Part-I - Controller General of Patents Designs and Trademarks

(12) PATENT APPLICATION PUBLICATION (21) Application No.120/CHENP/2012 A
(19) INDIA
(22) Date of filing of Application :04/01/2012 (43) Publication Date : 21/06/2013
(54) Title of the invention : POWDER COATING COMPOSITIONS CAPABLE OF HAVING A SUBSTANTIALLY NON-
ZINC CONTAINING PRIMER•
( 1) International classification :C09D5/03
(31) Priority Document No :61/229,5 5
(32) Priority Date :29/07/2009
(33) Name of priority country :U.S.A.
(86) International Application No
Filing Date
(87) International Publication No : NA
(61) Patent of Addition to Application
:NA
Number
:NA
Filing Date
(62) Divisional to Application Number
Filing Date
:PCT/EP2010/060907
:27/07/2010
:NA
:NA
(71)Name of Applicant :
1)AKZO NOBEL COATINGS INTERNATIONAL B.V.
Address of Applicant :Velperweg 76 NL-6824 BM
Arnhem The NETHERLANDS
(72)Name of Inventor :
1)LUCAS Chad
(57) Abstract :
Corrosion and chip-resistant coatings for high tensile steel components such as automotive coil springs can be formed from a
coating composition comprising a primer having an epoxy resin with the proviso that the epoxy resin does not have an EEW of
about 860 to about 930 a polyhydroxyl functional phenolic curing agent having a HEW of about 200 to about 500 and a platy
filler. The primer contains less than 20 wt% zinc. The topcoat includes an epoxy resin having an epoxy equivalent weight of about
450 to about 1400 an elastomer-modified epoxy resin having an epoxy equivalent weight of about 1000 to about 1600 a foaming
agent and a reinforcing fiber.
No. of Pages : 25 No. of Claims : 20
The Patent Office Journal 21/06/2013 13718