The present invention relates to a curable composition containing (A) a cyclic molecule that contains three or more side chains each having at a terminal thereof an active hydrogen-containing group, (B) a urethane prepolymer having an iso(thio)cyanate group on each of both terminals of a molecule, (C) a diol, and (D) an amino group-containing monomer.

According to the present invention, it is possible to provide a curable composition that gives a cured product having a high abrasion resistance and capable of exhibiting superior mechanical properties, in particular, a curable composition that can give a cured product capable of being suitably used in a polishing pad.

The invention relates to a method for producing soft polyurethane foam obtained by reacting a composition containing a component A1 containing at least one filled polyol, a component A2 containing compounds reactive with isocyanates and having a hydroxyl value of 20 to <100 mg KOH/g, the component A2 not containing any filled polyol, a component A3 containing water and/or at least one physical blowing agent, a component A4 containing auxiliary agents and additives, and a component B containing di- and/or polyisocyanates, characterized in that the reaction occurs in the presence of 0.5 to 3 parts by weight of an organic urea derivative as component C, which is obtained by reacting urea with a difunctional amine having a number-average molecular weight of 200 to 1000 g/mol. The invention also relates to a soft polyurethane foam obtainable by the method.

A polyurethane foam which is obtained from an inert gas and a polyurethane reaction composition containing a polyol component, a foam stabilizer, a catalyst and an isocyanate component, by a mechanical froth method, wherein: the polyol component contains a polymer polyol having a solid content of from 20% by weight to 43% by weight; and the polyurethane reaction composition contains an acid-modified polyolefin powder.

An algal bio-adhesive comprising algae mass, a crosslinking agent and an inorganic filler.

A two-component polyurethane composition including of a polyol component and a polyisocyanate component, wherein the polyol component includes at least one reaction product of castor oil with ketone resins A1, at least one aliphatic triol A2, preferably an aliphatic diol A3, a polybutadiene polyol A4 and at least one hydroxylated polyester polyol A5 based on tall oil. The polyurethane composition has high strength and only a minor dependence of mechanical properties, especially of strength, on temperature. Moreover, the composition is capable of curing without blistering under ambient conditions, even in the presence of substrates that typically promote foaming reactions owing to the presence of residual moisture, for example glass fiber weave.

Distiller's Grain (DG) based bio-adhesives consisting of DG biomass, crosslinking agents, and fillers are described as substitutes for formaldehyde based wood glue for making wood panels. Algal bio-adhesives consisting of algal biomass, crosslinking agents, and fillers are described as substitutes for formaldehyde based glue for making wood panels. Processes for preparing such DG based bio-adhesives and algal bio-adhesives are provided, comprising the steps of: combining DG biomass or algal material with a cross-linking agent and inorganic fillers to form a blend; micronization or homogenization of the blend to obtain powdery material; and mixing the powdery material with additional water to form a bio-adhesive.

A biomass-based thermoplastic polyurethane is provided. The biomass-based thermoplastic polyurethane is a reaction product of a composition. The composition includes 1-50 parts by weight of a modified lignin, 50-99 parts by weight of a first polyol, and 40-60 parts by weight of a diisocyanate. The modified lignin has an OH value of less than 3.0 mmol/g. The sum of the modified lignin and the first polyol is 100 parts by weight.

The present invention relates to a method of synthesis and the use of foamed, cross-linked polyurethane polymers, as a three-dimensional support called a scaffold for cell cultures in vitro and for in vivo implantation for the regeneration of connective tissues such as adipose tissue, osteochondral tissue and bone tissue. In particular, the invention relates to a method of preparing polymers or foamed polyurethane co polymers, having improved hydrophilia, which involves the use of two types of catalyst, one for the cross-linking reaction and one for the foaming reaction and the use of at least one polar aprotic high-boiling solvent. Said method comprises the following steps in sequence: a) providing a solution of a polyol or a mixture of polyols in a solvent or mixture of solvents; b) heating the solution in step a) to a temperature higher than the softening temperature of the polymer precursors; c) optionally adding an organic or inorganic filler material; d) adding to the mixture in step c) an aliphatic poly-isocyanate or a mixture of poly-aliphatic isocyanates; e) adding to the mixture in step (d)) a porogenic additive; f) adding to the mixture in step e) simultaneously a cross-linking catalyst of polyols with poly-isocyanates and a foaming catalyst to form a foamed polyurethane polymer or co-polymer; g) isolating the foamed polyurethane polymer or co-polymer produced in step f).

A functional resin material is manufactured by the following reagents including a polyol, a polyamine, a first cross-linking agent, a second cross-linking agent, and a nanocellulose. Each of the first cross-linking agent and the second cross-linking agent includes an isocyanate block. The nanocellulose includes a repeating unit represented by formula (1), ##STR00001##

A biomass-based thermoplastic polyurethane is provided. The biomass-based thermoplastic polyurethane is a reaction product of a composition. The composition includes 1-50 parts by weight of a modified lignin, 50-99 parts by weight of a first polyol, and 40-60 parts by weight of a diisocyanate. The modified lignin has an OH value of less than 3.0 mmol/g. The sum of the modified lignin and the first polyol is 100 parts by weight.