethylammonium bromide, the benzenesulfonylhydroxamic acid and the allevardite is 2:1:100; The polystyrene beads with high foaming ratio comprise the following steps: The raw materials of the polystyrene beads are mixed for 25 min, and then extruded and granulated to obtain the polystyrene beads.

[0032] Example 6 The polystyrene beads with high foaming ratio comprise the following raw materials by weight: polystyrene 90 parts, organic allevardite 5 parts, n-pentane 3 parts, ethylene-octene copolymer 4 parts, and cerium oxide 2 parts; The preparation method of the organic allevardite comprises the following steps: A1, the sodium carbonate and the allevardite slurry are ball-mixed for 40 min, and aged for 25 h to obtain a suspension; the rotating speed during the ball-mixing is 300 r / min; A2, the cetyltrimethylammonium bromide is first added into the suspension to mix, washed, dried, and then mixed with the benzenesulfonylhydroxamic acid, reacted at 125 ℃ for 25 min, cooled, washed, and dried to obtain the organic allevardite; In the allevardite slurry, the mass-volume ratio of the allevardite and water is 100 g:1800 mL; The mass ratio of the sodium carbonate and the allevardite is 4:100; The mass ratio of the cetyltrimethylammonium bromide, the benzenesulfonylhydroxamic acid and the allevardite is 2:1:100; The polystyrene beads with high foaming ratio comprise the following steps: The raw materials of the polystyrene beads are mixed for 25 min, and then extruded and granulated to obtain the polystyrene beads.

[0033] Example 7 The difference between this example and Example 2 is that the organic allevardite in the raw materials of the polystyrene beads with high foaming ratio is 9 parts by weight.

[0034] Comparative Example 1 The polystyrene beads with high foaming ratio comprise the following raw materials by weight: polystyrene 90 parts, organic alunite 5 parts, n-pentane 3 parts, ethylene-octene copolymer 4 parts; The preparation method of the organic alunite comprises the following steps: A1, ball-mill mix sodium carbonate and alunite slurry for 40 min, age for 25 h to obtain a suspension; the rotating speed during the ball-mill mixing is 300 r / min; A2, add cetyltrimethylammonium bromide into the suspension to mix, wash, and dry to obtain the organic alunite; In the alunite slurry, the mass-volume ratio of the alunite and water is 100 g:1800 mL; The mass ratio of the sodium carbonate and the alunite is 4:100; The mass ratio of the cetyltrimethylammonium bromide and the alunite is 3:100; The polystyrene beads with high foaming ratio comprise the following steps: Mix the raw materials of the polystyrene beads for 25 min, then extrude and granulate to obtain the polystyrene beads.

[0035] Comparative Example 2 The polystyrene beads with high foaming ratio comprise the following raw materials by weight: polystyrene 90 parts, organic alunite 5 parts, n-pentane 3 parts, ethylene-octene copolymer 4 parts; The preparation method of the organic alunite comprises the following steps: A1, ball-mill mix sodium carbonate and alunite slurry for 40 min, age for 25 h to obtain a suspension; the rotating speed during the ball-mill mixing is 300 r / min; A2, add benzene sulfonyl hydroxamic acid into the suspension to mix, react at 125℃ for 25 min, cool, wash, and dry to obtain the organic alunite; In the alunite slurry, the mass-volume ratio of the alunite and water is 100 g:1800 mL; The mass ratio of the sodium carbonate and the alunite is 4:100; The mass ratio of the benzene sulfonyl hydroxamic acid and the alunite is 3:100; The polystyrene beads with high foaming ratio comprise the following steps: Mix the raw materials of the polystyrene beads for 25 min, then extrude and granulate to obtain the polystyrene beads.

[0036] Comparative Example 3 The polystyrene beads with high foaming ratio comprise the following raw materials by weight: polystyrene 90 parts, organic alunite 5 parts, n-pentane 3 parts, ethylene-octene copolymer 4 parts; The preparation method of the organic allevardite comprises the following steps: A1, sodium carbonate and allevardite slurry are ball-mixed for 40 min, aged for 25 h to obtain a suspension; the rotation speed during ball-mixing is 300 r / min; A2, the suspension is first mixed with benzenesulfonyl hydroxamic acid, and then reacted at 125 ℃ for 25 min, cooled, washed, and dried; then cetyltrimethylammonium bromide is added for mixing, washing, and drying to obtain the organic allevardite; In the allevardite slurry, the mass-volume ratio of allevardite to water is 100 g:1800 mL; The mass ratio of sodium carbonate to allevardite is 4:100; The mass ratio of cetyltrimethylammonium bromide, benzenesulfonyl hydroxamic acid, and allevardite is 2:1:100; The high-foaming polystyrene beads comprise the following steps: The raw material of the polystyrene beads is mixed for 25 min, and then extruded and granulated to obtain the polystyrene beads.

[0037] Comparative Example 4 The difference between this comparative example and Example 2 is that the organic allevardite in the components of the raw material of the high-foaming polystyrene beads is replaced by cerium oxide, and the amount of cerium oxide in the raw material is 9 parts by weight.

[0038] Experimental Example 1 The polystyrene beads prepared in Examples 1-7 and Comparative Examples 1-4 are respectively molded into boards (polystyrene foam boards), and then the compression strength (relative deformation <10%) is tested according to GB / T 8813-2020 “Hard Foam Plastic Compression Performance Test”, and the results are shown in Table 1 below.

[0039] Table 1: Compression strength test results

[0040] Compared with Comparative Examples 1-4, the compression strength of the polystyrene beads prepared in Examples 1-7 after being molded into boards is higher, which indicates that the organic allevardite prepared by the present application, and the synergy of the organic allevardite and the metal oxide, improves the compression strength of the polystyrene product prepared from the high-foaming polystyrene beads.

[0041] Experimental Example 2 The polystyrene beads prepared in Example 2, Examples 4-7, and Comparative Example 4 are respectively molded into boards (polystyrene foam boards), and then the tensile stress at break is tested according to the standard GB / T 9641-1988 “Hard Foam Plastic Tensile Property Test Method”, and the results are shown in Table 2 below.

[0042] Table 2. Results of tensile property tests

[0043] The polystyrene beads prepared in Examples 4-6 have higher tensile stress at break after molding into a plate, indicating that the organic alunite prepared by the present application is synergistic with metal oxides, and improves the tensile properties of polystyrene products prepared from high-foaming polystyrene beads.

[0044] The above only is the preferred embodiment of the present application, and does not limit the present application, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A polystyrene bead with a high expansion ratio, characterized in that: The method comprises the following raw materials in parts by weight: 85-95 parts of polystyrene, 1-10 parts of organic rectorite, 2-4 parts of foaming agent, and 3-6 parts of toughening agent; The preparation method of the organic rectorite comprises the following steps: A1. Mixing sodium salt and rectorite slurry, aging, and obtaining a suspension; A2. adding a cationic surfactant to the suspension, mixing, and drying to obtain a pretreated rectorite; A3. Mixing the pretreated rectorite with benzenesulfonyl hydroxamic acid, and drying the mixture to obtain an organic rectorite.

2. The polystyrene beads with a high expansion ratio according to claim 1, characterized in that: In the rectorite slurry, the mass volume ratio of rectorite to water is 1 g:15-20 mL; The mass ratio of the sodium salt to the rectorite is 2-4:100; The mass ratio of the cationic surfactant, benzenesulfonyl hydroxamic acid and rectorite is 1.5-2.5:1:

100.

3. The polystyrene beads with a high expansion ratio according to claim 1, characterized in that: In step A1, the aging time is 20 to 25 hours.

4. The polystyrene beads with a high expansion ratio according to claim 1, characterized in that: In step A1, the mixing includes ball milling.

5. The polystyrene beads with high expansion ratio according to claim 1, characterized in that: The cationic surfactant includes one or both of cetyltrimethylammonium bromide and octadecyltrimethylammonium chloride.

6. The polystyrene beads with a high expansion ratio according to claim 1, characterized in that: The sodium salt includes one or more of sodium chloride, sodium carbonate, and sodium sulfate.

7. The polystyrene beads with high expansion ratio according to claim 1, characterized in that: The invention also includes the following raw materials in parts by weight: 2 to 6 parts of metal oxide.

8. The polystyrene beads with high expansion ratio according to claim 7, characterized in that: The metal oxide includes one or more of zinc oxide, aluminum oxide, zirconium oxide, and cerium oxide.

9. A method for preparing polystyrene beads with a high expansion ratio, for preparing the polystyrene beads with a high expansion ratio according to any one of claims 1 to 8, characterized in that: The following steps are involved: The polystyrene beads are obtained by mixing raw materials of the polystyrene beads and then extruding and granulating the mixture.

10. The method for preparing polystyrene beads with a high expansion ratio according to claim 9, characterized in that: The mixing time is 20 to 30 minutes.

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