摘要:
The present invention is directed to a method of producing an adherent coating over untreated thermoplastic and thermosetting resinous substrates from a coating composition that includes a crosslinkable component and a crosslinking component that are mixed prior to application and applied over the substrate. The crosslinkable component includes a polymeric mix containing at least one crosslinkable copolymer polymerized from a monomer mixture comprising one or more ethylenically unsaturated monomers having on average 1 to 10, preferably 1 to 4 and more preferably 1 to 2 hydroxyl groups and a saturated hydrocarbon polymer. The crosslinkable component includes one or more cycloaliphatic polyisocyanate of the formula: R1—(R2—NCO)n wherein R1 is a substituted or unsubstituted cycloaliphatic group, R2 is independently selected from a direct bond, a straight aliphatic group or branched aliphatic group, and wherein n ranges from 2 to 10. The method is well suited to produce adherent coatings on olefinic substrates such as those used in automotive and general commercial application without any pretreatment of the resinous substrates.
摘要:
Biopolymeric hydrogel precursors are prepared by means of a ring-opening polymerization of epoxidized vegetable oils, followed by chemical hydrolysis. The recovered hydrogels having properties similar to Pluronic® type surfactants would have a plurality of end-use applications, including use as food additives and pharmaceutical ingredients. This invention provides the potential for an enhanced market for vegetable oils, and particularly for soybean oil.
摘要:
The object of the present invention is to provide a particle for medical use which has an excellent capability of fixing a biologically active substance and such a chemical/physical stability that the particle is less dissolved or deteriorated in a washing step, and a particle for analysis which has an excellent capability of capturing a biomolecule and such a chemical/physical stability that the particle is less dissolved or deteriorated in a washing step.The object of the present invention is achieved by a particle for medical use which has on the surface thereof a polymer-containing layer formed by introducing a polymerizable functional group or a chain-transfer group to the surface of a core particle, mixing the resultant particle with a polymerizable component containing a polymerizable monomer having a functional group for fixing a biologically active substance, and causing the mixture to develop polymerization reaction The object of the present invention is also achieved by a particle for analysis of the interaction of biomolecules, which particle having on the surface thereof a polymer-containing layer formed by introducing a polymerizable functional group or a chain-transfer group to the surface of a core particle, mixing the resultant particle with a polymerizable component containing a polymerizable monomer having a functional group for fixing a biologically active substance, and causing the mixture to develop, polymerization reaction, wherein the biologically active substance is fixed through the functional group for fixing a biologically active substance in the polymer-containing layer.
摘要:
Provided is a rubber composition blended with an inorganic filler, the rubber composition having an improved dispersibility of the inorganic filler, as well as improved low heat generation property and tensile stress. The rubber composition includes a blend of: 100 parts by weight of a diene rubber; 1 to 150 parts by weight of an inorganic filler; and to 30 parts by weight of a copolymer composed of a segment composed of a polyamide polymer and a segment composed of a diene polymer. The segment composed of the diene polymer has a number average molecular weight of not less than 10000.
摘要:
The present invention relates to a stable storable composition for the chemical grafting of at least one filler comprising a hydroxyl group, onto a polymer. The composition according to the invention comprises at least one organic carboxylic acid comprising a carbon/carbon double bond that forms a resonance structure with the carbon/oxygen double bond of the carboxyl group, said composition being characterized in that it comprises a dispersing agent of the polyethylene oxide-based block polymer or copolymer type. The invention also relates to a process for chemical grafting of an organic acid onto a filler comprising at least one hydroxyl group, using said composition, so as to obtain a polymerizable liquid mixture.
摘要:
The liquid, uncrosslinked, UV-curable Michael addition resins and blends of the present invention exhibit performance properties that make them very effective coating materials and these properties can be modified greatly depending upon composition. Michael donors and acceptors can be constructed from Type I and/or Type II photoinitiators and can be included in the coating compositions disclosed to make UV-curable coatings with extraordinary photoreactivity and properties. Resins can be produced that show excellent adhesion to metals, plastics, wood, paper and glass. They exhibit wide ranges of hardness, toughness, flexibility, tensile strength, stain resistance, scratch resistance, impact resistance, solvent resistance, etc. Almost any desired coating performance parameter can be attained by proper selection of raw material building blocks.
摘要:
This method comprises a primary cross-linking step wherein cross-linked polylactic acid is formed by cross-linking a polylactic acid molded product; an impregnation step wherein the cross-linked polylactic acid obtained in the primary cross-linking step is immersed in an impregnant at a temperature that is not lower than the glass transition temperature of polylactic acid and not higher than the melting point of polylactic acid; and a cooling step wherein the cross-linked polylactic acid, which is in the swollen state because of the impregnation of the impregnant, is cooled to temperatures equal to or lower than the glass transition temperature of polylactic acid. This method may further comprise a secondary cross-linking step following the cooling step.
摘要:
A resin composition comprising a polylactic acid-based resin (A) and methacrylic resins (B), wherein the methacrylic resins having at least (a) a difference of 10° C. or more in glass transition temperature or (b) a difference of 3% or more in syndiotacticity; it is preferred that at least one of the methacrylic resins (B) is a methacrylic resin having a weight average molecular weight of 50,000 to 450,000, a glass transition temperature of 110° C. or higher and a syndiotacticity of 40% or more, and that the resin composition further contains a multilayer structure polymer formed as particles each consisting of a core layer and one or more shell layers covering it (C) A molded article made of said resin composition.
摘要:
The present invention refers to segment copolymers comprising segments “A” having polyvinylpyrrolidone (PVP) structure and segments “B” having a polyester 5 structure and the process for their preparation and their use.
摘要:
The invention detailed herein comprises a family of radiation-curable coating formulations specifically for metal substrates. These coating formulations are based on multifunctional acrylate resins formed by the reaction of acrylate monomers and oligomers with ÿ-keto esters (e.g., acetoacetates), ÿ-diketones (e.g., 2, 4-pentanedione), ÿ-keto amides (e.g., acetoacetanilide, acetoacetamide), and/or other ÿ-dicarbonyl compounds that can participate in the Michael addition reaction. An essential novelty of these coating resins is that they will cure under standard UV-cure conditions without the addition of traditional photoinitiators. Other materials, both reactive (conventional acrylates) and non-reactive (e.g., solvents) may also be incorporated into the resin oligomers to enhance the coatings properties on metal substrates. These materials include a variety of acrylic monomers and oligomers, primary, secondary and tertiary amines, acid-functional monomers and oligomers, silicones, waxes and elastomers, among others. Coatings based on these novel multifunctional acrylate resins exhibit excellent adhesion and shrinkage control, flexibility, solvent resistance, scratch and mar resistance, impact resistance, color, and durability across a wide range of plastic materials. These coatings may be cured via chemical means, thermally, or by exposure to UV or electron beam radiation.