Abstract: A crosslinkable composition including a component A with at least 2 acidic protons C—H in activated methylene or methine groups (the RMA donor group), and a component B with at least 2 activated unsaturated groups (the RMA acceptor group), and a catalyst system C that contains, or is able to generate a basic catalyst capable of activating the RMA reaction between components A and B, characterised in that the cross-linkable composition further includes an X—H group containing component D that is also a Michael addition donor reactable with component B under the action of catalyst C, wherein X is N, P, O, S or wherein X is C as part of an acidic methyl (CH3) group. A component D and catalyst additive mixtures for the manufacture of RMA crosslinkable composition.

Abstract: An RMA crosslinkable composition for making thick coating layers having at least one crosslinkable component comprising reactive components A and B each including at least 2 reactive groups wherein the at least 2 reactive groups of component A are acidic protons (C—H) in activated methylene or methine groups, and the at least 2 reactive groups of component B are activated unsaturated groups (C?C), to achieve crosslinking by Real Michael Addition reaction, the composition further including a base catalyst (C), an X—H group containing component (D) that is also a Michael addition donor reactable with component B under the action of catalyst C, wherein X is C, N, P, O or S and a sag control component (E). A crosslinkable composition is also disclosed for preparing thick coating layers having a dry thickness of at least 70 mu having a surface appearance and hardness of the resulting cured composition.

Abstract: A process for the preparation of a thixotropic aqueous coating composition comprising the steps of: i) providing an aqueous dispersion of a binder system comprising carbonyl and hydrazide functional groups for crosslinking; and ii) reacting in the aqueous dispersion, an ether amine with a tris(isocyanate) isocyanurate to form a polyurea sag control agent.

Abstract: The invention relates to a process for the preparation of aqueous vinyl polymer dispersions having good film forming properties, good stability and in can clarity, to the polymer dispersions obtainable by the process and coating compositions prepared from said polymer dispersions and the use thereof. The process comprising, (1) a first polymerization step comprising (1a) preparing an emulsion (1A) in water of a first monomer mixture (1a1) comprising carboxylic acid functional monomers, a surfactant (1a2) and water soluble inorganic salt (1a3) wherein surfactant (1a2) is a sulfur based anionic surfactant containing less than 60 wt % ethylene oxide and wherein the salt (1a3) content at the start of polymerization (1b) is between 0.

Abstract: The present invention relates to a crosslinkable composition comprising at least one crosslinkable component crosslinkable by a latent base crosslinking catalyst comprising a substituted carbonate salt according to formula 1 wherein X+ represents a cation and wherein R is hydrogen, alkyl, aryl or aralkyl group, and wherein the crosslinkable composition comprises 0.1-10 wt %, preferably 0.1-5, more preferably 0.2-3 and most preferably 0.5-1.5 wt % water (relative to total weight of the crosslinkable composition). The invention further relates to a coating composition comprising the crosslinkable composition according to the invention, a novel catalyst composition and to the use of said catalyst composition according to the invention as a latent base crosslinking catalyst in coating compositions, preferably in RMA crosslinkable compositions.

Abstract: A polyurea compound obtainable by reacting one or more polyisocyanates with one or more non-chiral mono-amines (I) and one or more chiral mono-amines (II) and co-precipitating the reaction products to form the polyurea compound, wherein 2-98 mole % of the mono-amines in the polyurea compound are chiral mono-amines. The invention also relates to the use of said polyurea compound as a rheology modification agent, in particular as sag control agent (SCA) in coating compositions. The invention further relates to sag control agent compositions, coating compositions and coatings comprising the polyurea compound as sag control agent.

Abstract: The present invention relates to a film forming composition comprising a resin and modified nanoparticles comprising nanoparticles and adsorbed thereon a segmented copolymer, preferably a segmented blockcopolymer, comprising an adsorbing segment and a hydrophobic surface active segment, wherein the adsorbing segment has one or more functional groups that adsorb on the nanoparticles and wherein the hydrophobic segment is more hydrophobic than the resin providing surface migration of the nanoparticles. The invention also relates to novel modified particles and the use of the specified segmented copolymer of specified modified particles in a film forming composition for imparting thereto improved surface properties such as scratch resistance.

Abstract: The invention relates to an aqueous dispersion for use as open time improver in a coating composition which aqueous polymer dispersion comprises a first polymer having a number average molecular weight (Mn) of from 2,000 to 120,000 (determined by gel permeation chromatography using a mixture of tetrahydrofurane and acetic acid as eluent), an acid value of from 30 to 150 mg KOH/g, and an ethylene-oxide wt % (on total solid polymer) of from 1 to 20 wt %, said first polymer dispersion being obtainable by free radical polymerization of a monomer mixture in the presence of at least one free-radical initiator and at least one surfactant, said monomer mixture comprising : a) 5 to 20 wt %, preferably 7 to 10 wt %, acid functional ethylenically unsaturated monomers or precursors thereof or ethylenically unsaturated monomers comprising ionic group precursors; b) 5 to 25 wt %, preferably 7 to 20 wt %, ethylenically unsaturated monomers containing polyethylene oxide, polyethylene glycol or mono-alkoxypolyethylene glycol

Abstract: A polymeric composition for making aqueous polymeric dispersions, comprises hydrophilic macromonomer (I), hydrophobic polymer (II) and bridging monomer (III), wherein the hydrophilic macromonomer (I) and hydrophobic polymer (II) are grafted together in the presence of bridging monomer (III) and the hydrophilic macromonomer (I) has a structure according to formula (1): R—C(X)?CH2, wherein R is a polymeric group and X is a radical stabilizing group. The aqueous polymeric composition is used for making a coating composition, a printing ink, an adhesive, a sealant or caulking material.

Abstract: The invention relates to a process for the preparation of an aqueous hybrid polymer dispersion comprising an auto-oxidatively crosslinkable polymer and an addition polymer. The invention further relates to the aqueous hybrid polymer dispersion obtainable by said process, the use thereof for the manufacture of coating compositions, ink compositions or adhesives and to coating compositions includes the hybrid polymer dispersion as a binder. The process includes a first polymerization step wherein a first hybrid polymer dispersion is formed by addition polymerization of vinyl monomers in the presence of dispersed auto-oxidatively crosslinkable polymer and a second polymerization step wherein secondary polymerization loci are provided in the first hybrid polymer dispersion to polymerise residual vinyl monomer of the first polymerisation step.

Abstract: A thixotropic agent comprising a first polyurea reaction product of a first polyisocyanate with a first amine and a second polyurea reaction product of a second polyisocyanate with a second amine different from the first polyurea reaction product precipitated in the presence of the colloidal particles of the first reaction product.

Abstract: The invention relates to coated particles comprising particles and a crosslinked polysiloxane coating and to a process for the manufacture of said coated particles. Further, the invention relates to the use of the coated particles to improve surface properties of articles and to material compositions comprising the coated particles, in particular coating compositions. According to the invention there is provided coated particles comprising particles having a surface with hydroxy functional groups and a crosslinked polysiloxane coating comprising a reaction product of polysiloxane disilanol according to formula I: wherein n is 1 to 25, and wherein each R is a same or different hydrocarbon group, and a coating crosslinking agent, preferably an alkoxysiloxane having 3 or 4 alkoxy groups which polysiloxane coating is at least partly grafted to the particle surface by reaction with the hydroxy functional groups on the particles.

Abstract: The invention relates to a process for the manufacture of a waterborne multistage polymer dispersion that has ethylenically unsaturated functional groups for crosslinking. The process comprises the steps of; a. making an aqueous emulsion or solution of a first stage polymer comprising carboxylic acid functionalized monomers to an amount sufficient to make the first stage polymer water soluble or dispersible, b. at least partially neutralizing the first stage polymer with a base, c. forming a two-stage polymer dispersion by adding to the at least partially neutralized first stage polymer a second stage monomer mixture and emulsion polymerizing said second stage monomer mixture to a second stage polymer which is less hydrophilic than the first stage polymer, d. reacting with the obtained two-stage polymer dispersion a bi-functional compound comprising an ethylenically unsaturated group and a group reactive towards the carboxylic acid in the two-stage polymer.

Abstract: The invention relates to the use as sagging controlling agent (SCA) in coating compositions of rheology control agents obtainable by reacting one or more polyisocyanates with one or more optically active amines or by reacting one or more polyamines with one or more optically active isocyanates. The invention also relates to rheology control agents obtainable as described above using specific polyisocyanates or polyamines. In addition the invention relates to the use of these rheology control agents in various applications.

Abstract: The use of a commixture as a sag control agent (SCA) in a composition to be cured at a temperature (Tcur) greater than 60° C., said composition comprising a binder and the commixture and wherein said commixture comprises: (a) a thixotropy-inducing particulate polyurea product having a melting temperature (Tm1) at least 10° C. below the intended curing temperature, thereby satisfying the requirement Tm1<(Tcur?10° C.); and (b) a second thixotropy-inducing particulate component that retains its particulate nature at temperatures at least up to said curing temperature.

Abstract: The invention relates to a high gloss car wash-resistant coating composition comprising an epoxy-functional binder and a cross-linker reactive with the epoxy groups of the binder and a method to prepare such a car wash-resistant coating. The invention further relates to the use of said coating composition, as a pigment-free top coat or a clear coat, in the finishing and refinishing of articles, for example motorcycles, cars, trains, buses, trucks, and aeroplanes. The coating composition after curing forms a coating having an initial gloss of at least 81 GU and a loss of gloss (LoG) of less than 0.25, the loss of gloss being determined by the formula (I) LoG =(1?e(A/X)/(1+eK)+(1?eD*?Tg)??(I) wherein K=B*(Tgonset?C) In formula I A=?8.03, B=?0.21, C=328 and D=?0.00304.

Abstract: A thixotropic agent comprising a first polyurea reaction product of a first polyisocyanate with a first amine and a second polyurea reaction product of a second polyisocyanate with a second amine different from the first polyurea reaction product precipitated in the presence of the colloidal particles of the first reaction product.

Abstract: The invention relates to a high gloss car wash-resistant coating composition comprising a hydroxyl-functional binder and a cross-linker reactive with the hydroxyl groups of the binder and a method to prepare such a car wash-resistant coating. The invention further relates to the use of said coating composition, as a pigment-free top coat or a clear coat, in the finishing and refinishing of articles, for example motorcycles, cars, trains, buses, trucks, and aeroplanes. The coating composition after curing forms a coating having an initial gloss of at least 81 GU and a loss of gloss (LoG) of less than 0.18, the loss of gloss being determined by the formula (I): LoG=A+B·E?·(X)?1·10(C·?Tg)+D·(E?)?0.5; wherein A=0.0132, B=1.0197, C=0.0113, and D=0.0566, E? reflects the tensile storage modulus at 40° C. in GPa, ?Tg the width of the glass transition temperature in ° C., and X the cross-link density parameter in kPA/K all three parameters determined in a DMTA test at 11 Hz and a heating rate of 5° C./min.

Abstract: The invention relates to the use as a sag control agent (SCA) in coating compositions of a rheology modification agent obtainable by reacting one or more polyisocyanates with one or more derivatives of optically active amino acids.

Abstract: The invention pertains to a method for making a block or gradient final (co)polymer comprising a step of radically polymerizing a mixture of ethylenically unsaturated monomers in the presence of a) a radical precursor and b) an iodine atom-containing intermediate polymer or a mixture of iodine atom-containing intermediate polymers, wherein the iodine atom-containing intermediate polymer comprises at least 50 mole % of methacrylate monomers and is obtainable from a polymerization of ethylenically unsaturated monomers.