Patent application number | Description | Published |
20090311547 | POLYVINYL ACETAL POWDER AND POWDER COATING MATERIAL USING THE SAME - The present invention provides a polyvinyl acetal powder which is excellent in flowability during the coating process when it is applied to a powder coating material. This polyvinyl acetal powder enables to obtain a coating film having good impact resistance and uniformity of thickness (uniformity of coating film thickness). The present invention also provides a powder coating material using the polyvinyl acetal powder. Specifically, the present invention is a polyvinyl acetal powder having an average particle diameter of 10 to 150 μm, a maximum particle diameter of 250 μm or less, and a melt flow rate of 1 to 200 g/10 min. as measured in accordance with JIS K7210: 1999. The present invention also is a powder coating material containing this polyvinyl acetal powder. | 12-17-2009 |
20100104866 | POLYVINYL BUTYRAL RESIN PELLET, AND METHOD FOR PRODUCING THE SAME - According to the present invention, a polyvinyl butyral resin pellet is provided that gives off little odor when produced and handled, as well as has a high apparent density and favorable handleability. The present invention includes a method for producing a polyvinyl butyral resin pellet including the steps of: melting polyvinyl butyral resin powder with a water content of 0.01 to 6 wt % by means of a melt extruder that has at least one vent portion for devolatilization equipped with vacuum means, and cutting the melt of the polyvinyl butyral resin after extrusion of it from the melt extruder. The present invention further includes a polyvinyl butyral resin pellet having a total content of butyl aldehyde and 2-ethyl-2-hexenal of 100 ppm or less. | 04-29-2010 |
20100143720 | CROSSLINKABLE POLYVINYL ACETAL POROUS POWDER, METHOD FOR PRODUCING THE SAME, AND USE OF THE SAME - Disclosed is a porous powder of a crosslinkable polyvinyl acetal which is capable of forming a cured product having excellent solvent resistance by light irradiation, electron beam irradiation or heat treatment, while being excellent in cleanability and solubility in solvents. Specifically disclosed is a crosslinkable polyvinyl acetal porous powder which contains a crosslinkable polyvinyl acetal containing a monomer unit to which a crosslinkable functional group is bonded through at least one bond selected from an ester bond, an ether bond and a urethane bond, wherein the crosslinkable functional group content is 0.3-20% by mole relative to the total of —CH | 06-10-2010 |
20100307585 | PHOTOVOLTAIC MODULES WITH FILMS CONTAINING PLASTICISERS HAVING LOW TENDENCY TO CREEP - The invention relates to the use of films containing plasticiser and based on polyvinyl acetal with a polyvinyl alcohol content in the polyvinyl acetal of less than 18% by weight and low creep tendency to produce photovoltaic modules. | 12-09-2010 |
20120202070 | POLYVINYL ACETAL COMPOSITION, LAMINATE, AND USE THEREOF - It is an object of the invention to provide a plasticized polyvinyl acetal composition that is suitably used for an intermediate film of a laminated glass and other applications, specifically, the polyvinyl acetal composition being characterized in that in cases when a layer that is composed of the polyvinyl acetal composition and another resin layer such as a resin layer of a polycarbonate, a poly(meth)acrylic acid ester, or a styrene thermoplastic elastomer are laminated, the plasticizer does not migrate from the polyvinyl acetal layer. The present invention relates to a polyvinyl acetal composition including 100 parts by mass of a polyvinyl acetal and 0.5 to 100 parts by mass of an ester plasticizer or ether plasticizer that is amorphous or has a melting point of 30° C. or less, and has a hydroxyl value of 15 to 450 mgKOH/g. | 08-09-2012 |
Patent application number | Description | Published |
20120204940 | POLYVINYL ACETAL LAMINATE AND USE THEREOF - It is an object of the present invention to provide a laminate of a layer that contains a polyvinyl acetal and a layer that contains a polyolefin (hydrocarbon polymer), which exhibits excellent adhesion between the layers. The present invention relates to a laminate obtained by laminating a layer A that includes a composition A containing a polyvinyl acetal and a layer B that includes a composition B containing a polyolefin and/or an adhesive functional group-containing olefinic polymer, wherein a mass ratio of (the polyolefin)/(the adhesive functional group-containing olefinic polymer) is 0/100 to 99.95/0.05. | 08-16-2012 |
20130074910 | POLYVINYL ACETAL FILM AND USES THEREOF - A polyvinyl acetal film as an intermediate film for a laminated glass, can provide a laminated glass that exhibits a low degree of yellowness and excellent surface appearance, and is useful as a sealing material or intermediate film that can prolong the life of a laminated glass provided with a solar cell or functional unit. The content of corrosion-causing substance in the polyvinyl acetal film is low, so that the polyvinyl acetal film permits high-temperature lamination and ensures excellent productivity. A solar cell module and a laminated glass are prepared using the polyvinyl acetal film. A plasticized polyvinyl acetal film which comprises 15 to 60 parts by mass of a plasticizer having a total number of 28 or more of carbon atoms and oxygen atoms constituting a molecule based on 100 parts by mass of a polyvinyl acetal resin, and which has an acid value of 5.0 meq/kg or less. | 03-28-2013 |
20150044472 | POLYVINYL BUTYRAL RESIN PELLET, AND METHOD FOR PRODUCING THE SAME - According to the present invention, a polyvinyl butyral resin pellet is provided that gives off little odor when produced and handled, as well as has a high apparent density and favorable handleability. The present invention includes a method for producing a polyvinyl butyral resin pellet including the steps of melting polyvinyl butyral resin powder with a water content of 0.01 to 6 wt % by means of a melt extruder that has at least one vent portion for devolatilization equipped with vacuum means, and cutting the melt of the polyvinyl butyral resin after extrusion of it from the melt extruder. The present invention further includes a polyvinyl butyral resin pellet having a total content of butyl aldehyde and 2-ethyl-2-hexenal of 100 ppm or less. | 02-12-2015 |