Exposed modified asphalt waterproof coiled material and preparation method thereof

Abstract

The invention provides an exposed modified asphalt waterproof coiled material. The exposed modified asphalt waterproof coiled material comprises an asphalt waterproof coiled material, the modified asphalt layer is compounded on the asphalt waterproof coiled material surface layer; the modified asphalt layer is prepared from modified asphalt comprising thermoplastic vulcanized rubber and atactic polypropylene. The waterproof asphalt is modified by the thermoplastic vulcanized rubber which is resistant to thermo-oxidative aging, ultraviolet aging and high temperature and the atactic polypropylene, and the modified asphalt is coated on the surface layer of the asphalt waterproof coiled material in the processing process, so that better integral interaction is realized, and finally, the asphalt waterproof coiled material which can be exposed for use is formed; the asphalt coiled material can be exposed for use, a protective layer is not needed, and the engineering efficiency and cost are improved; meanwhile, compared with other exposed waterproof coiled materials, the coiled material disclosed by the invention is formed by coating a conventional asphalt coiled material surface layer after asphalt is modified by using an anti-aging modifier, is low in self weight, is not debonded with the conventional asphalt coiled material, is low in material cost and can be used as a waterproof layer of the waterproof coiled material, and the application cost is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of building waterproof materials, and more specifically to an exposed modified asphalt waterproof coiled material and a preparation method thereof. Background Art

[0002] Conventional asphalt waterproofing membranes cannot be used exposed due to reasons such as aging and chain breakage of the modifier polymer chain, and need to be covered with a protective layer. As a result, there are technical problems such as slow construction efficiency, complicated construction procedures, and high costs. At the same time, common shale waterproofing membranes and waterproofing membranes coated with fluorocarbon films have problems such as heavy weight, easy shale shedding, and high cost. Summary of the invention

[0003] In view of this, the object of the present invention is to provide an exposed modified asphalt waterproofing membrane and a preparation method thereof. The exposed modified asphalt waterproofing membrane provided by the present invention enables the asphalt membrane to be exposed for use without applying a protective layer, thereby improving engineering efficiency and cost. At the same time, compared with other exposed waterproofing membranes, the membrane of the present invention is a conventional asphalt membrane surface layer coated with asphalt modified by an aging-resistant modifier, has a small dead weight, does not debond with conventional asphalt membranes, has a low material cost, can be used as a waterproof layer of a waterproof membrane, and reduces application costs.

[0004] The present invention provides an exposed modified asphalt waterproofing membrane, comprising:

[0005] Asphalt waterproofing membrane;

[0006] A modified asphalt layer compounded on the surface layer of the asphalt waterproofing membrane;

[0007] The modified asphalt layer is prepared from modified asphalt including thermoplastic vulcanized rubber and random polypropylene.

[0008] Preferably, the asphalt waterproofing membrane is an SBS modified asphalt waterproofing membrane.

[0009] Preferably, in the modified asphalt, the mass fraction of thermoplastic vulcanized rubber is 8% to 20%, and the mass fraction of random polypropylene is 6% to 12%.

[0010] Preferably, the thickness of the exposed modified asphalt waterproof membrane is 3 mm to 5 mm.

[0011] The present invention also provides a method for preparing the exposed modified asphalt waterproofing membrane described in the above technical solution, comprising the following steps:

[0012] a) After heating the base asphalt, adding thermoplastic vulcanized rubber and random polypropylene, and shearing, to obtain modified asphalt;

[0013] b) coating the modified asphalt obtained in step a) on the surface layer of the asphalt waterproofing membrane at 180° C. to 220° C., compounding, and cooling to obtain an exposed modified asphalt waterproofing membrane.

[0014] Preferably, the base asphalt in step a) is selected from one or more of 70# asphalt, 200# asphalt and blended asphalts thereof.

[0015] Preferably, the process of heating the base asphalt in step a) is specifically as follows:

[0016] Heat the base asphalt to 170℃~190℃, and stir at a speed of 150r / min~250r / min for 10min~20min until it is uniform.

[0017] Preferably, the shearing temperature in step a) is 200° C. to 220° C., the rotation speed is 2500 r / min to 3500 r / min, and the time is 50 min to 70 min.

[0018] Preferably, the coating thickness in step b) is ≥ 0.5 mm.

[0019] Preferably, the compounding process in step b) is specifically as follows:

[0020] After applying the modified asphalt to the surface layer of the asphalt waterproofing membrane, the composite process is completed by secondary coating of the modified asphalt and rolling to determine the thickness at 180℃~210℃.

[0021] The present invention provides an exposed modified asphalt waterproofing roll material, comprising: an asphalt waterproofing roll material; a modified asphalt layer compounded on the surface layer of the asphalt waterproofing roll material; the modified asphalt layer is prepared from modified asphalt including thermoplastic vulcanized rubber and random polypropylene. Compared with the prior art, the present invention uses thermoplastic vulcanized rubber (TPV) and random polypropylene (APP) that are resistant to heat oxygen aging, ultraviolet aging and high temperature to modify waterproof asphalt, and the modified asphalt is coated on the surface layer of the asphalt waterproofing roll material during the processing process to achieve overall good interaction, and finally form an asphalt waterproofing roll material that can be exposed for use; the product can make the asphalt roll material exposed for use without a protective layer, thereby improving engineering efficiency and cost; at the same time, compared with other exposed waterproofing roll materials, the roll material of the present invention is a conventional asphalt roll material surface layer coated with asphalt modified by an aging-resistant modifier, has a small self-weight, does not debond with conventional asphalt roll materials, has a low material cost, can be used as a waterproof layer of waterproofing roll materials, and has a reduced application cost.

[0022] In addition, the preparation method provided by the present invention can ensure that each layer has a high bonding force, so that interlayer separation does not occur, and the process is simple, easy to operate, and suitable for large-scale industrial production. DETAILED DESCRIPTION

[0023] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] The present invention provides an exposed modified asphalt waterproofing membrane, comprising:

[0025] Asphalt waterproofing membrane;

[0026] A modified asphalt layer compounded on the surface layer of the asphalt waterproofing membrane;

[0027] The modified asphalt layer is prepared from modified asphalt including thermoplastic vulcanized rubber and random polypropylene.

[0028] In the present invention, the exposed modified asphalt waterproofing membrane comprises an asphalt waterproofing membrane and a modified asphalt layer composited on the surface layer of the asphalt waterproofing membrane, preferably consisting of an asphalt waterproofing membrane and a modified asphalt layer.

[0029] The present invention has no special restrictions on the source of the asphalt waterproofing membrane, and a commercially available conventional asphalt waterproofing membrane known to those skilled in the art can be used. In a preferred embodiment of the present invention, the asphalt waterproofing membrane is a common SBS modified asphalt waterproofing membrane.

[0030] In the present invention, the modified asphalt layer is compounded on the surface layer of the asphalt waterproofing membrane; the modified asphalt layer is prepared from modified asphalt including thermoplastic vulcanizate (TPV) and atactic polypropylene (APP).

[0031] In the present invention, the thermoplastic vulcanized rubber (TPV) and random polypropylene (APP) are asphalt modified materials, wherein TPV is an elastomer formed by a dynamic hot vulcanization process with EPDM as the main material, and its aging resistance performance is obviously superior; APP is random polypropylene, which is often used as an asphalt modifier and has high heat resistance and UV resistance. The present invention has no special restrictions on the sources of the thermoplastic vulcanized rubber (TPV) and random polypropylene (APP), and commercially available products known to those skilled in the art can be used.

[0032] In the present invention, in the modified asphalt, the mass fraction of the thermoplastic vulcanized rubber is preferably 8% to 20%, more preferably 14% to 16%, and the mass fraction of the random polypropylene is preferably 6% to 12%, more preferably 7% to 9%.

[0033] The present invention has no special limitation on the base asphalt of the modified asphalt, and commercially available base asphalt well known to those skilled in the art can be used.

[0034] In the present invention, the thickness of the exposed modified asphalt waterproofing membrane is preferably 3 mm to 5 mm, more preferably 4 mm.

[0035] The present invention uses TPV and APP which are resistant to heat oxygen aging, ultraviolet aging and high temperature, and modifies waterproof asphalt according to a certain addition ratio, and applies the modified asphalt to the surface layer of conventional asphalt waterproofing coiled material according to a certain thickness during the processing process, so as to form an asphalt waterproofing coiled material which can be exposed for use; this product can optimize the existing asphalt waterproofing coiled material structure and can be directly exposed for use, thereby increasing the service life of the exposed asphalt coiled material; no protective layer is required, thus reducing the building load, reducing the construction period, increasing the efficiency and saving the cost; the coiled material can be directly used, and is convenient to operate, and is suitable for waterproofing of new construction and repair of exposed projects such as roofs and waterproofing of self-built houses in rural areas; compared with shale-type exposed waterproofing coiled materials, the self-weight is small, the construction is convenient, and the adhesion with the asphalt coiled material is good, and no debonding occurs; compared with externally applied fluorocarbon anti-aging plastic film-type exposed waterproofing coiled materials and polymer-type waterproofing coiled materials, the raw material cost is low, and the thickness of the waterproofing functional layer of the asphalt waterproofing coiled material is increased.

[0036] The present invention also provides a method for preparing the exposed modified asphalt waterproofing membrane described in the above technical solution, comprising the following steps:

[0037] a) After heating the base asphalt, adding thermoplastic vulcanized rubber and random polypropylene, and shearing, to obtain modified asphalt;

[0038] b) coating the modified asphalt obtained in step a) on the surface layer of the asphalt waterproofing membrane at 180° C. to 220° C., compounding, and cooling to obtain an exposed modified asphalt waterproofing membrane.

[0039] The invention first heats the base asphalt, then adds thermoplastic vulcanized rubber and random polypropylene, and performs shearing to obtain modified asphalt.

[0040] In the present invention, the matrix asphalt is preferably selected from one or more of 70# asphalt, 200# asphalt and blended asphalt thereof, more preferably 70# asphalt and 200# asphalt. In a preferred embodiment of the present invention, the matrix asphalt is 70# asphalt and 200# asphalt in a mass ratio of 2:3. The present invention has no particular restrictions on the source of the matrix asphalt, and commercially available products known to those skilled in the art can be used.

[0041] In the present invention, the process of heating the base asphalt is preferably as follows:

[0042] Heat the base asphalt to 170℃~190℃, stir at 150r / min~250r / min for 10min~20min until it is uniform;

[0043] More preferably:

[0044] Heat the base asphalt to 180°C and stir at 200 r / min for 15 minutes until it is uniform.

[0045] In the present invention, the shearing process (i.e., the modification process) preferably uses a shearing machine well known to those skilled in the art to add TPV and APP to the matrix asphalt for modification; the shearing temperature is preferably 200°C~220°C, more preferably 210°C, the rotation speed is preferably 2500r / min~3500r / min, more preferably 3000r / min, and the time is preferably 50min~70min, more preferably 60min; after shearing, the thermoplastic vulcanized rubber and random polypropylene are evenly dispersed.

[0046] After obtaining the modified asphalt, the present invention applies the obtained modified asphalt to the surface layer of the asphalt waterproofing coiled material at 180° C. to 220° C., performs compounding, and obtains the exposed modified asphalt waterproofing coiled material after cooling.

[0047] In the present invention, the coating thickness is preferably ≥ 0.5 mm, more preferably 1 mm.

[0048] In the present invention, the compounding process is preferably specifically as follows:

[0049] After the modified asphalt is applied to the surface layer of the asphalt waterproofing membrane, the composite process is completed by secondary coating of the modified asphalt and rolling to determine the thickness at 180°C~210°C; the thickness determined by rolling is preferably 3mm~5mm, more preferably 4mm.

[0050] In the present invention, the specific operation of the coating includes: allowing the modified asphalt at a temperature of 180°C to 220°C to flow out from the die in the coating section of the coil forming process, coating it on the surface of the ordinary asphalt waterproof coil, smoothing and determining the thickness of the modified asphalt coating, and finally cooling and solidifying it to form it.

[0051] In the present invention, the cooling temperature is preferably 20°C to 30°C.

[0052] The preparation method provided by the present invention can ensure that each layer has a high bonding force, so that interlayer separation does not occur, and the process is simple, easy to operate, and suitable for large-scale industrial production.

[0053] The present invention provides an exposed modified asphalt waterproofing roll material, comprising: an asphalt waterproofing roll material; a modified asphalt layer compounded on the surface layer of the asphalt waterproofing roll material; the modified asphalt layer is prepared from modified asphalt including thermoplastic vulcanized rubber and random polypropylene. Compared with the prior art, the present invention uses thermoplastic vulcanized rubber (TPV) and random polypropylene (APP) that are resistant to heat oxygen aging, ultraviolet aging and high temperature to modify waterproof asphalt, and the modified asphalt is coated on the surface layer of the asphalt waterproofing roll material during the processing process to achieve overall good interaction, and finally form an asphalt waterproofing roll material that can be exposed for use; the product can make the asphalt roll material exposed for use without a protective layer, thereby improving engineering efficiency and cost; at the same time, compared with other exposed waterproofing roll materials, the roll material of the present invention is a conventional asphalt roll material surface layer coated with asphalt modified by an aging-resistant modifier, has a small self-weight, does not debond with conventional asphalt roll materials, has a low material cost, can be used as a waterproof layer of waterproofing roll materials, and has a reduced application cost.

[0054] In addition, the preparation method provided by the present invention can ensure that each layer has a high bonding force, so that interlayer separation does not occur, and the process is simple, easy to operate, and suitable for large-scale industrial production.

[0055] In order to further illustrate the present invention, the following examples are used for detailed description. The raw materials used in the following examples of the present invention are all commercially available products; among them, TPV uses ExxonMobil 121-80B265 extrusion TPV, APP uses commercially available random polypropylene, ExxonMobil APP-LNX-299, and waterproof asphalt uses Jingbo Haiyun 70# and Haiyun 200# asphalt; the ordinary SBS modified asphalt waterproofing membrane used is 3mm thick type II elastomer modified asphalt waterproofing membrane, and its performance meets the national standard "GB18242-2008 Elastomer modified asphalt waterproofing membrane".

[0056] Example

[0057] (1) Mix 70# and 200# asphalt in a mass ratio of 2:3, heat to 180°C, and stir at 200 r / min for 15 min until uniform; then add 15 wt% of TPV and 8 wt% of APP to the total mass of asphalt, heat to 210°C, turn on the shearing machine, adjust the speed to 3000 r / min, and shear for 60 min until the shearing mixture is uniform to obtain modified asphalt.

[0058] (2) At 210°C, the modified asphalt is applied to the upper layer of the ordinary SBS modified asphalt waterproofing membrane with a thickness of 1 mm; then, at a temperature of 180-210°C, the modified asphalt is applied for a second time, rolled to determine the thickness, and cooled to room temperature to produce an exposed modified asphalt waterproofing membrane with a total thickness of 4 mm.

[0059] Performance test and effect data:

[0060] The new roll provided by the embodiment of the present invention has a roll length of 10 meters and a roll weight of about 45 kg, which is 33.8% lighter than the traditional shale waterproof roll weighing 68 kg. The waterproof performance of the roll is in accordance with the impermeability test requirements of "GB18242-2008 Elastomer Modified Asphalt Waterproof Roll", and it passes the 0.3MPa, 30min impermeability test. Anti-aging test: the upper surface of the roll is subjected to a cumulative irradiation of 1500MJ / m2 of xenon arc lamp according to GB / T18244. 2 After testing, there is no sliding, flowing or dripping of the coiled material, and the aging performance after exposure meets the requirements.

[0061] Comparative Example 1

[0062] The preparation method provided in Example 1 was adopted, except that only 23 wt% of TPV of the total mass of asphalt was added.

[0063] Performance test and effect data:

[0064] The new roll provided in Comparative Example 1 is 10 meters per roll, and the roll weight is about 45 kg; the waterproof performance of the roll is in accordance with the impermeability test requirements of "GB18242-2008 Elastomer Modified Asphalt Waterproof Roll", and passes the 0.3MPa, 30min impermeability test; anti-aging test: the upper surface of the roll is subjected to a cumulative irradiation of 1500MJ / m by a xenon arc lamp in accordance with GB / T18244 2 Afterwards, the coiled material slides and flows slightly without dripping, and the aging performance for exposed use does not meet the requirements.

[0065] Comparative Example 2

[0066] The preparation method provided in Example 1 was adopted, except that only 23 wt% of APP in the total mass of asphalt was added.

[0067] Performance test and effect data:

[0068] The new roll provided in Comparative Example 2 is 10 meters per roll, and the roll weight is about 45.5 kg; the waterproof performance of the roll is based on the impermeability test requirements of "GB18242-2008 Elastomer Modified Asphalt Waterproof Roll", and it did not pass the 0.3MPa, 30min impermeability test; anti-aging test: the upper surface of the roll is exposed to a cumulative xenon arc lamp of 1500MJ / m according to GB / T18244 2 Afterwards, the coiled material showed obvious sliding, flowing and dripping, and the aging performance for exposed use did not meet the requirements.

[0069] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An exposed modified asphalt waterproofing membrane, comprising: Asphalt waterproofing membrane; A modified asphalt layer compounded on the surface layer of the asphalt waterproofing membrane; The modified asphalt layer is prepared from modified asphalt including thermoplastic vulcanized rubber and random polypropylene.

2. The exposed modified asphalt waterproofing membrane according to claim 1, characterized in that: The asphalt waterproofing membrane is an SBS modified asphalt waterproofing membrane.

3. The exposed modified asphalt waterproofing membrane according to claim 1, characterized in that: In the modified asphalt, the mass fraction of thermoplastic vulcanized rubber is 8% to 20%, and the mass fraction of random polypropylene is 6% to 12%.

4. The exposed modified asphalt waterproofing membrane according to claim 1, characterized in that: The thickness of the exposed modified asphalt waterproofing membrane is 3mm~5mm.

5. A method for preparing the exposed modified asphalt waterproofing membrane according to any one of claims 1 to 4, comprising the following steps: a) After heating the base asphalt, adding thermoplastic vulcanized rubber and random polypropylene, and shearing, to obtain modified asphalt; b) coating the modified asphalt obtained in step a) on the surface layer of the asphalt waterproofing membrane at 180° C. to 220° C., compounding, and cooling to obtain an exposed modified asphalt waterproofing membrane.

6. The preparation method according to claim 5, characterized in that: The matrix asphalt in step a) is selected from one or more of 70# asphalt, 200# asphalt and blended asphalts thereof.

7. The preparation method according to claim 5, characterized in that: The process of heating the base asphalt in step a) is specifically as follows: Heat the base asphalt to 170℃~190℃, and stir at a speed of 150r / min~250r / min for 10min~20min until it is uniform.

8. The preparation method according to claim 5, characterized in that: The shearing temperature in step a) is 200° C. to 220° C., the rotation speed is 2500 r / min to 3500 r / min, and the time is 50 min to 70 min.

9. The preparation method according to claim 5, characterized in that: The coating thickness in step b) is ≥ 0.5 mm.

10. The preparation method according to claim 5, characterized in that: The compounding process in step b) is specifically as follows: After applying the modified asphalt to the surface layer of the asphalt waterproofing membrane, the composite process is completed by secondary coating of the modified asphalt and rolling to determine the thickness at 180℃~210℃.