Abstract:
This invention relates to a hardener composition Η for an aqueous epoxy resin based two-pack coating formulation wherein the hardener composition Η comprises reaction products of at least difunctional epoxides H1, at least difunctional hydroxypolyoxyalkylenes Η2, at least difunctional hydroxyaromatic compounds H3, unsaturated fatty acids H42 having acarboxyl functionality of more one which comprise the so-called dimer fatty acids, secondary amines H having additional carbonylimine-blocked primary amino groups, obtained by reaction of amines H51 having at least one primary amino group and at least one secondary amino group 1 with carbonyl compounds H52 which have an aldehyde or ketone carbonyl group, optionally, hydroxy-functional secondary amines H6 having at least one secondary amino group and at least one hydroxyl group, and further optionally, amines H7 having at least one primary, and at least one tertiary amino group, wherein the unsaturated fatty acids H42 are incorporated into the hardener in the form of beta-hydroxy esters, and wherein water is added to liberate the 20 blocked primary amino groups.It also relates to a process for the preparation of the hardener H, to aqueous two-pack coating compositions with an epoxy resin E, and to the use of these coating compositions as first or primer layer to prepare multilayer coatings together with solvent-borne coating compositions for the upper layer.
Abstract:
A production method for a multicolor archaized wooden floor comprises the following steps: processing the raw material of wooden floor into a plain plate with wood natural color, then dyeing the plain plate deep color by aqueous dyeing; drying; polishing; dyeing the polished floor board light color by aqueous dyeing; drying; applying priming paint; drying; polishing; applying finish paint; drying.
Abstract:
The invention relates to a multi-layer coating comprising a first layer of an epoxy primer applied in the form of a two-pack water-based epoxy coating composition, and a second layer applied in the form of a coating composition comprising a Michael donor component, a Michael acceptor component, and a catalyst for the Michael addition reaction between Michael donor component and Michael acceptor component, wherein the two-pack water-based epoxy coating composition comprises an epoxy resin and a hardener or epoxy curing agent, wherein at least one of the epoxy resin and the hardener or epoxy curing agent is hydrophilically modified by incorporation of a hydrophilic moiety or by addition of at least one emulsifier, wherein a modified epoxy resin Ε* and/or a modified hardener Η* is present in the composition, wherein the modified epoxy resin E* comprises a specific amount of substance of long chain alkyl groups in the epoxy resin component of from 0.2 mol/kg to 2 mol/kg, and the modified hardener H* comprises a specific amount of substance of long chain alkyl groups in the hardener component of from 0.2 mol/kg to 2 mol/kg, and wherein the specific amount of substance of long chain alkyl groups in the combination of epoxy resin E* and/or a modified hardener H* is from 0.2 mol/kg to 2 mol/kg, to a process of making the coating compositions, and to a method of use of these coating compositions.
Abstract:
Beschichtungsstoffkombination bestehend aus einem Beschichtungsstoff zur Ausbildung einer Füllerschicht und einem Beschichtungsstoff zur Ausbildung einer Decklackschicht sowie deren Verwendung zur Herstellung eines aus einer Füllerschicht und Decklackschicht bestehenden Beschichtungssystems auf einem Substrat. Bei dem Substrat handelt es sich vorzugsweise um die Karosserie oder die Kabine eines Kraftfahrzeugs oder um einen Bestandteil einer solchen. Die erfindungsgemäße Beschichtungsstoffkombination eignet sich insbesondere zur Herstellung von Beschichtungen bestehend aus einer gehärteten Füllerschicht und einer gehärteten Decklackschicht auf Personenkraftwagen und Nutzfahrzeugen, wie Lastkraftwagen, Vans oder Omnibussen.
Abstract:
Die vorliegende Erfindung betrifft eine Vorrichtung, deren Verwendung und ein Verfahren zur Herstellung von hoch porösen, kristallinen Oberflächenbeschichtungen mit wenigstens zwei in sequenzieller Abfolge arbeitenden Sprühvorrichtungen zum Auftragen von Beschichtungsmitteln aus den Vorratsgefäßen (3, 4) auf ein auf einem Probenhalter (1) angeordnetes Material und wenigstens einer Spülvorrichtung (5, 13, 16) zur Entfernung ungebundener Moleküle von der beschichteten Oberfläche.
Abstract:
Beschichtetes flächiges Kunststoffmaterial umfassend a) als Grundkörper ein thermoplastisches Kunststoffsubstrat; und b) auf dem Grundkörper eine photokatalytisch wirksame Beschichtung umfassend -eine wasserspreitende Schicht, bei der es sich entweder um eine Sol-Haftvermittlerschicht Schicht b1+2), umfassend einen Haftvermittler und ein Kolloidsol, oder um eine Kolloidsolschicht b2), welche auf einer auf dem Substrat a) aufgebrachten Haftvermittlerschicht b1) angeordnet ist, handelt, und -eine auf der Wasser spreitenden Schicht b1+2) oder b2) angeordnete photokatalytisch wirksame Schicht b3), die durch Aufbringen und Trocknen einer Mischung erhältlich ist aufweisend bezogen auf den Feststoffanteil der Mischung in Gewichtsprozent b31) 1 bis 25 % Titandioxid und b32) 75 bis 99 % Siliziumdioxid und/oder eines nicht wasserlöslichen Metalloxids oder eines anionisch modifizierten Siliziumdioxids oder Metalloxids; wobei das Titandioxid partikelförmig ist mit einer mittleren Partikelgröße der Primärpartikel von kleiner als 10 nm. In Linie Verfahren zu dessen Herstellung sowie Verwendung als Bedachungs- und Verglasungsmaterial, vorzugsweise in Feuchträumen. Das beschichtete flächige Kunststoffmaterial der Erfindung kombiniert die Wasserspreitung mit der photokatalytischen Wirksamkeit ohne dass die thermoplastischen Kunststoffsubstrate geschädigt werden. Das erfindungsgemäße beschichtete flächige Kunststoffsubstrat wird in einem wenig aufwändigen, kostengünstigen und schnellen in Linie Verfahren hergestellt und überzeugt bei seiner Verwendung durch Stabilität des Substrats und Wirksamkeit der Beschichtung gegen anfängliche Algenbildung.
Abstract:
A method of forming a composite coating is provided including (a) applying a first powder base coating to a substrate; and (b) either (1) applying a second powder base coating comprising flake or platelet effect pigment and heating the first and second base coats to substantially level the second base coat and allow migration of the effect pigment to a surface region thereof but not sufficient to cause the second base coat to cure; and (2) applying a top coating and substantially curing the resultant composite coating; or alternatively, (3) heating the first base coat to form a generally continuous film; (4) applying the second powder base coating comprising the effect pigment and heating the second base coat to substantially level the second base coat and allow migration of the effect pigment to a surface region thereof; and (5) applying the top coating and substantially curing the resultant composite coating.
Abstract:
A process for applying a two-tone color effect coating to a substrate including applying an accent powder basecoating composition including film-forming material; reaction product as described herein; flow control agent; and first color effect additive, to a first predetermined portion of a surface of a substrate; at least partially curing the accent basecoating; applying a main liquid or powder basecoating composition having a different color effect additive to a second predetermined portion of the substrate, such that a portion of the accent basecoat is not contacted by the main basecoating composition; at least partially curing the main basecoating composition; applying a topcoating composition over the accent basecoat and main basecoat and curing the resulting composite coating, such that the first portion of the substrate has a different color effect than the second portion of the substrate to provide a two-tone color effect coated substrate.
Abstract:
According to a process for applying multiple layers of lacquer on a substrate, a base lacquer layer made of an aqueous coating agent is applied on the possibly precoated substrate, then by covering the base layer is covered with a clear lacquer which contains: (A) at least a hydroxyl group-containing copolymer produced by reacting (a) one or several esters of alpha -branched aliphatic saturated monocarboxylic acids having one or several epoxide groups or ethylene double bonds in the alcohol part, with (b) one or several alkyl esters of alpha , beta -ethylenically unsaturated carboxylic acids, (d), if required, one or several alpha , beta -ethylenically unsaturated carboxylic acids and (e), if required, one or several vinyl monomers different from (a), (b), (c) and (d); (B) one or several polyisocyanates with in average at least 1.5 NCO groups in the molecule in such an amount that the equivalent ratio between the OH groups of component (A) and the NCO groups of component (B) lies between 1:1.6 and 1:2.2.
Abstract:
An aqueous acrylic dispersion with higher polarity outside than inside the particles is useful in an automotive basecoat under a solvent-based clear coat.