Title Impact of aliphatic isocyanates to PVA dispersion gluing properties
Another Title Alifatinių izocianatų įtaka PVA dispersijos adhezinėms savybėms.
Authors Minelga, Darius ; Ukvalbergienė, Kristina ; Norvydas, Valdas ; Buika, Gintaras ; Dubininkas, Mindaugas
Full Text Download
Is Part of Materials science = Medžiagotyra.. Kaunas : Technologija. 2010, vol. 16, no. 3, p. 217-220.. ISSN 1392-1320. eISSN 2029-7289
Keywords [eng] PVA dispersion ; aliphatic isocyanates ; modification ; wood bonding
Abstract [eng] Poly(vinyl acetate) is used as adhesive for natural wood bonding. Modifying PVA dispersion it is possible to improve its bonding characteristics. The paper presents studies of polyvinyl acetate dispersion modified with water dispersible crosslinkers RHODOCOAT WAT, XWAT-3, XWAT-4, based on aliphatic isocyanates. In this research used isocyanates have positive property to emulgate in water; therefore it is very easy to add them into various polymers prepared on water basis. These polymers increase heat resistance and resistance to humidity while applying other adhesives. For the studies beech wood pieces of 12 % moisture content and 300 mm length, 150 mm width and 5 mm thickness respectively were chosen. Plastered with modified PVA dispersion samples were compressed in the hydraulic press “П-472B”, keeping them for 30 minutes and compressing with 0.8 MPa operating pressure. Three temperatures – 20, 60, 125 °C – were used for gluing. The glued pieces were cut into samples of b = 20 mm width and l1 = 150 mm length and tested in an universal tensile machine “P-0.5”. It was found that PVA modification with aliphatic isocyanates improves resistance to water of glued joints and are perspective for further research.
Published Kaunas : Technologija
Type Journal article
Language English
Publication date 2010
CC license CC license description