CN112662044B - Flexible easy-adhesion waterproof material and preparation method thereof - Google Patents
Flexible easy-adhesion waterproof material and preparation method thereof Download PDFInfo
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Abstract
The invention provides a flexible easy-bonding waterproof material and a preparation method thereof, wherein the flexible easy-bonding waterproof material comprises the following components in parts by weight: 30-100 parts of polyolefin, 1-15 parts of ethylene-acrylate rubber, 2-40 parts of vinyl-terminated methyl vinyl silicone rubber, 8-50 parts of ethylene-vinyl acetate copolymer, 0.05-5 parts of cross-linking agent, 0.2-5 parts of auxiliary cross-linking agent, 0.005-0.5 part of sulfur and 0.005-0.2 part of accelerator. According to the flexible easy-adhesion waterproof material and the preparation method thereof, the polyolefin, the ethylene-acrylate rubber, the vinyl-terminated methyl vinyl silicone rubber, the ethylene-vinyl acetate copolymer and other materials are subjected to chemical reaction through the cross-linking agent and the auxiliary cross-linking agent in a specific proportion and in a specific process, and through the mutual synergistic effect of the components, the hardness of the obtained polyethylene waterproof board is reduced, and the flexibility is improved; the easy adhesion performance is improved; the difference between the longitudinal mechanical property and the transverse mechanical property is reduced.
Description
Technical Field
The invention belongs to the technical field of waterproof materials, and particularly relates to a flexible easy-adhesion waterproof material and a preparation method thereof.
Background
The polyethylene waterproof material is mainly used for the base surface waterproof treatment in water conservancy and civil engineering, is widely applied to the fields of buildings, subways, tunnels, engineering buildings and the like, and is an excellent anti-seepage material. The polyethylene waterproof material can be directly prepared into a waterproof sheet which is used as a waterproof layer, the thickness is generally 0.8mm-3.0mm, and the polyethylene waterproof material can also be compounded with hot melt pressure sensitive adhesive to be prepared into a base material of a high polymer self-adhesive film product, and the thickness is 0.8-1.5 mm. However, since the polyethylene material is hard, the ball indentation hardness is 20N/mm2In the above way, when the construction is carried out in the region with large internal and external corners or radian, the back cavity is not easy to be tightly adhered to the base surface and is easy to form; meanwhile, the polyethylene contains nonpolar molecules, the surface of the material is inert, the material is not easy to be bonded with other materials, and the bonding performance is poor; polyethylene belongs to a high-crystallinity polymer, molecular chain orientation is obvious in the extrusion production process, so that the difference between longitudinal mechanical property and transverse mechanical property is overlarge, material cost is wasted, even partial manufacturers steal labor and reduce materials, only the longitudinal mechanical property meets the design requirement, safety risks exist in the use process of the material, and the application of the material is limited.
Therefore, it is needed to provide a polyethylene waterproof material, which can solve the following three problems of the existing materials: 1. the waterproof sheet has high hardness and poor flexibility when used as a waterproof sheet; 2. the adhesive is not easy to be bonded with other materials; 3. the difference between the longitudinal mechanical property and the transverse mechanical property is too large.
Disclosure of Invention
The invention solves the technical problem of providing a flexible and easily-adhered waterproof material and a preparation method thereof, wherein polyolefin, ethylene-acrylate rubber, vinyl-terminated methyl vinyl silicone rubber, ethylene-vinyl acetate copolymer and other materials are subjected to chemical reaction by a cross-linking agent and an auxiliary cross-linking agent in a specific proportion and process, and the obtained polyethylene waterproof board has reduced hardness and improved flexibility through the mutual synergistic effect of the components; the easy bonding performance is improved; the difference between the longitudinal mechanical property and the transverse mechanical property is reduced.
In order to solve the problems, one aspect of the invention provides a flexible easy-bonding waterproof material, which comprises the following raw materials in parts by weight:
30-100 parts of polyolefin, 1-15 parts of ethylene-acrylate rubber, 2-40 parts of vinyl-terminated methyl vinyl silicone rubber, 8-50 parts of ethylene-vinyl acetate copolymer, 0.05-5 parts of cross-linking agent, 0.2-5 parts of auxiliary cross-linking agent, 0.005-0.5 part of sulfur and 0.005-0.2 part of accelerator.
According to the invention, polyolefin, ethylene-acrylate rubber, vinyl-terminated methyl vinyl silicone rubber, ethylene-vinyl acetate copolymer and other materials are subjected to chemical reaction with the vinyl-terminated methyl vinyl silicone rubber through a cross-linking agent and an auxiliary cross-linking agent in a specific proportion and process to form a 1 st network, then the cross-linking agent, sulfur and an accelerator are subjected to vulcanization reaction with the ethylene-acrylate rubber to form a 2 nd network, the 1 st network and the 2 nd network are in an interpenetrating network blending state, the interpenetrating blending state of the two networks is separated from each other in structure, the two networks can generate a synergistic effect, the strength of the network structure is improved, the structure and mechanical properties of the waterproof material are optimal, and the longitudinal and transverse mechanical properties are basically consistent.
Preferably, the preparation raw materials comprise the following components in parts by weight:
65-85 parts of polyolefin, 3-8 parts of ethylene-acrylate rubber, 6-20 parts of vinyl-terminated methyl vinyl silicone rubber, 15-25 parts of ethylene-vinyl acetate copolymer, 0.1-2 parts of cross-linking agent, 0.5-2 parts of auxiliary cross-linking agent, 0.01-0.2 part of sulfur and 0.01-0.1 part of accelerator.
Through a great deal of experimental research, the applicant finds that the components in the composition are more than at least ten, and the components do not simply provide characteristics with respective performances, but can exert the synergistic effect among the components to the maximum extent through proper interaction among the components within a certain mass ratio range, so that the product obtains better technical effects. Furthermore, in the preparation process, the individual components and the mass ratios between the components play a very important role in the overall process. Due to the numerous components, the dosage of each specific component is adjusted, and the components can better play the role of the composition only when the components are within the specific content range, so that the performance of the obtained product is better. Generally, for a formula involving the combined action of a plurality of components like this, a person skilled in the art cannot determine which factor causes the technical solution failure before obtaining the technical solution, and therefore, it is difficult to obtain the flexible easy-to-bond waterproof material of the performance index of the present application through simple limited experiments. That is, the inventors paid creative efforts to find the ratio between the components of the present application.
Preferably, the preparation raw materials also comprise 0.2-4 parts of antioxidant according to the mass parts.
Preferably, the polyolefin is one or a mixture of two of linear low density polyethylene and high density polyethylene; the melt flow rate of the polyolefin is 1 to 10g/10 min.
Further preferably, the polyolefin is a blend of linear low density polyethylene and high density polyethylene. In the research of the present application, it was particularly unexpected to find that the polyolefin has higher mechanical strength by using linear low density polyethylene and high density polyethylene.
Preferably, the ethylene-acrylic ester rubber is ethylene-methyl acrylate rubber, and the content of methyl acrylate in the ethylene-methyl acrylate rubber is 15% -30%; the melt flow rate of the ethylene-methyl acrylate rubber is 2-5g/10 min. The content of methyl acrylate and the melt flow rate are selected, so that the easy adhesion of the base material can be improved, and the proper melt flow rate ensures better compatibility with the base material in the extrusion production process.
Preferably, the vinyl-terminated methyl vinyl silicone rubber has a molecular weight of 45 to 60 ten thousand; the vinyl-terminated methyl vinyl silicone rubber contains 0.03-0.8% of vinyl. If the vinyl content is too low, the crosslinked network is incomplete and cannot provide effective mechanical support; if the vinyl content is too high, the crosslinking points are too dense, and the colloid brittleness is stronger, and researches show that a better crosslinking network can be formed by selecting the vinyl content.
Preferably, in the ethylene-vinyl acetate copolymer, the content of vinyl acetate is 15-45%; the melt flow rate of the ethylene-vinyl acetate copolymer is 5-30g/10 min. The content of the vinyl acetate and the melt flow rate are selected to reduce the high crystallinity of the polyethylene matrix material and reduce the difference of mechanical properties between the longitudinal direction and the transverse direction of the waterproof material.
Preferably, the cross-linking agent is one or a mixture of two of dicumyl peroxide and azobisisobutyronitrile. Dicumyl peroxide (DCP) with molecular formula C18H22O2(ii) a Azobisisobutyronitrile, AIBN for short, molecular formula C8H12N4。
Preferably, the co-crosslinking agent is triallyl isocyanurate. Triallyl isocyanurate, TAIC for short, molecular formula C12H15N3O3。
Preferably, the accelerator is DOTG. DOTG is distinguished by N, N' -di-o-tolylguanidine and molecular formula C15H17N3。
Preferably, the antioxidant is one or a combination of two of the antioxidants 1010 and 168.
Preferably, the antioxidant consists of the following components in parts by mass: 0.1-2 parts of antioxidant 1010 and 0.1-2 parts of antioxidant 168.
Another aspect of the present invention provides a method for preparing the flexible easy-adhesion waterproof material, comprising the following steps:
s1, mixing ethylene-acrylate rubber, an auxiliary crosslinking agent, sulfur and an accelerator, and performing melt extrusion granulation;
s2, blending the product granulated in the step S1, polyolefin, vinyl-terminated methyl vinyl silicone rubber, ethylene-vinyl acetate copolymer and a cross-linking agent, and melting and extruding a sheet to obtain the flexible easily-bonded waterproof material.
Preferably, an antioxidant is further added in step S2 for blending.
Preferably, in step S1, a twin-screw extruder is used for melt extrusion granulation, wherein the temperature in the first zone of the twin-screw extruder is 160-.
Preferably, in step S2, a single-screw extruder is used for melt extrusion of sheets, wherein the temperature of the first zone of the single-screw extruder is 160-170 ℃, the temperature of the second zone to the eighth zone is 180-225 ℃, the temperature of the head is 220-230 ℃, the rotating speed of the host is 10-50r/min, the traction speed is 1-5m/min, and the pressure before the host pump is 1.0-5 MPa; the temperature of the cooling roller is upper roller: 40-45 ℃, middle roller: 55-60 ℃, lower roll: 50-55 ℃.
Compared with the prior art, the invention has the following beneficial effects:
1. the flexible easy-bonding waterproof material of the invention is prepared by the steps of enabling a crosslinking agent and an auxiliary crosslinking agent to react with materials such as polyolefin, ethylene-acrylate rubber, vinyl-terminated methyl vinyl silicone rubber, ethylene-vinyl acetate copolymer and the like in a specific proportion and process to form a No. 1 network, then the cross-linking agent, the sulfur, the accelerant and the ethylene-acrylate rubber are subjected to vulcanization reaction to form a 2 nd network, and the 1 st network and the 2 nd network are in an interpenetrating network blending state, although the two networks are in a network interpenetrating and blending state, the two networks are structurally separated from each other, and can generate a synergistic effect, so that the strength of the network structure is improved, the structure and the mechanical property of the waterproof material are optimal, and the longitudinal and transverse mechanical properties are basically consistent;
2. according to the flexible easy-bonding waterproof material, the appropriate interaction among the components is obtained by reasonably regulating and controlling the mass ratio of the components in the formula, and the synergistic effect among the components is exerted to the maximum extent, so that a product obtained in the preferable formula range has remarkably better tensile strength and tearing strength, and is good in flexibility, low in ball indentation hardness and high in bonding strength with various hot melt adhesives;
3. the flexible easy-bonding waterproof material adopts the mixture of the linear low-density polyethylene and the high-density polyethylene as the polyolefin, and particularly, the polyolefin is unexpectedly found to have higher mechanical strength by adopting the combination of the linear low-density polyethylene and the high-density polyethylene; the content of methyl acrylate in the ethylene-methyl acrylate rubber is regulated to 15-30%, the melt flow rate of the ethylene-methyl acrylate rubber is 2-5g/10min, the easy adhesion of the base material is further improved, and the good compatibility with the base material in the extrusion production process is ensured; the molecular weight of the vinyl-terminated methyl vinyl silicone rubber is regulated to 45-60 ten thousand; the vinyl content in the vinyl-terminated methyl vinyl silicone rubber is selected to be 0.03-0.8%, and if the vinyl content is too low, a crosslinked network is incomplete, so that effective mechanical support cannot be provided; if the vinyl content is too high, the crosslinking points are too dense, the colloid brittleness is strong, and a better crosslinking network can be formed by selecting the vinyl content, so that the product performance is better;
4. the flexible easy-bonding waterproof material adopts the specific extruder temperature, ensures that various raw materials are uniformly plasticized in the extruder, ensures that the chemical reaction of the materials is sufficient and appropriate due to the specific head temperature and the pressure before the host pump, ensures that an interpenetrating network structure is formed between molecules in the plate extrusion cooling process due to the specific cooling roller temperature, and reduces the difference of longitudinal and transverse mechanical properties of the plate.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments of the present invention, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
Example 1
The flexible easy-adhesion waterproof material comprises the following raw materials in parts by mass:
55 parts of linear low-density polyethylene and 10 parts of high-density polyethylene, wherein the melt flow rate is 10g/10 min; 3 parts of ethylene-acrylate rubber, wherein the content of methyl acrylate is 15 percent, and the melt flow rate is 2g/10 min; 6 parts of vinyl-terminated methyl vinyl silicone rubber, wherein the molecular weight of the vinyl-terminated methyl vinyl silicone rubber is 45 ten thousand, and the vinyl content of the vinyl-terminated methyl vinyl silicone rubber is 0.03%; 15 parts of ethylene-vinyl acetate copolymer, wherein the content of vinyl acetate is 15 percent, and the melt flow rate is 5g/10 min; 0.1 part of DCP serving as a crosslinking agent; 0.5 part of assistant crosslinking agent TAIC; 0.01 part of sulfur(s); 0.01 part of accelerator DOTG; 10102 parts of an antioxidant; 1682 parts of antioxidant.
The preparation method of the flexible easy-bonding waterproof material comprises the following steps:
s1, mixing ethylene-acrylate rubber, an auxiliary crosslinking agent, sulfur and an accelerator according to selected mass parts, putting the mixture into a double-screw extruder, and performing melt extrusion and granulation, wherein the process conditions are as follows: the temperature of the first zone is 160 ℃, the temperature of the second zone to the eighth zone is 180-;
s2, blending the product granulated in the step S1, linear low-density polyethylene, high-density polyethylene, vinyl-terminated methyl vinyl silicone rubber, ethylene-vinyl acetate copolymer, a cross-linking agent and an antioxidant, and putting the mixture into a single-screw extruder to melt and extrude a sheet with the thickness of 0.8mm, wherein the process conditions are as follows: the temperature of the first zone is 160 ℃, the temperature of the second zone to the eighth zone is 180-; the temperature of the cooling roller is upper roller: 45 ℃, middle roll: 60 ℃, lower roll: and (5) obtaining the flexible easily-bonded waterproof material at 55 ℃.
Example 2
The flexible easy-adhesion waterproof material comprises the following raw materials in parts by mass:
65 parts of linear low-density polyethylene and 20 parts of high-density polyethylene, wherein the melt flow rate is 1g/10 min; 8 parts of ethylene-acrylate rubber, wherein the content of methyl acrylate is 30 percent, and the melt flow rate is 5g/10 min; 20 parts of vinyl-terminated methyl vinyl silicone rubber, wherein the molecular weight of the vinyl-terminated methyl vinyl silicone rubber is 60 ten thousand, and the vinyl content is 0.8%; 25 parts of ethylene-vinyl acetate copolymer, wherein the content of vinyl acetate is 45 percent, and the melt flow rate is 30g/10 min; 2 parts of crosslinking agent DCP; 2 parts of assistant crosslinking agent TAIC; 0.2 part of sulfur(s); 0.2 part of accelerator DOTG; 10100.1 parts of an antioxidant; 1680.1 parts of antioxidant.
The preparation method of the flexible easy-bonding waterproof material comprises the following steps:
s1, mixing ethylene-acrylate rubber, an auxiliary crosslinking agent, sulfur and an accelerator according to selected mass parts, putting the mixture into a double-screw extruder, and performing melt extrusion and granulation, wherein the process conditions are as follows: the temperature of the first zone is 170 ℃, the temperature of the second zone to the eighth zone is 180-;
s2, blending the product granulated in the step S1, linear low-density polyethylene, high-density polyethylene, vinyl-terminated methyl vinyl silicone rubber, ethylene-vinyl acetate copolymer, a cross-linking agent and an antioxidant, and putting the mixture into a single-screw extruder to perform melt extrusion on a sheet with the thickness of 3mm, wherein the process conditions are as follows: the temperature of the first zone is 170 ℃, the temperature of the second zone to the eighth zone is 180-; the temperature of the cooling roller is upper roller: 40 ℃, middle roll: 55 ℃, lower roll: and (3) obtaining the flexible easily-bonded waterproof material at 50 ℃.
Example 3
The flexible easy-adhesion waterproof material comprises the following raw materials in parts by mass:
40 parts of linear low-density polyethylene and 40 parts of high-density polyethylene, wherein the melt flow rate is 5g/10 min; 6 parts of ethylene-acrylate rubber, wherein the content of methyl acrylate is 20 percent, and the melt flow rate is 2g/10 min; 20 parts of vinyl-terminated methyl vinyl silicone rubber, wherein the molecular weight of the vinyl-terminated methyl vinyl silicone rubber is 50 ten thousand, and the vinyl content of the vinyl-terminated methyl vinyl silicone rubber is 0.4%; 25 parts of ethylene-vinyl acetate copolymer, wherein the content of vinyl acetate is 30 percent, and the melt flow rate is 10g/10 min; 1.8 parts of cross-linking agent AIBN; 1.8 parts of assistant crosslinking agent TAIC; 0.18 part of sulfur(s); 0.18 part of accelerator DOTG; 10101 parts of an antioxidant; 1681 part of antioxidant.
The preparation method of the flexible easy-bonding waterproof material comprises the following steps:
s1, mixing ethylene-acrylate rubber, an auxiliary crosslinking agent, sulfur and an accelerator according to selected mass parts, putting the mixture into a double-screw extruder, and performing melt extrusion and granulation, wherein the process conditions are as follows: the temperature of the first zone is 170 ℃, the temperature of the second zone to the eighth zone is 180-;
s2, blending the product granulated in the step S1, linear low-density polyethylene, high-density polyethylene, vinyl-terminated methyl vinyl silicone rubber, ethylene-vinyl acetate copolymer, a cross-linking agent and an antioxidant, and putting the mixture into a single-screw extruder to perform melt extrusion on a sheet with the thickness of 1.0mm, wherein the process conditions are as follows: the temperature of the first zone is 170 ℃, the temperature of the second zone to the eighth zone is 180-; the temperature of the cooling roller is upper roller: 42 ℃, middle roll: 56 ℃, lower roll: and (4) obtaining the flexible easily-bonded waterproof material at 52 ℃.
Example 4
The flexible easy-adhesion waterproof material comprises the following raw materials in parts by mass:
60 parts of linear low-density polyethylene and 10 parts of high-density polyethylene, wherein the melt flow rate is 5g/10 min; 5 parts of ethylene-acrylate rubber, wherein the content of methyl acrylate is 20 percent, and the melt flow rate is 3.5g/10 min; 15 parts of vinyl-terminated methyl vinyl silicone rubber, wherein the molecular weight of the vinyl-terminated methyl vinyl silicone rubber is 50 ten thousand, and the vinyl content of the vinyl-terminated methyl vinyl silicone rubber is 0.4%; 20 parts of ethylene-vinyl acetate copolymer, wherein the content of vinyl acetate is 26 percent, and the melt flow rate is 20g/10 min; 1.5 parts of cross-linking agent AIBN; 1.5 parts of assistant crosslinking agent TAIC; 0.15 part of sulfur(s); 0.15 part of accelerator DOTG; 10100.8 parts of an antioxidant; 1680.8 parts of antioxidant.
The preparation method of the flexible easy-bonding waterproof material comprises the following steps:
s1, mixing ethylene-acrylate rubber, an auxiliary crosslinking agent, sulfur and an accelerator according to selected mass parts, putting the mixture into a double-screw extruder, and performing melt extrusion and granulation, wherein the process conditions are as follows: the temperature of the first area is 175 ℃, the temperature of the second area to the eighth area is 180-;
s2, blending the product granulated in the step S1, linear low-density polyethylene, high-density polyethylene, vinyl-terminated methyl vinyl silicone rubber, ethylene-vinyl acetate copolymer, a cross-linking agent and an antioxidant, and putting the mixture into a single-screw extruder to melt and extrude a sheet with the thickness of 1.5mm, wherein the process conditions are as follows: the temperature of the first zone is 170 ℃, the temperature of the second zone to the eighth zone is 180-; the temperature of the cooling roller is upper roller: 43 ℃, middle roll: 58 ℃, lower roll: and (3) obtaining the flexible easily-bonded waterproof material at 53 ℃.
Example 5
The flexible easy-adhesion waterproof material comprises the following raw materials in parts by mass:
15 parts of linear low-density polyethylene and 15 parts of high-density polyethylene, wherein the melt flow rate is 5g/10 min; 15 parts of ethylene-acrylate rubber, wherein the content of methyl acrylate is 20 percent, and the melt flow rate is 3.5g/10 min; 40 parts of vinyl-terminated methyl vinyl silicone rubber, wherein the molecular weight of the vinyl-terminated methyl vinyl silicone rubber is 50 ten thousand, and the vinyl content is 0.4%; 8 parts of ethylene-vinyl acetate copolymer, wherein the content of vinyl acetate is 26 percent, and the melt flow rate is 20g/10 min; 0.05 part of cross-linking agent AIBN; 5 parts of assistant crosslinking agent TAIC; 0.005 part of sulfur(s); 0.005 part of accelerator DOTG; 10101 parts of an antioxidant; 1681 part of antioxidant.
The preparation method of the flexible easy-bonding waterproof material described in this example is the same as that of example 1.
Example 6
The flexible easy-adhesion waterproof material comprises the following raw materials in parts by mass:
50 parts of linear low-density polyethylene and 50 parts of high-density polyethylene, wherein the melt flow rate is 5g/10 min; 1 part of ethylene-acrylate rubber, wherein the content of methyl acrylate is 20 percent, and the melt flow rate is 3.5g/10 min; 2 parts of vinyl-terminated methyl vinyl silicone rubber, wherein the molecular weight of the vinyl-terminated methyl vinyl silicone rubber is 50 ten thousand, and the vinyl content of the vinyl-terminated methyl vinyl silicone rubber is 0.4%; 50 parts of ethylene-vinyl acetate copolymer, wherein the content of vinyl acetate is 26 percent, and the melt flow rate is 20g/10 min; 5 parts of cross-linking agent AIBN; 0.2 part of assistant crosslinking agent TAIC; 0.5 part of sulfur(s); 0.2 part of accelerator DOTG; 10101 parts of an antioxidant; 1681 part of antioxidant.
The preparation method of the flexible easy-bonding waterproof material described in this example is the same as that of example 1.
Example 7
The raw material composition of the flexible easy-adhesion waterproof material described in this example is the same as that of example 1, except that in this example, the ethylene-acrylate rubber contains 10% methyl acrylate, and the melt flow rate is 1g/10 min.
Example 8
The flexible easy-adhesion waterproof material described in this embodiment has the same composition as that of the preparation raw material described in embodiment 1, except that in this embodiment, the mass percentage content of vinyl in the vinyl terminated methyl vinyl silicone rubber is that the vinyl content range is 0.01%.
Example 9
The flexible and easily-adhered waterproof material described in this embodiment has the same composition as that of the raw material used in embodiment 1, except that in this embodiment, the vinyl-terminated methyl vinyl silicone rubber contains 1% by mass of vinyl.
Comparative example
The waterproof material of the comparative example comprises the following raw materials in parts by mass:
65 parts of linear low-density polyethylene; 35 parts of high-density polyethylene; 10100.1 parts of an antioxidant; 1680.1 parts of antioxidant.
The preparation method of the flexible easy-bonding waterproof material comprises the following steps:
s1, blending linear low-density polyethylene, high-density polyethylene and an antioxidant according to selected parts by mass, putting the mixture into a single-screw extruder to perform melt extrusion on a sheet with the thickness of 1.5mm, wherein the process conditions are as follows: the temperature of the first zone is 170 ℃, the temperature of the second zone to the eighth zone is 180-; the temperature of the cooling roller is upper roller: 40 ℃, middle roll: 45 ℃, lower roll: and (4) obtaining the flexible easily-bonded waterproof material at 45 ℃.
Mechanical property detection of flexible easy-bonding waterproof material
The mechanical properties of the flexible easy-adhesion waterproof materials of the examples and the comparative examples are detected, wherein the tensile property is detected according to GB/T528, the tearing property is detected according to GB/T529, the adhesion property is detected according to GB/T328.20, a sample is prepared by adopting a commercially available hot-melt pressure-sensitive adhesive, and the ball indentation hardness is detected according to GB/T3398.1. The results are shown in Table 1 below. As can be seen from the results in the table below, compared with the comparative examples, the flexible easy-to-bond waterproof material of the invention has significantly higher tensile strength and tear strength, good flexibility, low ball indentation hardness and high bonding strength with various hot melt adhesives. In contrast, the formulations of examples 1-4 are the preferred formulation range, with superior performance compared to examples 5-9. The flexible, easily bondable, waterproof material of example 7 had poor compatibility with the base material during the extrusion production process due to the low methyl acrylate content, low melt flow rate, and poor easy bondability of the base material in the ethylene-acrylate rubber of the formulation. The flexible and easily-bonded waterproof material of example 8 cannot provide effective mechanical support because the mass percentage of vinyl in the vinyl-terminated methyl vinyl silicone rubber in the formula is too small, and the crosslinked network is incomplete; the flexible, easily bondable, waterproof material of example 9 has a strong colloidal brittleness due to the fact that the mass percentage of vinyl in the vinyl-terminated methyl vinyl silicone rubber in the formulation is too much, and the crosslinking points are too dense.
TABLE 1
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (6)
1. The flexible easy-bonding waterproof material is characterized by comprising the following raw materials in parts by mass:
65-85 parts of polyolefin, 3-8 parts of ethylene-acrylate rubber, 6-20 parts of vinyl-terminated methyl vinyl silicone rubber, 15-25 parts of ethylene-vinyl acetate copolymer, 0.1-2 parts of cross-linking agent, 0.5-2 parts of auxiliary cross-linking agent, 0.01-0.2 part of sulfur and 0.01-0.1 part of accelerator;
the polyolefin is one or a mixture of two of linear low density polyethylene and high density polyethylene; the melt flow rate of the polyolefin is 1-10g/10 min;
the ethylene-acrylic ester rubber is ethylene-methyl acrylate rubber, and the content of methyl acrylate in the ethylene-methyl acrylate rubber is 15% -30%; the melt flow rate of the ethylene-methyl acrylate rubber is 2-5g/10 min;
the molecular weight of the vinyl-terminated methyl vinyl silicone rubber is 45-60 ten thousand; the vinyl content in the vinyl-terminated methyl vinyl silicone rubber is 0.03 to 0.8 percent;
the cross-linking agent is one or the mixture of two of dicumyl peroxide and azodiisobutyronitrile;
the auxiliary crosslinking agent is triallyl isocyanurate.
2. The flexible, easily bondable, waterproof material according to claim 1, characterized in that:
the preparation raw materials also comprise 0.2-4 parts of antioxidant according to the mass parts.
3. The flexible, easily bondable, waterproof material according to claim 1, characterized in that:
in the ethylene-vinyl acetate copolymer, the content of vinyl acetate is 15-45%; the melt flow rate of the ethylene-vinyl acetate copolymer is 5-30g/10 min.
4. A method for preparing the flexible easy-to-bond waterproof material as claimed in any one of claims 1 to 3, characterized by comprising the steps of:
s1, mixing the ethylene-acrylate rubber, the auxiliary crosslinking agent, the sulfur and the accelerator, and performing melt extrusion granulation;
and S2, blending the product granulated in the step S1, polyolefin, vinyl-terminated methyl vinyl silicone rubber, ethylene-vinyl acetate copolymer and a cross-linking agent, and melting and extruding a sheet to obtain the flexible easily-bonded waterproof material.
5. The method for preparing a flexible easy-to-bond waterproof material according to claim 4, characterized in that:
in step S1, a twin-screw extruder is used for melt extrusion granulation, wherein the temperature of the first zone of the twin-screw extruder is 175-.
6. The method for preparing a flexible easy-to-bond waterproof material according to claim 5, characterized in that:
in step S2, a single-screw extruder is adopted for melt extrusion of sheets, the temperature of the first zone of the single-screw extruder is 160-170 ℃, the temperature of the second zone to the eighth zone is 180-225 ℃, the temperature of the machine head is 220-230 ℃, the rotating speed of a host is 10-50r/min, the traction speed is 1-5m/min, and the pressure before the pump of the host is 1.0-5 MPa; the temperature of the cooling roller is upper roller: 40-45 ℃, middle roller: 55-60 ℃, lower roll: 50-55 ℃.
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| JP2017523295A (en) * | 2014-06-27 | 2017-08-17 | ダウ グローバル テクノロジーズ エルエルシー | Cold shrinkage articles for electrical equipment |
| CN109553846A (en) * | 2018-12-05 | 2019-04-02 | 上海卒业新材料科技有限公司 | Long-life irradiated crosslinking low-smoke and halogen-free High-flame retardance polyolefin cable material and preparation method |
| CN110922669A (en) * | 2019-11-14 | 2020-03-27 | 苏州铂玛新材料有限公司 | Fireproof and fireproof ceramic polyolefin wire and cable material and preparation method thereof |
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2020
- 2020-12-21 CN CN202011521990.5A patent/CN112662044B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017523295A (en) * | 2014-06-27 | 2017-08-17 | ダウ グローバル テクノロジーズ エルエルシー | Cold shrinkage articles for electrical equipment |
| CN106366425A (en) * | 2016-08-29 | 2017-02-01 | 上海至正道化高分子材料股份有限公司 | Weatherproof low-smoke zero-halogen polyolefin sheath material for extra-high-tension cable and preparation method of weatherproof low-smoke zero-halogen polyolefin sheath material |
| CN106280475A (en) * | 2016-08-30 | 2017-01-04 | 安徽蓝德集团股份有限公司 | A kind of Graphene modified silicon rubber cable sheath material |
| CN109553846A (en) * | 2018-12-05 | 2019-04-02 | 上海卒业新材料科技有限公司 | Long-life irradiated crosslinking low-smoke and halogen-free High-flame retardance polyolefin cable material and preparation method |
| CN110922669A (en) * | 2019-11-14 | 2020-03-27 | 苏州铂玛新材料有限公司 | Fireproof and fireproof ceramic polyolefin wire and cable material and preparation method thereof |
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