Specifications

The Patent Office Journal 17/12/2010
4577
(12) PATENT APPLICATION PUBLICATION (21) Application No.3965/CHENP/2010 A
(19) INDIA
(22) Date of filing of Application :25/06/2010 (43) Publication Date : 17/12/2010
(54) Title of the invention : FLAME-RETARDANT EXPANDABLE STYRENE RESIN PARTICLE AND METHOD FOR
PRODUCTION THEREOF
(51) International classification :C08J9/16
(31) Priority Document No :2007-339903
(32) Priority Date :28/12/2007
(33) Name of priority country :Japan
(86) International Application No
Filing Date
:PCT/JP08/073093
:18/12/2008
(87) International Publication No
:WO 2009/084456
A1
(61) Patent of Addition to Application Number
Filing Date
:NA
:NA
(62) Divisional to Application Number
Filing Date
:NA
:NA
(71)Name of Applicant :
1)SEKISUI PLASTICS CO., LTD
Address of Applicant :4-4 NISHI-TENMA 2-CHOME, KITA-
KU, OSAKA-SHI, OSAKA 530-0047. Japan
(72)Name of Inventor :
1)TAKANO, MASAYUKI
2)OZAKI, YOSHINORI
3)YAMADA, KAZUMI
(57) Abstract :
A method for producing a flame-retardant expandable styrene based resin particle, the method comprising: adding, in suspension
polymerization of a styrenic monomer to obtain a styrene based resin particle, 0.45 parts by weight to 2.0 parts by weight of
tetrabromocyclooctane with respect to 100 parts by weight of the styrenic monomer; and then impregnating the styrene based resin
particle with a physical blowing agent while adjusting an impregnation temperature to 80°C to 110°C during or after the suspension
polymerization of the styrenic monomer to obtain the flame-retardant expandable styrene based resin particle.
No. of Pages : 36 No. of Claims : 8