Abstract: Disclosed is a method for preparing a soft, water blown, polyurethane foam product, or microcellular elastomer using a stable, liquid, tertiary amine and tin-free polyurethane catalyst. The catalyst contains a combination of bismuth and sodium carboxylates.

Abstract: Polymers useful for imparting flame resistance to fibers and textiles are provided herein. The polymers are water-soluble, phosphine oxide-containing polymers that may be reaction products of hydroxymethyl phosphonium salts or hydroxymethyl phosphines with linking monomers, wherein at least 20% of the phosphorous atoms of the polymer are present as phosphine oxides. Formulations including the polymers and methods of using the polymers to impart flame resistance to fibers and textiles are also disclosed.

Abstract: A method of defoaming a system subject to foaming by using a defoamer composition is disclosed. The defoamer composition contains (a) 80 to 100 wt. % of a decarboxylated rosin acid (DCR) having a density of 0.9 to 1.0 g/cm3, a flash point of 135 to 175° C., an acid value of <50 mg KOH/g, measured according to ASTM D465, and a viscosity of 15 to 60 cSt at 40° C., measured according to ASTM D-445; and (b) 0 to 20 wt. % based on total weight of the defoamer composition of at least one component selected from the group consisting of nanoparticles, surfactants, hydrophobic compounds, and mixtures thereof. The defoamer composition is very effective in controlling unwanted foam formation or reduce already formed foam in the system.

Abstract: The present disclosure provides compositions and methods including modular material controllers that combine amplification with logic, translation of input signals, and response tuning to directly and precisely program dramatic material size changes. In particular, the present disclosure provides locked gels having a polymer with a nucleic acid cross link and a nucleic acid lock in a locked conformation preventing the locked gel from reacting with other nucleic acid sequences and methods of unlocking the locked gels by adding a nucleic acid key to the locked gel or by changing an inactive nucleic acid key into an active nucleic acid key with a trigger.

Abstract: A waterborne resin crosslinking agent containing a predetermined polycarbodiimide compound (A) having an oxyalkylene group, a predetermined polycarbodiimide compound (B), and a surfactant (C), each polycarbodiimide compound has a structure in which an isocyanate group is capped with a predetermined end-capping compound at each of both terminals, a total content of the oxyalkylene group in (A) is 15% by mass or more, a total content of the oxyalkylene group in (A) and (B) based on a total amount of (A) and (B) is 10% by mass or less, and a content of (C) is 0.1 to 20 parts by mass based on a total content of (A) and (B) of 100 parts by mass.

Abstract: Compositions are described for protecting a metal surface against corrosion. The composition includes a corrosion-inhibiting particle. The corrosion inhibiting particle may be usable in an epoxy resin-based coating or an olefin resin-based coating. The particle may include a core and a protectant. The core may include a water soluble corrosion inhibitor. The protectant may be disposed on at least a portion of a surface of the core and may be covalently or ionically bonded to a thiol group of the corrosion inhibitor. The protectant may be configured to reduce reaction between the core and the epoxy resin or the olefin resin. Methods of making the compositions are also disclosed.

Abstract: A two-component adhesive composition is provided. The two-component adhesive composition comprises an isocyanate component, an isocyanate-reactive component and an polyether amine-epoxy silane adduct, and can achieve superior adhesion strength between the adhesive and a substrate like metal alloy substrate. A laminated article prepared with said composition, a method for preparing the article and the use of the polyether amine-epoxy silane adduct as adhesion promoter in a two-component polyurethane adhesive composition are also provided.

Abstract: Provided is a cushion partially or entirely composed of a foam, wherein the foam is composed of: a hydrocarbon-based oil including ethylene and ?-olefin as constituent units; and a polymer composition including one or a plurality of polymers.

Abstract: The invention relates to a two-component polyurethane adhesive, in particular for laminating films, wherein the PU adhesive, based on the total weight of the laminating adhesive composition, (a) contains as resin component at least one NCO-terminated polyurethane pre-polymer having a content, based on the total weight of the resin component, of at least 40 wt % of diphenylmethanedi-isocyanate (MDI), wherein the MDI is 4,4?-diphenylmethanediisocyanate or a mixture thereof with 2,4?-diphenylmethanediisocyanate, and 2 to 20 wt % of polyglycol having a molecular weight Mw of 200 to <1000 g per mol, and (b) contains as hardener component a polyol mixture comprising 2, 3, or more different polyols and is free of polyesters. The invention further relates to the use of the adhesive for bonding films, to methods for producing composite films, and to composite films bonded with the adhesive described.

Abstract: A construction component comprising a foamed cellular board comprising smooth exterior surfaces separated by a cellular network and cut edges, and sealed caps adhered to the cut edges on the foamed cellular boar. The board has a density of less than 0.55 g/cm3, and the cut edges on which the sealed caps are adhered are unmelted edges.

Abstract: The present disclosure discloses a method for preparing dual-sensitive cellulose-based aerogel. The DAC (Dialdehyde cellulose), the DAC/PDMAEMA (poly-2-(dimethylamino)ethyl methacrylate) copolymer, the DAC/PDMAEMA/PEI (Polyethylenimine) copolymer are serially prepared, was freeze-dried to obtain a product. The product is the dual-sensitive cellulose-based aerogel, a cumulative adsorption capacity of the dual-sensitive cellulose-based aerogel is 250 mg/g, and a cumulative release amount of the dual-sensitive cellulose-based aerogel in 0.05 mol/L NaH2PO4 (pH=3-8), 0.2% NaCl (pH<3), or NaOH (pH>8) is 63-90%.

Abstract: Contact adhesive compositions comprising polychloroprene and, based on the polychloroprene content, 10 to 99 wt % of ethylene-vinyl acetate copolymer exhibit outstanding adhesion to substrates such as ethylene-vinyl acetate copolymers, thermoplastic elastomers or flexible PVC. The contact adhesive compositions of the invention are especially suitable for use in the bonding of articles, preferably articles in which at least part of the articles to be bonded consists of polyurethane, flexible PVC, ethylene-vinyl acetate copolymers and/or thermoplastic elastomers. This allows the adhesive composition to be employed widely in the footwear industry, for the bonding of roofing membranes containing flexible PVC, ethylene-propylene-diene rubber (EPDM) and/or ethylene-vinyl acetate copolymers, or for the bonding of synthetic leather based on flexible PVC.

Abstract: The present disclosure provides a PVC or CPVC solvent cement and a composition for forming a PVC or CPVC coating on an object. The solvent cement and the coating composition each include one or more caprolactam-derived solvents and a polymer selected from the group of polyvinyl chloride and chlorinated polyvinyl chloride. The one or more caprolactam-derived solvents include a linear alkyl group of 1, 2 or 4 unsubstituted carbons or an alkoxymethyl group of 2 or 3 unsubstituted carbons bonded to a nitrogen heteroatom.

Abstract: Disclosed herein are embodiments of a silicone-based foam material and composition and method embodiments for making the same. Also disclosed are embodiments of a silicon-based material that can be formed from the silicone-based foam material, as well as methods for making the same.

Abstract: A surfactant of formula (I): A-(L1)a-(C2)b-(L2)c-X??(I) wherein A is a perfluoropolyether; L1 is CONR', wherein R? is selected from H and C1-6 alkyl; a is 0 or 1; b is 0 or an integer between 1 and 10; L2 is a linking group; c is 0 or 1; and X is a charged group.

Abstract: The disclosed method relates to a method of recycling high relative viscosity nylon. The process involves melting a base polyamide with a dry blended mixture of dicarboxylic acid and a second polyamide. The disclosed method provides a process of controlling the relative viscosity of the combined polyamides and, in various aspects, the second polyamide may be nylon plop or other polyamide having high relative viscosity.

Abstract: A hydrogel of which the degradation is accurately controlled can be provided by a photodegradable hydrogel production method, the method comprising the steps of: reacting ?-glucan having a weight average molecular weight of 2000 to 200,000 with a compound represented by formula I to introduce a group represented by formula II into the ?-glucan; oxidizing the ?-glucan having, introduced therein, the group represented by formula II with periodic acid or a periodate salt to introduce an aldehyde group into the ?-glucan; and adding aminated carrageenan gel beads having polydopamine particles embedded therein to a gelling agent which has been prepared by introducing a group represented by formula II and an aldehyde group into ?-glucan, and then causing the crosslinking reaction of the resultant product with a polythiol-type reducing agent to form the hydrogel.

Abstract: Tumor resection is commonly practiced to prevent the progression of cancer. However, there are post-surgery concerns including the formation of a void that can allow cancer cells to escape at the surgery site, which increases the risk of metastasis. To counter this challenge, an embodiment includes a polyurethane-based shape memory foam as a tissue void-filling device that can also release anti-cancer drugs. Such foams may activate at body temperature and become malleable. Such properties may enable the foam to be shaped to precisely seal the tissue void and then serve as a drug-eluting device. Based on the drug composition with poly vinyl alcohol (PVA), the drug release profile from the foam may be altered depending on the application.

Abstract: A cation-exchange membrane includes layer (I) containing repeating units (A) each represented by formula (1) and repeating units (S) each containing a sulfonic acid-type ion-exchange group, wherein the mass proportion of repeating units (A) based on the total mass proportion of repeating units (A) and repeating units (S) being 100% by mass is 53% by mass or more and 70% by mass or less; and layer (II) containing a fluorine-containing polymer containing a carboxylic acid-type ion-exchange group and disposed on layer (I), wherein the water content of layer (I) is 26% or more and 35% or less: CF2—CF2??(1)

Abstract: An acrylic resin powder soluble in acetone, including a multi-stage polymer (M) that includes a polymer (B) obtained by polymerizing a monomer mixture (b) containing methyl methacrylate and an alkyl (meth)acrylate ester (mb) in the presence of a polymer dispersion that contains a polymer (A) obtained by polymerizing a monomer mixture (a) containing an alkyl (meth)acrylate ester (ma), in which an alkyl group in the alkyl (meth)acrylate ester (ma) has 4 to 8 carbon atoms, an alkyl group in the alkyl (meth)acrylate ester (mb) has 4 to 8 carbon atoms, a glass transition temperature of the polymer (A) is 20° C. or lower, a glass transition temperature of the polymer (B) obtained by polymerizing the monomer mixture (b) is 55° C. or higher, and a mass average molecular weight of the multi-stage polymer (M) is 10,000 or more and 300,000 or less.