摘要:
The invention provides a polymer prepared from a substituted 1,3-butadiene (such as neophytadiene) derived from a plant of the Nicotiana species. The invention also provides smoking articles and smokeless tobacco compositions that include the polymers described herein. Further, the invention provides a method of polymerizing a substituted 1,3-butadiene derived from a plant of the Nicotiana species, the method including reacting a substituted 1,3-butadiene derived from a plant of the Nicotiana species with one or more reagents selected from the group consisting of an anionic initiator, a radical initiator, and a Ziegler-Natta catalyst.
摘要:
1,3-pentadiene is polymerized from a mixture of saturated and unsaturated hydrocarbon compounds, the compounds having primarily 5 carbon atoms per molecule, with an anionic polymerization initiator. The mixture of saturated and unsaturated hydrocarbon compounds is contacted, in an inert atmosphere, with an anionic polymerization initiator to form a reaction mixture. The anionic polymerization initiator is present in an amount sufficient to inactivate polymerization-terminating compounds present in the mixture and to initiate polymerization of 1,3-pentadiene from the mixture. The reaction mixture is heated with stirring to a temperature sufficient to inactivate the polymerization terminating compounds. After inactivation of the polymerization terminating compounds, the reaction mixture is then heated with stirring to a temperature sufficient to initiate polymerization of 1,3-pentadiene from the reaction mixture. Polymer recovery and subsequent functionalization, if any, follow thereafter.
摘要:
Curable compositions are prepared using polyisocyanates, hydrophobic hydroxyl-terminated polymers (such as hydroxyl-terminated polyfarnesenes and hydroxyl-terminated polydienes) and organically-modified nanoclays, optionally in combination with chain extenders and/or urethane catalysts. When cured, the compositions yield polyurethane-based sealants useful in insulating glass units which have improved (lowered) moisture vapor transmission rate values as a consequence of the inclusion of the organically-modified nanoclays.
摘要:
The present invention provides an optically transparent peroxide cured article made from a peroxide curable butyl rubber ionomer comprising repeating units derived from the reaction product of one or more multiolefin monomers and at least one nitrogen or phosphorous based nucleophile comprising a pendant vinyl group. A process is also disclosed for making the optically transparent article.
摘要:
The invention provides a polymer prepared from a substituted 1,3-butadiene (such as neophytadiene) derived from a plant of the Nicotiana species. The invention also provides smoking articles and smokeless tobacco compositions that include the polymers described herein. Further, the invention provides a method of polymerizing a substituted 1,3-butadiene derived from a plant of the Nicotiana species, the method including reacting a substituted 1,3-butadiene derived from a plant of the Nicotiana species with one or more reagents selected from the group consisting of an anionic initiator, a radical initiator, and a Ziegler-Natta catalyst.
摘要:
The present invention relates to a curable petroleum resin, a preparation method therefor, and use thereof, wherein the curable petroleum resin comprises a repeating unit derived from a petroleum resin monomer, a repeating unit derived from a silane monomer and a repeating unit derived from a cyclic anhydride monomer, and wherein the curable petroleum resin is used as an additive for a reactive polyolefin-based adhesive composition to increase the adhesive strength to a polyolefin-based substrate used for various parts.
摘要:
According to an embodiment of the present invention, there is provided a method of preparing a rubber composition, which includes (a) synthesizing a living polymer by solution polymerization of a monomer mixture including a conjugated diene-based monomer in the presence of a first catalyst; (b) reacting some ends of the living polymer with a coupling agent; (c) reacting the remaining ends of the living polymer with an organotin halide compound to prepare an end-modified conjugated diene-based polymer solution; and (d) adding a second catalyst and a conjugated diene-based monomer to the end-modified conjugated diene-based polymer solution to induce solution polymerization.
摘要:
Antioxidant polymer foams and uses thereof are described herein. These foams are synthesized using a Carboni-Lindsey reaction of 1,2,4,5-tetrazine with a polymer having alkenyl functional groups. The foams feature dihydropyridazine functional groups which can be oxidized to consume surrounding reactive oxidizing chemicals and are consequently antioxidant.