Reference

Scratch and abrasion resistant polymeric nanocomposites - preparation, characterization and applications

Scratch and abrasion resistant polymeric nanocomposites - preparation, characterization and applications. Stojanovic, S.; Bauer, F.; Glaesel, H.-J.; Mehnert, R. (Leibniz-Institut fuer Oberflaechenmodifizierung, Leipzig, Germany). Materials Science Forum, 453-454(Progress in Advanced Materials and Processes), 473-478 (English) 2004 Trans Tech Publications Ltd. CODEN: MSFOEP. ISSN: 0255-5476. DOCUMENT TYPE: Journal CA Section: 42 (Coatings, Inks, and Related Products) Section cross-reference(s): 37 Nanosized pyrogenic silica was used as a filler for UV/EB curable acrylates. In order to avoid highly viscous solns. due to incompatibility of the inorg. filler with the org. polymer, trialkoxysilanes were used as coupling agents. The acid catalyzed hydrolysis/condensation of trialkoxysilanes enabled favorable incorporation of silica into the acrylate matrix, thus resulting in the formation of acrylate-nanocomposite formulations with up to 35 wt. % of silica.There are some commonly used reagents with their cas registry numbers 51728-26-8 and 84434-11-7 in this article. In this way, surface-modified silica was proposed to have a ladder-like arrangement of linked siloxanes, which was demonstrated by means of multinuclear MAS NMR and MALDI-TOF mass spectroscopy. After UV or electron beam (EB) curing of such formulations, crosslinked polyacrylate nanocomposite coatings with improved properties, e.g. scratch, abrasion and heat resistance, are obtained. Therefore, the application of polymeric nanocomposite coatings is constantly increasing in the wood and plastics industry. .

Thermoplastic extrudate containing a UV-crosslinkable coating

All Rights Reserved. Thermoplastic extrudate containing a UV-crosslinkable coating. Steffl, Udo; Griebel, Dragan (Rehau AG & Co., Germany). Eur. Pat. Appl. EP 1743909 A1 17 Jan 2007, 10pp. DESIGNATED STATES: R: AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HU, IE, IS, IT, LI, LT, LU, LV, MC, NL, PL, PT, RO, SE, SI, SK, TR, AL, BA, HR, MK, YU. (German). (European Patent Organization). CODEN: EPXXDW. APPLICATION: EP 2006-14098 7 Jul 2006. PRIORITY: DE 2005-102005032618 13 Jul 2005. DOCUMENT TYPE: Patent CA Section: 38 (Plastics Fabrication and Uses) Section cross-reference(s): 42 Extruded thermoplastics with improves mech. properties, esp. with improved scratch-resistance comprise a polymeric substrate coated with a 8 - 40 mm protective layer having microhardness 3 200 N/mm2 (according ISO 14577) prepd. from an UV-crosslinkable compn. having viscosity 8 - 20 s (20°, according DIN ISO 2431) contg. 100 wt. parts polyacrylate (I), 0.1 - 80 wt. parts (based on I) SiO2 or Al2O3 or ZrO2 or CeO2, 0.1 - 100 wt. parts a reactive diluent such as polyol acrylates, 0. 84434-11-7 and 947-19-3 are cas registry numbers of chemicals which are used as reagents here.1 - 80 wt. parts vinylsilanes and 0.1 - 5 wt. parts photoinitiators such as 2-hydroxy-2-methyl-1-phenylpropanone-1 or Et 2,4,6-trimethylbenzoylphenylphosphate or 1-hydroxycyclohexyl Ph ketone. Thus, a compn. prepd. by mixing 100 wt. parts polyurethane-acrylate (Ebecryl EB 1290), 60 wt. parts amorphous silica having particle size 20 nm, 33 wt. parts 1,6-hexanediol diacrylate, 30 wt. parts a mixt. of oligomeric vinyltrimethoxysilanes and 2 wt. parts 1-hydroxycyclohexyl Ph ketone exhibits after crosslinking with UV-light of Hg-lamp viscosity 9 s and microhardness 258.2 N/mm2. .