(19)

(11)

EP 2 807 198 A1

(12)

(43) Date of publication: 03.12.2014 Bulletin 2014/49 (21) Application number: 12790945.5 (22) Date of filing: 13.11.2012

(51) International Patent Classification (IPC):  C08F 226/02(2006.01) G02B 1/04(2006.01) C08F 230/08(2006.01) (86) International application number: PCT/GB2012/052812 (87) International publication number: WO 2013/110911 (01.08.2013 Gazette 2013/31)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR (30) Priority: 27.01.2012 US 201213360568 (71) Applicant: Contamac Limited Saffron Walden, Essex CB11 4JX (GB)	(72) Inventors: HIGGS, Timothy Saffron Walden Essex CB11 4JX (GB) TAPPER, Tristan Saffron Walden Essex CB11 4JX (GB) YOUNG, Richard Saffron Walden Essex CB11 4JX (GB) (74) Representative: Wills, Andrew Jonathan et al Mewburn Ellis LLP 33 Gutter Lane London EC2V 8AS London EC2V 8AS (GB)