Title:
PROTECTING AND CORROSION PREVENTING METHOD FOR STEEL PRODUCT AND STEEL PIPE
Document Type and Number:
Japanese Patent JP3105088
Kind Code:
B2
Abstract:
PURPOSE: To protect iron products and steel pipes and to prevent corrosion of these by applying a two-liquid epoxy urethane primer containing excess OH groups on the treated surface of iron products and steel pipes after pretreatment and then spraying a rapid-curing urethane coating material of specified compsn. with a 2-liquid high pressure spray machine.
CONSTITUTION: A two-liquid epoxy urethane primer having 0.6-0.9 equiv. ratio of NCO/OH of polyisocyanate and epoxypolyol is applied on the treated surface of iron products and steel pipes after surface treatment. Then, partial prepolymers are prepared by 100 pts.wt. by the reaction of diphenylmethane diisocyanate mixture and an active hydrogen-contg. compd. Also a mixture of an active hydrogen-contg. compd. having <170mg KOH/g hydroxyl value or amine value and an active aromatic polyamine is prepared to have 60/40 to 100/0 amino group/hydroxyl group equiv. ratio and an org. metal catalyst is added by 0.1-6 pts.wt. to this mixture to obtain 100 pts.wt. in total. Tar or non-silicone defoaming agent is compounded in one of these components, and these components are applied on the product body with using a 2-component high pressure spray machine.
Inventors:
Sakaguchi Hirohide
Kazuo Taniguchi
Satoshi Ogura
Yoshio Kikuta
Takao Isao
Yukio Tanaka
Kazuo Taniguchi
Satoshi Ogura
Yoshio Kikuta
Takao Isao
Yukio Tanaka
Application Number:
JP23688992A
Publication Date:
October 30, 2000
Filing Date:
September 04, 1992
Export Citation:
Assignee:
Mitsui Chemicals, Inc.
Kawakami Paint Co., Ltd.
Kawakami Paint Co., Ltd.
International Classes:
B05D1/36; B05D7/14; B05D7/24; C09D5/00; C09D175/00; C09D175/04; (IPC1-7): B05D7/24; B05D1/36; B05D7/14; C09D5/00; C09D175/04
Domestic Patent References:
| JP63242381A | ||||
| JP3110565A |
Attorney, Agent or Firm:
Shotaro Mogami