A crystalline non-reinforced thermoplastic polyurethane composition having a high flexural modulus comprises 5% to 25% of a hydroxyl-functional polyol intermediate having a weight average molecular weight of 250 to 3000 and 75% to 95% hard segment comprising an unbranched, unsubstituted, linear chain diol and an aromatic isocyanate.

Liquid crystalline hydroquinone-3,4-biphenyl dicarboxylate polyesters, and methods of making them. The polyesters may be melt processed at a temperature below the thermal decomposition temperature and the isotropic temperature, and may form a liquid crystalline glass phase. The polyesters may be formed by polycondensation of hydroquinone or a hydroquinone derivative with 3,4-biphenyl dicarboxylic acid.

Liquid crystalline hydroquinone-3,4-biphenyl dicarboxylate polyesters, and methods of making them. The polyesters may be melt processed at a temperature below the thermal decomposition temperature and the isotropic temperature, and may form a liquid crystalline glass phase. The polyesters may be formed by polycondensation of hydroquinone or a hydroquinone derivative with 3,4-biphenyl dicarboxylic acid.

The present invention relates to a process for continuous production of partly crystalline polycondensate pellet material, comprising the steps of forming a polycondensate melt into pellet material; separating the liquid cooling medium from the pellet material in a first treatment space, wherein the pellets after exit from the first treatment space exhibit a temperature T.sub.GR, and crystallizing the pellet material in a second treatment space, wherein in the second treatment space fluidized bed conditions exist, and in the second treatment space the pellets are heated by supply of energy from the exterior by means of a process gas.

An object of the present invention is to provide a liquid crystal polyester resin having low-temperature processability and improved mechanical properties. The present invention relates to a liquid crystal polyester resin comprising specific repeating units and having a crystal melting temperature of less than 210 C. as measured with a differential scanning calorimeter.

One purpose of the present invention is to provide a liquid-crystal compound which exhibits liquid crystallinity at low temperatures. Another purpose of the present invention is to provide a thermally responsive material which exhibits liquid crystallinity and rubber elasticity at low temperatures (around room temperature) ever, though a large amount of a liquid-crystal compound is contained therein, and a method for producing this thermally responsive material. A liquid-crystal compound according to the present invention is obtained by adding an alkylene oxide and/or styrene oxide to a mesogenic group-containing compound that has an active hydrogen group.

A resin is provided, wherein the resin is formed by reacting 1 part by mole of a multi-isocyanate core with 3 to 4.5 parts by mole of diol to form an intermediate, and then reacting the intermediate with 3 to 4.5 parts by mole of first diisocyanate. The multi-isocyanate core can be a multi-isocyanate compound with more than two isocyanate groups. Alternatively, the multi-isocyanate core can be formed by reacting a second diisocyanate with a multi-hydroxy compound, and the multi-hydroxy compound has more than two hydroxy groups.

A liquid crystalline polyester resin composition contains 10-45 parts by weight of a surface-hydrophobized spherical silica (B) with respect to 100 parts by weight of a liquid crystalline polyester res-in (A); and a molded article obtained from the liquid crystalline polyester resin composition. The liquid crystalline polyester resin composition may also contain 1 to 2.5 parts by weight of an ethylene/glycidyl methacrylate copolymer (C) with respect to 100 parts by weight of a resin composition consisting of the liquid crystalline polyester resin (A) and the surface-hydrophobized spherical silica (B). The liquid crystalline polyester resin composition has excellent sliding characteristic, adhesive characteristic and impact durability; and a molded product obtained from the liquid crystalline polyester resin composition.

The present invention relates to an aqueous dispersion at least containing (A) at least one polyurethane, (B) at least one fresh sol and (C) optionally further additives, wherein the at least one polyurethane is anionically hydrophilized, to a process for producing the dispersion, to the use of the dispersion for producing an adhesive composition, to a corresponding adhesive composition, to an adhesive laminate containing at least one substrate bonded with this adhesive composition, to a process for producing an adhesive laminate and to the use of a fresh sol for achieving a thickening effect in an aqueous polyurethane dispersion.

An object of the present invention is to provide a multilayer container in which yellowing of a regenerated polyester at the time of recycle is suppressed. Furthermore, another object of the present invention is to provide a method for producing a regenerated polyester from the aforementioned multilayer container. The multilayer container of the present invention includes a polyester resin composition layer containing a polyester resin (X) and an antioxidant; and a polyamide resin composition layer containing a polyamide resin (Y) and a cobalt salt, wherein the polyamide resin (Y) has a structural unit derived from a diamine and a structural unit derived from a dicarboxylic acid; 50 mol % or more of the structural unit derived from a diamine is a structural unit derived from xylylenediamine; the content of the antioxidant in the polyester resin composition layer is 0.01 to 1% by mass; and the content of the cobalt salt in the polyamide resin composition layer is 100 to 1,000 ppm as expressed in terms of cobalt.