Title:
SURFACE PREPARATION AND POLYMERIC COATING OF CONTINUOUS-STRIP FLAT-ROLLED STEEL AND COATED PRODUCT
Document Type and Number:
WIPO Patent Application WO2004074533
Kind Code:
A3
Abstract:
Engineered composite coated flat-rolled steel strip is produced in continuous line operations, in which flat-rolled steel strip, free of surface iron oxide, having a metallic corrosion-protective coating, is polymer coated in continuous-line operations in which a plurality of adherent thin-film layers of polymeric material are deposited on a strip surface. In a dual-surface polymeric coating embodiment, each surface is separately-pretreated for surface adhesion, solidified, and polymeric overhang is removed. Finish processing re-melts the polymer coating and rapidly cools that coating through glass-transition temperature to establish amorphous characteristics in the polymeric coating materials. An anhydride-modified polypropylene, first contacts the strip, an intermediate layer can include about fifteen to twenty five percent, by weight, polybutylene with the balance polypropylene; an outer surface polymeric layer includes about five to ten percent, by weight, polybutylene with the balance polypropylene.
Inventors:
SINSEL JOHN A
LOEN MARK V
BAILEY MICHAEL S
LOEN MARK V
BAILEY MICHAEL S
Application Number:
PCT/US2004/004223
Publication Date:
May 06, 2005
Filing Date:
February 13, 2004
Export Citation:
Assignee:
ISG TECHNOLOGIES INC (US)
International Classes:
B05D1/26; B05D3/08; B05D7/14; B23B31/00; B29C48/05; B29C48/08; B29C48/91; B32B15/08; B32B37/15; B32B41/00; B05D3/14; B29C48/07; B29C48/154; B29C48/16; B29C48/21; B29C48/92; C23C; (IPC1-7): B23B31/00
Foreign References:
| US4941935A | 1990-07-17 | |||
| US5919517A | 1999-07-06 | |||
| US5942285A | 1999-08-24 | |||
| US5736086A | 1998-04-07 | |||
| US5976652A | 1999-11-02 | |||
| US5238517A | 1993-08-24 | |||
| US6773217B2 | 2004-08-10 |
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