US 12,466,636 B2
Pressurised dispensing container
Paul Allsop, King's Lynn (GB); Jaysukhlal Mohanlal Bhogaita, King's Lynn (GB); and Andrew Ian Sapsford, King's Lynn (GB)
Assigned to Bespak Europe Limited, King's Lynn (GB)
Appl. No. 17/797,417
Filed by Bespak Europe Limited, King's Lynn (GB)
PCT Filed Jan. 26, 2021, PCT No. PCT/GB2021/050175
§ 371(c)(1), (2) Date Aug. 3, 2022,
PCT Pub. No. WO2021/156602, PCT Pub. Date Aug. 12, 2021.
Claims priority of application No. 2001537 (GB), filed on Feb. 5, 2020; and application No. 2020387 (GB), filed on Dec. 22, 2020.
Prior Publication US 2023/0082549 A1, Mar. 16, 2023
Int. Cl. B65D 83/52 (2025.01); A61M 15/00 (2006.01); B65D 83/141 (2025.01); C09K 3/10 (2006.01); C09K 3/30 (2006.01)
CPC B65D 83/52 (2013.01) [B65D 83/141 (2025.01); C09K 3/1006 (2013.01); C09K 3/30 (2013.01); A61M 15/009 (2013.01); C09K 2003/1053 (2013.01); C09K 2200/0642 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A pressurised dispensing container comprising a container for product to be dispensed, and a valve fixed to the container, wherein the container contains a propellant comprising 1,1-difluoroethane or a derivative thereof and optionally ethanol,
wherein the valve comprises a valve stem, a valve body and one or more seals, the valve stem being slidable within the valve body, the one or more seals co-operating with the valve stem for regulating discharge of a fluid,
wherein the valve further comprises a sealing gasket for sealing the valve to the dispensing container,
wherein the one or more seals is/are formed from (i) an elastomeric composition comprising an ethylene-propylene-diene terpolymer, wherein the ethylene-propylene-diene terpolymer comprises from 40 to 70 wt. % ethylene, from 30 to 50 wt. % propylene, and ENB (ethylidenenorbornene) in an amount of 0.5 to 9 wt. %, and wherein the terpolymer has a Mooney Viscosity (ML 1+4, 125° C.) of from 10 to 90, and
the sealing gasket is formed from (ii) an elastomeric composition comprising an isobutylene polymer or co-polymer thereof.