EP 1831297 A2 20070912 - USE OF SPECIFIC SILICAS FOR INCREASING THE RIGIDITY OF A THERMOPLASTIC WHILE MAINTAINING OR IMPROVING ITS IMPACT RESISTANCE
Title (en)
USE OF SPECIFIC SILICAS FOR INCREASING THE RIGIDITY OF A THERMOPLASTIC WHILE MAINTAINING OR IMPROVING ITS IMPACT RESISTANCE
Title (de)
VERWENDUNG VON SPEZIELLEN SILICIUMDIOXIDEN ZUR ERHÖHUNG DER STEIFIGKEIT EINES THERMOPLASTS UNTER BEIBEHALTUNG ODER VERBESSERUNG SEINER SCHLAGZÄHIGKEIT
Title (fr)
UTILISATION DE SILICES SPECIFIQUES POUR AUGMENTER LA RIGIDITE D'UN THERMOPLASTIQUE EN MAINTENANT OU AMELIORANT SA RESISTANCE AU CHOC
Publication
Application
Priority
- FR 2005003289 W 20051227
- FR 0414097 A 20041230
Abstract (en)
[origin: WO2006072704A2] The invention relates to the use of a silica having a BET specific surface of at least 60 m<SUP>2</SUP>/g for increasing the rigidity of a thermoplastic polymeric material while maintaining i.e. improving its impact resistance. The silica used is of the type obtained according to a method involving the drying of a silica suspension obtained by reacting a silicate with an acidulant according to the following successive steps: (i) forming an aqueous starter having a pH between 2 and 5; (ii) simultaneously adding silicate and the acidulant while keeping the pH between 2 and 5; (iii) continuing with only the addition of silicate until a pH between 7 and 10 has been reached; (iv) simultaneously adding silicate and acidulant while keeping the pH of the reaction medium between 7 and 10, and; (v) continuing with only the addition of the acidulant until a pH value lower than 6 has been obtained. The invention also relates to the materials obtained within this scope.
IPC 8 full level
C08K 3/36 (2006.01); C08J 3/20 (2006.01); C08L 23/12 (2006.01)
CPC (source: EP US)
C08K 3/36 (2013.01 - EP US); C08L 23/12 (2013.01 - EP US); Y10T 428/2982 (2015.01 - EP US)
Citation (search report)
See references of WO 2006072704A2
Designated contracting state (EPC)
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
DOCDB simple family (publication)
FR 2880351 A1 20060707; FR 2880351 B1 20070413; EP 1831297 A2 20070912; US 2009326139 A1 20091231; US 8334334 B2 20121218; WO 2006072704 A2 20060713; WO 2006072704 A3 20060928
DOCDB simple family (application)
FR 0414097 A 20041230; EP 05850622 A 20051227; FR 2005003289 W 20051227; US 79429505 A 20051227