Abstract:
The present invention relates to an aqueous dispersion comprising a solid pulverulent component A and an aqueous component B, said component A comprising a UV-curable powder coating material.
Abstract:
Radiation-curable formulations comprising i) at least one aliphatic, urethane-functional prepolymer which on average has at least two ethylenically unsaturated double bonds, ii) at least one monofunctional ester of an &agr;,&bgr;-ethylenically unsaturated carboxylic acid with a monofunctional alkanol which has a saturated, carbocyclic or heterocyclic structural element, and iii) if desired, a di- or polyfunctional ester of an &agr;,&bgr;-ethylenically unsaturated carboxylic acid with an aliphatic di- or polyol are used to coat substrates.
Abstract:
Polymers are obtainable by polymerising or copolymerising 2,7-dioxabicyclo[3.2.1]octane derivatives of the formula ##STR1## in which X, X', Y, Y', Z and Z' each independently are a C.sub.1 -C.sub.2 hydrocarbon radical or hydrogen.
Abstract:
Process for producing coatings or moldings by radiation curing, which involves using high-energy light to irradiate radiation-curable compositions containing 1-100% by weight, based on the total amount of free-radically or cationically polymerizable compounds, of compounds A) containing at least one cationically polymerizable 2,3-dihydrofuran structure.
Abstract:
A process for preparing (meth)acrylic esters by esterifying (meth)acrylic acid with monohydric or polyhydric alcohols comprises adding to the reaction mixture still comprising (meth)acrylic acid corresponding to an acid number of at least 5 mg of KOH per 1 g of reaction mixture at least one amino compound having at least one primary, secondary or tertiary amino group.
Abstract:
Radiation-curable compositions of reduced oxygen sensitivity comprise a) radiation-curable, free-radically polymerizable compounds, and b) capped amino compounds which are surface-active in compounds a) and on irradiation with high-energy light liberate amino compounds having primary, secondary or primary and secondary amino groups, the overall number of hydrogen atoms bonded in the amino groups (amine hydrogens) being at least 2.
Abstract:
A radiation-sensitive mixture essentially consisting of (a) a water-insoluble binder or binder mixture and (b) a compound which forms a strong acid on exposure to radiation, component (a) being a phenolic resin in which some or all of the phenolic hydroxyl groups have been replaced with groups (IA) or (IB) ##STR1## where R.sup.1, R.sup.2 and R.sup.3 are each alkyl or R.sup.1 together with R.sup.2 forms a ring and X is CH.sub.2, O, S, SO.sub.2 or NR.sup.4, is suitable for the production of relief structures.
Abstract:
Radiation-curable compositions comprising a) compounds having at least two carbon-carbon double bonds with which it is possible for primary or secondary amino groups to form adducts in the form of a Michael-analogous addition reaction (referred to in short below as activated double bonds) b) capped amino compounds which on irradiation with high-energy light liberate amino compounds having primary, secondary or primary and secondary amino groups, the overall number of hydrogen atoms bonded in the amino groups (amine hydrogen atoms) being at least 2.
Abstract:
A radiation-sensitive mixture consists of a polymeric binder which is insoluble in water but soluble in aqueous alkaline solutions, and of an organic compound whose solubility in an aqueous alkaline developer is increased by the action of an acid and which contains both one or more acid-cleavable groups and a group which forms a strong acid under the action of radiation.The radiation-sensitive mixture is suitable for use in photosensitive coating materials for the production of relief patterns and relief images.
Abstract:
A method for producing finely structured surfaces, in particular in plastics, includes a) applying at least one coating compound on at least one substrate; b) forming a fine structure by a die, which has the negative of a fine structure, c) curing the resultant finely structured coating compound, obtaining a substantially cured coating; and d) separating the finely structured coating from the die, wherein steps d) and c) can also be carried out in the reverse order.