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    IMPREGNATION AND PRIMER COATING OF ABSORPTIVE SUBSTRATES WITH TICS DISPERSIONS
    16.
    发明专利
    IMPREGNATION AND PRIMER COATING OF ABSORPTIVE SUBSTRATES WITH TICS DISPERSIONS 未知

    公开(公告)号：CA1053995A

    公开(公告)日：1979-05-08

    申请号：CA257183

    申请日：1976-07-16

    Applicant: HOECHST AG

    Inventor： MONDT JOSEF ,  RAUTERKUS KARL J ,  LEHMANN HEINZ ,  STELZEL WERNER ,  VITZTHUM HANS

    IPC: C04B41/63 ,  B05D7/00 ,  B28B11/04 ,  C04B41/00 ,  C09D5/00 ,  C09D5/02 ,  B32B13/12

    Abstract: IMPREGNATION AND PRIMER COATING OF ABSORPTIVE SUBSTRATES WITH PLASTICS DISPERSIONS of the disclosure: Absorptive substrates, such as asbestos cement, concrete plaster work, can be impregnated to lock the pores and to solidify the substrate, especially old and weathered plaster work , with aqueous plastics dispersions, if dispersions are used which have an average particle size of about 0.02 to at most 0.1.mu.m, and preferably from 0.02 to 0.06 .mu.m. As opposed to conventional dispersions with larger particle sizes, the penetration of dispersions according to the invention reaches the same values as that of the solvent-based impregnating and priming compositions hitherto used. Aqueous dispersions are easier to handle and permit relatively high solids contents at a moderate viscosity.

    VINYL ESTER DISPERSIONS
    17.
    发明专利
    VINYL ESTER DISPERSIONS 未知

    公开(公告)号：AU1664076A

    公开(公告)日：1978-02-09

    申请号：AU1664076

    申请日：1976-08-06

    Applicant: HOECHST AG

    Inventor： BRAUN HELMUT ,  RINNO HELMUT ,  STELZEL WERNER

    IPC: C08L31/02 ,  C08F2/00 ,  C08F2/22 ,  C08F2/24 ,  C08F18/00 ,  C08F18/02 ,  C08F218/00 ,  C08F218/02 ,  C08F218/04 ,  C09D131/02 ,  C09D131/04 ,  C09K23/52 ,  C09D5/02

    Abstract: An aqueous polymer dispersion which is suitable for the preparation of paints having high wet adhesion is prepared by copolymerisation in aqueous medium of vinyl esters of saturated monocarboxylic acids in the presence of an olefinically unsaturated acetoacetate. The vinyl ester employed is vinyl acetate, vinyl propionate, vinyl butyrate and/or vinyl isobutyrate together with vinyl esters of saturated monocarboxylic acids having 5 to 20 carbon atoms whose carboxyl group is bonded to a tertiary or quaternary carbon atom. The resultant dispersions are suitable for the preparation of gloss emulsion paints having high wet adhesion to non-sorptive substrates and have high resistance to hydrolysis.

    USE OF AQUEOUS CATIONIC DISPERSIONS OF SYNTHETIC RESINS FOR IMPREGNATING AND PRIMING OF ABSORBENT SUBSTRATES
    20.
    发明专利
    USE OF AQUEOUS CATIONIC DISPERSIONS OF SYNTHETIC RESINS FOR IMPREGNATING AND PRIMING OF ABSORBENT SUBSTRATES 未知

    公开(公告)号：CA1331439C

    公开(公告)日：1994-08-16

    申请号：CA563334

    申请日：1988-04-06

    Applicant: HOECHST AG

    Inventor： BISTER ERHARD ,  HUTH HANS-ULLRICH ,  STELZEL WERNER

    IPC: B05D7/00 ,  B05D7/24 ,  B27K3/15 ,  C04B41/48 ,  C08F2/00 ,  C09D5/00 ,  C09D123/04 ,  C09D125/00 ,  C09D127/06 ,  C09D133/14 ,  C09D135/00 ,  C09D139/06 ,  C09D143/02 ,  C04B41/63

    Abstract: Use of finely divided aqueous cationic dispersions of synthetic resins obtainable by emulsion polymerization from suitable monomers and which contain cationic dispersion polymers, as impregnants and primers for consolidating and priming or porous absorbent substrates, preferably inorganic substrates such as, for example, masonry, concrete, plaster surfaces, gypsum surfaces, bricks or wood by treating these substrates with the aqueous cationic dispersions whose polymer particles have mean particle diameters of 0.02 to 0.2 .mu.m. Aqueous cationic dispersions of synthetic resins exhibit a superior penetrating and permeating power, in particular on smooth plaster surfaces and smooth gypsum surfaces, compared with aqueous anionic or nonionic dispersions of synthetic resins. Moreover they have no tendency to foam formation and can, in contrast to aqueous anionic or non-ionic dispersions of synthetic resins, exhibit a sealing action against staining, water-soluble substances, such as tarry products (tobacco smoke), resins, wood constituents (tannins) and dyes, which is of particular advantage for example in the building trade in the renovation of old buildings.

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