Disclosed is a compound with the following formula (I):

##STR00001## as well as the use thereof, in particular as a chelating agent of positively charged ions, or as a fluidizing agent for hydraulic compositions. Also disclosed is a hydraulic composition comprising a compound with formula (I), at least one hydraulic binder, at least one aggregate, and water.

The present invention relates to a curable adhesive composition based on acetoacetate compound, and to its use in multi-purpose bonding applications. In particular, the present invention relates to a curable adhesive composition based on a multifunctional acetoacetate compound and polyoxyalkylene polyamines.

Structural adhesive films are presented which comprise branched or networked polymers which are the reaction product of one or more polyether sulfone polymers, which may include amine-terminated polyether sulfone polymers and/or hydroxy-terminated polyether sulfone polymers, with epoxy-functional chemical species including the reaction product of one or more first polyepoxides with an amine-terminated branched polytetrahydrofuran polymer. The structural adhesive films may possess high strength, holding power and durability in high-temperature applications.

The present invention relates to a polymer comprising repeating units consisting of a substituted pyrrole ring. In particular, the repeating units consist of substituted pyrrole containing polar groups capable of interacting with carbon allotropes such as carbon nanotubes, graphene or nanographites, in order to improve the chemical-physical characteristics of the allotropes mainly by increasing their dispersibility and stability in liquid media and in polymer matrices. The invention also relates to products of addition of these polymers with carbon allotropes in order to obtain easily dispersible macromolecules.

A two-component epoxy resin composition, made of: a resin component including: at least one epoxy resin that contains on average more than one epoxy group per molecule; up to 25 wt.-% of at least one epoxy-functional reactive diluent having one or two epoxy groups per molecule; and a hardener component including: between 40 and 80 wt.-% of at least one amino-functional hardener of formula (I),

##STR00001##

wherein n is an integer with a value of 2 or 3, R.sup.1 is a linear, cyclic or branched alkyl residue that optionally contains ether oxygen atoms and R.sup.2 is a methyl or ethyl group; between 10 and 30 wt.-% of at least one Lewis base having at least one tertiary amino group, amidine group, or guanidine group; and between 10 and 30 wt.-% of at least one carboxylic acid.

An ionic aqueous epoxy curing agent, a preparation method therefor and the use thereof. The aqueous epoxy curing agent is prepared by reacting the following raw materials in parts by weight: a) 1 part of a polyepoxy compound, b) 1.3-6 parts of a multifunctional compound, c) 0.2 to 1.25 parts of a monoepoxy compound, and d) 0.01 to 0.23 parts of a sultone, wherein the multifunctional compound has four or more active hydrogens. The curing agent obtained has a good hydrophilic effect and very good thinning performance, the paint film prepared by mixing same with an epoxy dispersion has the following advantages: excellent salt spray resistance and water resistance, strong adhesion, high hardness, etc.; in addition, the preparation process of the curing agent is simple, the conditions are mild, and room temperature curing is carried out.

An epoxy resin composition with epoxy groups and active hydrogens having different molar equivalents includes an epoxy resin component and a curing agent component. A mixing ratio of the epoxy resin component and the curing agent component is a mixing ratio of a cured product with the highest glass transition temperature Tg among cured products with different mixing ratios measured experimentally. According to a weight percentage in a total weight of the epoxy resin component, the epoxy resin component includes: 50 wt % to 100 wt % of a bisphenol A epoxy resin. According to a weight percentage in a total weight of the curing agent component, the curing agent component includes: 60 wt % to 98 wt % of polyetheramine (PEA) and 2 wt % to 20 wt % of a low-viscosity Mannich base.

The invention relates to a comb polymer having repeating units of at least one of the structures of formulae (I) to (IV) wherein R.sup.1 represents a polyoxyalkylene group and A represents an organic group, and wherein the comb polymer has end groups of the general formula (V) wherein R.sup.2 and R.sup.3 independent of each other are selected from a) organic groups having 1 to 24 carbon atoms and b) R.sup.1.

##STR00001##

A composition including cement, filler, polymer and a compound having epoxide groups and also an amine, wherein the composition contains more than 10% by weight of cement and at room temperature is present as storage-stable free-flowing powder and/or granular material. When mixed with water, the composition makes polymer-modified mortars having good processability, excellent adhesion, strength, water impermeability, chemical resistance and quick coatability possible.

Provided is a synthesis process for the one-step production of a monomeric polyether for polycarboxylic acid water reducing agents, wherein the monomeric polyether is synthesized in one step by mixing an initator and a catalyst at a temperature and a pressure, and then introducing same into a reaction kettle together with an epoxide at a certain ratio for ring opening polymerization. The synthesis process of the present invention realizes continuous production without the need of first synthesizing a prepolymer and then synthesizing a macromolecular monomeric polyether step by step, thereby improving the production efficiency. By separating four links, i.e. displacement, polymerization, curing and neutralization, in conventional monomeric polyether production processes, the present invention more effectively controls each of the links and increases the utilization efficiency of the reaction kettle; in addition, the process is easy to control, the structure of the product is stable, and the retention of double-bonds is high.