5 results about "Alkadienes" patented technology

The invention relates to a diblock polymer of formula A-B in which the symbol A represents a polystyrene block, the symbol B represents a statistical copolymer block of ethylene and a branched 1,3-diene of formula CH2=CR'-CH=CH2, the symbol R' representing a hydrocarbon chain having 3 to 20 carbon atoms, the diblock polymer bearing at the chain end a functional group containing a silanol or alkoxysilane function, the styrene units of the block A being present in the diblock in a molar content of less than 15% of the repeating units constituting the diblock polymer, and the diblock polymer having a Mooney viscosity ML (1+4) at 100°C greater than 30. The invention also relates to a method for synthesizing a polymer of this kind, and to a rubber composition containing same and intended to be used in particular in a tyre.

The invention relates to a triblock polymer of formula A-B-C in which the symbol A represents a polystyrene block, the symbol B represents a statistical copolymer block of ethylene and a branched 1,3-diene of formula CH2=CR'-CH=CH2, the symbol R' represents a hydrocarbon chain having 3 to 20 carbon atoms, and the symbol C represents a polyvinylpyridine block, the styrene units of block A being present in the triblock polymer in a molar content of less than 15% of the repeating units constituting the triblock polymer, the vinylpyridine units of block C being present in the triblock polymer in a molar content of less than 5% of the repeating units constituting the triblock polymer, and the triblock polymer having a Mooney viscosity ML (1+4) at 100°C greater than 30. The invention also relates to a method for synthesizing a polymer of this kind, and to a rubber composition containing same and intended to be used in particular in a tire.

The invention relates to a diblock polymer of formula AB in which the symbol A represents a polystyrene block, the symbol B represents a random copolymer block of ethylene and a branched 1,3-diene of formula CH2=CR'-CH=CH2, the symbol R' representing a hydrocarbon chain having 3 to 20 carbon atoms, the diblock polymer bearing at the end of the chain a functional group containing a silanol or alkoxysilane function, the styrene units of block A being present in the diblock in a molar content of less than 15% of the repeating motifs constituting the diblock polymer, the diblock polymer having a Mooney viscosity ML(1+4) at 100°C greater than 30. The invention also relates to its synthesis process and a rubber composition containing it and intended for use in particular in a tire.

This invention provides techniques for efficiently delivering active ingredients, particularly nucleic acids, into cells, and cationic lipids used in these techniques. The cationic lipids of this invention are compounds represented by formula (I) or their salts. n1 represents an integer from 2 to 6, n2 represents an integer from 0 to 2, n3 represents an integer from 0 to 2, L represents -C(O)O- or -NHC(O)O-, and Ra represents a linear C 5‑13 Alkyl, straight-chain C 13‑17 Alkenyl or straight-chain C 17 Dienyl, Rb represents straight-chain C 2‑9 Alkyl group, Rc represents hydrogen atom or straight-chain C. 2‑9 Alkyl group, Rd represents hydrogen atom or straight-chain C 2‑9 Alkyl, Re indicates straight-chain C 2‑9 Alkyl, Rf indicates straight-chain C 2‑9 alkyl.

The invention relates to a triblock polymer of formula ABC in which the symbol A represents a polystyrene block, the symbol B represents a random copolymer block of ethylene and a branched 1,3-diene of formula CH2=CR'-CH=CH2, the symbol R' represents a hydrocarbon chain having 3 to 20 carbon atoms, and the symbol C represents a polyvinylpyridine block, the styrene units of block A being present in the triblock polymer in a molar content of less than 15% of the repeating units constituting the triblock polymer, the vinylpyridine units of block C being present in the triblock polymer in a molar content of less than 5% of the repeating units constituting the triblock polymer, the triblock polymer having a Mooney viscosity ML(1+4) at 100°C greater than 30. The invention also relates to its synthesis process and a rubber composition containing it and intended for use in particular in a tire.