Composite binding material as well as preparation method and application thereof

Abstract

The invention provides a composite binding material as well as a preparation method and application thereof. The composite binding material is prepared from the following raw materials in parts by weight: 40-95 parts of POE (Polyolefin Elastomer), 5-60 parts of styrene and 0.3-2 parts of an initiator. The composite binding material provided by the invention can be used as a binding medium to well bind a polyethylene material and a styrene polymer, and a polyethylene / styrene polymer composite material with good comprehensive performance is obtained.

Description

Technical Field

[0001] The present invention relates to the technical field of polymer materials, and more particularly to a composite bonding material and a preparation method and application thereof. Background Art

[0002] Styrene polymers such as HIPS, PS / SBS, SEBS, etc. have excellent impact resistance, are easy to process, and have low cost. They are widely used in packaging films, sheets or plates, etc. However, their poor chemical resistance limits their application.

[0003] Polyethylene is a thermoplastic resin with excellent chemical stability, electrical insulation and corrosion resistance, but its rigidity and impact strength are poor, which limits its application in the field of packaging materials.

[0004] In order to obtain materials with excellent comprehensive performance, polyethylene and styrene polymers can be used together to make films or plates to give full play to the advantages of the two materials. However, the technology of polyethylene / styrene polymer composites faces challenges and constraints. Due to the large differences in the physical and chemical properties of polyethylene and styrene polymers, the compatibility and interfacial bonding of the two materials are poor, and problems such as phase separation and interlayer peeling are prone to occur. Summary of the invention

[0005] To solve the above problems, the present invention provides a composite bonding material and a preparation method thereof. The composite bonding material as a bonding medium can better bond polyethylene materials and styrene polymers, thereby obtaining a polyethylene / styrene polymer composite material with better comprehensive performance.

[0006] Firstly, one of the objects of the present invention is to provide a composite bonding material.

[0007] Specifically, the composite bonding material is prepared from raw materials including POE, styrene, and an initiator. Taking the total weight of POE and styrene as 100 parts by weight, the weight parts of each component are:

[0008] POE 40-95 parts by weight;

[0009] 5-60 parts by weight of styrene;

[0010] Initiator 0.3 to 2 parts by weight.

[0011] Preferably, the weight proportions of the components are:

[0012] POE 50-90 parts by weight;

[0013] 10 to 50 parts by weight of styrene;

[0014] Initiator 0.5-1.5 parts by weight.

[0015] Preferably, POE is selected from a copolymer of ethylene and at least one of 1-butene, 1-hexene or 1-octene. More preferably, the melt index of POE is 0.5-5 g / 10 min (test conditions are 190° C., 2.16 kg), and the density is 0.865-0.870 g / cm 3 .

[0016] Preferably, the initiator is selected from free radical initiators, more preferably one or a combination of dibenzoyl peroxide (BPO), azobisisobutyl cyanide (AIBN), and dicumyl peroxide (DCP).

[0017] It is worth mentioning that the styrene monomer forms a graft polymerization with the POE material through an initiator and forms a chemical bond with the POE material. Therefore, the polystyrene (PS) in the formed adhesive material is compatible with styrene polymers, and the POE in the adhesive material is compatible with polyethylene, thereby better bonding the polyethylene material and the styrene polymer together to obtain a polyethylene / styrene polymer composite material with better comprehensive performance.

[0018] Secondly, the second object of the present invention is to provide a method for preparing the composite bonding material of one of the objects of the present invention.

[0019] Specifically, the method includes the following steps: firstly, mixing and dissolving styrene and an initiator, then adding POE, heating to 45-55°C, and after all the styrene is absorbed by POE, heating to 87-93°C, reacting for 85-95 minutes, and obtaining the composite adhesive material.

[0020] Again, the third object of the present invention is to provide an application of the composite bonding material of one of the objects of the present invention.

[0021] Specifically, the composite adhesive material of one purpose of the present invention is used to bond polyethylene sheets and styrene polymer sheets, or the composite adhesive material of one purpose of the present invention is melt-mixed with a styrene polymer and then used to bond polyethylene sheets to obtain a polyethylene / styrene polymer composite material.

[0022] The composite bonding material of one of the purposes of the present invention can bond polyethylene material and styrene polymer together to form a polyethylene / styrene polymer composite material with good comprehensive performance.

[0023] Furthermore, the application method of the composite bonding material comprises the following steps:

[0024] The polyethylene material, the composite adhesive material and the styrene polymer are respectively hot-pressed into sheets with a thickness of 0.3 to 1.5 mm, and then the composite adhesive material sheet is placed between the polyethylene material sheets and / or the styrene polymer sheets, and hot-pressed to obtain a polyethylene / styrene polymer composite material.

[0025] Preferably, the hot pressing temperature is 165-195°C; more preferably 170-190°C.

[0026] In a preferred embodiment of the present invention, the method for applying the composite bonding material comprises the following steps:

[0027] The polyethylene material, the composite adhesive material and the styrene polymer are respectively pressed into sheets with a thickness of 0.3 to 1.5 mm; and cut into the same size; and then the composite adhesive material sheet is placed in the middle layer, and the polyethylene material and the styrene polymer sheets are placed in the upper and lower layers respectively, and hot pressing is performed to obtain a polyethylene / styrene polymer composite material.

[0028] Furthermore, the application method of the composite bonding material comprises the following steps:

[0029] The composite adhesive material and the styrene polymer material are first melt-blended to obtain a blend; the polyethylene material and the blend are then pressed into sheets with a thickness of 0.3 mm to 1.5 mm respectively, and the blend sheet is placed between polyethylene material sheets, and hot-pressed to obtain a polyethylene / styrene polymer composite material.

[0030] In another preferred embodiment of the present invention, the method for applying the composite bonding material comprises the following steps:

[0031] The composite adhesive material and the styrene polymer material are first melt-blended to obtain a blend; the polyethylene material and the blend are then pressed into sheets respectively; the sheets are cut into the same size; the blend sheet is then placed in the middle layer, and the polyethylene material sheets are placed in the upper and lower layers respectively, and hot-pressed to obtain a polyethylene / styrene polymer composite material.

[0032] Preferably, the weight ratio of the composite adhesive material to the styrene polymer material is (1:1) to (1:8); preferably (1:1) to (1:6).

[0033] Preferably, the hot pressing temperature is 165-195°C; more preferably 170-190°C.

[0034] Preferably, the polyethylene material is selected from one or a combination of low-density polyethylene material (LDPE) and linear low-density polyethylene material (LLDPE).

[0035] Preferably, the styrene polymer is selected from one or a combination of high impact polystyrene (HIPS), PS / SEBS blends, and PS / SBS ​​blends.

[0036] Compared with the prior art, the beneficial effects of the present invention are:

[0037] The present invention provides an adhesive material capable of realizing composite of polyethylene and styrene polymer sheets. The composite sheet material of polyethylene and styrene polymer obtained by the adhesive material has good interface bonding force, thus overcoming the problem that polyethylene and styrene polymer sheets cannot be composited. DETAILED DESCRIPTION

[0038] The present invention is described in detail below in conjunction with specific embodiments. It is necessary to point out that the following embodiments are only used to further illustrate the present invention and cannot be understood as limiting the scope of protection of the present invention. Some non-essential improvements and adjustments made to the present invention by those skilled in the art based on the contents of the present invention still fall within the scope of protection of the present invention.

[0039] In the following examples and comparative examples, the raw materials are all derived from commercially available products, as follows:

[0040] POE material (LC565) was purchased from LG Chem. The melt index of the purchased POE was 0.5-5 g / 10 min (test conditions were 190 ° C, 2.16 kg), and the density was 0.865-0.870 g / cm 3

[0041] Benzoyl peroxide (BPO) was purchased from AKZO NONEL;

[0042] Linear low-density polyethylene material (LLDPE) is purchased from Sinopec;

[0043] High-impact polystyrene (HIPS) is purchased from Chi Mei Chemical;

[0044] PS / SEBS blends were purchased from Ningbo Huateng Shouyan New Materials Co., Ltd.

[0045] The peel strength in the following examples and comparative examples was tested according to the test method of GB 8808-1988 “Peel test method for soft composite plastic materials”.

[0046] Example 1

[0047] This example is used to illustrate the preparation method of the composite bonding material. The raw materials and weight parts used are shown in Table 1. The specific steps are as follows:

[0048] Add styrene to the stirring tank, then add the initiator and start stirring until the initiator is completely dissolved in the styrene. Then add the POE material and raise the temperature to 50°C until the styrene is completely absorbed by the POE. Raise the temperature to 90°C and continue for 1.5 hours. Take out the material, cut into pellets and set aside.

[0049] Embodiments 2 to 4

[0050] The preparation methods of the composite bonding materials of Examples 2 to 4 are the same as the preparation method of the composite bonding material of Example 1. The raw materials used and their weight parts are shown in Table 1.

[0051] Table 1 shows the raw materials and weight parts used in the above Examples 1 to 4.

[0052] Table 1:

[0053] Example 1 Example 2 Example 3 Example 4 Styrene 10 25 35 50 POE(LC565) 90 75 65 50 Benzoyl peroxide (BPO) 0.5 0.8 1.1 1.5

[0054] Application Example 1

[0055] This application example is used to illustrate the use of the composite bonding material of Example 1 to bond linear low-density polyethylene (LLDPE) and high-impact polystyrene (HIPS) materials to form a polyethylene / styrene polymer composite material. The specific steps are as follows:

[0056] Step 1: Place LLDPE, the composite adhesive material of Example 1, and HIPS in a molding machine respectively, and heat-press them at 185° C. into sheets with a size of 200 mm*200 mm*0.7 mm;

[0057] Step 2: Cut the above sheets into sheets with a size of 100 mm*100 mm*0.7 mm respectively;

[0058] Step 3: stack the above sheets, with the adhesive material sheet in the middle layer, and the LLDPE and HIPS sheets in the upper and lower layers respectively, place them in a molding machine, and hot-press at 185° C. to obtain a polyethylene / styrene polymer composite material.

[0059] Application Example 2

[0060] This application example is used to illustrate the use of the composite adhesive material of Example 2 to bond linear low-density polyethylene (LLDPE) and high-impact polystyrene (HIPS) materials to form a polyethylene / styrene polymer composite material. The specific steps and processes are the same as those of Application Example 1.

[0061] Application Example 3

[0062] This application example is used to illustrate the use of the composite adhesive material of Example 3 to bond linear low-density polyethylene (LLDPE) and high-impact polystyrene (HIPS) materials to form a polyethylene / styrene polymer composite material. The specific steps and processes are the same as those of Application Example 1.

[0063] Application Example 4

[0064] This application example is used to illustrate the use of the composite adhesive material of Example 4 to bond linear low-density polyethylene (LLDPE) and high-impact polystyrene (HIPS) materials to form a polyethylene / styrene polymer composite material. The specific steps and processes are the same as those of Application Example 1.

[0065] Comparative Application Examples

[0066] This comparative application example is used to illustrate the direct use of linear low-density polyethylene (LLDPE) and high-impact polystyrene (HIPS) materials for hot pressing to form a polyethylene / styrene polymer composite material without using any composite bonding material.

[0067] Table 2 shows the results of peel strength tests on the polyethylene / styrene polymer composite materials prepared according to Examples 1 to 4 and Comparative Application Examples.

[0068] Table 2:

[0069] Adhesive layer Application Example 1 Application Example 2 Application Example 3 Application Example 4 Comparative application example 1 Peel strength(N) 9 10 13 19 0, two layers failed to bond

[0070] The peel strength characterizes the composite bonding strength of the composite sheet. The greater the peel force value, the higher the composite bonding strength. It can be seen from the data in Table 2 that the composite materials obtained by bonding using composite adhesive materials in Application Examples 1 to 4 all have high peel strength values. At the same time, as the content of polystyrene (PS) in the composite adhesive material increases, the bonding strength of the prepared polyethylene / styrene polymer composite material increases accordingly. When the comparative application example did not use a composite adhesive material, the peel force was 0 after the LLDPE sheet and the HIPS sheet were directly hot-pressed and composited, indicating that the two could not be bonded and composited to form a composite material.

[0071] Application Example 5

[0072] This application example is used to illustrate that the composite adhesive material of Example 1 is first melt-blended with a high-impact polystyrene (HIPS) material at a weight ratio of 1:1, and then bonded with a linear low-density polyethylene (LLDPE) to form a polyethylene / styrene polymer composite material. The specific steps are as follows:

[0073] Step 1: melt-blending the composite adhesive material of Example 1 and HIPS to obtain a blend;

[0074] Step 2: Place LLDPE and the blend prepared in step 1 in a molding machine respectively, and heat-press them at 190° C. into sheets with a size of 200 mm*200 mm*0.7 mm;

[0075] Step 3, cutting the above sheets into sheets with a size of 100mm*100mm*0.7mm respectively;

[0076] Step 4: stack the above sheets, with the blend sheet in the middle layer and the LLDPE sheets in the upper and lower layers, place them in a molding machine, and perform hot pressing at 190° C. to obtain a polyethylene / styrene polymer composite material.

[0077] Application Example 6

[0078] This application example is used to illustrate that the composite adhesive material of Example 2 is first melt-blended with a high-impact polystyrene (HIPS) material in a weight ratio of 1:1, and then bonded with a linear low-density polyethylene (LLDPE) to form a polyethylene / styrene polymer composite material. The specific steps and process are the same as those of Application Example 5.

[0079] Application Example 7

[0080] This application example is used to illustrate that the composite adhesive material of Example 3 is first melt-blended with a high-impact polystyrene (HIPS) material in a weight ratio of 1:1, and then bonded with a linear low-density polyethylene (LLDPE) to form a polyethylene / styrene polymer composite material. The specific steps and process are the same as those of Application Example 5.

[0081] Application Example 8

[0082] This application example is used to illustrate that the composite adhesive material of Example 4 is first melt-blended with a high-impact polystyrene (HIPS) material in a weight ratio of 1:1, and then bonded with a linear low-density polyethylene (LLDPE) to form a polyethylene / styrene polymer composite material. The specific steps and process are the same as those of Application Example 5.

[0083] Application Example 9

[0084] This application example is used to illustrate that the composite adhesive material of Example 2 is first melt-blended with a high-impact polystyrene (HIPS) material in a weight ratio of 2:3, and then bonded with a linear low-density polyethylene (LLDPE) to form a polyethylene / styrene polymer composite material. The specific steps and process are the same as those of Application Example 5.

[0085] Application Example 10

[0086] This application example is used to illustrate that the composite adhesive material of Example 2 is first melt-blended with a high-impact polystyrene (HIPS) material in a weight ratio of 1:2, and then bonded with a linear low-density polyethylene (LLDPE) to form a polyethylene / styrene polymer composite material. The specific steps and process are the same as those of Application Example 5.

[0087] Table 3 shows the results of peel strength tests on the polyethylene / styrene polymer composites prepared according to Examples 5 to 10.

[0088] Table 3:

[0089] Application Example 5 Application Example 6 Application Example 7 Application Example 8 Application Example 9 Application Example 10 Peel strength(N) 10 10 19 21 8 4

[0090] From the data in Table 3, it can be seen that after the composite adhesive material is first melt-blended with high impact polystyrene (HIPS) and then bonded with linear low density polyethylene (LLDPE) to form a polyethylene / styrene polymer composite material, it also has a high peel strength value; This shows that while reducing the amount of composite adhesive material, the bonding of the composite material can also be better achieved.

[0091] Application Example 11

[0092] This application example is used to illustrate that the composite adhesive material of Example 2 is first melt-blended with a styrene polymer (PS / SEBS mixture, wherein the PS / SEBS ratio is 6 / 4) material at a weight ratio of 1:2, and then bonded with a linear low-density polyethylene (LLDPE) to form a polyethylene / styrene polymer composite material. The specific steps and process are the same as those of Application Example 5.

[0093] Application Example 12

[0094] This application example is used to illustrate that the composite adhesive material of Example 2 is first melt-blended with a styrene polymer (PS / SEBS mixture, wherein the PS / SEBS ratio is 6 / 4) material at a weight ratio of 1:4, and then bonded with a linear low-density polyethylene (LLDPE) to form a polyethylene / styrene polymer composite material. The specific steps and process are the same as those of Application Example 5.

[0095] Application Example 13

[0096] This application example is used to illustrate that the composite adhesive material of Example 2 is first melt-blended with a styrene polymer (PS / SEBS mixture, wherein the PS / SEBS ratio is 6 / 4) material at a weight ratio of 1:6, and then bonded with a linear low-density polyethylene (LLDPE) to form a polyethylene / styrene polymer composite material. The specific steps and process are the same as those of Application Example 5.

[0097] Table 4 shows the results of peel strength tests on the polyethylene / styrene polymer composites prepared according to Examples 11 to 13.

[0098] Table 4:

[0099] Adhesive layer Application Example 11 Application Example 12 Application Example 13 Peel strength(N) 18 13 8

[0100] It can be seen from the data in Table 4 that the polyethylene / styrene polymer composite materials prepared in Application Examples 11 to 13 all have relatively high peel strength values.

[0101] The preferred embodiments of the present invention are described in detail above, but the present invention is not limited thereto. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications, including the combination of various technical features in any other suitable manner, and these simple modifications and combinations should also be regarded as the contents disclosed by the present invention and belong to the protection scope of the present invention.

Claims

1. A composite adhesive material, prepared from raw materials including POE, styrene, and an initiator, wherein the total weight of the POE and styrene is 100 parts by weight, and the weight of each component is: POE 40-95 parts by weight; 5-60 parts by weight of styrene; Initiator 0.3 to 2 parts by weight.

2. The composite bonding material according to claim 1, characterized in that: Taking the total weight of POE and styrene as 100 parts by weight, the weight parts of each component are: POE 50-90 parts by weight; 10 to 50 parts by weight of styrene; Initiator 0.5-1.5 parts by weight.

3. The composite bonding material according to claim 1, characterized in that: The POE is selected from a copolymer of ethylene and at least one of 1-butene, 1-hexene or 1-octene; and / or, The initiator is selected from free radical initiators, preferably one or a combination of dibenzoyl peroxide, azobisisobutylcyanide, and dicumyl peroxide.

4. The method for preparing the composite bonding material according to any one of claims 1 to 3, comprising the following steps: First, styrene and an initiator are mixed and dissolved, and then POE is added, and the temperature is raised to 45-55° C. After all the styrene is absorbed by POE, the temperature is heated to 87-93° C. and the reaction is carried out for 85-95 minutes to obtain the composite adhesive material.

5. Use of the composite adhesive material according to any one of claims 1 to 3, wherein the composite adhesive material is used to bond polyethylene sheets and styrene polymer sheets, or the composite adhesive material is melt-mixed with a styrene polymer and then used to bond polyethylene sheets to obtain a polyethylene / styrene polymer composite material.

6. The use of the composite bonding material according to claim 5, characterized in that: The application method comprises the following steps: hot pressing polyethylene material, composite adhesive material and styrene polymer into sheets with a thickness of 0.3 to 1.5 mm respectively, placing the composite adhesive material sheet between the polyethylene material sheet and / or the styrene polymer sheet, and hot pressing to obtain a polyethylene / styrene polymer composite material.

7. The use of the composite bonding material according to claim 6, characterized in that: The hot pressing temperature is 165-195°C, preferably 170-190°C.

8. The use of the composite bonding material according to claim 5, characterized in that: The application method comprises the following steps: firstly melt-blending the composite adhesive material and the styrene polymer material to obtain a blend; then respectively pressing the polyethylene material and the blend into sheets with a thickness of 0.3 mm to 1.5 mm; then placing the blend sheet between polyethylene material sheets, and hot-pressing to obtain a polyethylene / styrene polymer composite material.

9. The use of the composite bonding material according to claim 8, characterized in that: The weight ratio of the composite adhesive material to the styrene polymer material is (1:1) to (1:8); preferably (1:1) to (1:6); and / or, The hot pressing temperature is 165-195°C, preferably 170-190°C.

10. The use of the composite bonding material according to claim 6 or 8, characterized in that: The polyethylene material is selected from one or a combination of low-density polyethylene materials and linear low-density polyethylene materials; and / or the styrene polymer is selected from one or a combination of high-impact polystyrene, PS / SEBS blends, and PS / SBS ​​blends.