摘要:
A terminally functionalized liquid polymer is prepared by reacting a low molecular weight living diene polymer or copolymer obtained by anionic polymerization of a diene monomer or mixture of a diene monomer and a vinyl aromatic hydrocarbon monomer with a fused-ring polynuclear aromatic compound. The resultant terminally functionalized liquid diene polymers or copolymers can be utilized as dispersants for particulates such as carbon black or graphite and may also be employed as viscosity modifiers for lubricating oils or in electrorheological devices or damping devices.
摘要:
Diene polymers or copolymers having improved raw polymer viscosity and reduced hysteresis in the cured and carbon black reinforced state are provided. These diene polymers or copolymers are prepared by a method which involves first terminating substantially all of the living diene polymer or copolymer chains obtained by anionic polymerization with a compound having multiple-bonded nitrogen atoms selected from the group consisting of aromatic nitriles and substituted imines having the formula ##STR1## and then coupling a portion of the resultant terminated polymer chains with a polyfunctional reagent selected from the groups consisting of silicon polyhalides, polyisocyanates, phosphoryl halides and polycarboxylic acid halides.
摘要:
A terminally functionalized polymer is prepared by reacting a living polymer obtained by anionic polymerization of a diene monomer or mixture of a diene monomer and a vinyl aromatic hydrocarbon monomer with a fused-ring polynuclear aromatic compound. The resultant terminally functionalized polymers have reduced hysteresis in the carbon black reinforced and cured state and can be utilized to form elastomer compositions for tire treads having reduced rolling resistance.
摘要:
An anionic polymerization initiator comprising the reaction product of a functionalizing agent selected from the group consisting of substituted aldimines, ketimines and secondary amines and, an organolithium compound. Elastomeric polymers prepared with these initiators have functional sites incorporated at the initiator end of the polymer chain and provide vulcanizable rubber compounds exhibiting reduced hysteresis. Articles such as tires, produced with low hysteresis elastomeric polymers have lower rolling resistance. Methods are also provided for preparing the initiators, fuctionalized polymers and vulcanizable elastomeric compounds having reduced hysteresis.
摘要:
A process for producing benzene-soluble substantially linear dichlorophosphazene polymer having the formula (NPCl.sub.2).sub.x, in which x is greater than 20 and may be as high as 50,000 or higher, from a cyclic oligomer having the formula (NPCl.sub.2).sub.n, in which n is from 3 to 9, particularly the trimer (NPCl.sub.2).sub.3 or tetramer (NPCl.sub.2).sub.4, in the presence of a small but significant amount of an inorganic salt, preferably a halide of a metal such as Cr, Ni, Co, Cu, Fe, Mn or Mg which affords control of the molecular weight and avoids the formation of large amounts of gel.
摘要:
The present invention is directed toward anionic polymerization initiators which are soluble in acyclic alkane solvents. The initiators include a solubilized lithio amine having the general formula (A)Li(SOL).sub.y. SOL is a solubilizing component and A is an alkyl, dialkyl or cycloalkyl amine radical or a cyclic amine and y is from about 1 to 4. The cyclic amine has an alkylene, oxy- or amino-alkylene group having from about 3 to about 16 methylene groups. The invention is also directed toward polymers and other products made using the initiator, and methods therefor. Further, the invention contemplates a polymer, a polymer composition and products therefrom, which include a functional group from the reaction product of an amine and an organolithium compound. The resulting polymers may be terminated with a terminating, coupling or linking agent, which may provide the polymer wtih a multifunctionality.
摘要:
The present invention is directed toward anionic polymerization initiators which are soluble in acyclic alkane solvents. The initiators include a solubilized lithio amine having the general formula (A)Li(SOL).sub.y. SOL is a solubilizing component and A is an alkyl, dialkyl or cycloalkyl amine radical or a cyclic amine and y is from about 1 to 4. The cyclic amine has an alkylene, oxy- or amino-alkylene group having from about 3 to about 16 methylene groups. The invention is also directed toward polymers and other products made using the initiator, and methods therefor. Further, the invention contemplates a polymer, a polymer composition and products therefrom, which include a functional group from the reaction product of an amine and an organolithium compound. The resulting polymers may be terminated with a terminating, coupling or linking agent, which may provide the polymer with a multifunctionality.
摘要:
The present invention is directed toward anionic polymerization initiators which are soluble in acyclic alkane solvents. The initiators include a solubilized lithio amine having the general formula (A)Li(SOL).sub.y. SOL is a solubilizing component and A is an alkyl, dialkyl or cycloalkyl amine radical or a cyclic amine and y is from about 1 to 4. The invention is also directed toward polymers and other products made using the initiator, and methods therefore. Further, the invention contemplates a polymer, a polymer composition and products therefrom, which include a functional group from the reaction product of an amine and an organolithium compound. The resulting polymers may be terminated with a terminating, coupling or linking agent, which may provide the polymer with a multifunctionality.
摘要:
The present invention is directed toward anionic polymerization initiators which are soluble in hydrocarbon solvents. The initiators include a lithio amine having the general formula ALi. The component A is a dialkyl or dicycloalkyl amine radical or a cyclic amine. The invention is also directed toward polymers and other products made using the initiator, and methods therefor. Further, the invention contemplates a polymer, a polymer composition and products therefrom, which include a functional group from the reaction product of an amine and an organolithium compound. The resulting polymers may be terminated with a terminating, coupling or linking agent, which may provide the polymer with a multifunctionality.
摘要:
Thermal polymerization of (NPCl.sub.2).sub.3,4 is improved by conducting the polymerization in the presence of Lewis Acid type compounds of Al or B.