摘要:
A rubber composition obtained by compounding thereinto a rubber component containing 0.5 to 100% by weight of a modified conjugated diene-based polymer having a fullerene bonded thereto in the molecule and having a weight average molecular weight of 50,000 or more excellent processability, superior balance of modulus and heat buildup, excellent cold flowability and superior tan δ balance.
摘要:
A rubber composition obtained by compounding thereinto a rubber component containing 0.5 to 100% by weight of a modified conjugated diene-based polymer having a fullerene bonded thereto in the molecule and having a weight average molecular weight of 50,000 or more excellent processability, superior balance of modulus and heat buildup, excellent cold flowability and superior tan δ balance.
摘要:
A rubber composition obtained by compounding thereinto a rubber component containing 0.5 to 100% by weight of a modified conjugated diene-based polymer having a fullerene bonded thereto in the molecule and having a weight average molecular weight of 50,000 or more excellent processability, superior balance of modulus and heat buildup, excellent cold flowability and superior tan δ balance.
摘要:
A rubber composition (COM) obtained by dissolving solution polymerized BR or SBR having a Tg of −100° C. to −40° C. in an organic solvent to form a starting rubber solution, by adding and mixing thereto silica or a mixture of carbon black and silica, silane coupling agent, and softening agent, followed by drying to obtain a master batch (MB) of the silica or carbon black/silica with rubber, adding thereto BR or SBR (R) having a Tg of at least 10° C. higher than the Tg of the starting rubber in the MB, and mixing in an internal mixer, wherein the ratio FMB/FCOM of the concentration FMB of the silica or the mixture of carbon black and silica based upon the rubber in the MB and the concentration FCOM of the silica or the mixture of carbon black and silica based upon the COM is 1.2 to 3.0.
摘要:
A thermoplastic elastomer composition containing a dynamically cross-linked composition of(A) 10 to 70 parts by weight of a thermoplastic resin,(B) 30 to 90 parts by weight of a modified butyl rubber composition containing a modified butyl rubber modified reacting, to butyl rubber, (a) a compound containing, in the molecule thereof, a nitroxide free radical stable at an ordinary temperature in the presence of oxygen, and (c) a bifunctional or higher functional radical polymerizable monomer, and(C) 0.01 to 15 parts by weight of a cross-linking agent.
摘要:
A manufacturing method for a surface-modified rubber molded body is described. An uncross-linked rubber molded body is made of a rubber composition containing an organic peroxide and a modified butyl rubber composition (A) containing a modified butyl rubber (1) where a compound (a) with a stable nitroxide free radical in the molecule at ambient temperature in the presence of oxygen, a radical initiator (b), and a radical polymeric monomer (c) with at least difunctionality are reacted with butyl rubber, or a modified butyl rubber composition (B) where the monomer (c) is added to a modified butyl rubber (2) where the compound (a) and the radical initiator (b) are reacted with butyl rubber. A siloxane compound having a (meth)acryloyl group is applied onto the surface of the uncross-linked rubber molded body. The uncross-linked rubber molded body is then heat-treated.
摘要:
To modify a diene-based rubber whereby the dispersibility of silica and the abrasion resistance or heat buildup resistance are improved.A modified diene-based rubber obtained by adding and reacting, to a diene-based rubber (A), a compound (B) having, in the molecule thereof, a nitroxide free radical stable at an ordinary temperature and in the presence of oxygen, a radical initiator (C) and a radical polymerizable monomer (D) having a functional group in the molecule thereof and a rubber composition and pneumatic tire containing the same.
摘要:
A modified butyl rubber composition including a modified butyl rubber obtained by reacting a compound (a) having, in its molecule, a nitroxide free radical stable at an ordinary temperature in the presence of oxygen, a radical initiator (b), and a bifunctional or higher radical polymerizable monomer (c) or a modified butyl rubber composition containing a modified butyl rubber, obtained by reacting a compound (a) having, in its molecule, a nitroxide free radical stable at ordinary temperature in the presence of oxygen and a radical initiator (b), into which a bi- or more-functional radical polymerizable monomer (c) is compounded.
摘要:
A method for modifying a polymer comprising modifying a polymer capable of decomposing with a carbon radical in the molecule thereof by a reaction with a radical initiator and a compound having a nitroxide radical in the molecule thereof to thereby decrease a molecular weight of the polymer and also to thereby introduce an organic group derived from the free radical into the polymer.
摘要:
A radical-modified polymer having a free radical compound stable in the presence of oxygen at an ordinary temperature at the end of the molecule thereof or in the molecular chain thereof and a polymer composition containing the same.