Elastomer material with wide temperature range and low dimensional change rate as well as preparation method and application of elastomer material

Abstract

The invention relates to the technical field of high polymer materials, and provides an elastomer material with a wide temperature range and a low dimensional change rate as well as a preparation method and application thereof. The invention relates to an elastomer material with a wide temperature range and a low dimensional change rate. The elastomer material comprises the following raw materials in parts by weight: 20-30 parts of SEBS, 20-25 parts of PP, 15-25 parts of a P0P elastomer, 10-15 parts of a lubricant, 10-20 parts of a filler, 1-2 parts of an antioxidant and 1-2 parts of a light stabilizer. The ethylene content of the P0P elastomer is 9wt%-15wt%. By means of the technical scheme, the problem that in the related technology, the size change rate of an elastomer material for the suspension assembly floor is large in a wide temperature range is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of high polymer materials, in particular, to a wide-temperature-range low-size-change-rate elastomer material and a preparation method and application thereof. BACKGROUND

[0002] Suspension assembly floor, as a kind of modular floor system, is widely used in various indoor and outdoor occasions such as sports venues, fitness rooms, kindergartens, activity centers and temporary sites due to its convenient installation, flexible disassembly, good buffering performance, aesthetic and durable advantages. Size stability is one of the key indicators to measure the performance of suspension assembly floor, which is directly related to the use effect, safety and service life of the floor system, joint problems, overall flatness, stress accumulation and damage, etc.

[0003] However, suspension assembly floor often faces severe temperature fluctuations in practical application, for example, outdoor sites need to withstand the alternating effects of high-temperature exposure in summer (ground surface temperature can reach more than 50℃) and severe cold in winter (as low as-20℃ below). Even in indoor non-constant temperature sites (such as unheated / air-conditioned gymnasiums, warehouses, etc.), the diurnal or seasonal temperature difference is also very significant. Such a wide temperature range environment puts high requirements on the thermal expansion and cold contraction resistance of the floor material.

[0004] At present, the main material of suspension assembly floor is elastomer (such as polyvinyl chloride (PVC), thermoplastic polyurethane (TPU), thermoplastic elastomer (SEBS), etc.), which inevitably expands and contracts when the temperature changes, resulting in changes in the size of the floor panels. The high and low temperature size change rate (usually measured by linear expansion coefficient or size change percentage in a specific temperature range) of the existing elastomer material is generally high, which is difficult to maintain the stability of the floor in a wide temperature range, and cannot meet the strict requirements of high-end suspension assembly floor on size precision.

[0005] Therefore, in view of the characteristics of the application scene of suspension assembly floor, it is necessary to develop an elastomer material with low size change rate in a wide temperature range to solve the problem of insufficient size stability of existing materials caused by temperature fluctuations, which has become a technical demand to be solved in the field. SUMMARY

[0006] The present application provides a wide-temperature-range low-size-change-rate elastomer material and a preparation method and application thereof, which solves the problem of large size change rate of elastomer material for suspension assembly floor in a wide temperature range in the related art.

[0007] The technical scheme of the present application is as follows: the present application provides a wide-temperature-range low-size-change-rate elastomer material, which comprises the following components by weight: SEBS 20-30 parts, PP 20-25 parts, P0P elastomer 15-25 parts, lubricant 10-15 parts, filler 10-20 parts, antioxidant 1-2 parts, and light stabilizer 1-2 parts; the ethylene content of the P0P elastomer is 9wt%-15wt%.

[0008] Further preferably, the components are SEBS 25 parts, PP 23 parts, P0P elastomer 20 parts, lubricant 12 parts, filler 20 parts, antioxidant 1 part, and light stabilizer 1 part.

[0009] As a further technical scheme, the filler is composed of alkaline magnesium sulfate whiskers and talc powder in a mass ratio of 1-1.2:1, for example, 1:1, 1.1:1, or 1.2:1, preferably 1:1.

[0010] In the present application, to further reduce the high and low temperature size change rate of the elastic floor, the base body of the elastic floor material is adjusted, and the filling system is also optimized, and alkaline magnesium sulfate whiskers and talc powder are used as fillers, the magnesium sulfate whiskers provide one-dimensional (long fiber direction) strong constraint and three-dimensional network skeleton, and the nano talc powder provides two-dimensional (in-plane direction) constraint and large-area interface restricted area, and the combination of the two can form a more perfect spatial constraint network, which significantly limits the movement of polymer molecular chains at high and low temperatures, thereby significantly reducing the high and low temperature size change rate of the elastomer material.

[0011] As a further technical scheme, the diameter of the alkaline magnesium sulfate whisker is 1-2 μm, for example, 1 μm, 1.2 μm, 1.5 μm, 1.8 μm, or 2 μm, preferably 1 μm; the length is 100-120 μm, for example, 100 μm, 105 μm, 110 μm, 115 μm, or 120 μm, preferably 100 μm; and the average particle size of the talc powder is 1250-5000 mesh, for example, 1250 mesh, 1500 mesh, 2000 mesh, 3000 mesh, 4000 mesh, or 5000 mesh, preferably 3000 mesh.

[0012] As a further technical scheme, the lubricant comprises one or both of paraffin oil and naphthenic oil; preferably paraffin oil.

[0013] As a further technical scheme, the antioxidant comprises one or more of antioxidant 1010, antioxidant 168, and antioxidant 1076, preferably antioxidant 1010.

[0014] As a further technical scheme, the light stabilizer is one or more of light stabilizer 770, light stabilizer 622, and light stabilizer 944, preferably light stabilizer 770.

[0015] The application further provides a preparation method of the wide-temperature-range low-size-change-rate elastomer material. S1, mixing the SEBS and the lubricant, and obtaining a mixture after standing; S2, mixing the mixture and the remaining raw materials to obtain a mixed material, and extruding and granulating the mixed material to obtain the wide-temperature-range low-size-change-rate elastomer material.

[0016] In step S1, the mixing time is 8-15 min, for example, 8 min, 9 min, 10 min, 11 min, 12 min, 13 min, 14 min or 15 min, preferably 10 min; and the standing time is 24-36 h, for example, 24 h, 28 h, 32 h or 36 h, preferably 24 h.

[0017] In step S2, the mixing temperature is 175-185 DEG C, for example, 175 DEG C, 178 DEG C, 180 DEG C, 182 DEG C or 185 DEG C, preferably 180 DEG C; and the mixing time is 20-30 min, for example, 20 min, 22 min, 24 min, 26 min, 28 min or 30 min, preferably 20 min.

[0018] The application further provides application of the wide-temperature-range low-size-change-rate elastomer material or the wide-temperature-range low-size-change-rate elastomer material prepared by the preparation method in suspended assembly floor.

[0019] The application has the following working principles and advantages: In the prior art, the elastic assembly floor mainly uses SEBS / PP as the base body, and SEBS is a linear (non-crosslinked) thermoplastic elastomer, which has a large size change rate at high and low temperatures, seriously affecting the size stability of the elastic floor at high and low temperatures. The application can effectively reduce the high and low temperature size change rate of the elastomer material by adding POP elastomer. The reason is that POP is a propylene-based elastomer, and under the action of a metallocene catalyst, the ethylene monomer contained therein is randomly inserted into the propylene molecular chain, effectively destroying the crystallization performance of the propylene molecular chain, so that the P-P sequence hard segment and the P-E sequence soft segment exist in the POP molecular chain, the hard segment is co-crystallized with the PP, forming a physical crosslinking point, and the soft segment is mutually soluble with the EB segment of SEBS, forming molecular entanglement, effectively improving the compatibility between PP / SEBS, and a large number of physical crosslinking points further limit the movement of the SEBS molecular chain, effectively reducing the high and low temperature size change rate of the elastomer material. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be clearly and completely described in combination with the embodiments of the present application. Obviously, the described embodiments are only a 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 a person of ordinary skill in the art without creative work are within the protection scope of the present application.

[0021] The following examples and comparative examples are: SEBS: model 6551, manufacturer Zhejiang Zhongli Science and Technology Synthetic Material Science and Technology Co., Ltd.; PP: model 7726, manufacturer Zhongtian Heyuan Energy Co., Ltd.; Paraffin oil: model No. 68, manufacturer Yuncheng Chemical (Shandong) Co., Ltd.; Basic magnesium sulfate whisker: diameter 1 μm, length 100 μm, manufacturer Yingkou Weiske Chemical Co., Ltd.

[0022] Example 1 A preparation method of a wide-temperature-range low-size-change-rate elastomer material, comprising the following steps: S1, 20 parts of SEBS and 10 parts of paraffin oil are mixed for 10 min, and the mixture is obtained after standing for 24 h; S2, the mixture and 25 parts of PP, 25 parts of POP elastomer, 20 parts of filler, 1 part of antioxidant 1010 and 1 part of light stabilizer 770 are added into a mixing machine, and the mixing is carried out at 180℃ for 20 min to obtain a mixing material, and the mixing material is extruded and granulated to obtain a wide-temperature-range low-size-change-rate elastomer material; The model of the POP elastomer is POP-3000, the ethylene content is 11 wt%, and the filler is talc powder with an average particle size of 3000 mesh.

[0023] Example 2 A preparation method of a wide-temperature-range low-size-change-rate elastomer material, comprising the following steps: S1, 25 parts of SEBS and 12 parts of paraffin oil are mixed for 10 min, and the mixture is obtained after standing for 24 h; S2, the mixture and 23 parts of PP, 20 parts of POP elastomer, 20 parts of filler, 1 part of antioxidant 1010 and 1 part of light stabilizer 770 are added into a mixing machine, and the mixing is carried out at 180℃ for 20 min to obtain a mixing material, and the mixing material is extruded and granulated to obtain a wide-temperature-range low-size-change-rate elastomer material; The model of the POP elastomer is POP-3000, the ethylene content is 11 wt%, and the filler is talc powder with an average particle size of 3000 mesh.

[0024] Example 3 A preparation method of a wide-temperature-range low-dimension-change-rate elastomer material, comprising the following steps: S1, 30 parts of SEBS and 15 parts of paraffin oil are mixed for 10 min, and the mixture is obtained after standing for 24 h; S2, the mixture, 20 parts of PP, 15 parts of POP elastomer, 20 parts of filler, 1 part of antioxidant 1010 and 1 part of light stabilizer 770 are added into a mixing machine, and the mixture is mixed at 180℃ for 20 min to obtain a mixed material, and the mixed material is extruded and granulated to obtain a wide-temperature-range low-dimension-change-rate elastomer material; The model of the POP elastomer is POP-3000, the ethylene content is 11wt%, and the filler is talc powder with an average particle size of 3000 mesh.

[0025] Example 4 Compared with Example 2, the difference of Example 4 is that the POP elastomer (model POP-3000, ethylene content 11wt%) is replaced by an equal amount of POP elastomer (model POP-3980, ethylene content 9wt%).

[0026] Example 5 Compared with Example 2, the difference of Example 5 is that the POP elastomer (model POP-3000, ethylene content 11wt%) is replaced by an equal amount of POP elastomer (model POP-6202, ethylene content 15wt%).

[0027] Example 6 Compared with Example 4, the difference of Example 6 is that the filler is composed of talc powder and basic magnesium sulfate whisker with a mass ratio of 1:1, and the particle size of the talc powder is 1250 mesh.

[0028] Example 7 Compared with Example 4, the difference of Example 7 is that the filler is composed of talc powder and basic magnesium sulfate whisker with a mass ratio of 1:1, and the particle size of the talc powder is 5000 mesh.

[0029] Example 8 Compared with Example 4, the difference of Example 8 is that the filler is composed of talc powder and basic magnesium sulfate whisker with a mass ratio of 1:1, and the particle size of the talc powder is 3000 mesh.

[0030] Example 9 A preparation method of a wide-temperature-range low-dimension-change-rate elastomer material, comprising the following steps: S1, 25 parts of SEBS and 12 parts of paraffin oil are mixed for 10 min, and the mixture is obtained after standing for 24 h; S2, the mixture and 23 parts of PP, 20 parts of POP elastomer, 14 parts of filler, 1 part of antioxidant 1010, and 1 part of light stabilizer 770 were added into a mixing machine, and mixed at 180℃ for 20 minutes to obtain a mixed material, and the mixed material was extruded and granulated to obtain a wide-temperature-range low-size-change elastomer material; The POP elastomer was POP-3980, and the filler was composed of talcum powder and basic magnesium sulfate whisker with a mass ratio of 1:1, and the average particle size of the talcum powder was 3000 mesh.

[0031] Comparative Example 1 Comparative Example 1 was different from Example 2 in that no POP elastomer was added.

[0032] Comparative Example 2 Comparative Example 2 was different from Example 2 in that the POP elastomer (POP-3000, ethylene content 11wt%) was replaced with an equal amount of POP elastomer (POP-3588, ethylene content 4wt%).

[0033] Comparative Example 3 Comparative Example 3 was different from Example 2 in that the POP elastomer (POP-3000, ethylene content 11wt%) was replaced with an equal amount of POP elastomer (POP-6102, ethylene content 16wt%).

[0034] Experimental Example 1 The wide-temperature-range low-size-change elastomer materials prepared in Examples 1-9 and Comparative Examples 1-3 were made into samples with a size of 25cm*25cm*2cm thick, and after being adjusted in a constant temperature and humidity environment for 24 hours, the four edge sizes L1-L4 were measured with a vernier caliper, then the adjusted sample was placed in an oven and baked at 80℃ for 24 hours, and after being taken out, the size L’1-L’4 was measured, and the single-side size change rate was calculated as (L-L’) / L, and the average of the size change rates of the four edges was taken as the overall size change rate of the sample at high temperature; The sample whose size change rate at high temperature was measured was placed in a constant temperature and humidity environment for 24 hours, and the four edge sizes L5-L8 were measured with a vernier caliper, then the adjusted sample was placed in an oven and frozen at -40℃ for 24 hours, and after being taken out, the size L’5-L ’ 8 was measured, and the single-side size change rate was calculated as (L-L’) / L, and the average of the size change rates of the four edges was taken as the overall size change rate of the sample at low temperature.

[0035] The test results are shown in Table 1. Table 1 Performance test results of the wide-temperature-range low-size-change elastomer materials prepared in Examples 1-9 and Comparative Examples 1-3

[0036] From table 1, it can be seen that by comparing the comparative example 1 and the example 2, the addition of the POP elastomer in the elastomer material can greatly reduce the size change rate of the material at high and low temperatures, and the elastomer material with low size change rate in a wide temperature range of-40~80℃ can be obtained, which can be widely applied in the floating floor.

[0037] By comparing the example 2 and the comparative example 2, it can be seen that when the ethylene content in the POP elastomer is too low, the compatibility of the POP elastomer and the SEBS is poor, and the size stability of the elastomer material in the comparative example 2 is poor.

[0038] In the example 4 and the examples 6~8, the size change rate of the examples 6~8 is less than that of the example 4, which indicates that the effect of the composite use of the talcum powder and the basic magnesium sulfate whisker is better than that of the single talcum powder, and the talcum powder and the basic magnesium sulfate whisker can play a synergistic effect, and further reduce the wide temperature range low size change rate of the elastomer material.

[0039] In the examples 6~8, the average particle size of the added talcum powder is different, and the size change rate of the example 8 is less than that of the examples 6 and 7, which indicates that when the average particle size of the talcum powder is 3000 mesh, the 3000 mesh talcum powder has a large specific surface area and is not easy to agglomerate, and has a strong molecular chain restriction ability, and the wide temperature range low size change rate of the obtained elastomer material is lower.

[0040] Compared with the example 8, the amount of the filler in the example 9 is reduced, and the size change rate of the example 11 is increased, which indicates that when the amount of the filler is 20 parts, the wide temperature range low size change rate of the elastomer material is lower.

[0041] The above is only the preferred embodiment of the present application, and is not used to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A low dimensional change rate elastomeric material over a wide temperature range, characterized in that, The wide temperature range low dimensional change rate elastomer material comprises the following components by weight: SEBS 20-30 parts, PP 20-25 parts, P0P elastomer 15-25 parts, lubricant 10-15 parts, filler 10-20 parts, antioxidant 1-2 parts, and light stabilizer 1-2 parts; the ethylene content of the P0P elastomer is 9wt%-15wt%.

2. The low dimensional change elastomeric material of claim 1, wherein, The filler is composed of basic magnesium sulfate whiskers and talc powder in a mass ratio of 1-1.2:

1.

3. The low dimensional change elastomeric material of claim 2, wherein, The diameter of the basic magnesium sulfate whiskers is 1-2 μm, and the length is 100-120 μm; the average particle size of the talc powder is 1250-5000 mesh.

4. The low profile, low dimensional change elastomeric material of claim 1 wherein, The lubricant comprises one or both of paraffin oil and naphthenic oil.

5. The low profile, low dimensional change elastomeric material of claim 1 wherein, The antioxidant comprises one or more of antioxidant 1010, antioxidant 168 and antioxidant 1076.

6. The low profile, low dimensional change elastomeric material of claim 1, wherein, The light stabilizer is one or more of light stabilizer 770, light stabilizer 622 and light stabilizer 944.

7. A method for producing a low dimensional change rate elastomer material in a wide temperature range, for producing the low dimensional change rate elastomer material in a wide temperature range according to any one of claims 1 to 6, characterized by, The method comprises the following steps: S1, mixing the SEBS and the lubricant, and standing to obtain a mixture; S2, mixing the mixture and the remaining raw materials to obtain a mixed material, and extruding and granulating the mixed material to obtain the wide temperature range low dimensional change rate elastomer material.

8. The method of claim 7, wherein the low dimensional change elastomeric material is prepared at a temperature of from about 20°C to about 100°C. In step S1, the mixing time is 8-15 min, and the standing time is 24-36 h.

9. The method of claim 7, wherein the low dimensional change elastomeric material is prepared at a temperature of from about 20°C to about 100°C. In step S2, the mixing temperature is 175-185 ℃, and the mixing time is 20-30 min.

10. The wide temperature range low dimensional change rate elastomer material prepared by the method of any one of claims 1-6 or any one of claims 7-9 is applied to a suspended assembly floor.

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