CN112724689B - PVB (polyvinyl butyral) membrane with good weather resistance and preparation method thereof - Google Patents
PVB (polyvinyl butyral) membrane with good weather resistance and preparation method thereof Download PDFInfo
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Abstract
The invention provides a PVB (polyvinyl butyral) membrane with good weather resistance, which comprises the following raw materials in parts by weight: 55-65 parts of modified grafted PVB resin, 15-25 parts of graphene emulsion, 10-20 parts of zeolite-based composite weather-resistant agent, 2-8 parts of active dispersant and 1-5 parts of dibutyl sebacate toughening agent. The bentonite is treated in a rare earth medium to enhance the activity of the bentonite, the bentonite is complete in organic and inorganic performances after being treated by a coupling agent, and meanwhile, the bentonite has a lamellar structure, can play a holding function between lamellar layers and is introduced onto PVB resin in a grafting manner, so that the binding force among the PVB resin, inorganic raw materials and organic raw materials can be obviously enhanced, and the weather resistance of the product is integrally improved.
Description
Technical Field
The invention relates to the technical field of PVB (polyvinyl butyral) membranes, in particular to a PVB membrane with good weather resistance and a preparation method thereof.
Background
The PVB glued membrane is called PVB film, PVB intermediate coat etc. again, and the chemical name is: a polyvinyl butyral film. The PVB plasticizer is a thermoplastic resin film and is produced by PVB resin and a plasticizer. The PVB adhesive film can be widely applied to building laminated glass, automobile laminated glass, solar photovoltaic glass, bulletproof glass, sound insulation glass and the like. Has good safety, and can prevent the glass from being broken under the action of external force and prevent fragments from splashing to hurt people. In addition, the coating has sound insulation and ultraviolet resistance, can be made into colorful or high-transparency coating, and has optical application value, such as application of solar photovoltaic.
The existing PVB membrane mostly adopts PVB resin to be combined with conventional raw materials, the combined product has general performance and poor weather resistance, and further improvement treatment is needed.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a PVB film with good weather resistance and a preparation method thereof.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the invention provides a PVB (polyvinyl butyral) membrane with good weather resistance, which comprises the following raw materials in parts by weight:
55-65 parts of modified grafted PVB resin, 15-25 parts of graphene emulsion, 10-20 parts of zeolite-based composite weather-resistant agent, 2-8 parts of active dispersant and 1-5 parts of dibutyl sebacate toughening agent;
the preparation method of the modified grafted PVB resin comprises the following steps:
s1, PVB resin surface treatment: the PVB resin is firstly sent into a sodium carbonate solution with the mass fraction of 2-6% to be soaked for 10-20min, the soaking temperature is 45-55 ℃, then the PVB resin is taken out and dried, then the PVB resin is irradiated by cobalt 60-gamma rays for 20-30min, the irradiation power is 150-250W, and the PVB resin is obtained after the irradiation is finished;
s2, steam explosion treatment: feeding PVB resin into the blasting pretreatment liquid, then carrying out microwave treatment for 10-20min with the treatment power of 20-50W, finishing the treatment, then feeding the PVB resin into a steam blasting machine for blasting treatment with the blasting pressure of 1-2MPa, and finally washing and drying the PVB resin;
s3, grafting pretreatment: the PVB resin subjected to steam explosion and 10-20% of vinyl trimethoxy silane are stirred and mixed at a high speed, the mixing speed is 1000-1500r/min, and the mixing time is 20-30 min;
s4, preparation of modified grafted PVB resin: and (3) feeding the PVB resin subjected to grafting pretreatment of S3 and a grafting reactant into a reaction kettle together, reacting at the temperature of 125-135 ℃ for 15-25min at the reaction speed of 300-500r/min, finishing the reaction, and finally washing and drying.
Preferably, the PVB membrane with good weather resistance comprises the following raw materials in parts by weight:
60 parts of modified grafted PVB resin, 20 parts of graphene emulsion, 15 parts of zeolite-based composite weather-resistant agent, 5 parts of active dispersant and 3 parts of dibutyl sebacate toughening agent.
Preferably, the preparation method of the blasting pretreatment liquid comprises the following steps: preparing sodium hydroxide and deionized water into alkali liquor according to the weight ratio of 1:50, then feeding the alkali liquor into a reaction kettle, then adding sodium chloride accounting for 20-30% of the total weight of the alkali liquor, and stirring for 10-20min to obtain the blasting pretreatment liquid.
Preferably, the preparation method of the grafting reactant is as follows: and (2) feeding the bentonite into a lanthanum chloride solution for reaction for 10-20min at the reaction speed of 150-250r/min, then carrying out ultrasonic dispersion on the bentonite and a silane coupling agent KH560 for 20-30min, and after the dispersion is finished, washing and drying to obtain the grafting reactant.
Preferably, the graphene emulsion is prepared from graphene, acrylic emulsion and divinylbenzene according to a weight ratio of (11-15): (7-9): 0.2.
Preferably, the graphene emulsion is graphene, acrylic emulsion and divinylbenzene according to a weight ratio of 13:8: 0.2.
Preferably, the preparation method of the active dispersant comprises the following steps: adding silicon dioxide into deionized water, firstly carrying out ultrasonic dispersion for 10-20min at the ultrasonic power of 200-500W, then adding a sodium silicate solution accounting for 20-30% of the total amount of the silicon dioxide, and continuously stirring for 20-30min to obtain the active dispersing agent.
Preferably, the preparation method of the zeolite-based composite weather resistant agent comprises the following steps: firstly, adding sodium sulfate into zeolite, and then adding the zeolite into a magnetic stirrer for later use; and then grinding the carbon nano tube, sieving the carbon nano tube by using a sieve with 500 meshes at 300-.
A method for preparing a PVB membrane with good weather resistance comprises the following steps: sequentially adding the modified grafted PVB resin, the graphene emulsion, the zeolite-based composite weather-resistant agent, the active dispersing agent and the dibutyl sebacate toughening agent into a high-speed stirrer for stirring at the stirring speed of 800-1200r/min for 20-30min, plasticizing at the temperature of 140-170 ℃ by a double-screw extruder, and forming a film by a mold to obtain the PVB film.
Compared with the prior art, the invention has the following beneficial effects:
in the grafting modification of the PVB resin, the PVB resin is soaked by a sodium carbonate solution, so that the surface structure of the PVB resin is sparse and is easier to be modified by cobalt 60-gamma ray irradiation, the surface activity of the irradiated PVB resin is obviously improved, meanwhile, the microscopic surface structure is further damaged, and further, after the PVB resin is blasted with the blasting pretreatment liquid, the internal structure of the PVB resin is easier to be penetrated and impregnated by external substances;
sodium chloride is also added into the blasting pretreatment liquid, so that the medium environment provides a salt effect, the PVB resin is salted in blasting, and the corrosion resistance of the resin is enhanced; the grafting reaction agent adopts bentonite to be treated in a rare earth medium to enhance the activity of the grafting reaction agent, the bentonite has perfect organic and inorganic performances after being treated by a coupling agent, and simultaneously has a lamellar structure, and can play a holding function between lamellar layers and be grafted and introduced onto PVB resin, so that the bonding force among the PVB resin, inorganic raw materials and organic raw materials can be obviously enhanced, and the weather resistance of the product is integrally improved;
the graphene emulsion is graphene, acrylic emulsion and divinylbenzene, and the graphene, the acrylic emulsion and PVB resin are further crosslinked with the aid of a divinylbenzene crosslinking agent, so that the stability of the product is improved, and the weather-resistant effect of the product is further improved; the active dispersing agent is composed of silicon dioxide and sodium silicate, the silicon dioxide has strong activity and high specific surface area, and the sodium silicate is stable, so that the silicon dioxide can disperse the raw materials, the dispersion durability is kept, and the dispersion efficiency of the active dispersing agent is improved;
the zeolite-based composite weather-resistant agent adopts zeolite as a matrix, the zeolite has a large amount of microporous structures, the modified carbon nano tubes can be loaded in micro-voids after acidification, meanwhile, the carbon nano tubes have high surface area, the modified nano titanium dioxide can be loaded on the surface of the carbon nano tubes, and the modified carbon nano tubes are further compounded with the zeolite to enhance the adhesion and dispersion points of the nano titanium dioxide, so that the weather resistance of the product is improved;
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to specific embodiments, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1.
The PVB membrane with good weather resistance comprises the following raw materials in parts by weight:
55 parts of modified grafted PVB resin, 15 parts of graphene emulsion, 10 parts of zeolite-based composite weather-resistant agent, 2 parts of active dispersant and 1 part of dibutyl sebacate toughening agent;
the preparation method of the modified grafted PVB resin comprises the following steps:
s1, PVB resin surface treatment: putting PVB resin into a sodium carbonate solution with the mass fraction of 2% to be soaked for 10min at the soaking temperature of 45 ℃, taking out and drying the PVB resin, then adopting cobalt 60-gamma ray to perform irradiation treatment for 20min at the irradiation power of 150W, and finishing the irradiation;
s2, steam explosion treatment: feeding PVB resin into the blasting pretreatment liquid, then carrying out microwave treatment for 10min with the treatment power of 20W, finishing the treatment, then feeding the PVB resin into a steam blasting machine for blasting treatment with the blasting pressure of 1MPa, and finally washing and drying the PVB resin;
s3, grafting pretreatment: stirring and mixing the PVB resin subjected to steam explosion and 10% of vinyl trimethoxy silane at a high speed, wherein the mixing speed is 1000r/min, and the mixing time is 20 min;
s4, preparation of modified grafted PVB resin: and (3) feeding the PVB resin subjected to grafting pretreatment of S3 and a grafting reactant into a reaction kettle together, reacting for 15min at the reaction temperature of 125 ℃ and the reaction speed of 300r/min, finishing the reaction, and finally washing and drying.
The PVB membrane with good weather resistance comprises the following raw materials in parts by weight:
60 parts of modified grafted PVB resin, 20 parts of graphene emulsion, 15 parts of zeolite-based composite weather-resistant agent, 5 parts of active dispersant and 3 parts of dibutyl sebacate toughening agent.
The preparation method of the blasting pretreatment liquid in this embodiment is as follows: preparing sodium hydroxide and deionized water into alkali liquor according to the weight ratio of 1:50, then feeding the alkali liquor into a reaction kettle, then adding sodium chloride accounting for 20-30% of the total weight of the alkali liquor, and stirring for 10min to obtain the blasting pretreatment liquid.
The preparation method of the grafting reactant of this example is: and (2) feeding bentonite into a lanthanum chloride solution for reaction for 10min at the reaction speed of 150r/min, then carrying out ultrasonic dispersion on the bentonite and a silane coupling agent KH560 for 20min, and after the dispersion is finished, washing and drying to obtain the grafting reaction agent.
The graphene emulsion of the embodiment is prepared from graphene, acrylic emulsion and divinylbenzene according to a weight ratio of 11:7: 0.2.
The preparation method of the active dispersant of the embodiment comprises the following steps: adding silicon dioxide into deionized water, firstly carrying out ultrasonic dispersion for 10min with the ultrasonic power of 200W, then adding a sodium silicate solution accounting for 20% of the total amount of the silicon dioxide, and continuously stirring for 20min to obtain the active dispersing agent.
The preparation method of the zeolite-based composite weather resistant agent of the embodiment comprises the following steps: firstly, adding sodium sulfate into zeolite, and then adding the zeolite into a magnetic stirrer for later use; and then grinding the carbon nano tube, sieving the carbon nano tube by using a 300-mesh sieve, mixing the carbon nano tube, the nano titanium dioxide and the acetone according to the weight ratio of 1:2:5, feeding the mixture into a reaction kettle for reaction for 10min, wherein the reaction speed is 210r/min to obtain a modified carbon nano tube, adding the modified carbon nano tube into a magnetic stirrer, adding ethanol and ethylene glycol, increasing the stirring speed to 300r/min, and stirring for 15min to obtain the zeolite-based composite weather-resistant agent.
A method for preparing a PVB membrane with good weather resistance comprises the following steps: sequentially adding the modified grafted PVB resin, the graphene emulsion, the zeolite-based composite weather-resistant agent, the active dispersing agent and the dibutyl sebacate toughening agent into a high-speed stirrer for stirring at the stirring speed of 800r/min for 20min, plasticizing at the temperature of 140 ℃ by a double-screw extruder, and forming a film by a mold to obtain the PVB membrane.
Example 2.
The PVB membrane with good weather resistance comprises the following raw materials in parts by weight:
65 parts of modified grafted PVB resin, 25 parts of graphene emulsion, 20 parts of zeolite-based composite weather-resistant agent, 8 parts of active dispersant and 5 parts of dibutyl sebacate toughening agent;
the preparation method of the modified grafted PVB resin comprises the following steps:
s1, PVB resin surface treatment: putting PVB resin into a sodium carbonate solution with the mass fraction of 6% to be soaked for 20min at the soaking temperature of 55 ℃, taking out and drying the PVB resin, then adopting cobalt 60-gamma ray to perform irradiation treatment for 20-30min, wherein the irradiation power is 250W, and finishing the irradiation;
s2, steam explosion treatment: feeding PVB resin into the blasting pretreatment liquid, then carrying out microwave treatment for 20min with the treatment power of 50W, finishing the treatment, then feeding the PVB resin into a steam blasting machine for blasting treatment with the blasting pressure of 2MPa, and finally washing and drying the PVB resin;
s3, grafting pretreatment: stirring and mixing the PVB resin subjected to steam explosion and 20 mass percent of vinyl trimethoxy silane at a high speed, wherein the mixing speed is 1500r/min, and the mixing time is 30 min;
s4, preparation of modified grafted PVB resin: and (3) feeding the PVB resin subjected to grafting pretreatment of S3 and a grafting reactant into a reaction kettle together, reacting at the temperature of 135 ℃ for 25min at the reaction speed of 500r/min, finishing the reaction, and finally washing and drying.
The preparation method of the blasting pretreatment liquid in this embodiment is as follows: preparing sodium hydroxide and deionized water into alkali liquor according to the weight ratio of 1:50, then feeding the alkali liquor into a reaction kettle, then adding sodium chloride accounting for 30% of the total weight of the alkali liquor, and stirring for 20min to obtain the blasting pretreatment liquid.
The preparation method of the grafting reactant of this example is: and (3) feeding bentonite into a lanthanum chloride solution for reaction for 20min at the reaction speed of 250r/min, then carrying out ultrasonic dispersion on the bentonite and a silane coupling agent KH560 for 30min, and after the dispersion is finished, washing and drying to obtain the grafting reaction agent.
The graphene emulsion of the embodiment is prepared from graphene, acrylic emulsion and divinylbenzene according to a weight ratio of 15:9: 0.2.
The preparation method of the active dispersant of the embodiment comprises the following steps: adding silicon dioxide into deionized water, performing ultrasonic dispersion for 20min at the ultrasonic power of 500W, adding a sodium silicate solution accounting for 30% of the total amount of the silicon dioxide, and continuously stirring for 30min to obtain the active dispersing agent.
The preparation method of the zeolite-based composite weather resistant agent of the embodiment comprises the following steps: firstly, adding sodium sulfate into zeolite, and then adding the zeolite into a magnetic stirrer for later use; and then grinding the carbon nano tube, sieving the carbon nano tube by a 500-mesh sieve, mixing the carbon nano tube, the nano titanium dioxide and the acetone according to the weight ratio of 1:2:5, feeding the mixture into a reaction kettle for reaction for 20min, wherein the reaction speed is 250r/min to obtain a modified carbon nano tube, adding the modified carbon nano tube into a magnetic stirrer, adding ethanol and ethylene glycol, increasing the stirring speed to 500r/min, and stirring for 25min to obtain the zeolite-based composite weather-resistant agent.
A method for preparing a PVB membrane with good weather resistance comprises the following steps: sequentially adding the modified grafted PVB resin, the graphene emulsion, the zeolite-based composite weather-resistant agent, the active dispersing agent and the dibutyl sebacate toughening agent into a high-speed stirrer for stirring at the stirring speed of 1200r/min for 30min, plasticizing at the temperature of 170 ℃ by a double-screw extruder, and forming a film by a mold to obtain the PVB membrane.
Example 3.
The PVB membrane with good weather resistance comprises the following raw materials in parts by weight:
60 parts of modified grafted PVB resin, 20 parts of graphene emulsion, 15 parts of zeolite-based composite weather-resistant agent, 5 parts of active dispersant and 3 parts of dibutyl sebacate toughening agent;
the preparation method of the modified grafted PVB resin comprises the following steps:
s1, PVB resin surface treatment: putting PVB resin into a sodium carbonate solution with the mass fraction of 4% to be soaked for 15min at the soaking temperature of 50 ℃, taking out and drying, then adopting cobalt 60-gamma ray to perform irradiation treatment for 25min with the irradiation power of 200W, and finishing the irradiation;
s2, steam explosion treatment: feeding PVB resin into the blasting pretreatment liquid, then carrying out microwave treatment for 10-20min with the treatment power of 35W, finishing the treatment, then feeding the PVB resin into a steam blasting machine for blasting treatment with the blasting pressure of 1.5MPa, and finally washing and drying the PVB resin;
s3, grafting pretreatment: the PVB resin subjected to steam explosion and vinyl trimethoxy silane with the mass fraction of 15% are stirred and mixed at a high speed, the mixing speed is 1250r/min, and the mixing time is 25 min;
s4, preparation of modified grafted PVB resin: and (3) feeding the PVB resin subjected to grafting pretreatment of S3 and a grafting reactant into a reaction kettle together, reacting at the temperature of 130 ℃ for 20min at the reaction speed of 400r/min, finishing the reaction, and finally washing and drying.
The preparation method of the blasting pretreatment liquid in this embodiment is as follows: preparing sodium hydroxide and deionized water into alkali liquor according to the weight ratio of 1:50, then feeding the alkali liquor into a reaction kettle, then adding sodium chloride accounting for 25% of the total weight of the alkali liquor, and stirring for 15min to obtain the blasting pretreatment liquid.
The preparation method of the grafting reactant of this example is: and (3) feeding bentonite into a lanthanum chloride solution for reaction for 15min at the reaction speed of 200r/min, then carrying out ultrasonic dispersion on the bentonite and a silane coupling agent KH560 for 25min, and after the dispersion is finished, washing and drying to obtain the grafting reaction agent.
The graphene emulsion of the embodiment is prepared from graphene, acrylic emulsion and divinylbenzene according to a weight ratio of 13:8: 0.2.
The preparation method of the active dispersant of the embodiment comprises the following steps: adding silicon dioxide into deionized water, firstly carrying out ultrasonic dispersion for 15min, wherein the ultrasonic power is 350W, then adding a sodium silicate solution accounting for 25% of the total amount of the silicon dioxide, and continuously stirring for 25min to obtain the active dispersing agent.
The preparation method of the zeolite-based composite weather resistant agent of the embodiment comprises the following steps: firstly, adding sodium sulfate into zeolite, and then adding the zeolite into a magnetic stirrer for later use; and then grinding the carbon nano tube, sieving the carbon nano tube by a 400-mesh sieve, mixing the carbon nano tube with nano titanium dioxide and acetone according to the weight ratio of 1:2:5, feeding the mixture into a reaction kettle for reaction for 15min, wherein the reaction speed is 230r/min to obtain a modified carbon nano tube, adding the modified carbon nano tube into a magnetic stirrer, adding ethanol and ethylene glycol, increasing the stirring speed to 400r/min, and stirring for 20min to obtain the zeolite-based composite weather-resistant agent.
A method for preparing a PVB membrane with good weather resistance comprises the following steps: and sequentially adding the modified grafted PVB resin, the graphene emulsion, the zeolite-based composite weather-resistant agent, the active dispersing agent and the dibutyl sebacate toughening agent into a high-speed stirrer for stirring at the stirring speed of 1000r/min for 25min, plasticizing at the temperature of 155 ℃ by using a double-screw extruder, and forming a film by using a die to obtain the PVB membrane.
Comparative example 1.
A PVB film on the market is adopted.
The products of example 1, example 2, example 3 and comparative example 1 were soaked in water at room temperature for 80 hours, and then observed for phenomena, and then placed at a temperature of 88 ℃ for 55 hours, respectively. And irradiating with ultraviolet lamp of 280nm for 8 hr, wherein the distance between the ultraviolet lamp and the membrane is 0.5m as follows.
As can be seen from examples 1 to 3 and comparative example 1, the products of the present invention have excellent weather resistance.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (9)
1. A PVB membrane with good weather resistance is characterized by comprising the following raw materials in parts by weight:
55-65 parts of modified grafted PVB resin, 15-25 parts of graphene emulsion, 10-20 parts of zeolite-based composite weather-resistant agent, 2-8 parts of active dispersant and 1-5 parts of dibutyl sebacate toughening agent;
the preparation method of the modified grafted PVB resin comprises the following steps:
s1, PVB resin surface treatment: the PVB resin is firstly sent into a sodium carbonate solution with the mass fraction of 2-6% to be soaked for 10-20min, the soaking temperature is 45-55 ℃, then the PVB resin is taken out and dried, then the PVB resin is irradiated by cobalt 60-gamma rays for 20-30min, the irradiation power is 150-250W, and the PVB resin is obtained after the irradiation is finished;
s2, steam explosion treatment: feeding PVB resin into the blasting pretreatment liquid, then carrying out microwave treatment for 10-20min with the treatment power of 20-50W, finishing the treatment, then feeding the PVB resin into a steam blasting machine for blasting treatment with the blasting pressure of 1-2MPa, and finally washing and drying the PVB resin;
s3, grafting pretreatment: the PVB resin subjected to steam explosion and 10-20% of vinyl trimethoxy silane are stirred and mixed at a high speed, the mixing speed is 1000-1500r/min, and the mixing time is 20-30 min;
s4, preparation of modified grafted PVB resin: and (3) feeding the PVB resin subjected to grafting pretreatment of S3 and a grafting reactant into a reaction kettle together, reacting at the temperature of 125-135 ℃ for 15-25min at the reaction speed of 300-500r/min, finishing the reaction, and finally washing and drying.
2. The PVB film with good weather resistance of claim 1, which comprises the following raw materials in parts by weight:
60 parts of modified grafted PVB resin, 20 parts of graphene emulsion, 15 parts of zeolite-based composite weather-resistant agent, 5 parts of active dispersant and 3 parts of dibutyl sebacate toughening agent.
3. The PVB film with good weather resistance of claim 1, wherein the blasting pretreatment liquid is prepared by the following steps: preparing sodium hydroxide and deionized water into alkali liquor according to the weight ratio of 1:50, then feeding the alkali liquor into a reaction kettle, then adding sodium chloride accounting for 20-30% of the total weight of the alkali liquor, and stirring for 10-20min to obtain the blasting pretreatment liquid.
4. The PVB film sheet according to claim 1, wherein the grafting reagent is prepared by a method comprising: and (2) feeding the bentonite into a lanthanum chloride solution for reaction for 10-20min at the reaction speed of 150-250r/min, then carrying out ultrasonic dispersion on the bentonite and a silane coupling agent KH560 for 20-30min, and after the dispersion is finished, washing and drying to obtain the grafting reactant.
5. The PVB film with good weather resistance of claim 1, wherein the graphene emulsion is graphene, acrylic emulsion and divinylbenzene in a weight ratio of (11-15): (7-9): 0.2.
6. The PVB film with good weather resistance of claim 5, wherein the graphene emulsion is graphene, acrylic emulsion and divinylbenzene in a weight ratio of 13:8: 0.2.
7. The PVB film sheet of claim 1, wherein the reactive dispersant is prepared by: adding silicon dioxide into deionized water, firstly carrying out ultrasonic dispersion for 10-20min at the ultrasonic power of 200-500W, then adding a sodium silicate solution accounting for 20-30% of the total amount of the silicon dioxide, and continuously stirring for 20-30min to obtain the active dispersing agent.
8. The PVB membrane with good weather resistance of claim 1, wherein the preparation method of the zeolite-based composite weather-resistant agent comprises the following steps: firstly, adding the zeolite into a magnetic stirrer for later use by adopting sodium sulfate; and then grinding the carbon nano tube, sieving the carbon nano tube by using a sieve with 500 meshes at 300-.
9. A process for preparing a PVB film having good weatherability as defined in any of claims 1-8, comprising the steps of: sequentially adding the modified grafted PVB resin, the graphene emulsion, the zeolite-based composite weather-resistant agent, the active dispersing agent and the dibutyl sebacate toughening agent into a high-speed stirrer for stirring at the stirring speed of 800-1200r/min for 20-30min, plasticizing at the temperature of 140-170 ℃ by a double-screw extruder, and forming a film by a mold to obtain the PVB film with good weather resistance.
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