Abstract:
A radiation curable composition contains as light stabiliser a UV absorber of formula I ##STR1## wherein R is hydrogen or C.sub.1 -C.sub.18 alkyl, R.sub.1 and R.sub.2 are each independently of the other H, OH, C.sub.1 -C.sub.12 alkyl, halogen or halomethyl,R.sub.3 and R.sub.4 are each independently of the other H, OH, C.sub.1 -C.sub.12 alkyl, C.sub.1 -C.sub.18 alkoxy or halogen, andR.sub.5 and R.sub.6 are each independently of the other H, C.sub.1 -C.sub.12 alkyl or halogen. These UV absorbers are substantially non-yellowing.
Abstract:
A method of producing an article with a color-plus-clear composite coating is described. The method comprises the steps of applying a colored coating composition to a substrate, and applying a clear coating composition over the colored coating composition, wherein the clear coating composition is a curable coating composition comprising:(a) a first component comprising a polymer backbone having appended thereto at least one carbamate functional group, and(b) a second component comprising a compound having a plurality of functional groups that are reactive with said carbamate group.
Abstract:
A coated abrasive article comprising(a) a porous backing having a front side and a back side;(b) in direct contact with the porous backing, a make coat formed from a composition comprising a radiation curable adhesive applied over the front side of the backing;(c) a multiplicity of abrasive grits bonded by the make coat to the front side of the backing; and(d) a size coat overlying both the abrasive grits and the make coat. The invention also involves several methods for preparing the coated abrasive article. In all of these methods, a radiation curable make coat precursor is applied directly to the front side of the porous backing. No treatment coat is required to seal the backing prior to application of the make coat precursor.
Abstract:
A method of making synthetic color pigments comprises synthesizing monodispersed colloidal core particles by precipitation from a solution and applying dye material to the core particles either by adsorption directly into the core particles or by adsorption or incorporation into alumina fixation shells at the surfaces of the core particles. Additional functional shells may be applied to the dyed core particles for various reasons. The pigments are useful for the coloration of various media such as printing inks and paint compositions.
Abstract:
There is provided a water based water repellent coating composition, method of making and method of use. The coating composition comprises an emulsion having water as the continuous phase and, as the discontinuous phase, droplets of a nonvolatile organic water repellent composition, the emulsion containg an emulsion stabilizing amount of a hydrophobically modified polyacrylic acid polymer wherein the viscosity of the emulsion is less than about 100 Cps and the particle size of the droplets is less than about 50 microns. The relatively low viscosity and small particle size provides for easy application and excellent penetration into porous substrates. The process of making the compositions involves the making of a conventional emulsion of this type and then high kinetic energy processing so as to produce the desired viscosity and particle size. The method of use involves the application of the composition to a substrate followed by evaporation of the water and any volatile components from the composition.
Abstract:
The present invention relates generally to paints and paint bases, and, more specifically to a process and composition for providing a stable gel-free dispersion of zinc pyrithione plus cuprous oxide biocide in paint. In accordance with the process of the present invention, the paint or paint base contains an amine treated wood rosin in order to impart desired gelation-inhibition to the paint.
Abstract:
The present document describes the use of an inhibitor for cationic polymerization as an additive to a thermocurable composition based on at least one cationically polymerizable organic material and an initiator for cationic polymerization in the form of an onium compound or a compound of the formula (I)[M.sup.+n (L).sub.x ].sup.n+ nX.sup.- (I),in which n is 2 or 3, M is a metal cation selected from the group comprising Zn.sup.2+, Mg.sup.2+, Fe.sup.2+, Co.sup.2+, Ni.sup.2+, Cr.sup.2+, Ru.sup.2+, Mn.sup.2+, Sn.sup.2+, VO.sup.2+, Fe.sup.3+, Al.sup.3+ and Co.sup.3+, X.sup.- is an anion selected from the group comprising PF.sub.6.sup.-, AsF.sub.6.sup.-, SbF.sub.6.sup.-, BiF.sub.6.sup.-, derivatives of these anions in which at least one fluorine atom has been replaced by a hydroxyl group, and CF.sub.3 SO.sub.3.sup.-, or in which up to 50% of the anions X.sup.-, based on the total amount of anions, may be any desired anions, L is water or an organic .sigma.-donor ligand which contains, as bonding sites, one or more functional radicals selected from the group comprising --CO--, --CO--O--, --O--CO--O-- and --O-- and forms .sigma.-bonds with the central atom via the oxygen atom or atoms, and x is an integer from 0 to 6, and where the ligands L may be different within said definitions, or as an additive to components for the preparation of a composition of this type for avoiding initiator decomposition products which are formed due to moisture and reduce the thermal stability of the composition, and/or for increasing the thermal stability of the composition for a limited time before curing.
Abstract:
A corrosion protection composition a dispersion or solution of (a) colloidal size amorphous overbased sulfonate, (b) solvent or plasticizer, and (c) polymeric material soluble in the solvent or compatible with the plasticizer is disclosed. The composition comprises at least about 70% solids, by weight, and the particle size if the colloidal overbased sulfonate is up to about 100 A. Preferably, the composition is free from any mineral oil. Metal surfaces having the herein disclosed composition applied thereto, or having the applied thereto the composition from which the solvent has been removed also is disclosed.
Abstract:
A curable polymer composition for use in providing a dimensionally stable coating comprises a semi-interpenetrating polymer network. The semi-interpenetrating polymer network includes a reactive polymer component, cross-linking agent, and non-reactive polymer component. The non-reactive polymer component has a molecular weight of about 7,000-30,000, and preferably about 15,000. In preferred embodiments, the reactive polymer has a molecular weight of about 30,000-200,000, and preferably about 40,000-60,000. Spacecoat compositions made with formulations described, exhibit good long-term stability, and resistance to failure upon embossing of a substrate to which the retroreflective sheeting is applied.
Abstract:
A resin composition for cationically electrodepositable paint comprising, as principal components, (A) a resin containing a hydroxyl group and a cationic group, (B) an epoxy resin containing, per molecule, on the average at least 2 epoxy group-containing functional groups with an epoxy group bound to an alicyclic skeleton and/or a bridged alicyclic skeleton, and (C) a finely divided gelled polymer, said finely divided gelled polymer (C) being obtained by, in the first step, emulsion polymerizing (I) a monomer component composed of(a) a polymerizable unsaturated vinylsilane monomer containing a vinylic double bond and a hydrolyzable alkoxysilane group,(b) a polymerizable monomer containing at least two radically polymerizable unsaturated groups in a molecule,(c) a polymerizable unsaturated monomer containing a vinylic double bond and a hydroxyl group, and(d) the other polymerizable unsaturated monomer using a cationic reactive emulsifying agent containing an allyl group in a molecule; and in the second step, emulsion polymerizing (II) a monomer component composed of(e) a blocked monoisocyanate or polyisocyanate in which at least one isocyanate group in a molecule is blocked with a radically polymerizable monohydroxy compound,(f) a polymerizable unsaturated monomer containing a vinylic double bond and a hydroxyl group, and(g) the other polymerizable unsaturated monomer in the presence of the aqueous finely divided gelled polymer obtained in the first step, said polymer having a core-sheath structure in which the polymerized product of the monomer component (I) is a core and the polymerized product of the monomer component (II) is a sheath (shell).