Valve seal and device for dispensing a fluid product while being provided with a seal of this type

Abstract

The invention relates to a valve seal for an aerosol dispenser serving to dispense a fluid product. The invention is characterized in that said seal contains an elastomer based on ethylene propylene (EP) and/or or on ethylene propylene diene (EPDM), and contains a mineral filler based on quartz (SiO 2 ) and on kaolinite (Al 4 [( 0 H) 8 Si 4 O 10 ]).

1 . A valve seal intended for a fluid product aerosol dispenser, characterised in that the said seal includes an elastomer based upon ethylene propylene (EP) and/or ethylene propylene diene monomer (EPDM), and a mineral filler based upon quartz (SiO 2 ) and Kaolinite (Al 4 [(OH) 8 Si4O 10 ]).  
   
   
       2 . A seal according to  claim 1 , in which the mineralogical composition of the mineral filler includes between 65% and 95%, preferably 80%, of quartz, and between 5% and 35%, preferably about 20%, of Kaolinite.  
   
   
       3 . A seal according to  claim 1 , in which the chemical composition of the mineral filler includes between 3% and 15%, preferably about 8%, of Al 2 O 3 , and between 75% and 95%, preferably about 87%, of SiO 2 .  
   
   
       4 . A seal according to  claim 1 , in which the mineral filler has a pH greater than 6, preferably between about 7 and 8.  
   
   
       5 . A seal according to  claim 1 , in which the mineral filler has an average particle size of between 1.5 and 4 microns, preferably about 2.2 microns.  
   
   
       6 . A seal according to  claim 1 , in which the said seal, before its assembly into a fluid product aerosol dispenser, is subjected to a surface chlorination treatment.  
   
   
       7 . A seal according to  claim 6 , in which the said seal is immersed in a solution containing water, hydrochloric acid and bleach.  
   
   
       8 . A measuring-out valve for a fluid product aerosol dispenser, characterised in that it includes at least a valve seal according to  claim 1 .  
   
   
       9 . A dispenser for dispensing a fluid product, that includes a reservoir containing a fluid product and a propellant gas, and a valve, preferably a measuring-out valve, mounted on the said reservoir, characterised in that the said valve includes at least a valve seal according to  claim 1 .  
   
   
       10 . A dispenser according to  claim 9 , in which the said valve includes a valve element sliding in a valve body with the interposition of the valve seal.  
   
   
       11 . A dispenser according to  claim 9 , in which the said propellant gas includes HFC-134a gas and/or HFC-227 gas.  
   
   
       12 . A dispenser according to  claim 9 , in which the reservoir also contains alcohol, and ethanol in particular.  
   
   
       13 . A manufacturing process for a valve seal intended for a fluid product aerosol dispenser, characterised in that the process includes the following stages: 
 creation of a seal that includes an elastomer based upon ethylene propylene (EP) and/or ethylene propylene diene monomer (EPDM), and a mineral filler based upon quartz (SiO 2 ) and kaolinite (Al 4 [(OH) 8 Si 4 O 10 )];    submission of this seal to a surface chlorination treatment.    
   
   
       14 . A process according to  claim 13 , in which the said surface chlorination treatment includes immersing the seal in a solution containing water, hydrochloric acid and bleach.