EP 0288457 A4 19880823 - METHOD FOR INJECTION MOLDING WITH IMPROVED MOLD PRIMER.
Title (en)
METHOD FOR INJECTION MOLDING WITH IMPROVED MOLD PRIMER.
Title (de)
SPRITZGIESSVERFAHREN MIT VERBESSERTER FORMGRUNDIERUNG.
Title (fr)
PROCEDE DE MOULAGE PAR INJECTION ET COUCHE D'APPRET AMELIOREE UTILISEE A L'INTERIEUR DU MOULE.
Publication
Application
Priority
US 8601581 W 19860804
Abstract (en)
[origin: WO8800876A1] An in-mold primer which contains a preferentially adhesive resin also serves simultaneously as a mold release agent, and results in RIM (reaction injection molding) plastic articles whose surfaces virtually mirror the mold surface. Such a primer leaves no appreciable residue whatsoever on the mold surface during a production run of a large number of articles, obviating the previously encountered need to clean the mold each time a conventional mold release agent was introduced, each time an article was molded. The preferred resin in the primer is a hydroxylated vinyl chloride-vinyl acetate copolymer (VAGH resin).
IPC 1-7
IPC 8 full level
B29C 39/12 (2006.01); B29C 33/58 (2006.01); B29C 33/62 (2006.01); B29C 37/00 (2006.01); B29C 45/00 (2006.01); B29C 45/37 (2006.01); B29C 67/24 (2006.01)
CPC (source: EP)
B29C 33/62 (2013.01); B29C 37/0032 (2013.01); B29C 67/246 (2013.01)
Citation (search report)
- [X] DE 2154756 A1 19720531 - PROGIL BAYER UGINE
- [A] GB 2068819 A 19810819 - EXXON RESEARCH ENGINEERING CO
- See references of WO 8800876A1
Designated contracting state (EPC)
DE FR GB IT SE
DOCDB simple family (publication)
WO 8800876 A1 19880211; EP 0288457 A1 19881102; EP 0288457 A4 19880823; JP H01500984 A 19890406
DOCDB simple family (application)
US 8601581 W 19860804; EP 86905055 A 19860804; JP 50442486 A 19860804