Polyvinyl butyral transparent film and preparation method thereof

Abstract

The invention belongs to the field of polymer / nanoparticle composite materials, and relates to an infrared thermal reflection and anti-ultraviolet polyvinyl butyral (PVB) transparent film for laminated safety glass and a preparation method thereof. According to the method, nano-indium stannum oxide (ATO) is selected as functional particles, is subjected to double processing through a coupling agent and a dispersing agent and is poured into a mold to be formed and compounded after being directly and uniformly mixed with purchased or self-made polyvinyl butyral, plasticizer, antioxidant and filming agent by means of ultrasonic wave to prepare a heat-insulating PVB nano composite film. The nano-ATO particles are subjected to the double processing and the special ultrasonic dispersion process, so that the problem of agglomeration of the ATO is effectively improved; and the prepared PVB nano composite film has superior mechanical property and higher infrared reflectivity and visible light transmittance, and can be directly used for processing and producing heat-insulating, sound-insulating, anti-ultraviolet, transparent and impact-resistant multi-functional safety glass.

Description

technical field [0001] The invention belongs to the field of polymer / nanoparticle composite materials, and relates to an infrared heat-reflecting and anti-ultraviolet polyvinyl butyral (PVB) transparent adhesive film for laminated safety glass and a preparation method thereof, in particular to surface modification of nanoparticles properties and the preparation method of PVB nano-composite interlayer film, which is mainly used in industries such as building energy-saving, automobile energy-saving safety glass and other industries. Background technique [0002] Energy conservation and environmental protection have always been one of the hot spots in today's society. Modern buildings use large-area glass curtain walls and doors and windows. The good light transmission effect of glass beautifies the house landscape. Radiation is directly transmitted into the room, and the cold house in winter is not insulated, which increases the electricity load of the air conditioner and lead...

AI Technical Summary

Problems solved by technology

[0003] At present, most heat-insulating transparent glass is coated glass, and the outer surface of the glass is covered with a layer of heat-insulating polymer coating or film. Most of these heat-insulating materials are made of polymer Nanoparticles that are highly reflective to infrared rays are added to block infrared heat radiation. Although the thermal conductivity of nanoparticles is much larger than that of polymers, the reflected heat is greater than its own heat conduction, so it can also show excellent insulation. Thermal properties; as Chinese patent 200610096832.3 discloses a transparent heat-insulating film and a preparation method thereof, using nano-indium tin oxide (ITO) and nano-titanium dioxide and polymer resin (such as water-based polyurethane, epoxy resin or polyvinyl butyral ), coating additives, diluents and curing agents are blended, coated on a transparent film substrate and heated and cured to obtain a transparent heat-insulating film. The film has good light transmission performance, and the infrared shielding rate is over 60%. Almost 100%, but the ITO particles are rare and precious metals, resulting in higher production costs; Chinese patent CN1555989A discloses a car windshield with infrared reflection performance and its preparation method, using the magnetron sputtering method to oxidize the Materials are used as raw materials, and a semiconductor oxide film is deposited on one side of a polyvinyl butyral (PVB) film, which has good thermal insulation performance and a visible light transmittance of about 70%, but the process conditions are complicated to control and expensive; Chinese patent CN201110138776 .6 Announced a transparent glass heat-insulating coating, which is prepared by mixing acrylic resin, PVB, nano-antimony tin oxide (ATO), nano-TiO2, dispersant and solvent, although The added nano-TiO2 can effectively block ultraviolet rays, but has a certain impact on light transmission; Chinese patent CN101983983A discloses a polyvinyl butyral nanocomposite material that blocks solar heat rays and its The preparation method is to prepare nano-aluminum-doped zinc oxide (AZO) that reflects infrared rays and absorbs ultraviolet rays by the sol-gel method, and then blends it with PVB. Although the cost is reduced, the heat insulation effect is not very ideal; There are few reports on the nanocomposite interlayer film used for multifunctional laminated safety glass that is transparent to ultraviolet rays and has good impact resistance; such as Chinese patent CN200520063685.0 discloses a kind of heat-insulating safety glass, which reports two sheets The base material is made of laminated glass bonded by PVB film, one of which is coated heat insulating glass; Functional low-e film, and after surface treatment, a low-e film with good adhesion to PVB for laminated glass is obtained; this type of heat-insulating laminated glass combines the effects of coated glass and laminated glass, which is both Heat and sound insulation, transparent and safe and impact-resistant, but the preparation process is relatively long; Chinese patent CN102304261A discloses an insulation Heat-transparent polyvinyl butyral nanocomposite material and its preparation method, adding surface-modified nano-ITO particles in the synthesis stage of PVB resin, one-step in-situ dispersion method to prepare PVB / ITO transparent heat-insulating material, this method effectively The dispersion problem of nanoparticles is solved, and the light transmittance and infrared reflectivity of the film are excellent, and it can also be used directly as an interlayer adhesive film in heat-insulating safety glass. This process simplifies and shortens the production steps, and can significantly reduce costs. To reduce production costs, it is necessary to find alternatives to rare and precious metal ITO

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