摘要:
silyl group-containing vinyl resin having a molecular weight of 500 to 100,000, the main chain of which is substantially composed of a vinyl polymer, and which has per one molecule at least one silicon atom to which a hydrolyzable group is bonded, and which has 1 to 95 % by weight of units of a monomer selected from the group consisting of an acrylic acid alkyl ester and a methacrylic acid alkyl ester, said alkyl having not less than 10 carbon atoms, which has an excellent abrasion resistance and scratch resistance, and a curable composition containing the silyl group-containing vinyl resin.
摘要:
A neoalkoxy compound having the following formula: wherein M is titanium or zirconium, R, R 1 and R 2 are each a monovalent alkyl, alkenyl, alkynyl, aralkyl, aryl or alkaryl group having up to twenty carbon atoms or a halogen or ether substituted derivative thereof, and, in addition, R 2 may also be an oxy derivative or an ether substituted oxy derivative of said groups; A, B, and C are each a monovalent aroxy, thioaroxy, diester phosphate, diester pyrophosphate, oxyalkylamino, sulfonyl or carboxyl containing up to 30 carbon atoms; and a + b + c = 3. The compound is useful as a coupling and polymer processing agent and compositions containing the compound and methods of preparing polymeric material including the compound are also described.
摘要:
Boronation of hydrocarbyl-substituted succinimide dispersants (e.g. for lubricating oils) may be conducted by adding a lower alcohol solution of a boronating agent to the dispersant and distilling out the alcohol. The product is substantially haze-free and is compatible with fluoroelastomers such as are often used in heavy duty clutch plate facings.
摘要:
A moisture curable composition having an improved storage stability comprising a hydrolyzable silyl group-containing vinyl polymer and an orthoacetic acid ester as a stabilizer. The storage stability of the composition containing the hydrolyzable silyl group-containing vinyl polymer, which is curable in the presence of moisture at low temperatures, can be remarkably improved by the presence of the orthoacetic acid ester.
摘要:
@ A family of polymer bound organometallic complexes comprises compounds derived from a metal and a functionalised organic polymer of formula wherein X is a polymer backbone bonded to a ligand in which; Y is a group derived from an atom selected from C, Si, N and P; R 1 , R 2 , R 3 and R 4 are, independently, groups selected from H, a C 1 -C 4 alkyl group and a halogen atom; R 5 and R 6 are, independently, groups selected from H, a C 1 -C 4 alkyl group and a halogen atom, or together with the nitrogen atom from a heterocyclic ring having 5 or 6 atoms; R 7 and R 8 are, independently, groups selected from H, a C 1 -C 4 alkyl group, an aryl group and a halogen atom and each of n and m have a value from 0 to 10. When the metal is either molybdenum or vanadium the complexes are suitable catalysts for the epoxidation of olefins.
摘要:
The disclosure of this application is directed to the production of silane modified copolymers of alkylene-alkyl acrylates by reacting a mixture containing a polysiloxane and a copolymer of alkylene-alkyl acrylate to produce a water-curable, silane modified copolymer. The polysiloxanes have the repeating unit: wherein R is a hydrocarbon radical, each V is hydrogen, a hydrocarbon radical or a hydrolyzable group and Z is a hydrolyzable group, n is an integer having a value of 1 to 18 inclusive, Z is a hydrolyzable group, and x is an integer having a value of at least 2. The silane modified copolymers can be extruded about electrical conductors, e.g. wires and cables, to provide insulation thereon characterized by improved surface characteristics.
摘要:
A modifier composition is disclosed for compounding with a polyolefin to produce a resin from which cement adherent polyolefin fibers may be produced by conventional fiber forming methods. The modifier composition comprising a polyolefin resin modified to contain a reactive Si(IV) moie- ity. A preferred embodiement comprises the reaction product obtained from the high shear dry blending of an alkylamino alkoxysilane with an acid modified polyolefin, preferably gamma-aminopropyltriethoxysilane dry blended with maleated polypropylene. Such modifier composition when compounded in from about 1 to about 10 weight percent with a polyolefin, preferably polypropylene, provides a resin from which cement adherent fibers may be produced.
摘要:
A metal-containing polyaledehyde microsphere composed of a polyaldehyde microsphere to which a transition metal, e.g. Au, Ag, Pt, Pd, Tc, Fe, Ni or Co, is bound may be obtained in accordance with this invention. The polyaldehyde, e.g. polyacrolein or polyglutaraldehyde, may be encapsulated in agarose, and the mocrosphere may be radioactive or magnetic. The microphere may additionally have a compound having at least one amine group, e.g. a drug, antibody, antigen, enzyme or other protein, bound to its surface. In one embodiment a transition metal is bound to a polyaldehyde microsphere by contacting the polyaldehyde microsphere with a suitable amount of an appropriate salt or acid of the transition metal under suitable conditions so as to cause the salt or acid to be reduced to a lower valence state and to bind to the microsphere. Some salts or acids may thus be reduced to the elemental state; others are further reduced with an appropriate reducing agent. In another embodiment, a transition metal in elemental form is bound to a polyaldehyde microsphere by contacting the polyaldehyde microsphere with a suitable amount of a compound capable of complexing with a salt or acid of the transition metal under suitable conditions permitting binding of the compound to the microsphere, contacting the compound with an appropriate amount of an appropriate salt or acid of a transition metal under appropriate conditions permitting the compound to bind to the salt or acid, and reducing the salt or acid to the corresponding elemental metal by contacting it under effective reducing conditions and for a sufficient period of time with a sufficient amount of an effective reducing agent. The metal-containing microsphere of this invention is useful for such applications as cell labeling, cell separation, diagnostic methods, catalysis and coating methods.
摘要:
The disclosure is directed to water curable polymers of an azide sulfonyl silane and a substantially linear, low pressure ethylene polymer which are resistant to water and electrical treeing and can be used as coverings, such as insulation, about wires and cables.
摘要:
Water-curable, silane modified chlorosulfonated olefinic polymers, particularly desirable for use as coverings about wires and cables, produced by reacting a mixture containing a chlorosulfonated olefinic polymer and a hydrolyzable silane having cyclic oxygen, sulfur or nitrogen functionality.