23.
    发明专利
    未知

    公开(公告)号:BR9812598A

    公开(公告)日:2000-08-01

    申请号:BR9812598

    申请日:1998-09-29

    Applicant: HENKEL CORP

    Abstract: Processes for the preparation of polyphenol polymers useful as surface coatings wherein the process is carried out in the absence of organic solvents, and the polyphenol polymers are the reaction products of a phenolic polymer or copolymer, an amine, and an aldehyde, ketone, or mixture thereof; and the aqueous solutions resulting therefrom.

    Hydrophilicizing post-treatment over chromate conversion coating

    公开(公告)号:AU1127397A

    公开(公告)日:1997-07-03

    申请号:AU1127397

    申请日:1996-12-04

    Applicant: HENKEL CORP

    Abstract: PCT No. PCT/US96/19135 Sec. 371 Date Jun. 15, 1998 Sec. 102(e) Date Jun. 15, 1998 PCT Filed Dec. 4, 1996 PCT Pub. No. WO97/21780 PCT Pub. Date Jun. 19, 1997Substantially improved hydrophilicity can be provided to a metal substrate, particularly an aluminum alloy of the type used for heat exchanger fins, that has been previously provided with a conventional chromium oxide conversion coating, by drying into place on the surface of the chromium oxide conversion coating an aqueous liquid hydrophilicizing treatment composition containing at least one of: (i) aproduct or products of reaction between dissolved phosphoric acid and at least one of elemental metal, metal oxides, and metal hydroxides in contact therewith; (ii) tungstate ions; and (iii) at least one of sulfate or molybdate ions together with polyethyleneimine. Most preferably, a solution formed by dissolving MgO in aqueous H3PO4 in the proper stoichiometric amount to form an aqueous solution of Mg(H2PO4)2 with a pH of 4.5-5.5 is used for the hydrophilicizing treatment.

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