Polypropylene floor and preparation method thereof

Abstract

The present invention relates to the field of flooring, and more specifically, to a polypropylene flooring and a preparation method thereof. The first aspect of the present invention provides a polypropylene flooring, wherein the raw materials for its preparation include 25 to 35 parts of polypropylene, 55 to 65 parts of fillers, 1 to 3 parts of polyolefin elastomers, and 1 to 3 parts of coupling agents by weight; the particle size of the filler is 325 to 1250 meshes. The polypropylene flooring provided by the present invention has the characteristics of being non-toxic and odorless, and does not volatilize toxic gases; it has excellent dimensional stability and heat resistance, has no warping and deformation, and prolongs its service life, and has certain use value and economic benefits.

Description

Technical Field

[0001] The present invention relates to the field of flooring, and more particularly to a polypropylene flooring and a preparation method thereof. Background Art

[0002] The current trend of plastic flooring product development is to use plastic materials to replace natural wood and reduce damage to the natural environment. Traditional composite floors are mostly based on polyvinyl chloride (PVC), but PVC floors have the disadvantage of poor environmental protection. For example, they produce toxic hydrogen chloride and carbon monoxide gases when they are cracked, and dioxins and other toxic gases after combustion. They usually contain phthalate plasticizers, which can cause reproductive toxicity when precipitated. In addition, PVC floors have poor dimensional stability, and unclassified recycled floors cannot be biodegraded after being abandoned and buried, causing white pollution. Summary of the invention

[0003] In view of some problems existing in the prior art, the first aspect of the present invention provides a polypropylene floor, wherein the raw materials for preparing the floor include, by weight, 25 to 35 parts of polypropylene, 55 to 65 parts of filler, 1 to 3 parts of polyolefin elastomer, and 1 to 3 parts of coupling agent; the particle size of the filler is 325 to 1250 mesh.

[0004] As a preferred technical solution of the present invention, the melt index of the polypropylene is 0.8-100 g / 10 min.

[0005] As a preferred technical solution of the present invention, the filler includes at least one of talc, calcium carbonate, barium sulfate and mica.

[0006] As a preferred technical solution of the present invention, the polyolefin elastomer is an ethylene-octene copolymer and / or an ethylene-propylene copolymer.

[0007] As a preferred technical solution of the present invention, the melt index of the polyolefin elastomer is 25 to 35 g / 10 min.

[0008] As a preferred technical solution of the present invention, the Shore hardness of the polyolefin elastomer is 65-75.

[0009] As a preferred technical solution of the present invention, the coupling agent includes at least one of a titanate coupling agent, an aluminate coupling agent, and a silane coupling agent.

[0010] As a preferred technical solution of the present invention, the coupling agent is a titanate coupling agent.

[0011] As a preferred technical solution of the present invention, the raw materials for preparing the polypropylene floor further include 0.1 to 1 parts of antioxidant and 0.5 to 3 parts of lubricant by weight.

[0012] The second aspect of the present invention provides a method for preparing a polypropylene floor, which comprises: placing the raw materials for preparing the polypropylene floor in a high-speed mixer and mixing them at high speed, then putting them into a twin-screw extruder, and directly extruding and molding them.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] The polypropylene floor provided by the invention has the characteristics of being non-toxic and tasteless, and does not emit toxic gas; it has excellent dimensional stability and heat resistance, and has no warping or deformation, thus extending its service life and having certain use value and economic benefits. DETAILED DESCRIPTION

[0015] The present invention is described below by specific implementation methods, but is not limited to the specific embodiments given below.

[0016] The first aspect of the present invention provides a polypropylene floor, wherein the raw materials for preparing the floor include 25 to 35 parts of polypropylene, 55 to 65 parts of filler, 1 to 3 parts of polyolefin elastomer, and 1 to 3 parts of coupling agent by weight.

[0017] In one embodiment, the raw materials for preparing the polypropylene floor further include 0.1 to 1 parts of antioxidant and 0.5 to 3 parts of lubricant by weight.

[0018] In a preferred embodiment, the raw materials for its preparation include, by weight, 30 parts of polypropylene, 60 parts of filler, 2 parts of polyolefin elastomer, 2 parts of coupling agent, 0.5 parts of antioxidant and 1.5 parts of lubricant.

[0019] Polypropylene

[0020] Polypropylene is a polymer formed by the addition polymerization of propylene. It is a white waxy material with a transparent and light appearance and a density of 0.89 to 0.91 g / cm 3 , flammable, melting point 165℃, softening at around 155℃, use temperature range -30~140℃. It can resist corrosion from acid, alkali, salt solution and various organic solvents below 80℃, and can decompose under high temperature and oxidation. Polypropylene is widely used in the production of clothing, blankets and other fiber products, medical equipment, automobiles, bicycles, parts, pipelines, chemical containers, etc., and is also used in food and medicine packaging.

[0021] In one embodiment, the melt index of the polypropylene is 0.8 to 100 g / 10 min.

[0022] Preferably, the melt index of the polypropylene is 2 to 5 g / 10 min; more preferably, the melt index of the polypropylene is 2.5 g / 10 min.

[0023] The polypropylene with a melt index of 2.5 g / 10 min of the present invention was purchased from Beijing Kunpeng Chemical Co., Ltd. with a brand name of K8003; the polypropylene-2 ​​with a melt index of 2 g / 10 min was purchased from Zhejiang Chuangjin Petrochemical Co., Ltd. with a brand name of PP 3015; the polypropylene-2 ​​with a melt index of 5 g / 10 min was purchased from Suzhou Sujilongye International Trade Co., Ltd. with a brand name of PP 3040.

[0024] Fillers

[0025] In one embodiment, the filler has a particle size of 325-1250 mesh.

[0026] Preferably, the particle size of the filler is 325-800 mesh; more preferably, the particle size of the filler is 400 mesh.

[0027] In one embodiment, the filler includes at least one of talc, calcium carbonate, barium sulfate, and mica.

[0028] Preferably, the filler is calcium carbonate.

[0029] The calcium carbonate with a particle size of 325 meshes in the present invention was purchased from Shanghai Yuejiang Titanium Dioxide Chemical Products Co., Ltd.; the calcium carbonate with a particle size of 400 meshes was purchased from Shanghai Yuejiang Titanium Dioxide Chemical Products Co., Ltd.; and the calcium carbonate with a particle size of 800 meshes was purchased from Shanghai Yuejiang Titanium Dioxide Chemical Products Co., Ltd.

[0030] Polyolefin elastomer

[0031] In one embodiment, the polyolefin elastomer has a melt index of 25 to 35 g / 10 min.

[0032] Preferably, the melt index of the polyolefin elastomer is 30 g / 10 min.

[0033] In one embodiment, the Shore hardness of the polyolefin elastomer is 65-75.

[0034] Preferably, the polyolefin elastomer has a Shore hardness of 72.

[0035] The test conditions of the Shore hardness of the present invention are Shore A, 1s, and compression molding.

[0036] The polyolefin elastomer with a Shore hardness of 72 and a melt index of 30 g / 10 min of the present invention is purchased from Dongguan Suyu Chemical Co., Ltd. with a brand name of POE8407.

[0037] The applicant unexpectedly discovered that when the melt index of the polyolefin elastomer is 25 to 35 g / 10 min and the Shore hardness is 65 to 75, the mechanical strength of the obtained polypropylene floor is better.

[0038] Coupling agent

[0039] A plastic additive that improves the interface performance between synthetic resin and inorganic filler or reinforcing material in plastic compounding. Also known as surface modifier. It can reduce the viscosity of synthetic resin melt during plastic processing, improve the dispersion of filler to improve processing performance, and thus make the product have good surface quality and mechanical, thermal and electrical properties.

[0040] The dosage is generally 0.5-2% of the filler dosage. The coupling agent is generally composed of two parts: one part is an inorganic-friendly group that can react with inorganic fillers or reinforcing materials; the other part is an organic-friendly group that can react with synthetic resins.

[0041] In one embodiment, the coupling agent includes at least one of a titanate coupling agent, an aluminate coupling agent, and a silane coupling agent.

[0042] Preferably, the coupling agent is a titanate coupling agent; further preferably, the titanate coupling agent includes at least one of TCA-PI2, TAC-KTT2, TCA-KTTO, TCA-K238T, and TCA-L12; more preferably, the titanate coupling agent is TCA-L12.

[0043] The TCA-L12 described in the present invention was purchased from Nanjing Nengde New Material Technology Co., Ltd.

[0044] The applicant found that when the filler is talcum powder, the dimensional stability of the wooden board is better than when the filler is calcium carbonate. However, the price of talcum powder is relatively high. The applicant unexpectedly found that when the particle size of calcium carbonate is controlled, especially when the particle size of calcium carbonate is 325-1250 mesh, especially 325-800 mesh, especially 400 mesh, and the coupling agent is a titanate coupling agent, especially TCA-L12, the dimensional stability of the wooden board is excellent. The dimensional stability of the wooden board will decrease when the particle size increases or decreases. The applicant believes that the possible reason is that during the preparation of the wooden board, the calcium carbonate of 325-1250 mesh can be well dispersed in the system. At the same time, the TCA-L12 titanate coupling agent ensures that the calcium carbonate is evenly wrapped in the middle by polypropylene, and the force is evenly dispersed, thereby ensuring the dimensional stability of the wooden board.

[0045] Lubricants

[0046] In one embodiment, the lubricant includes at least one of stearic acid, paraffin, PE wax, oxidized PE wax, stearate, monoglyceride, PETS, EBS, and TAF lubricants.

[0047] Preferably, the lubricant is PE wax.

[0048] The PE wax of the present invention was purchased from Ningbo Beitian Chemical Co., Ltd., and the model number was PE-110.

[0049] Antioxidants

[0050] Antioxidants are substances that prevent the adverse effects of oxygen. They are a type of substance that can help capture and neutralize free radicals, thereby eliminating the damage caused by free radicals to the human body.

[0051] In one embodiment, the antioxidant is selected from a combination of one or more of antioxidant 1010, antioxidant 168, and antioxidant JT168.

[0052] Preferably, the antioxidant is antioxidant JT168.

[0053] The antioxidant JT168 described in the present invention was purchased from Changzhou Jiatong Chemical Co., Ltd.

[0054] The test conditions of the melt index of the present invention are 190° C. and 2.16 Kg.

[0055] The second aspect of the present invention provides a method for preparing a polypropylene floor, which comprises: placing the raw materials for preparing the polypropylene floor in a high-speed mixer and mixing them at high speed, then putting them into a twin-screw extruder, and directly extruding and molding them.

[0056] Example

[0057] Hereinafter, the present invention is described in more detail by examples, but it should be understood that these examples are merely illustrative and non-restrictive. If there is no other explanation, the raw materials used in the following examples are all commercially available.

[0058] Example 1

[0059] Example 1 of the present invention provides a polypropylene floor, wherein the raw materials for preparing the floor include, by weight, 25 parts of polypropylene, 55 parts of filler, 1 part of polyolefin elastomer, 1 part of coupling agent, 0.1 part of antioxidant and 0.5 part of lubricant.

[0060] The polypropylene was purchased from Zhejiang Chuangjin Petrochemical Co., Ltd. with the brand name PP 3015; the filler was calcium carbonate with a particle size of 325 mesh, purchased from Shanghai Yuejiang Titanium Dioxide Chemical Products Co., Ltd.; the polyolefin elastomer was purchased from Dongguan Suyu Chemical Co., Ltd. with the brand name POE8407; the coupling agent was TCA-L12; the lubricant was PE wax, purchased from Ningbo Beitian Chemical Co., Ltd. with the model name PE-110; the antioxidant was antioxidant JT168, purchased from Changzhou Jiatong Chemical Co., Ltd.

[0061] The preparation method of the polypropylene floor comprises: placing the raw materials for preparing the polypropylene floor in a high-speed mixer and mixing them evenly at high speed, then putting them into a double-screw extruder and directly extruding and molding them to obtain the polypropylene floor.

[0062] Example 2

[0063] Example 2 of the present invention provides a polypropylene floor, wherein the raw materials for preparing the floor include, by weight, 35 parts of polypropylene, 65 parts of filler, 3 parts of polyolefin elastomer, 3 parts of coupling agent, 1 part of antioxidant and 3 parts of lubricant.

[0064] The polypropylene was purchased from Suzhou Sujilongye International Trade Co., Ltd. with the brand name PP 3040; the filler was calcium carbonate with a particle size of 800 mesh, purchased from Shanghai Yuejiang Titanium Dioxide Chemical Products Co., Ltd.; the polyolefin elastomer was purchased from Dongguan Suyu Chemical Co., Ltd. with the brand name POE8407; the coupling agent was TCA-L12; the lubricant was PE wax, purchased from Ningbo Beitian Chemical Co., Ltd. with the model name PE-110; the antioxidant was antioxidant JT168, purchased from Changzhou Jiatong Chemical Co., Ltd.

[0065] The specific implementation method of the preparation method of the polypropylene floor is the same as that of Example 1.

[0066] Example 3

[0067] Example 3 of the present invention provides a polypropylene floor, wherein the raw materials for preparing the floor include, by weight, 30 parts of polypropylene, 60 parts of filler, 2 parts of polyolefin elastomer, 2 parts of coupling agent, 0.5 parts of antioxidant and 1.5 parts of lubricant.

[0068] The polypropylene was purchased from Beijing Kunpeng Chemical Co., Ltd. with the brand name K8003; the filler was calcium carbonate with a particle size of 400 mesh, purchased from Shanghai Yuejiang Titanium Dioxide Chemical Products Co., Ltd.; the polyolefin elastomer was purchased from Dongguan Suyu Chemical Co., Ltd. with the brand name POE8407; the coupling agent was TCA-L12; the lubricant was PE wax, purchased from Ningbo Beitian Chemical Co., Ltd. with the model name PE-110; the antioxidant was antioxidant JT168, purchased from Changzhou Jiatong Chemical Co., Ltd.

[0069] The specific implementation method of the preparation method of the polypropylene floor is the same as that of Example 1.

[0070] Example 4

[0071] Example 4 of the present invention provides a polypropylene floor, and its specific implementation method is the same as that of Example 3, except that the mesh size of the calcium carbonate is 1250 meshes, which is purchased from Shanghai Yuejiang Titanium Dioxide Chemical Products Co., Ltd.

[0072] The specific implementation method of the preparation method of the polypropylene floor is the same as that of Example 1.

[0073] Example 5

[0074] Example 5 of the present invention provides a polypropylene floor, and its specific implementation is the same as that of Example 3, except that the mesh size of the calcium carbonate is 200 meshes, purchased from Changxing Longfeng Powder Material Co., Ltd., model P20.

[0075] The specific implementation method of the preparation method of the polypropylene floor is the same as that of Example 1.

[0076] Example 6

[0077] Example 6 of the present invention provides a polypropylene floor, and its specific implementation is the same as that of Example 3, except that the coupling agent is silane coupling agent KH550.

[0078] The specific implementation method of the preparation method of the polypropylene floor is the same as that of Example 1.

[0079] Example 7

[0080] Example 7 of the present invention provides a polypropylene floor, and its specific implementation is the same as that of Example 3, except that the melt index of the polypropylene is 100 g / 10 min.

[0081] The specific implementation method of the preparation method of the polypropylene floor is the same as that of Example 1.

[0082] Example 8

[0083] Example 8 of the present invention provides a polypropylene floor, and its specific implementation method is the same as that of Example 3, except that the polyacrylic acid has a melt index of 0.8 g / 10 min and is purchased from Ningbo Juxin Plastic Co., Ltd. with a brand name of PP5012XT.

[0084] The specific implementation method of the preparation method of the polypropylene floor is the same as that of Example 1.

[0085] Example 9

[0086] Example 9 of the present invention provides a polypropylene floor, and its specific implementation method is the same as that of Example 3, except that the mesh size of the calcium carbonate is 2500 meshes, which is purchased from Shanggao County Huagui Mining Co., Ltd.

[0087] The specific implementation method of the preparation method of the polypropylene floor is the same as that of Example 1.

[0088] Performance Evaluation

[0089] 1. Heating dimensional change rate: The heating dimensional change rate of the polypropylene floor panels obtained in Examples 1 to 9 was tested according to DIN EN ISO 23999 standard.

[0090] 2. Heating warpage: The heating warpage of the polypropylene floor panels obtained in Examples 1 to 9 was tested according to ISO 23999 standard.

[0091] 3. Density: The density of the polypropylene flooring obtained in Examples 1 to 3 was tested according to EN436 standard.

[0092] 4. Warping at room temperature: The warping at room temperature of the polypropylene floor panels obtained in Examples 1 to 3 was tested; the test conditions were: temperature of 23±2° C., humidity of 50±5%.

[0093] Table 1

[0094]

[0095] It can be seen from the test results in Table 1 that the polypropylene floor provided by the present invention has excellent dimensional stability and heat resistance, and its service life is extended.

[0096] The foregoing examples are merely illustrative and are used to explain some features of the method of the present invention. The appended claims are intended to claim the widest possible range that can be conceived, and the embodiments presented herein are only illustrations of selected implementations according to the combination of all possible embodiments. Therefore, it is the applicant's intention that the appended claims are not limited by the selection of examples that illustrate the features of the present invention. Some numerical ranges used in the claims also include sub-ranges within them, and changes in these ranges should also be interpreted as being covered by the appended claims where possible.

Claims

1. A polypropylene floor, characterized in that: The raw materials for its preparation include 30 parts of polypropylene, 60 parts of filler, 2 parts of polyolefin elastomer, 2 parts of coupling agent, 0.5 parts of antioxidant and 1.5 parts of lubricant by weight; the polypropylene is purchased from Beijing Kunpeng Chemical Co., Ltd. with the brand name K8003; the filler is calcium carbonate with a particle size of 400 mesh, purchased from Shanghai Yuejiang Titanium Dioxide Chemical Products Co., Ltd.; the polyolefin elastomer is purchased from Dongguan Suyu Chemical Co., Ltd. with the brand name POE8407; the coupling agent is TCA-L12; the lubricant is PE wax, purchased from Ningbo Beitian Chemical Co., Ltd. with the model name PE-110; the antioxidant is antioxidant JT168, purchased from Changzhou Jiatong Chemical Co., Ltd.

2. A method for preparing the polypropylene floor according to claim 1, characterized in that: It includes: The raw materials for preparing the polypropylene floor are placed in a high-speed mixer and mixed evenly at high speed, and then put into a twin-screw extruder for direct extrusion molding to obtain the floor.

Images