A urea resin composition capable of providing a polyurea foam exhibiting excellent flame retardancy and shape retention during combustion, capable of suppressing deterioration over time in a wet-heat environment, exhibiting excellent adhesion to an adherend during coating, being hardly cracked even if flame contact occurs, and hardly allowing carbonization to proceed to a deep portion of the foam. A urea resin composition comprising a polyisocyanate compound (A), a polyamine compound (B), a trimerization catalyst, a foaming agent, a foam stabilizer, and a flame retardant.

A polyurethane adhesive and a mixture used for manufacturing a plastic athletic track are provided. The polyurethane adhesive includes a urethane pre-polymer which is formed by a reaction between an isocyanate and a polyol. The polyol is selected from the group consisting of polyether polyol and polybutadiene polyol, and a number average molecular weight of the polyol is between 1,000 g/mole and 6,000 g/mole. Based on the total weight of the polyurethane adhesive, a content of the urethane pre-polymer is between 80 wt % and 99.5 wt %, and a viscosity of the polyurethane adhesive is between 1,000 cps and 3,000 cps under an environmental temperature of between 15° C. and 40° C.

A polyurethane adhesive and a mixture used for manufacturing a plastic athletic track are provided. The polyurethane adhesive includes a urethane pre-polymer which is formed by a reaction between an isocyanate and a polyol. The polyol is selected from the group consisting of polyether polyol and polybutadiene polyol, and a number average molecular weight of the polyol is between 1,000 g/mole and 6,000 g/mole. Based on the total weight of the polyurethane adhesive, a content of the urethane pre-polymer is between 80 wt % and 99.5 wt %, and a viscosity of the polyurethane adhesive is between 1,000 cps and 3,000 cps under an environmental temperature of between 15° C. and 40° C.

The present invention relates to a curable composition containing (A) a side chain-containing cyclic molecule in which three or more side chains each having a polymerizable functional group introduced at a terminal are introduced ((A) cyclic polyfunctional monomer), and (B) a polymerizable monomer having a polymerizable functional group polymerizable with the side chain-containing cyclic molecule ((B) another polymerizable monomer). The present invention provides a curable composition from which a cured article having high abrasion resistance and enabling exhibition of excellent mechanical properties and photochromic properties is obtained. In particular, the present invention can provide a curable composition from which a cured article suitable for use as a polishing pad or a photochromic spectacle lens can be obtained.

A method can be used for manufacturing one or more bodies made of a porous material derived from precursors of the porous material in a sol-gel process. The method involves filling precursors of the porous material into a mold defining the shape of the body, where the precursors include at least two reactive components and a solvent, and forming a gel body. The step is then repeated so as to form several gel bodies. The gel bodies are then removed from the mold after a predetermined time in which the gel bodies are formed from the precursors of the porous material. The gel bodies are arranged adjacent to one another, a spacer is provided between two adjacent gel bodies so as to provide a clearance therebetween, and the solvent is then removed from the gel bodies.

Disclosed are polymer polyol compositions that include an amino diphenylamine, optionally in combination with other antioxidants, such as phenolic antioxidants, as well the use of such polymer polyol compositions in the production of flexible polyurethane foams. The polyurethane foam includes a reaction product of a polyisocyanate component and an isocyanate-reactive component that includes the polymer polyol composition.

Polymerizable compositions suitable for use for 3D printed (e.g. orthodontic) articles, especially orthodontic alignment trays, are described. The polymerizable composition comprises a) 30-70 parts by weight of (meth)acrylate monomer(s); and b) urethane (meth)acrylate polymer; wherein the reaction product comprises at least 1 wt. % polymerized units of a multifunctional compound comprising pendent cyclic moieties. The orthodontic article comprises the reaction product of a polymerizable composition as described herein. The urethane (meth)acrylate polymer typically comprises polymerized units of a multifunctional compound comprising pendent cyclic moieties and/or at least one (meth)acrylate monomer comprises polymerized units of a multifunctional compound comprising pendent cyclic moieties. Also described are methods of making an article, non-transitory machine-readable medium comprising data representing a three-dimensional model of an article, and systems.

The present invention provides a solution-processable self-healing hydrolytically stable elastomer, a method for the preparation thereof, and articles of manufacture comprising the elastomer. The elastomer comprises polymeric chains comprising units of formula (A1), wherein R is a polybutadiene-containing polyurethane; R.sub.1 and R.sub.1′ are independently selected from the group consisting of: —H, (C.sub.1-C.sub.20)alkyl, (C.sub.5-C.sub.14)aryl, —OR.sub.4, —(CO)R.sub.5, —O(CO)R.sub.6, —(SO)R.sub.7, CO—R.sub.8, —COOR.sub.9, —NO.sub.2, and halogen; R.sub.2, R.sub.2′, R.sub.3 and R.sub.3′ are independently selected from the group consisting of: —H, (C.sub.1-C.sub.20)alkyl, and (C.sub.5-C.sub.14)aryl; R.sub.4 to R.sub.9 are the same or different, and are independently selected from the group consisting of: —H, (C.sub.1-C.sub.20)alkyl, and (C.sub.5-C.sub.14)aryl; m is 4; wherein the elastomer is dynamically crosslinked by aromatic disulfide metathesis, and wherein the elastomer has a water contact angle of above 100 #.

##STR00001##

The present invention provides a solution-processable self-healing hydrolytically stable elastomer, a method for the preparation thereof, and articles of manufacture comprising the elastomer. The elastomer comprises polymeric chains comprising units of formula (A1), wherein R is a polybutadiene-containing polyurethane; R.sub.1 and R.sub.1′ are independently selected from the group consisting of: —H, (C.sub.1-C.sub.20)alkyl, (C.sub.5-C.sub.14)aryl, —OR.sub.4, —(CO)R.sub.5, —O(CO)R.sub.6, —(SO)R.sub.7, CO—R.sub.8, —COOR.sub.9, —NO.sub.2, and halogen; R.sub.2, R.sub.2′, R.sub.3 and R.sub.3′ are independently selected from the group consisting of: —H, (C.sub.1-C.sub.20)alkyl, and (C.sub.5-C.sub.14)aryl; R.sub.4 to R.sub.9 are the same or different, and are independently selected from the group consisting of: —H, (C.sub.1-C.sub.20)alkyl, and (C.sub.5-C.sub.14)aryl; m is 4; wherein the elastomer is dynamically crosslinked by aromatic disulfide metathesis, and wherein the elastomer has a water contact angle of above 100 #.

##STR00001##

A primer-attached thermoplastic resin material having a thermoplastic resin material and one or plural primer layers laminated on the thermoplastic resin material, wherein at least one layer of the primer layers is an in-situ polymerizable composition layer of an in-situ polymerizable composition polymerized on the thermoplastic resin material.