81.
    发明专利
    未知

    公开(公告)号:DE10002089A1

    公开(公告)日:2001-07-26

    申请号:DE10002089

    申请日:2000-01-19

    Applicant: BASF AG

    Abstract: A water dispersible, radiation curable polyurethane comprises organic aliphatic or alicyclic polyisocyanates, cycloaliphatic diols and/or cycloaliphatic diamines, compounds having at least one isocyanate reactive group and at least one radically polymerizable unsaturated group and compounds having at least one isocyanate reactive group and at least one dispersion aiding group. A water dispersible, radiation curable polyurethane (I) comprises: (A) organic aliphatic or alicyclic polyisocyanates; (B) cycloaliphatic diols and/or cycloaliphatic diamines; (C) compounds having at least one isocyanate reactive group and at least one radically polymerizable unsaturated group; (D) compounds having at least one isocyanate reactive group and at least one dispersion aiding group; (E) optionally compounds having at least two isocyanate reactive groups having a mol. wt. of less than 1000 g/mol; (F) optionally compounds having at least one isocyanate reactive group that are different to (A)-(D). Independent claims are included for: (i) a polyurethane dispersion (II) comprising the polyurethane (I) and optionally 0-10 wt.% of a photochemical and/or thermal initiator and 0-10 wt.% of a UV absorber and a HALS compound; (ii) a process for the coating of substrates by application of the polyurethane dispersion (II), optionally containing conventional paint additives, onto a substrate and curing by means of electron irradiation or UV light under oxygen, or preferably under inert gas; (iii) the resulting coated substrate.

    Dual-cure aqueous polyurethane dispersion, useful e.g. for painting cars, based on aliphatic polyisocyanate, hydroxyalkyl acrylate, aliphatic diol, hydroxy- or mercapto-acid, basic compound and blocking agent

    公开(公告)号:DE19947054A1

    公开(公告)日:2001-04-05

    申请号:DE19947054

    申请日:1999-09-30

    Applicant: BASF AG

    Abstract: UV- and heat-curable aqueous polyurethane dispersion based on aliphatic polyisocyanates and low-mol. wt. aliphatic compounds with at least 2 hydroxyl, mercapto or amino groups also contains compounds with NCO-reactive groups and UV-polymerizable double bonds, carboxylic or sulfonic acids with NCO-reactive groups and an isocyanate blocking agent. UV- and heat-curable aqueous polyurethane dispersions (PD), essentially comprising: (a) aliphatic polyisocyanates with an NCO functionality of 2-4.5, (b) compounds with isocyanate-reactive group(s) and C=C double bond(s) which can be polymerized with UV in presence of a photoinitiator, (c) aliphatic compounds with a mol. wt. of less than 500 and at least 2 isocyanate-reactive hydroxyl, mercapto or prim. and/or sec. amino groups, (d) compounds with isocyanate-reactive group(s) and carboxylic or sulfonic acid group(s), (e) a basic compound for at least partial neutralization of the acid groups in (d), (f) an isocyanate blocking agent (f1) with a deblocking temperature of 70-160 deg C or an added low-mol. wt. compound (f2) with blocked isocyanate groups, and (g) optionally compounds other than (b-f) with only one isocyanate-reactive group. Dispersions (PD) are obtained by reacting (a) with (b) and (c) using a stoichiometric excess of NCO groups over OH groups and with sufficient (d) and (e) for good dispersibility in aqueous media, and then introducing blocked isocyanate groups by reaction with (f1) or by addition of (f2) containing (b) as additive.

    84.
    发明专利
    未知

    公开(公告)号:AT199243T

    公开(公告)日:2001-03-15

    申请号:AT96118091

    申请日:1996-11-12

    Applicant: BASF AG

    Abstract: A process for the production of (meth)acrylate esters (I) by esterification of (meth)acrylic acid (II) with mono- or poly- hydric alcohols (III) is claimed. The reaction mixture, still containing (II) in amounts equivalent to an acid number of at least 5 mg KOH/g, is treated with amino compound(s) (IV) containing at least one prim., sec. or tert. amino group. Also claimed are: (1) esters (I) obtained by this process; and (2) radiation-curable materials (RCM) containing (I).

    85.
    发明专利
    未知

    公开(公告)号:DE19940313A1

    公开(公告)日:2001-03-01

    申请号:DE19940313

    申请日:1999-08-25

    Applicant: BASF AG

    Abstract: The invention relates to a method for producing scratch resistant coatings. A UV hardenable coating agent contains at least one aliphatic urethane(meth)acrylate prepolymer PU with at least two double bonds per molecule or a mixture of at least one urethane(meth)acrylate prepolymer PU and at least one reactive diluent, said contents being the photochemically cross-linkable component. At least one of said coating agents is applied to the substrate to be coated. The humid coating thus obtained is hardened in an inert gas atmosphere under the influence of ultraviolet radiation.

    87.
    发明专利
    未知

    公开(公告)号:DE19851139A1

    公开(公告)日:2000-05-11

    申请号:DE19851139

    申请日:1998-11-05

    Applicant: BASF AG

    Abstract: A crosslinking reaction is initiated in a reactive paint formulation. This is coated-onto a surface at least locally, before reaction is completed. Independent claims are included for equipment carrying out the process, and for the coating so produced. The equipment employs a sprayer and/or electrostatic applicator with bell housing. Preferred features: Initiation of reaction preferably employs UV illumination (1), in conjunction with at least one photoinitiator in the formulation. Kinetics of the reaction are controlled by temperature variation, and/or by use of a sufficiently slowly-running reaction, especially a cationic polymerization, and/or by spatial separation of photoinitiator(s) from the formulation components and/or by minimizing reactivity of the photoinitiator(s). Spatial separation cited, is by nano-structuring of the paint formulation. Further stages include mixing a UV protection agent and/or pigment into the formulation before coating. A hand spray gun (6) applies the paint. In the equipment, optical fibers (3, 4) transmit UV light to the paint formulation.

    90.
    发明专利
    未知

    公开(公告)号:DE59603969D1

    公开(公告)日:2000-01-27

    申请号:DE59603969

    申请日:1996-09-16

    Applicant: BASF AG

    Abstract: Radiation-curable compsns. (I), contg. (a) radiation-curable, radically-polymerisable cpds. and (b) capped amino cpds. which are surface-active in cpds. (a) and which release amino cpds. with free prim. and/or sec. amino gps. when irradiated with high-energy light, the total no. of H atoms contained in amino gps. being at least 2. Also claimed is (i) a process for the prodn. of (I) by adding cpds. (b) to cpds. (a); (ii) a process for the prodn. of coatings or mouldings by irradiating (I) with high-energy light; (iii) moulded prods. or coatings obtd. by this process.

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