A thin self-supporting adhesive film is claimed that includes a first polyurethane and a solid surface-deactivated isocyanate.

Disclosed are a polyurethane foam composition for sound-absorbing materials, a method for manufacturing a polyurethane foam and a polyurethane foam manufactured using the method. Particularly, disclosed are a composition containing a polyol mixture including a polyol and an additive, and isocyanate, and the manufacture of a low-density polyurethane foam for sound-absorbing materials, which is imparted with improved appearance formability, reduced smell and enhanced sound absorption performance by controlling the content of the composition and the conditions for foaming the composition.

Disclosed are a polyurethane foam composition for sound-absorbing materials, a method for manufacturing a polyurethane foam and a polyurethane foam manufactured using the method. Particularly, disclosed are a composition containing a polyol mixture including a polyol and an additive, and isocyanate, and the manufacture of a low-density polyurethane foam for sound-absorbing materials, which is imparted with improved appearance formability, reduced smell and enhanced sound absorption performance by controlling the content of the composition and the conditions for foaming the composition.

Application of a Mannich base in a flame-retardant polyurethane material is provided. The Mannich base has a structure represented by a formula (I). In the Mannich base, flame-retardant groups, i.e., halogens are introduced at the second, fourth and sixth positions of a phenyl group, and flame-retardant elements, i.e., halogens and nitrogen are introduced into synthesized polyether polyol, giving the synthesized polyether polyol good flame retardance. The amount of active hydrogen in the Mannich base is small so that occurrence of side reactions during the synthesis of the polyether polyol is reduced, and the viscosity of the flame-retardant polyether polyol is lowered. Due to autocatalytic performance of tertiary amido in the flame-retardant polyether polyol, use of a catalyst can be reduced and even avoided during the synthesis. A preparation method of the Mannich base is also provided.

Application of a Mannich base in a flame-retardant polyurethane material is provided. The Mannich base has a structure represented by a formula (I). In the Mannich base, flame-retardant groups, i.e., halogens are introduced at the second, fourth and sixth positions of a phenyl group, and flame-retardant elements, i.e., halogens and nitrogen are introduced into synthesized polyether polyol, giving the synthesized polyether polyol good flame retardance. The amount of active hydrogen in the Mannich base is small so that occurrence of side reactions during the synthesis of the polyether polyol is reduced, and the viscosity of the flame-retardant polyether polyol is lowered. Due to autocatalytic performance of tertiary amido in the flame-retardant polyether polyol, use of a catalyst can be reduced and even avoided during the synthesis. A preparation method of the Mannich base is also provided.

A process for producing a water-emulsifiable polyisocyanate formulation, in which, in a first process step,

(A) a dispersion-active reaction product (E) is prepared from at least one diisocyanate selected from the group of hexamethylene 1,6-diisocyanate, pentamethylene 1,5-diisocyanate, 4,4′-di(isocyanatocyclohexyl)methane, 1-isocyanato-3,3,5-trimethyl-5-(isocyanatomethyl)cyclohexane, tolylene 2,4- and 2,6-diisocyanate, tetramethylxylylene diisocyanate, p-xylylene diisocyanate, 2,4′- and 4,4′-diisocyanatodiphenylmethane, with at least one mono- or polyhydric polyalkylene ether alcohol having 2 to 4 carbon atoms in the alkylene groups that comprises a polymer chain having at least 8 ethylene oxide units, and the resultant reaction product (E), in a second process step,
(B) is mixed with at least one (cyclo)aliphatic polyisocyanate having an average NCO functionality of 2.2 to 5.0, preferably of 2.5 to 4.0,
wherein step (B) is performed in the presence of an allophanatization catalyst and the conditions are chosen such that (E) and the polyisocyanate form allophanate groups, characterized in that the allophanatization catalyst is at least one salt consisting of a metal cation and at least one dithiophosphate anion.

The present invention relates to an aqueous coating composition comprising polyurethane A and vinyl polymer, wherein the polyurethane A comprises as building blocks at least: (a) a polyisocyanate(s) containing at least two cyclic groups, (b) a non-cyclic aliphatic diisocyanate(s) whereby the non-cyclic aliphatic group connecting the two isocyanate groups has from 4 to 36 carbon atoms, and (c) a component(s) containing an isocyanate-reactive group(s), whereby the summed amount of (a) and (b) is 10 to 60 wt. %, relative to the total weight amount of components used to prepare the polyurethane A; and whereby the weight ratio between (a) and (b) is in the range from 50:50 to 99:1.

Methods of preparing waterborne polyurethane dispersions involving reacted units of a polyol, an acidic diol, a hydroxy functionalized polyhedral oligomeric silsesquioxane, a diisocyanate, and a chain extender. Polyurethane coatings based on these waterborne polyurethane dispersions are evaluated on their hydrophobicity (water contact angle), mechanical strength (e.g. tensile strength, Young's modulus, elongation at break), and antifouling properties.

The present invention relates to an aqueous coating composition comprising polyurethane A and vinyl polymer, wherein the polyurethane A comprising as building blocks at least: (a) a polyisocyanate(s) containing at least one cyclic group, (b) a non-cyclic aliphatic diisocyanate(s) whereby the non-cyclic aliphatic group connecting the two isocyanate groups has 5 carbon atoms, and (c) a component(s) containing an isocyanate-reactive group(s), whereby the summed amount of (a) and (b) is 10 to 60 wt. %, relative to the total weight amount of components used to prepare the polyurethane A; and whereby the weight ratio between (a) and (b) is in the range from 50:50 to 99:1.

The invention provides a unique thermoset viscoelastomeric reaction product and a container combination comprised of the supportive base equipped with a thermoset viscoelastomer reaction product possessing unexpectedly superior adhesive and cohesive efficacy rendering it especially useful as an adhesive insert in a container combination. The thermoset insert bonds to any suitable supportive structure. The unique viscoelastomeric reaction product inserts adhesively immobilize items placed thereupon and adhesively or permanently bonds to most conventional containers. The tenacious cohesive and adhesive features of the insert allows for inverted stowage of stowed items. Due to the confining adhesive and cohesive attributes of the insert, structural supports of a flexible or solid base without a conventional confining structure provide a unique container combination for the stowed items. Containers equipped with the unique insert also surprisingly provide an aseptic environment especially useful for hygienic applications.