CN113637266A - High-weather-resistance TPO (thermoplastic polyolefin) waterproof coiled material as well as preparation method and application thereof - Google Patents
High-weather-resistance TPO (thermoplastic polyolefin) waterproof coiled material as well as preparation method and application thereof Download PDFInfo
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- CN113637266A CN113637266A CN202111042271.XA CN202111042271A CN113637266A CN 113637266 A CN113637266 A CN 113637266A CN 202111042271 A CN202111042271 A CN 202111042271A CN 113637266 A CN113637266 A CN 113637266A
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- 239000000463 material Substances 0.000 title claims abstract description 46
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 229920002397 thermoplastic olefin Polymers 0.000 title description 68
- 229920005989 resin Polymers 0.000 claims abstract description 40
- 239000011347 resin Substances 0.000 claims abstract description 40
- 239000004611 light stabiliser Substances 0.000 claims abstract description 35
- 239000000945 filler Substances 0.000 claims abstract description 20
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 19
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 19
- 239000003605 opacifier Substances 0.000 claims abstract description 19
- 230000002745 absorbent Effects 0.000 claims abstract description 16
- 239000002250 absorbent Substances 0.000 claims abstract description 16
- 239000002994 raw material Substances 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 claims abstract description 14
- 238000004078 waterproofing Methods 0.000 claims description 27
- 239000012528 membrane Substances 0.000 claims description 23
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 18
- 239000000203 mixture Substances 0.000 claims description 16
- 238000001125 extrusion Methods 0.000 claims description 12
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 11
- 229910052791 calcium Inorganic materials 0.000 claims description 11
- 239000011575 calcium Substances 0.000 claims description 11
- 238000002156 mixing Methods 0.000 claims description 11
- 238000003490 calendering Methods 0.000 claims description 9
- 239000004408 titanium dioxide Substances 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 8
- 238000005096 rolling process Methods 0.000 claims description 7
- 239000006097 ultraviolet radiation absorber Substances 0.000 claims description 5
- 230000007123 defense Effects 0.000 abstract description 8
- 230000008569 process Effects 0.000 abstract description 6
- 230000007774 longterm Effects 0.000 abstract description 4
- 230000032683 aging Effects 0.000 description 23
- 238000012360 testing method Methods 0.000 description 17
- 238000003878 thermal aging Methods 0.000 description 14
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 8
- 230000000694 effects Effects 0.000 description 8
- 239000012752 auxiliary agent Substances 0.000 description 6
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 description 6
- 229910052901 montmorillonite Inorganic materials 0.000 description 6
- 150000003254 radicals Chemical class 0.000 description 6
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- 238000006243 chemical reaction Methods 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
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- 230000001681 protective effect Effects 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- 229920000181 Ethylene propylene rubber Polymers 0.000 description 1
- JKIJEFPNVSHHEI-UHFFFAOYSA-N Phenol, 2,4-bis(1,1-dimethylethyl)-, phosphite (3:1) Chemical compound CC(C)(C)C1=CC(C(C)(C)C)=CC=C1OP(OC=1C(=CC(=CC=1)C(C)(C)C)C(C)(C)C)OC1=CC=C(C(C)(C)C)C=C1C(C)(C)C JKIJEFPNVSHHEI-UHFFFAOYSA-N 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- BGYHLZZASRKEJE-UHFFFAOYSA-N [3-[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxy]-2,2-bis[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxymethyl]propyl] 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CCC(=O)OCC(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 BGYHLZZASRKEJE-UHFFFAOYSA-N 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
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- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012964 benzotriazole Substances 0.000 description 1
- 150000001565 benzotriazoles Chemical class 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
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- 150000001875 compounds Chemical class 0.000 description 1
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- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
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- 229910017053 inorganic salt Inorganic materials 0.000 description 1
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- 229920001155 polypropylene Polymers 0.000 description 1
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- 239000002904 solvent Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000000516 sunscreening agent Substances 0.000 description 1
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- 229910001428 transition metal ion Inorganic materials 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/16—Elastomeric ethene-propene or ethene-propene-diene copolymers, e.g. EPR and EPDM rubbers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/12—Polypropene
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
- E04D5/00—Roof covering by making use of flexible material, e.g. supplied in roll form
- E04D5/10—Roof covering by making use of flexible material, e.g. supplied in roll form by making use of compounded or laminated materials, e.g. metal foils or plastic films coated with bitumen
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
Abstract
The invention provides a high-weather-resistance TPO waterproof coiled material and a preparation method and application thereof, wherein the preparation raw materials of the high-weather-resistance TPO waterproof coiled material comprise the following components in percentage by weight: 75-90% of TPO resin; 7-15% of a filler; 2-8% of an opacifier; 0.1-0.4% of ultraviolet absorbent; 0.5-1% of a light stabilizer; 0.4-0.6% of antioxidant. According to the invention, multiple defense lines and multiple systems are constructed, so that the TPO waterproof coiled material can keep long-term and efficient weather resistance in the use process.
Description
Technical Field
The invention belongs to the technical field of waterproof rolls, and relates to a high-weather-resistance TPO waterproof roll as well as a preparation method and application thereof.
Background
TPO waterproof coiled material, i.e. thermoplastic polyolefin waterproof coiled material, is a novel waterproof coiled material prepared by taking Thermoplastic Polyolefin (TPO) synthetic resin which is formed by combining ethylene propylene rubber and polypropylene as a base material and adding auxiliary agents such as an antioxidant, an anti-aging agent, a softener and the like. Exposed TPO waterproofing membrane is very strict to the requirement of weatherability, and ultraviolet radiation can make TPO waterproofing membrane inside produce the free radical, and then product ageing with higher speed to strong sunlight shines the temperature that can cause the roof and risees, destroys the coiled material, thereby shortens the life of coiled material. The existing exposed TPO waterproof coiled material generally has the phenomenon of insufficient weather resistance.
TPO waterproofing membrane main part material is multiple polyolefin, and its inside has straight chain, branch chain and the netted crosslinked structure in space, and branch chain and straight chain structure receive high temperature highlight to influence easy degradation removal, are the not enough risk region of weatherability, and the netted crosslinked structure in space is then stable firm, therefore improves the occupation of space network structure in the sheet and compares, has then reduced the risk region, can let the weatherability of material have very big promotion. At present, the means for improving the weather resistance of the exposed TPO waterproof coiled material is single, the auxiliary agent is added to absorb energy, however, after long-time action, after the auxiliary agent absorbs energy and is decomposed, the subsequent polymer can also be degraded under the action of light and heat, and the material loses the weather resistance.
CN112708181A discloses a nano modified weather-resistant TPO waterproof coiled material, which is prepared by mixing TPO resin, a flame retardant, a dispersant, a modified filler and a composite intercalation modified auxiliary agent, then melting, plasticizing and extruding, and then performing calendaring, cooling and rolling; the composite intercalation modification auxiliary agent is obtained by firstly carrying out primary modification treatment on montmorillonite by using transition metal ion inorganic salt, then dispersing the montmorillonite subjected to primary modification into a solvent, heating to 60-90 ℃, adding an ultraviolet absorbent, an organic weak reducing agent and a free radical trapping agent, carrying out condensation reflux for 1-2 hours to obtain a suspension, filtering the suspension to obtain a precipitate, washing the precipitate by using deionized water, drying, grinding and sieving; according to the invention, through modification treatment of montmorillonite, and doping of montmorillonite into TPO waterproof coiled material, the surface energy of montmorillonite is effectively reduced, so that the interlayer of montmorillonite is changed from hydrophilicity to lipophilicity, and the dispersion effect in polyolefin resin is improved. The preparation method of the invention is complex, and the weather resistance of the invention needs to be further improved.
Therefore, in the art, development of a TPO waterproofing membrane with high weather resistance is desired.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a TPO waterproof coiled material with high weather resistance, and a preparation method and application thereof. According to the invention, multiple defense lines and multiple systems are constructed, so that the TPO waterproof coiled material can keep long-term and efficient weather resistance in the use process.
In order to achieve the purpose, the invention adopts the following technical scheme:
according to a first aspect, the invention provides a high-weatherability TPO waterproof coiled material, which comprises the following raw materials in percentage by weight:
the TPO resin is used as the main resin, multiple defense lines are constructed by multiple means, the anti-light aging performance of the TPO waterproof coiled material is effectively and long-term improved, specifically, a first barrier is constructed by adding an opacifier, and the opacifier can reflect most ultraviolet light to effectively inhibit the light aging of the material; a second defense line is constructed by adding an ultraviolet absorbent which has characteristic strong absorption to ultraviolet rays; a third defense line is constructed by adding a light stabilizer, and the light stabilizer can prevent the chain reaction from spreading by capturing active free radicals, thereby achieving the stable effect. In addition, the invention improves the heat-oxygen aging resistance of the material by adding the antioxidant.
The high weather resistance of the invention means that the TPO waterproof coiled material is tested according to a method 7.9 and a method 7.13 in ASTM D6878/D6878M-19, the quality change of the TPO waterproof coiled material after thermal aging is within +/-1.5%, the TPO waterproof coiled material after thermal aging has no crack at a low temperature of 50 ℃ below zero, and the TPO waterproof coiled material after thermal aging and ultraviolet aging has no crack (crack observed by a 7-time magnifier).
In the present invention, the amount of the TPO resin used in the raw material for the highly weatherable TPO waterproofing membrane may be 75%, 76%, 77%, 78%, 79%, 80%, 81%, 82%, 83%, 84%, 85%, 86%, 87%, 88%, 89%, 90%, or the like.
In the present invention, the filler may be used in an amount of 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14%, 15%, or the like, in the raw material for preparing the highly weather-resistant TPO waterproofing membrane.
In the present invention, the amount of the light-shading agent used in the raw material for preparing the highly weather-resistant TPO waterproofing membrane may be 2%, 3%, 4%, 5%, 6%, 7%, 8%, or the like.
In the present invention, the amount of the ultraviolet absorber used in the raw material for preparing the highly weather-resistant TPO waterproofing membrane may be 0.1%, 0.2%, 0.3%, 0.4%, or the like.
In the present invention, the amount of the light stabilizer used in the raw material for preparing the highly weather-resistant TPO waterproofing membrane may be 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1%, or the like.
In the present invention, the antioxidant may be used in an amount of 0.4%, 0.45%, 0.5%, 0.55%, 0.6%, etc. in the raw material for preparing the highly weather-resistant TPO waterproof sheet.
Preferably, the TPO resin comprises resin CA10A or a mixture of resin CA10A and resin CA60A, preferably a mixture of resin CA10A and resin CA 60A.
As the preferable technical scheme of the invention, the mixture of the resin CA10A and the resin CA60A is selected as the main resin, on one hand, the space network structure of the resin CA10A and the resin CA60A is not easy to damage, and the material aging risk caused by molecular chain fracture is reduced; on the other hand, the material has excellent processing property through the proportioning design of CA10A and CA 60A.
Preferably, the mass ratio of the resin CA10A to the resin CA60A is (1-2): 1, such as 1:1, 1.2:1, 1.3:1, 1.5:1, 1.8:1 or 2: 1.
Preferably, the filler comprises activated light calcium or light calcium, preferably activated light calcium.
As a preferred technical scheme of the invention, when the active light calcium carbonate is used as the filler, the active light calcium carbonate shows better dispersity after being modified by the surface modifier, and the risk area which is easy to age and caused by agglomeration is reduced.
Preferably, the opacifier includes titanium dioxide, such as DuPont titanium dioxide R-105.
Preferably, the ultraviolet absorber comprises UV328 and/or UV326, preferably UV 328. UV328 is a phenol-substituted benzotriazole ultraviolet absorbent, can efficiently absorb ultraviolet light, and converts the energy of the ultraviolet light into a harmless heat energy form to be discharged.
Preferably, the light stabilizer comprises light stabilizer 2020. The light stabilizer 2020 is a free radical trapping type light stabilizer, and can trap active free radicals, prevent chain reaction from spreading, and achieve a stable effect.
Preferably, the antioxidant comprises B225. B225 is a mixture of an antioxidant 1010 and an antioxidant 168, and has outstanding processing stability and long-term protection effect on polyolefin.
In a second aspect, the present invention provides a method for preparing the high weather resistance TPO waterproof roll according to the first aspect, the method comprising the following steps:
(1) adding TPO resin with a formula amount into a double-screw extruder from a main feeding port;
(2) mixing the filler, the opacifier, the ultraviolet absorbent, the light stabilizer and the antioxidant according to the formula ratio, adding the mixture into a double-screw extruder from a side feeding port, carrying out extrusion molding, then carrying out calendaring to obtain a sheet, and carrying out post-treatment to obtain the high-weather-resistance TPO waterproof coiled material.
Preferably, the temperature of the feeding section of the twin-screw extruder during the extrusion in the step (2) is 155-175 ℃, such as 155 ℃, 160 ℃, 165 ℃, 170 ℃ or 175 ℃, the temperature of the plasticizing section is 180-190 ℃, such as 180 ℃, 183 ℃, 185 ℃, 188 ℃ or 190 ℃, the temperature of the homogenizing section is 185-195 ℃, such as 185 ℃, 188 ℃, 190 ℃, 193 ℃ or 195 ℃, and the temperature of the die orifice is 200-210 ℃, such as 200 ℃, 203 ℃, 205 ℃, 208 ℃ or 210 ℃.
Preferably, the calendering of step (2) into sheets is carried out by a three-roll calender.
Preferably, the three-roll calender has a top roll temperature of 60 to 70 ℃, such as 60 ℃, 63 ℃, 65 ℃, 68 ℃ or 70 ℃, and a middle roll temperature of 55 to 65 ℃, such as 55 ℃, 58 ℃, 60 ℃, 63 ℃ or 65 ℃.
Preferably, the post-treatment comprises cooling and rolling.
In a third aspect, the present invention provides the use of the high weatherability TPO waterproofing membrane of the first aspect in waterproofing buildings, for example, the high weatherability TPO waterproofing membrane of the present invention can be used in single layer roofing systems.
Compared with the prior art, the invention has at least the following beneficial effects:
the invention adopts multiple means to construct multiple defense lines to efficiently and long-effectively improve the anti-photoaging performance of the TPO waterproof coiled material, and particularly, a first barrier is constructed by adding an opacifier which can reflect most ultraviolet light so as to effectively inhibit the photoaging of the material; a second defense line is constructed by adding an ultraviolet absorbent which has characteristic strong absorption to ultraviolet rays; a third defense line is constructed by adding a light stabilizer, and the light stabilizer can prevent the chain reaction from spreading by capturing active free radicals, thereby achieving the stable effect. In addition, the antioxidant is added to improve the thermal oxidation aging resistance of the material, so that the prepared TPO waterproof coiled material has higher photo-thermal oxidation stability, namely high weather resistance (the mass change rate after aging is-0.68% -0.79%, no crack is generated after low-temperature bending after thermal aging, no crack is generated after thermal aging and ultraviolet aging, and the appearance is normal after thermal aging).
Detailed Description
The technical solution of the present invention is further explained by the following embodiments. It should be understood by those skilled in the art that the examples are only for the understanding of the present invention and should not be construed as the specific limitations of the present invention.
Resins CA10A and CA60A used in the examples of the present invention were obtained from RiandBarcel industries, Inc.; the mesh number of the active light calcium is 1250 meshes; the titanium dioxide is DuPont titanium dioxide R-105; UV328, light stabilizer 2020, and antioxidant B225 were all available from Pasteur Corp.
Example 1
In this embodiment, a high weather resistance TPO waterproof roll is provided, and raw materials for preparing the high weather resistance TPO waterproof roll comprise the following components in percentage by weight:
wherein the filler is active light calcium, the opacifier is titanium dioxide, the ultraviolet absorbent is UV328, the light stabilizer is light stabilizer 2020, and the antioxidant is B225.
The preparation method comprises the following steps:
(1) uniformly mixing resin CA10A and resin CA60A according to the formula ratio, and adding the mixture into a double-screw extruder from a main feeding port;
(2) uniformly mixing the filler, the opacifier, the ultraviolet absorbent, the light stabilizer and the antioxidant according to the formula ratio, adding the mixture into a double-screw extruder from a side feeding port, carrying out extrusion molding, then carrying out calendaring by a three-roller calendar to form sheets, cooling and rolling to obtain the high-weather-resistance TPO waterproof coiled material.
Wherein, the temperature of the feeding section of the double-screw extruder in the extrusion process of the step (2) is 160 ℃, the temperature of the plasticizing section is 185 ℃, the temperature of the homogenizing section is 190 ℃, and the temperature of the die orifice is 205 ℃; the temperature of the upper roll of the three-roll calender is 65 ℃ and the temperature of the middle roll is 60 ℃.
Example 2
In this embodiment, a high weather resistance TPO waterproof roll is provided, and raw materials for preparing the high weather resistance TPO waterproof roll comprise the following components in percentage by weight:
wherein the filler is active light calcium, the opacifier is titanium dioxide, the ultraviolet absorbent is UV326, the light stabilizer is light stabilizer 2020, and the antioxidant is B225.
The preparation method comprises the following steps:
(1) uniformly mixing resin CA10A and resin CA60A according to the formula ratio, and adding the mixture into a double-screw extruder from a main feeding port;
(2) uniformly mixing the filler, the opacifier, the ultraviolet absorbent, the light stabilizer and the antioxidant according to the formula ratio, adding the mixture into a double-screw extruder from a side feeding port, carrying out extrusion molding, then carrying out calendaring by a three-roller calendar to form sheets, cooling and rolling to obtain the high-weather-resistance TPO waterproof coiled material.
Wherein, the temperature of the feeding section of the double-screw extruder in the extrusion process of the step (2) is 155 ℃, the temperature of the plasticizing section is 180 ℃, the temperature of the homogenizing section is 185 ℃, and the temperature of the die orifice is 200 ℃; the temperature of the upper roll of the three-roll calender is 60 ℃, and the temperature of the middle roll is 55 ℃.
Example 3
In this embodiment, a high weather resistance TPO waterproof roll is provided, and raw materials for preparing the high weather resistance TPO waterproof roll comprise the following components in percentage by weight:
wherein the filler is active light calcium, the opacifier is titanium dioxide, the ultraviolet absorbent is UV328, the light stabilizer is light stabilizer 2020, and the antioxidant is B225.
The preparation method comprises the following steps:
(1) uniformly mixing resin CA10A and resin CA60A according to the formula ratio, and adding the mixture into a double-screw extruder from a main feeding port;
(2) uniformly mixing the filler, the opacifier, the ultraviolet absorbent, the light stabilizer and the antioxidant according to the formula ratio, adding the mixture into a double-screw extruder from a side feeding port, carrying out extrusion molding, then carrying out calendaring by a three-roller calendar to form sheets, cooling and rolling to obtain the high-weather-resistance TPO waterproof coiled material.
Wherein, the temperature of the feeding section of the double-screw extruder in the extrusion process of the step (2) is 175 ℃, the temperature of the plasticizing section is 190 ℃, the temperature of the homogenizing section is 195 ℃, and the temperature of the die orifice is 210 ℃; the temperature of the upper roll of the three-roll calender is 70 ℃ and the temperature of the middle roll is 65 ℃.
Example 4
In this embodiment, a high weather resistance TPO waterproof roll is provided, and raw materials for preparing the high weather resistance TPO waterproof roll comprise the following components in percentage by weight:
wherein the filler is active light calcium, the opacifier is titanium dioxide, the ultraviolet absorbent is UV328, the light stabilizer is light stabilizer 2020, and the antioxidant is B225.
The preparation method comprises the following steps:
(1) uniformly mixing resin CA10A and resin CA60A according to the formula ratio, and adding the mixture into a double-screw extruder from a main feeding port;
(2) uniformly mixing the filler, the opacifier, the ultraviolet absorbent, the light stabilizer and the antioxidant according to the formula ratio, adding the mixture into a double-screw extruder from a side feeding port, carrying out extrusion molding, then carrying out calendaring by a three-roller calendar to form sheets, cooling and rolling to obtain the high-weather-resistance TPO waterproof coiled material.
Wherein, the temperature of the feeding section of the double-screw extruder in the extrusion process of the step (2) is 160 ℃, the temperature of the plasticizing section is 185 ℃, the temperature of the homogenizing section is 190 ℃, and the temperature of the die orifice is 205 ℃; the temperature of the upper roll of the three-roll calender is 65 ℃ and the temperature of the middle roll is 60 ℃.
Example 5
This example is different from example 1 only in that the ultraviolet absorber UV328 is replaced with the same amount of UV9, and the other conditions are the same as example 1.
Example 6
This example differs from example 1 only in that the resin CA60A was not included in the starting materials, the weight percentage of the resin CA60A was 83.6%, and the other conditions were the same as in example 1.
Example 7
This example is different from example 1 only in that the light stabilizer 2020 was replaced with the same amount of the basf light stabilizer 944, and the other conditions were the same as example 1.
Example 8
This example is different from example 1 only in that the active light calcium carbonate as a filler was replaced with the same amount of light calcium carbonate, and the other conditions were the same as example 1.
Comparative example 1
This comparative example differs from example 1 only in that the sunscreen agent was not included in the starting materials, the filler content was 15% by weight, and the other conditions were the same as in example 1.
Comparative example 2
This comparative example is different from example 1 only in that the ultraviolet absorber was not included in the preparation raw materials, the weight percentage of the filler was 10.3%, and the other conditions were the same as example 1.
Comparative example 3
This comparative example differs from example 1 only in that the light stabilizer was not included in the starting materials, the weight percentage of the filler was 10.6%, and the other conditions were the same as in example 1.
The TPO waterproofing membranes of examples 1-8 and comparative examples 1-3 were subjected to a performance test as follows:
(1) mass change rate after heat aging: before thermal aging treatment, TPO waterproof coiled material test piece is dried by an oven and cooled to room temperature, and then the test piece mass (m) is immediately weighed1) The test pieces were subjected to heat aging treatment in accordance with ASTM D6878/D6878M-19, and immediately after cooling to room temperature, the mass (m) of the test pieces was measured2) The mass change rate of the test piece after thermal aging is calculated according to the following formula:
(2) low temperature bending performance after thermal aging: carrying out heat aging treatment on the test piece according to the method of ASTM D6878/D6878M-19, and then testing according to GB/T328.15, wherein the testing temperature is-50 ℃, and observing whether the test piece has cracks or not;
(3) carrying out thermal aging treatment on the test piece according to the method of ASTM D6878/D6878M-19, then immediately flatly placing the test piece on a horizontal operation surface, and observing whether the surface of the test piece has obvious cracks by using a 7-time magnifier; carrying out ultraviolet aging treatment on the test piece according to the method of ASTM D6878/D6878M-19, then immediately flatly placing the test piece on a horizontal operation surface, and observing whether the surface of the test piece has cracks or not by using a 7-time magnifier;
(4) the test pieces were subjected to heat aging treatment in accordance with ASTM D6878/D6878M-19, and then the appearance of the test pieces was observed.
The results of the performance tests are shown in table 1.
TABLE 1
Remarking: in Table 1, "pass" means no cracking and "fail" means cracking.
As can be seen from Table 1, the TPO waterproof rolls provided in the embodiments 1 to 4 of the invention have a mass change rate of-0.68% to-0.79% after thermal aging, no crack at low temperature after thermal aging, no crack after thermal aging and ultraviolet aging, and normal appearance after thermal aging, that is, the TPO waterproof rolls provided in the embodiments 1 to 4 of the invention have high weather resistance.
Compared with the example 1, the TPO waterproof coiled material prepared in the example 5 has cracks after being subjected to low-temperature bending after being subjected to heat aging, cracks after being subjected to heat aging and ultraviolet aging, and has moderate yellowing and chalking signs after being subjected to heat aging, which shows that the TPO waterproof coiled material has better effect when being subjected to UV328 compared with the TPO waterproof coiled material using UV 9; the TPO waterproofing membrane prepared in example 7 has cracks at low temperature bending after heat aging, and has a yellowish and chalky appearance after heat aging, which shows that the use of light stabilizer 2020 has a better effect than the use of light stabilizer 944.
Compared with example 1, although the weather resistance of the TPO waterproof coiled material prepared in example 6 is not obviously changed, the processing performance is poor; the TPO waterproofing membrane prepared in example 8 has a slight yellowing in appearance after heat aging.
The TPO waterproofing rolls prepared in comparative examples 1 to 3 were inferior in weather resistance to example 1, which indicates that the absence of any of the three protective lines of opacifier, uv absorber and light stabilizer in the system resulted in the waterproofing rolls eventually showing insufficient weather resistance, yellowing and chalking in appearance, and the data showed that the effects of opacifier and uv absorber were greater than those of light stabilizer, i.e., the first and second protective lines were more important.
Comprehensively, the TPO compound system resin is used as a main body, three light aging system defensive lines are constructed by adding auxiliary agents such as an opacifier, an ultraviolet absorbent, a light stabilizer and the like, the thermal oxidation aging resistance is enhanced by adding an antioxidant, and the prepared TPO waterproof coiled material has high weather resistance and is suitable for being applied to a single-layer roof system.
The applicant states that the present invention is illustrated by the above examples to the highly weather-resistant TPO waterproofing membrane of the present invention and the preparation method and application thereof, but the present invention is not limited to the above examples, that is, it does not mean that the present invention must be implemented by the above examples. It should be understood by those skilled in the art that any modification of the present invention, equivalent substitutions of the raw materials of the product of the present invention, addition of auxiliary components, selection of specific modes, etc., are within the scope and disclosure of the present invention.
Claims (10)
1. The high-weather-resistance TPO waterproof coiled material is characterized by comprising the following raw materials in percentage by weight:
2. the highly weatherable TPO waterproofing membrane according to claim 1 wherein said TPO resin comprises resin CA10A or a mixture of resin CA10A and resin CA60A, preferably a mixture of resin CA10A and resin CA 60A;
preferably, the mass ratio of the resin CA10A to the resin CA60A is (1-2): 1.
3. Highly weatherable TPO waterproofing membrane according to claim 1 or 2, characterized in that the filler comprises activated light calcium or light calcium, preferably activated light calcium.
4. The highly weatherable TPO waterproofing membrane according to any of claims 1 to 3 wherein the opacifier comprises titanium dioxide.
5. The highly weatherable TPO waterproofing membrane according to any of claims 1 to 4, wherein said ultraviolet absorber comprises UV328 and/or UV326, preferably UV 328.
6. The highly weatherable TPO waterproofing membrane according to any of claims 1 to 5, wherein said light stabilizer comprises light stabilizer 2020.
7. The highly weatherable TPO waterproofing membrane according to any of claims 1 to 6, wherein said antioxidant comprises B225.
8. The method for preparing a high weather-resistant TPO waterproofing membrane according to any of claims 1 to 7, characterized in that it comprises the following steps:
(1) adding TPO resin with a formula amount into a double-screw extruder from a main feeding port;
(2) mixing the filler, the opacifier, the ultraviolet absorbent, the light stabilizer and the antioxidant according to the formula ratio, adding the mixture into a double-screw extruder from a side feeding port, carrying out extrusion molding, then carrying out calendaring to obtain a sheet, and carrying out post-treatment to obtain the high-weather-resistance TPO waterproof coiled material.
9. The preparation method of claim 8, wherein the temperature of the feeding section of the twin-screw extruder during the extrusion in the step (2) is 155-175 ℃, the temperature of the plasticizing section is 180-190 ℃, the temperature of the homogenizing section is 185-195 ℃, and the temperature of the die orifice is 200-210 ℃;
preferably, the calendering of the step (2) into sheets is carried out by a three-roll calender;
preferably, the temperature of the upper roll of the three-roll calender is 60-70 ℃, and the temperature of the middle roll is 55-65 ℃;
preferably, the post-treatment comprises cooling and rolling.
10. Use of the highly weatherable TPO waterproofing membrane according to any of claims 1 to 7 for waterproofing buildings.
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