The invention relates to a process for preparing a derivatized polysaccharide and stable isocyanate-based dispersions comprising derivatized polysaccharide.

The invention relates to the use of at least one open-chain, optionally branched, ether isocyanate having an NCO functionality≥1, wherein 2 or 3 carbon atoms are present between at least one NCO group and at least one ether-oxygen atom, optionally in the presence of other reactants such as alcohols, amines, water, CO.sub.2, or of other reactants having an NCO functionality≥1, optionally in the presence of at least one catalyst, to increase the reaction speed and/or to reduce the optionally required catalyst amount during isocyanate modification. The invention further relates to a process for modifying isocyanates, to the modified isocyanates as such and to a two-component system or one-component system and to the moldings, coatings and composite parts obtainable therefrom.

An aqueous dispersion of capsules, comprise a polymeric shell surrounding a core, the core comprises an oligomer or polymer having at least 3 repeating units comprising a functional group according to general formula (I), (II) or (III) The dispersion of the capsules can be incorporated in an aqueous pigmented inkjet ink.

##STR00001##

An aqueous polymeric particle dispersion, the particle comprises a polymer and a Si—O-containing moiety, the Si—O-containing moiety is linked to the polymer. The polymeric particle dispersion can be incorporated in aqueous printing liquids such as aqueous inkjet inks.

A polyaspartic coating composition that contains: an aspartic acid ester compound of formula (I):

##STR00001##

where X is an n-valent organic group, R.sub.1 and R.sub.2 are identical or different organic groups inactive against an isocyanate group under reaction conditions, and n is an integer of 2 or more; and a polyisocyanate composition comprising a polyisocyanate obtained from at least one trisocyanate compound of formula (VIII):

##STR00002##

where each Y.sup.1 independently represents a single bond, or a divalent hydrocarbon group which may have at least one selected from the group consisting of an ester structure and an ether structure, the Y.sup.1 groups are identical to or different from each other, and R.sup.3 is a hydrogen atom or a monovalent hydrocarbon group.

A multi-component resin system can be used for producing a mortar composition based on isocyanate amine adducts for the chemical fastening of construction elements. A mortar composition based on isocyanate amine adducts can be produced from the multi-component resin system. A method can be used for the chemical fastening of construction elements in mineral substrates with the mortar composition based on the isocyanate amine adducts.

Embodiments provide a coating material containing: (A) 100 parts by mass of an acrylic curable resin; (B) 5-200 parts by mass of aluminum oxide particles having an average particle size of 1-100 μm; (C) 0.1-20 parts by mass of aluminum oxide fine particles having an average particle size of 1-100 nm; and (D) 1-100 parts by mass of a compound having two or more isocyanate groups per molecule. In one embodiment, the acrylic curable resin (A) includes: (a1) a structural unit derived from a hydroxy group-containing (meth)acrylic acid ester; (a2) a structural unit derived from a vinyl aromatic compound; and (a3) a structural unit derived from a (meth)acrylic acid alkyl ester. In one embodiment, the acrylic curable resin (A) may contain, in addition to the structural units (a1) and (a2): (a3-1) a structural unit derived from methyl methacrylate; and (a3-2) a structural unit derived from an aliphatic (including alicyclic) alkyl ester having 4 or more carbon atoms of a (meth)acrylic acid.

Core shell microcapsules are provided wherein the capsule shell is an interfacial copolymer formed of a gelatin and an isocyanate.

The invention provides a method for producing an amidate compound, comprising reacting an imidazolium carboxylic acid salt represented by the following formula (1):

##STR00001##

wherein R.sup.1 to R.sup.5 are as defined in the specification, with a polyisocyanate compound represented by the following formula (2):

##STR00002##

wherein A and x are as defined in the specification, and wherein the produced amidate compound is represented by the following formula (3):

##STR00003##

wherein y, z, A, and R.sup.1 to R.sup.5 are as defined in the specification.

The present invention provides a blocked polyisocyanate composition comprising a blocked polyisocyanate compound and an amidate compound represented by the following Formula (2):

##STR00001##

wherein B, R.sup.4, R.sup.5, R.sup.6, R.sup.7, R.sup.8, R.sup.9, R.sup.10, and R.sup.11 are as defined in the specification.