The present invention relates to a semi-crystalline mixture of polyester polyols which recrystallises upon melting and which can be obtained by polycondensing a reaction mixture comprising one or more dicarboxylic acids selected from saturated aliphatic dicarboxylic acids having an even number of at least 8 methylene groups, and one or more diols selected from aliphatic diols which have at least one ether function. The invention also relates to a polymeric material which is obtained from the chemical modification of the mixture of polyester polyols with organic compounds which contain at least one isocyonate group and/or epoxide group. The mixtures and materials according to the invention are characterised by relatively low melting enthalpies, while the melting temperature can be set in a range of −30 to 60° C., meaning that it is possible to obtain easily fusible formulations containing the mixtures and materials according to the invention. The mixtures and materials according to the invention also provide such formulations with a high elasticity and breaking resistance. The present invention therefore includes the use of the polyester polyols and polymeric materials according to the invention as deforming, fusing, and extrusion means in thermoplastic materials, and the use thereof for producing adhesives and sealants, in particular hot-melt adhesives and reactive adhesives.

Disclosed is a moisture reactive polyurethane hot melt adhesive composition prepared from a mixture comprising a polyisocyanate, a polyester polyol, a polyether polyol; a thermoplastic polymer; inorganic filler; optionally a MA-SCA acid; and optionally one or more additives; wherein the polyester polyol is polymerized from a diacid and a diol; wherein the structure of the diacid is HOOC—(CH.sub.2).sub.m—COOH; wherein the structure of the diol is HO—(CH.sub.2).sub.n—OH; wherein the sum of (m+n) is equal to or less than 8; and wherein the acid number of the polyester polyol is less than 0.9. The disclosed reactive hot melt adhesive composition has improved thermal stability compared to conventional moisture reactive polyurethane hot melt adhesive compositions while maintaining their desirable properties.

The present invention relates to a reactive polyurethane prepolymer composition, which can be used as a hot melt adhesive, comprising a first polyurethane prepolymer which is the reaction product of the reaction of methylene diphenyl diisocyanate (MDI) with poly(1,6-hexamethylene adipate) glycol (PHAG) with a molecular weight (Mw) of 500 g/mol to 10,000 g/mol and with an NCO content of 0.5 wt % to 7 wt %, preferably of 3 wt % to 7 wt % and more preferably of 5 wt % to 7 wt %, comprising less than 0.1 wt % free MDI monomer based on the total weight of the first polyurethane prepolymer, a second polyurethane prepolymer which is the reaction product of the reaction of methylene diphenyl diisocyanate with polypropylene glycol (PPG) or a succinic acid based polyester polyol with a molecular weight (Mw) of 250 g/mol to 4,000 g/mol and with an NCO content of 0.5 wt % to 12 wt %, preferably of 3 wt % to 11 wt % and more preferably of 5 wt % to 10 wt %, comprising less than 0.1 wt % free MDI monomer based on the total weight of the second polyurethane prepolymer, and optionally one or more catalysts, as well as a process for producing said reactive polyurethane prepolymer composition, a method for adhesively joining or sealing two substrates and the use as an hot melt adhesive.

Disclosed is a method of producing a fabric product, the method comprising preparing an upper; preparing a lining fabric; layering a thermoplastic hot-melt film between the upper and the lining fabric for bonding the upper and the lining fabric; bonding a lining fabric to the upper, wherein the thermoplastic hot-melt film consists of the composition selected from the group consisting of thermoplastic polyurethane, ethylene vinyl acetate, polyamide and polyester compositions, wherein the thermoplastic hot-melt film further contains nanosilica, wherein a content of the nanosilica is 0.1 to 5.0 Parts per Hundred Resin (phr) and a size of the nanosilica is less than 100 nm.

The present invention provides a laminate 10 including: a foamed polyurethane layer 11 obtained from a foamable polyurethane resin composition containing an active hydrogen group-containing tin ricinoleate and a phosphorus-containing solid flame retardant; and a coating layer 15 adhered to the foamed polyurethane layer 11 by a polyurethane hot melt adhesive 13 containing a polyurethane prepolymer (I) obtained by using a polyol component (A) and a polyisocyanate component (B) as raw materials, and a catalyst (II).

There is provided a urethane resin that is excellent in adhesive strength, and maintains high adhesive strength even after exposure to high temperature and humidity. A urethane resin obtained by reacting a glycol-modified aromatic hydrocarbon-formaldehyde resin (A) modified with a glycol with a polyisocyanate (B) having two or more free isocyanate groups in a molecule.

The present invention relates to a composition comprising the reaction product of a block copolymer based on OH-functional polyolefin which is unhydrogenated, preferably polybutadiene, and cyclic esters in the form of a polyol having at least 1.8, preferably at least two, OH groups and at least one isocyanate compound having at least two isocyanate groups, which is notable in that the composition includes at least 0.0001% to 40% by weight of titanium and has a content of free isocyanate groups of at least 0.1% by weight based on the overall composition, to a process for preparation thereof and to the use of the composition for bonding of substrates.

An epoxide resin for the manufacture of a fibre-reinforced composite material having fire retardant properties and/or for use as an adhesive or hot-melt adhesive having fire retardant properties, the epoxide resin being halogen-free and phenolic resin-free, the epoxide resin comprising: A. a mixture of (i) at least one first non-halogenated multifunctional epoxide-containing resin which has an epoxide functionality of greater than 2 and (ii) at least one second non-halogenated multifunctional epoxide-containing resin which has an epoxide functionality of less than or equal to 2; B. at least one catalyst for curing the mixture of epoxide-containing resins to form a cured epoxy resin; and C. at least one fire retardant additive for forming an intumescent char when the cured epoxy resin is exposed to a fire, wherein the at least one fire retardant additive comprises expandable flake graphite and wherein the expandable flake graphite is present in a concentration of from 0.09 to 2.5 wt % based on the weight of the epoxide resin.

In the present invention, there is provided a moisture-curable polyurethane hot-melt resin composition containing an urethane prepolymer (i) having an isocyanate group, which is a reaction product of a polyol (A) and a polyisocyanate (B), the polyol (A) comprising a polyester polyol (al) which uses a polybasic acid (x) derived from biomass and a glycol (y) derived from biomass as raw materials. Further, the present invention provides an adhesive containing the moisture-curable polyurethane hot-melt resin composition. The biomass-derived polybasic acid (x) is preferably sebacic acid and/or succinic acid. The biomass-derived glycol (y) is preferably 1,3-propanediol and/or 1,4-butanediol. The moisture-curable polyurethane resin composition preferably has a biomass degree of 40% or more.

Described herein is a polyurethane having an isocyanate group and having C—C double bonds on a side chain, a process for preparing such a polyurethane, and an UV-moisture dual cure polyurethane reactive hotmelt including the polyurethane.