A mortise and tenon structure waterproof roll material and a preparation method thereof

Abstract

The present application relates to waterproofing membrane technical field, propose a mortise and tenon structure waterproofing membrane and its preparation method, the mortise and tenon structure waterproofing membrane is composed of two identical composite waterproofing membrane prefabricated body, the composite waterproofing membrane prefabricated body includes the isolation film layer I, first modified bitumen self-adhesive layer, polymer type matrix layer, second modified bitumen self-adhesive layer from bottom to top are sequentially arranged, the composite is the second modified bitumen self-adhesive layer of two identical composite waterproofing membrane prefabricated body, in the process of composite, the two identical composite waterproofing membrane prefabricated body interface is staggered, the staggered place forms the lap joint structure, the isolation film layer II is arranged at the staggered place, obtains the mortise and tenon structure waterproofing membrane.Through the above technical scheme, the problem of low peeling strength of the waterproofing membrane in the prior art and significant decrease in peeling strength after immersion is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of waterproofing membrane, in particular to a mortise and tenon structure waterproofing membrane and a preparation method thereof. BACKGROUND

[0002] With the continuous improvement of building waterproofing technology, waterproofing membrane as an important waterproofing material is widely used in the waterproofing and moisture-proof fields of building engineering such as roof, basement, bridge, tunnel, etc.

[0003] The main categories of waterproofing membrane include SBS waterproofing membrane, polypropylene waterproofing membrane, EPDM waterproofing membrane, PVC waterproofing membrane, TPO waterproofing membrane, etc. Among them, SBS modified asphalt waterproofing membrane is widely used in the field of building waterproofing as a waterproofing material, which has the advantages of compact structure, corrosion resistance, good waterproofing performance, convenient and fast construction, low repair cost, etc. However, the peeling strength of SBS modified asphalt waterproofing membrane will decrease significantly during long-term use in underground engineering with water, resulting in peeling and skinning problems and reducing the service life of the waterproofing membrane. SUMMARY

[0004] The present application provides a mortise and tenon structure waterproofing membrane and a preparation method thereof, which solves the problem of low peeling strength of waterproofing membrane and significant decrease in peeling strength after immersion in water in the related art.

[0005] The technical solution of the present application is as follows:

[0006] The present application provides a mortise and tenon structure waterproofing membrane, which is composed of two identical composite waterproofing membrane preforms. The composite waterproofing membrane preform includes, from bottom to top, an isolation film layer I, a first modified asphalt self-adhesive layer, a high molecular matrix layer, and a second modified asphalt self-adhesive layer. The two identical composite waterproofing membrane preforms are compounded at the second modified asphalt self-adhesive layers. During the compounding process, the two identical composite waterproofing membrane preforms are staggered at the interface, forming a lap joint structure at the staggered part. An isolation film layer II is arranged at the staggered part to obtain a mortise and tenon structure waterproofing membrane.

[0007] The material of the modified asphalt self-adhesive layer includes the following components by weight: 60-70 parts of petroleum asphalt, 25-30 parts of softening agent, 20-25 parts of tackifier, 30-40 parts of filler, 8-10 parts of SBS modifier, 2-4 parts of 3,4,5-tricarboxylic acid aniline, 1-3 parts of 2-aminocarboxymethylbenzoic acid, and 1-1.5 parts of lubricant. The high molecular matrix layer includes one of polyester matrix layer, PET matrix layer, and PE matrix layer.

[0008] As a further technical solution, the mass ratio of 3,4,5-tricarboxylic acid aniline and 2-aminocarboxymethylbenzoic acid is 2:1.

[0009] As a further technical solution, the SBS modifier is composed of SBS 4303 and SBS1901.

[0010] In the present application, it is found that when the SBS modifier is composed of SBS 4303 and SBS1901, the peeling strength of the lap edge of the dovetail structure waterproof roll material and the roll material can be further improved, and the change rate of the peeling strength after immersion can be reduced.

[0011] As a further technical solution, the mass ratio of the SBS 4303 and SBS1901 is 5:3.

[0012] As a further technical solution, the petroleum asphalt is 90# petroleum asphalt.

[0013] As a further technical solution, the tackifier includes one or more of C9 petroleum resin, C5 petroleum resin, and rosin.

[0014] As a further technical solution, the lubricant includes one or both of wax powder, calcium stearate, and stearic acid.

[0015] As a further technical solution, the softening agent is one or more of polyethylene wax, glycerol, and polyethylene glycol.

[0016] As a further technical solution, the filler is composed of talc powder and kaolin.

[0017] The present application also includes a preparation method of a dovetail structure waterproof roll material, including the following steps:

[0018] S1, stirring the petroleum asphalt and the softening agent to obtain a mixture I;

[0019] S2, adding the SBS modifier and the lubricant to the mixture I and stirring uniformly to obtain a mixture II;

[0020] S3, adding the filler, 3,4,5-tricarboxylic acid aniline, and 2-aminocarboxymethylbenzoic acid to the mixture II and stirring uniformly to obtain a modified asphalt self-adhesive layer material;

[0021] S4, coating the upper and lower surfaces of the high-molecular matrix layer with the modified asphalt self-adhesive layer material to form a first modified asphalt self-adhesive layer and a second modified asphalt self-adhesive layer, thereby obtaining a dovetail structure waterproof roll material semi-finished product;

[0022] S5, covering the first modified asphalt self-adhesive layer of the dovetail structure waterproof roll material semi-finished product with a release film I to form a release film layer, thereby obtaining a dovetail structure waterproof roll material preform;

[0023] S6, the second modified asphalt self-adhesive layer of the mortise and tenon structure waterproof roll material prefabricated body is compounded with the second modified asphalt self-adhesive layer of another mortise and tenon structure waterproof roll material prefabricated body, in the process of compounding, the two same composite waterproof roll material prefabricated bodies are staggered at the joint surface, the staggered part forms a lap joint structure, the isolation film II is arranged at the staggered part, and the mortise and tenon structure waterproof roll material is obtained

[0024] As a further technical solution, the width of the lap joint structure is 8-10 cm.

[0025] As a further technical solution, the temperature of the coating in S4 is 180-200 DEG C.

[0026] As a further technical solution, the thickness of the first modified asphalt self-adhesive layer and the second modified asphalt self-adhesive layer is the same.

[0027] As a further technical solution, the thickness of the mortise and tenon structure waterproof roll material is 4 mm.

[0028] As a further technical solution, the thickness of the high molecular matrix layer is 0.5 mm.

[0029] As a further technical solution, the thickness of the isolation layer is 0.04 mm.

[0030] The working principle and beneficial effects of the present application are as follows:

[0031] In the present application, the waterproof roll material is a mortise and tenon structure waterproof roll material which is prefabricated, staggered and lap jointed, and is composed of double high molecular film bases, and moreover, the modified asphalt self-adhesive layer in the present application adopts a unique formula, 3,4,5-tricarboxylic acid aniline and 2-amino carboxymethyl benzoic acid are added, the prepared mortise and tenon structure waterproof roll material has high peel strength between the lap joint roll material and the roll material, and can still maintain high peel strength after immersion. BRIEF DESCRIPTION OF DRAWINGS

[0032] The present application will be further described in detail below in combination with the drawings and specific embodiments.

[0033] Figure 1 The structure of the mortise and tenon structure waterproof roll material in Example 1 of the present application is shown in the figure. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are involved in the scope of protection of the present application.

[0035] The following examples and comparative examples

[0036] The isolation film I and the isolation film II are both the same polyethylene film;

[0037] SBS 4303, Yanshan Petrochemical;

[0038] SBS 1901, Hunan Yueyang Petrochemical General Factory;

[0039] Wax powder, model: TITAN 7686, Honeywell International Corporation;

[0040] Kaolin, mass content of silicon dioxide 89%;

[0041] Talc, mass content of silicon dioxide 60%.

[0042] Example 1

[0043] A preparation method of a mortise and tenon structure waterproof roll material, comprising the following steps:

[0044] S1, after stirring 60 parts of 90# petroleum asphalt and 25 parts of polyethylene wax, a mixture I is obtained;

[0045] S2, after uniformly stirring 4 parts of SBS 4303, 4 parts of SBS 1901, 1 part of wax powder in the mixture I, a mixture II is obtained;

[0046] S3, after uniformly stirring 30 parts of fillers (composed of 600 mesh talc and 600 mesh kaolin with a mass ratio of 1:3), 4 parts of 3,4,5-tricarboxylic acid aniline and 1 part of 2-aminocarboxymethylbenzoic acid in the mixture II, a modified asphalt self-adhesive layer material is obtained;

[0047] S4, the upper and lower surfaces of the polyester matrix layer are coated with the modified asphalt self-adhesive layer material at 180℃, and the thickness is determined by the thickness device to form the first modified asphalt self-adhesive layer and the second modified asphalt self-adhesive layer, and a mortise and tenon structure waterproof roll material semi-finished product is obtained;

[0048] S5, a polyethylene film is covered on the first modified asphalt self-adhesive layer of the mortise and tenon structure waterproof roll material semi-finished product to form an isolation film layer, and a mortise and tenon structure waterproof roll material preform is obtained;

[0049] S6, the second modified asphalt self-adhesive layer of the mortise and tenon structure waterproof roll material preform is compounded with the second modified asphalt self-adhesive layer of another mortise and tenon structure waterproof roll material preform, in the process of compounding, the two same composite waterproof roll material preforms are staggered at the joint surface, a lap joint structure (the lap joint structure width is 10 cm) is formed at the staggered position, the isolation film layer II is arranged at the staggered position, and a mortise and tenon structure waterproof roll material with a thickness of 4 mm is obtained; wherein the thickness of the polyester base layer is 0.5 mm, the thickness of the polyethylene film is 0.04 mm, and the thicknesses of the first modified asphalt self-adhesive layer and the second modified asphalt self-adhesive layer are the same. Figure 1

[0050] Embodiment 2

[0051] A preparation method of a mortise and tenon structure waterproof roll material, comprising the following steps:

[0052] S1, 65 parts of 90# petroleum asphalt and 28 parts of glycerol are stirred to obtain a mixture I;

[0053] S2, 4.5 parts of SBS 4303, 4.5 parts of SBS 1901 and 1.2 parts of stearic acid are uniformly stirred into the mixture I to obtain a mixture II;

[0054] S3, 35 parts of fillers (composed of 600 mesh talc and 600 mesh kaolin with a mass ratio of 1:3), 2 parts of 3,4,5-tricarboxylic acid aniline and 1.5 parts of 2-aminocarboxymethylbenzoic acid are uniformly stirred into the mixture II to obtain a modified asphalt self-adhesive layer material;

[0055] S4, the upper and lower surfaces of the polyester base layer are coated with the modified asphalt self-adhesive layer material at 190 DEG C, and the thickness is determined by a thickness determining device to form a first modified asphalt self-adhesive layer and a second modified asphalt self-adhesive layer, and a mortise and tenon structure waterproof roll material semi-finished product is obtained;

[0056] S5, the isolation film I is overlaid on the first modified asphalt self-adhesive layer of the mortise and tenon structure waterproof roll material semi-finished product to form an isolation film layer, and a mortise and tenon structure waterproof roll material preform is obtained;

[0057] S6, the second modified asphalt self-adhesive layer of the mortise and tenon structure waterproof roll material preform is compounded with the second modified asphalt self-adhesive layer of another mortise and tenon structure waterproof roll material preform, in the process of compounding, the two same composite waterproof roll material preforms are staggered at the joint surface, a lap joint structure (the lap joint structure width is 10 cm) is formed at the staggered position, the isolation film layer II is arranged at the staggered position, and a mortise and tenon structure waterproof roll material with a thickness of 4 mm is obtained; wherein the thickness of the polyester base layer is 0.5 mm, the thickness of the polyethylene film is 0.04 mm, and the thicknesses of the first modified asphalt self-adhesive layer and the second modified asphalt self-adhesive layer are the same.

[0058] Embodiment 3​

[0059] A preparation method of a mortise and tenon structure waterproof roll material, comprising the following steps:

[0060] S1, 70 parts of 90# petroleum asphalt and 30 parts of polyethylene glycol are stirred to obtain a mixture I;

[0061] S2, 5 parts of SBS 4303, 5 parts of SBS 1901 and 1.5 parts of calcium stearate are added to the mixture I and stirred uniformly to obtain a mixture II;

[0062] S3, 40 parts of fillers (composed of 600 mesh talc and 600 mesh kaolin with a mass ratio of 1:3), 3 parts of 3,4,5-tricarboxylic acid aniline and 2 parts of 2-aminocarboxymethylbenzoic acid are added to the mixture II and stirred uniformly to obtain a modified asphalt self-adhesive layer material;

[0063] S4, the upper and lower surfaces of the polyester matrix layer are coated with the modified asphalt self-adhesive layer material at 200 DEG C, and the thickness is determined by a thickness determining device to form a first modified asphalt self-adhesive layer and a second modified asphalt self-adhesive layer, thereby obtaining a mortise and tenon structure waterproof roll material semi-finished product;

[0064] S5, the first modified asphalt self-adhesive layer of the mortise and tenon structure waterproof roll material semi-finished product is covered with a release film I to form a release film layer, thereby obtaining a mortise and tenon structure waterproof roll material preform;

[0065] S6, the second modified asphalt self-adhesive layer of the mortise and tenon structure waterproof roll material preform is combined with the second modified asphalt self-adhesive layer of another mortise and tenon structure waterproof roll material preform, and in the process of combination, the two identical composite waterproof roll material preforms are staggered at the joint surface, the staggered part forms a lap joint structure (the width of the lap joint structure is 10 cm), and the release film layer II is arranged at the staggered part, thereby obtaining a mortise and tenon structure waterproof roll material with a thickness of 4 mm; wherein the thickness of the polyester matrix layer is 0.5 mm, the thickness of the polyethylene film is 0.04 mm, and the thicknesses of the first modified asphalt self-adhesive layer and the second modified asphalt self-adhesive layer are the same.

[0066] Example 4

[0067] The difference between this example and example 1 is that the 3,4,5-tricarboxylic acid aniline is 2.5 parts and the 2-aminocarboxymethylbenzoic acid is 2.5 parts.

[0068] Example 5

[0069] The difference between this example and example 1 is that the 3,4,5-tricarboxylic acid aniline is 2 parts and the 2-aminocarboxymethylbenzoic acid is 3 parts.

[0070] Example 6

[0071] This example differs from Example 1 only in that 5 parts of SBS 4303, 3 parts of SBS 1901 are used.

[0072] Example 7

[0073] This example differs from Example 1 only in that 6 parts of SBS 4303, 2 parts of SBS 1901 are used.

[0074] Example 8

[0075] This example differs from Example 1 only in that SBS 1901 is replaced by an equal amount of SBS 4303.

[0076] Example 9

[0077] This example differs from Example 1 only in that SBS 4303 is replaced by an equal amount of SBS 1901.

[0078] Example 10

[0079] This example differs from Example 1 only in that SBS 4303 is replaced by an equal amount of SBS 4402.

[0080] Comparative Example 1

[0081] This comparative example differs from Example 1 only in that 3,4,5-tricarboxyaniline is replaced by an equal amount of 2-aminocarboxymethylbenzoic acid.

[0082] Comparative Example 2

[0083] This comparative example differs from Example 1 only in that 2-aminocarboxymethylbenzoic acid is replaced by an equal amount of 3,4,5-tricarboxyaniline.

[0084] Comparative Example 3

[0085] This comparative example differs from Example 1 only in that 3,4,5-tricarboxyaniline and 2-aminocarboxymethylbenzoic acid are not added.

[0086] Test Example

[0087] The waterproofing membranes prepared in Examples 1-10 and Comparative Examples 1-3 were tested for peel strength of the lap edge to the membrane and the peel strength after being immersed in 23±2℃ water for 168h and then being dried, according to the test method in GB 23441-2009 "Self-adhesive polymer modified bitumen waterproofing membrane", and the peel strength change rate was calculated according to the following formula: peel strength change rate = (peel strength after immersion / peel strength before immersion-1) x 100%, and the test results are shown in Table 1.

[0088] Table 1 Performance measurement results of the dovetail structure waterproofing membrane prepared in Examples 1-10 and Comparative Examples 1-3

[0089]

[0090] The waterproofing membrane in Examples 1-10 is not permeable to water at 0.3 MPa for 120 min.

[0091] Compared with Example 1, Comparative Example 1 does not add 3,4,5-tricarboxylic aniline, Comparative Example 2 does not add 2-amino carboxymethyl benzoic acid, and Comparative Example 3 does not add 3,4,5-tricarboxylic aniline and 2-amino carboxymethyl benzoic acid. The results show that the unsoaked peel strength of the dovetail structure waterproofing membrane in Comparative Examples 1-3 is lower than that of Example 1, and the peel strength change rate is greater than that of Example 1, indicating that 3,4,5-tricarboxylic aniline and 2-amino carboxymethyl benzoic acid can improve the peel strength of the dovetail structure waterproofing membrane and reduce the peel strength change rate after soaking.

[0092] Compared with Example 1, Examples 4-5 change the mass ratio of 3,4,5-tricarboxylic aniline and 2-amino carboxymethyl benzoic acid. The results show that the unsoaked peel strength of the dovetail structure waterproofing membrane in Example 4 is lower than that of Example 1, and the peel strength change rate is greater than that of Example 1, indicating that when the mass ratio of 3,4,5-tricarboxylic aniline and 2-amino carboxymethyl benzoic acid is 1:1, the peel strength of the dovetail structure waterproofing membrane can be further improved and the peel strength change rate after soaking can be further reduced.

[0093] Compared with Example 1, Example 8 only adds SBS 4303, Example 9 only adds SBS 1901, Example 10 replaces SBS 4303 with an equal amount of SBS 4402, and Examples 6-7 change the mass ratio of SBS 4303 and SBS 1901. The results show that the unsoaked peel strength of the dovetail structure waterproofing membrane in Examples 8-10 is lower than that of Example 1, Example 6, and Example 7, and the peel strength change rate is greater than that of Example 1, Example 6, Example 7, and Example 10, indicating that the SBS modifier composed of SBS 4303 and SBS 1901 can improve the peel strength of the dovetail structure waterproofing membrane and reduce the peel strength change rate after soaking.

[0094] Comparing Comparative Example 1 with Examples 6-7, it is found that the unsoaked peel strength of the dovetail structure waterproofing membrane in Example 6 is higher than that of Example 1 and Example 7, and the peel strength change rate is less than that of Example 1 and Example 7, indicating that when the mass ratio of SBS 4303 to SBS 1901 is 5:3, the peel strength of the dovetail structure waterproofing membrane can be further improved and the absolute value of the peel strength change rate after soaking can be further reduced.

[0095] The above merely preferred embodiments of the present application are not used to limit the present application, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A method for preparing a mortise and tenon structure waterproof membrane, characterized in that: The following steps are involved: S1. Stirring 60-70 parts of petroleum asphalt and 25-30 parts of a softener to obtain a mixture I; S2. Add 8 to 10 parts of SBS modifier and 1 to 1.5 parts of lubricant to the mixture I and stir evenly to obtain a mixture II; S3. Add 30-40 parts of filler, 2-4 parts of 3,4,5-tricarboxylic acid aniline, and 1-3 parts of 2-aminocarboxylmethyl benzoic acid to the mixture II and stir evenly to obtain a modified asphalt self-adhesive layer material; S4, coating the upper and lower surfaces of the polymer carcass layer with a modified asphalt self-adhesive layer material to form a first modified asphalt self-adhesive layer and a second modified asphalt self-adhesive layer, thereby obtaining a semi-finished mortise and tenon structure waterproof membrane; S5, covering the first modified asphalt self-adhesive layer of the semi-finished mortise and tenon structure waterproof membrane with an isolation film I to form an isolation film layer, thereby obtaining a prefabricated mortise and tenon structure waterproof membrane; S6. Compounding the second modified asphalt self-adhesive layer of the mortise and tenon structure waterproof membrane preform with the second modified asphalt self-adhesive layer of another identical mortise and tenon structure waterproof membrane preform, during the compounding process, staggering the contact surfaces of the two identical composite waterproof membrane preforms to form an overlap structure at the staggered location, and providing an isolation membrane layer II at the staggered location to obtain a mortise and tenon structure waterproof membrane; The polymer carcass layer includes one of a polyester carcass layer and a PE carcass layer; The above parts are all parts by weight.

2. The method for preparing a mortise and tenon structure waterproof membrane according to claim 1, wherein: The SBS modifier consists of SBS 4303 and SBS1901.

3. The method for preparing a mortise and tenon structure waterproof membrane according to claim 1, characterized in that: The petroleum asphalt is 90# petroleum asphalt.

4. The method for preparing a mortise and tenon structure waterproof membrane according to claim 1, characterized in that: The lubricant comprises one or two of wax powder, calcium stearate and stearic acid.

5. The method for preparing a mortise and tenon structure waterproof membrane according to claim 1, characterized in that: The softener is one or more of polyethylene wax, glycerol, and polyethylene glycol.

6. The method for preparing a mortise and tenon structure waterproof membrane according to claim 1, characterized in that: The filler consists of talc powder and kaolin.

7. The method for preparing a mortise and tenon structure waterproof membrane according to claim 1, characterized in that: The coating temperature in S4 is 180-200°C.

8. A mortise and tenon structure waterproof membrane, characterized in that: The waterproof membrane for mortise and tenon structures is prepared by the preparation method of the waterproof membrane for mortise and tenon structures according to any one of claims 1 to 7.

9. The mortise and tenon structure waterproof membrane according to claim 8, characterized in that: The thickness of the polymer carcass layer is 0.5 mm.

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