Abstract:
The mechanical properties of urea formaldehyde resins may be improved by incorporating therein polyvinyl alcohol. The polyvinyl alcohol may be incorporated during pre-mixing, mid mixing, and/or post mixing of the resin components. Resins prepared using polyvinyl alcohol are particularly desirable in articles requiring improved mechanical strength and water resistance, as compared to similar resins prepared without the polyvinyl alcohol such as shingles.
Abstract:
Copolymers comprising ethylene, vinyl esters, in particular vinyl acetate and esters of (meth)acrylic acid, selected from esters comprising branched alkyl, cyclic alkyl or optionally alkyl substituted aryl moieties and having a weight average molecular weight of 35,000 g/mol to 150,000 g/mol, formulations of such copolymers in organic solvents and their use as pour point depressant, wax inhibitor and flow enhancer for crude oils.
Abstract:
Disclosed are solutions of polyvinylidene fluoride (PVDF) or copolymers of 1,1-difluoroethene in a solvent containing N-formylmorpholine (NFM), N-acetylmorpholine (NAM) or mixtures thereof and an additional co-solvent selected from among alkylene carbonate, mono-, di- or polyalkylene glycol dialkyl ether or mixtures thereof.
Abstract:
An organic vehicle for dispensing glass or ceramic powder comprising an acrylic resin component and an organic solvent. A sealing glass composition comprising glass or ceramic particles and the organic vehicle of the invention. A method of applying a sealing glass composition to a substrate comprising the steps of providing a metal substrate, providing a supporting sheet having a front surface coated with a releasing agent, depositing a sealing glass composition of the invention onto said front surface of said releasable sheet, drying said sealing glass composition to form a sealing glass composition decal, removing said sealing glass composition decal from said front surface of said supporting sheet, and placing said dried sealing glass composition decal onto a metal substrate.
Abstract:
Provided are: a flame resistant polymer which is obtained by reacting polyacrylonitrile with amine and nitro compounds, the polyacrylonitrile being polymerized by aqueous suspension polymerization using a redox initiator and containing an S component at an amount of 3,000 µg/g or less; a polymer solution using the polymer; a flame resistant fiber using the polymer solution; a carbon fiber using the flame resistant fiber; and methods for producing the same. A PAN-based polymer in which both yarn producing properties and flame resistance are improved can be realized. Also provided are a polymer solution which is suitable for spinning using the polymer and a method for producing the same, a desirable flame resistant fiber using the polymer solution and a method for producing the same, and a desirable carbon fiber using the flame resistant fiber and a method for producing the same.
Abstract:
Disclosed is a method for preparing stably dispersed cellulose nanofibers. The method comprises following steps: 1) mixing cellulose and an organic solvent, the percentage of the cellulose being 1% to 15% in weight; 2) adding an esterification agent into the resultant mixture of step 1), the molar ratio of the esterification agent to the cellulose being from 1: 0.1 to 4; 3) physically breaking the resultant mixture of step 2) until a suspension liquid with stably dispersed cellulose nanofibers of 2-1000 nm in diameter and 100-100 µm in length is obtained, an esterification reaction of hydroxyl group(s) on the surface of cellulose fibers being occurring at the meantime of the breaking. Since the surface of the cellulose nanofibers with the esterified surface is hydrophobized by alkyl molecular chains, the dispersant solvent may be DMF, or may be replaced by other solvents. Moreover, when recombining the cellulose nanofibers of the invention with the synthetic resins, compatibility of the cellulose nanofibers to the matrix is better than that of the untreated cellulose, and thus the strength of the composite material may be improved.
Abstract:
Disclosed is a method for preparing stably dispersed cellulose nanofibers. The method comprises following steps: 1) mixing cellulose and an organic solvent, the percentage of the cellulose being 1% to 15% in weight; 2) adding an esterification agent into the resultant mixture of step 1), the molar ratio of the esterification agent to the cellulose being from 1: 0.1 to 4; 3) physically breaking the resultant mixture of step 2) until a suspension liquid with stably dispersed cellulose nanofibers of 2-1000 nm in diameter and 100-100 µm in length is obtained, an esterification reaction of hydroxyl group(s) on the surface of cellulose fibers being occurring at the meantime of the breaking. Since the surface of the cellulose nanofibers with the esterified surface is hydrophobized by alkyl molecular chains, the dispersant solvent may be DMF, or may be replaced by other solvents. Moreover, when recombining the cellulose nanofibers of the invention with the synthetic resins, compatibility of the cellulose nanofibers to the matrix is better than that of the untreated cellulose, and thus the strength of the composite material may be improved.
Abstract:
A dispersion of a conductive polymer and a polyanion in a non-aquoues medium further comprising a compound having an acid sensitive functional group selected from the group consisting of a ketal, an acetal, an aminal, a hemi-ketal, a hemi-acetal, a hemi-aminal, a thioacetal, an amide acetal, an orthoester, an orthoether, an enolester, an enolether, and an enolamine. The dispersion is applied on a substrate for an electronic device.
Abstract:
Beschrieben wird eine nicht-wässrige Antidröhnmasse, enthaltend (a) ein nicht-pulverförmiges Polyacrylatbindemittel mit einem K-Wert im Bereich von 10 bis 35, gemessen als 1%ige Lösung in Tetrahydrofuran; (b) anorganische Füllstoffe; und eine radikalisch polymerisierbare Verbindung, welche mindestens eine radikalisch polymerisierbare C-C-Doppelbindung aufweist und einen Siedepunkt bei Normaldruck von größer 160°C besitzt. Beschrieben wird auch ein Verfahren zur Dämpfung von Vibrationen oder Schwingungen von Bauteilen von Fahrzeugen und Maschinen unter Verwendung der erfindungsgemäßen Antidröhnmasse.
Abstract:
A solvent composition and method for making same is disclosed having a composition between 26 to 90 weight percent propionate, butyrate, or combination thereof and between 10 to 74 weight percent fluorinated solvent blend, wherein the fluorinated solvent blend includes t-DCE. A polymer solvent system is also disclosed incorporating the solvent composition and dissolved polymers, such as SEBS polymers. The solvent composition and polymer solvent system is minimally combustible or preferably nonflammable.