66 results about "Telechelic polymer" patented technology

Disclosed is a method of preparing terminally functionalized telechelic polymers using a cationic living polymer product or a terminal tert-chloride chain end of a carbocationic quasiliving polymer product, which comprises quenching the polymer product with an N-substituted pyrrole to thereby functionalize the N-substituted pyrrole at the terminal reactive polymer chain end(s). Also disclosed are the terminal functionalized polyisobuyl N-substituted pyrrole compounds where the polyisobutyl group is substituted at the 2 and 3 position of the N-substituted pyrrole.

Amphiphilic telechelics incorporating polyhedraloligosilsesquioxane (POSS) synthesized by direct urethane linkage between the diol end groups of polyethylene glycol (PEG) homopolymers and the monoisocyanate group of POSS macromers. The hydrophobicity of the amphiphilic telechelics can be varied by using PEG homopolymers of increasing MW, providing for control over molecular architecture by hydrophilic/hydrophobic balance. Methods for synthesizing the amphiphilic telechelics and their use as surfactants, thickening agents, additives to plastic such as PMMA′(Plexiglass), epoxyadhesives for improving their properties are also disclosed.

Golf balls comprising thermoplastic, thermoset, castable, or millable elastomer compositions are presently disclosed. These elastomer compositions comprise reaction products of polyisocyanates and telechelic polymers having isocyanate-reactive end-groups such as hydroxyl groups and/or amine groups. These elastomer compositions can be used in any one or more portions of the golf balls, such as inner center, core, inner core layer, intermediate core layer, outer core layer, intermediate layer, cover, inner cover layer, intermediate cover layer, and/or outer cover layer.

The invention relates to a preparation method of a functional telechelic polymer with controllable double-bond content of a main chain, and particularly relates to a preparation method of a telechelic polymer with terminal hydroxyl. The preparation method is characterized in that double bonds on a molecule main chain of hydroxyl-terminated polybutadiene are hydrogenated by using trisrhodium chloride, and then through condition control, a telechelic polymer with controllable double-bond content of the main chain is obtained; the hydroxyl-terminated polybutadiene is dissolved in dimethylbenzene in a proportion of 12.5-50%, and then reaction is carried out for 2-10 h under the conditions that the pressure is 0.5-3.0 MPa and the temperature is 70-150 DEG C, wherein the application amount of a catalyst is 0.5-1.5%, and the application amount of triphenylphosphine is 1-4 times as large as that of the catalyst. The preparation method disclosed by the invention has the advantages that a controllable double-bond containing functional telechelic polymer is prepared by using a hydrogenation and modification method, and the method has a main advantage that the double-bond content of a molecule chain of the functional telechelic polymer can be controlled as required through changing experiment conditions.

The invention belongs to the technical field of photosensitive resin materials for 3D printing, and discloses a 3D printing photosensitive resin material containing modified butadiene rubber. The 3D printing photosensitive resin material containing the modified butadiene rubber is prepared from, by mass, 10%-30% of the modified butadiene rubber, 30%-80% of acrylic resin, 10%-40% of diluents, 1%-2% of initiators and 1%-2% of accelerants. A polybutadiene telechelic polymer with a terminal hydroxyl group is obtained through anionic polymerization, esterification is conducted on the polybutadiene telechelic polymer and acrylic acid, and a double-bond group is introduced; the 3D printing photosensitive resin material containing the modified butadiene rubber has the advantages that by means of an anion synthetic method, a polymer with the molecular weight narrower in distribution is obtained, processing is facilitated, a ubiquitous brittleness problem is effectively solved by introducing a rubber chain segment, and after esterification is conducted on the acrylic acid which is one of original systems of the photosensitive resin and double bonds are introduced, the compatibility problem is thoroughly solved. The invention further provides a preparation method of the 3D printing photosensitive resin material containing the modified butadiene rubber.

Telechelic polymers having two reactive functional groups at the same polymer chain end are disclosed. These polymers can be prepared by combining a cycloborane initiator, at least one free radical polymerizable monomer and oxygen to form a polymer segment having a borane residue at one end of the polymer segment resulting from the cycloborane initiator; and converting the borane residue to at least two functional groups to form the telechelic polymer.

A method for forming a fuel cell component includes the steps of providing a two-part sealant having a first part comprising an initiator and a second part comprising a polymerizable material; applying the first part of the sealant to a substrate of a first fuel cell component; applying the second part of the sealant to a substrate of a second fuel cell component; juxtaposingly aligning the substrates of the first and second fuel cell components; and curing the sealant to bond the first and second fuel components to one and the other. The initiator may be an actinic radiation initiator, whereby the sealant is cured by actinic radiation. The polymerizable material may be a polymerizable monomer, oligomer, telechelic polymer, functional polymer and combinations thereof. Desirably, the functional group is epoxy, allyl, vinyl, acrylate, methacrylate, imide, amide, urethane and combinations thereof. Useful fuel cell components to be bonded include a cathode flow field plate, an anode flow field plate, a resin frame, a gas diffusion layer, an anode catalyst layer, a cathode catalyst layer, a membrane electrolyte, a membrane-electrode-assembly frame, and combinations thereof.

The invention discloses a method of preparing a telechelic polymer. The method comprises the following steps: mixing a metallorganic compound with a macro-molecule polymer having a main chain containing a carbon-carbon double bond, and obtaining a telechelic polymer after broken chain reaction. As compared with the prior art, through the principle of metallorganic compound activation carbon-carbon bond reaction, a telechelic polymer with an end having a responsive function group is obtained via carbon-carbon bond breaking by the metallorganic compound and the macro-molecule polymer, a method is provided for recovery of high added value of a waste high-molecular polymer, important meanings are exhibited for recovery and treatment of crosslinking rubber and waste tires, and a potential application prospect and remarkable social and economic benefits are presented. The result of an experiment shows that the molecular weight of the telechelic polymer prepared by the method is 500Da~10kDa, the molecular weight distribution index ranges from 1.5 to 5, and the functionality is from 1%~99%.

The invention discloses a tearing-resistant biaxially oriented polyester greenhouse film and a production method thereof. The tearing-resistant biaxially oriented polyester greenhouse film is prepared from terephthalic acid, ethylene glycol, modified dihydric alcohol, a telechelic polymer, a catalyst, a first stabilizing agent, an opening agent and a second stabilizing agent. The production method comprises weighing terephthalic acid, ethylene glycol, modified dihydric alcohol, the catalyst, the opening agent and the second stabilizing agent according to a certain ratio, mixing the weighed materials to obtain a uniform mixture, putting the mixture into a reactor, heating the mixture for an esterification reaction, then adding the telechelic polymer and the first stabilizing agent into the reaction product, carrying out high vacuum polycondensation, discharging the product, carrying out cooling, carrying out grain-sized dicing to obtain polyester for a greenhouse film and carrying out bidirectional stretching on the polyester to obtain the tearing-resistant polyester greenhouse film. The polyester greenhouse film has good flexibility, tearing resistance, transparency and light and oxygen aging resistance and is completely suitable for the field of an agricultural greenhouse film.

A preparation method for temperature-sensitive core-shell structured microspheres and an application thereof in separation. According to the present invention, first mercaptopropyl triethoxysilane (MPT) and N-isopropyl acrylamide are reacted to generate semi-telechelic polymers, then the semi-telechelic polymers are coupled with ultrafine colloidal silica particles, so composite particles with poly-N-isopropyl acrylamide as the shells and colloidal silica particles as the cores are prepared. Differential scanning calorimetry tests show that the composite particles are temperature-sensitive. The prepared composite particles are used as a stationary phase in high pressure liquid chromatography, and water is used as a main ingredient of a mobile phase, and naphthalene derivatives are separated successfully through the control of column temperatures, achieving good separation effect.

The invention discloses an efficient water-proofing and oil-proofing agent containing a telechelic polymer. The water-proofing and oil-proofing agent comprises the following components in percentage by mass: 20 to 35 percent of fluorine-containing polymer, 2 to 8 percent of surfactant, 2 to 10 percent of an aid and water. The water-proofing and oil-proofing agent provided by the invention has goodwaterproof and oilproof effects. The water-proofing and oil-proofing agent provided by the invention adopts special raw materials, and have better waterproof and oilproof effects, better hand feelingand more excellent washing resistance compared with the prior art.

The invention discloses a high temperature-resistant sealant composition. The sealant composition is prepared from matrix resin, telechelic polymer, filler, vulcanizing agent, and accelerant; and the telechelic polymer is hydroxyl-terminated polybutadiene and/or polyisoprene. As the telechelic polymer is adopted in the formula, the high temperature resistance of the sealant can be enhanced, and the phenomenon of mold sticking cannot occur during stripping under high temperature. The invention further provides a high temperature-resistant sealant tape and a preparation method for the high temperature-resistant sealant tape.

The invention discloses a preparation method and a product of a high-temperature anaerobic adhesive. The method comprises the following steps of: firstly, taking a self-made active telechelic polymer, namely end methyl acrylate nitrile butadiene rubber, as a modified elastomer; and compounding a methacrylic acid monomer or prepolymer, a polymerization inhibitor, inorganic filling, a thixotropic agent, an accelerant and an initiator to prepare an acrylic acid series anaerobic adhesive product. The preparation method and the product have the characteristics of convenient raw material source, simple manufacturing process, long storage time, simple and convenient sizing technology, no solvent and environmental friendliness, capability of being rapidly cured at a room temperature, good toughness of an adhesive layer, high adhering strength, good comprehensive performances and the like.

The invention discloses a single-component polyurethane waterproof coating and a preparation method thereof. The single-component polyurethane waterproof coating comprises the following main raw materials in parts by weight: 5-30 parts of polyether polyol, 10-30 parts of a telechelic polymer, and 5.0-7.7 parts of diisocyanate, wherein the weight ratio X: Y of the polyether polyol to the telechelic polymer is 1: (1-6). The telechelic polymer is used for modifying the single-component polyurethane waterproof coating, the bonding performance of the polyurethane coating is greatly improved, the retention rate of the bonding strength of the polyurethane coating and concrete after long-term water soaking is still high, and the problem that the retention rate of the bonding strength of an existing coating and concrete after long-term water soaking is low is solved.

The invention relates to a preparation method of a crystal nucleus type concrete super-early strength agent. The method comprises the specific steps as follows: firstly, stirring hydrated magnesium silicate in an ethylene glycol aqueous solution by use of a transition metal complex to obtain a modified magnesium silicate solution; then, modifying a calcium compound and silica sol with nano titanium dioxide to obtain a modified calcium-silicon aqueous solution; next, placing a telechelic polymer and the modified magnesium silicate solution at the bottom of a kettle, and meanwhile, dropwise adding the modified calcium-silicon aqueous solution to obtain the crystal nucleus type concrete super-early strength agent after a reaction. A C-S-H crystal nucleus nano gel structure is modified with the telechelic polymer, the super-early strength of concrete can be effectively improved, the concrete workability and later strength development are not affected, and the concrete super-early strengthagent is low in cost and stable in performance.

The invention discloses a method for synthesizing polythioether, particularly relates to a mercapto-ene photopolymerization system using a benzaldehyde derivative as a catalyst. The method comprises the step of synthesizing the polythioether by taking alpha,omega-dimercapto compound and alpha,omega-divinyl ether as a monomer. The method has the advantages that visible lights (such as a household 23W energy-saving lamp) can be used as a light source with an inexpensive benzaldehyde compound as a catalyst, and the stepwise addition polymerization reaction of mercapto-ene can be realized at room temperature. Moreover, alpha,omega-dimercapto-terminated telechelic polymers can be prepared by controlling the reaction monomer ratio. In addition, the telechelic polymers still retain characteristics of living polymerization, can continue to conduct addiction reaction with divinyl monomers under the action of the catalyst. The method for synthesizing the polythioether has mild reaction conditions, a wide application range, colorless/odorless performance (without post-treatment to the product) and high reaction speed.