The present invention provides a carbodiimide composition containing a water-soluble modified polycarbodiimide (A) and a water-insoluble polycarbodiimide (B), a curing agent composition using the same, a coating composition, and a resin cured product.

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 isocyanate composition comprising a blocked isocyanate compound in which an isocyanate group of an isocyanate compound is blocked with a fluoroalcohol compound, and at least one amidate compound represented by the following Formula (2):

##STR00001##

wherein B, G, J, R.sup.7. and R.sup.8 are as defined in the specification.

The present invention relates to a process for bonding substrates, wherein the bond is a bond that can be released by heat treatment at a temperature of 50° C. to less than 200° C. and a composition is used to produce the bond, said composition containing a polymer of formula (I): Q-(O—C(O)—CR′R″—C(O)—R).sub.x, where: Q=a polymer group, selected from a polyester group and/or a polyolefin group, wherein the polymer group does not contain any components that result from the use of molecules having (meth)acrylic acid units as monomers; x is greater than or equal to 1; R.sup.1=R.sup.2 or O—R.sup.3; R2=a hydrocarbon group, which can be substituted with halogen atoms, comprising 1 to 10 carbon atoms; R3=a hydrocarbon group, which can be substituted with halogen atoms, comprising 1 to 10 carbon atoms, or a polymer group; R′=—H, or a hydrocarbon group, which can be substituted with halogen atoms, comprising 1 to 10 carbon atoms, or a group of formula (II): —C(O)—NH-Q′, where Q′=an organic group which can also have one or more silicon atoms; and R″=—H or a group of formula (II), with the proviso that if neither of the groups R′ and R″ is a group of formula (II), then at least one of the groups R′ or R″ is —H.

Provided are adhesives containing a phenoxy resin grafted with methyl methacrylate (MMA) and/or methacrylic acid (MAA), and including a uretdione or a silane. The adhesive compositions are completely or substantially absent free isocyanate. The grafted phenoxy resin forms crosslinking which allows the adhesive to chemisorb to a metal surface, diffuse and entangle in a urethane elastomer and/or provide crossbridging and/or crosslinking across an interface of the adhesive and a cast urethane. Methods of adhering a castable urethane to a substrate, using the provided adhesives, are also provided.

The present invention provides a coating film having a structure represented by the following general formula (1) (in the formula, R.sup.11 is a residue formed by removing one isocyanate group from a polyisocyanate, and R.sup.12 is an alkyl group or an alkoxy group having 2 to 12 carbon atoms, R.sup.13 is a residue formed by removing one hydroxyl group from a polyol), wherein a König hardness of the coating film is 20 or more, in an SS curve measurement of a tensile test, the coating film has an elastic deformation region and a plastic deformation region, and in the SS curve measurement, a stress at an inflection point stress between the elastic deformation region and the plastic deformation region is 5 MPa or more.

##STR00001##

A curable coating composition includes: (a) a polymer including at least two active methylene functional groups; (b) a polyisocyanate crosslinker; and (c) a transition metal catalyst. Substrates at least partially coated with these coating compositions are further disclosed. Methods for preparing the coating are further disclosed. Multi-layer coatings including these coating compositions are further disclosed.

What is described are isocyanate compositions comprising β-dicarbonyl compounds and a binder system, especially for use in a process from the group consisting of polyurethane cold-box process and polyurethane no-bake process, with this isocyanate composition as polyisocyanate component.

A precursor formulation of a liner comprising a polymer and at least two curatives is disclosed. One of the at least two curatives comprises a curative formulated to preferentially react with the polymer and the other of the at least two curatives comprises a blocked curative formulated to be substantially unreactive with the polymer. A method of lining a rocket motor is also disclosed, as is a rocket motor including the liner.

The present invention relates to a polyisocyanate composition comprising a formation component having isocyanate groups, the isocyanate groups having been reacted to an extent of ≥98% with at least one CH-acidic compound, characterized in that the formation component consists to an extent of ≥51% by weight of at least one polyisocyanate based on pentamethylene 1,5-diisocyanate having a content of isocyanurate trimer of ≤60 area %, based on the total weight of the polyisocyanates based on pentamethylene 1,5-diisocyanate, and the remaining proportion up to 100% by weight of the total amount of polyisocyanates present in the formation component consists of at least one aliphatic or cycloaliphatic polyisocyanate. The present invention further provides a one-component system comprising the polyisocyanate composition, a process for producing a coating on a substrate, and the coatings obtainable from the one-component system.