Detail of "1282-40-2"

Reference

Block copolymers of ethylene and propylene

Block copolymers of ethylene and propylene. Blunt, Harry W. (Hercules Inc. , USA). U.S. US 4408019 A 4 Oct 1983, 6 pp. (English). (United States of America). CODEN: USXXAM. CLASS: IC: C08F297-08. NCL: 525323000. APPLICATION: US 81-272452 11 Jun 1981. DOCUMENT TYPE: Patent CA Section: 35 (Chemistry of Synthetic High Polymers) Thermoplastic elastomeric block copolymers (R1R2)nR1 (R1 = cryst. polypropene having intrinsic viscosity (decahydronaphthalene, 135°) ~0.25-1.6 dL/g; R2 = ethylene-propene copolymer having intrinsic viscosity ~3.0-7.0 dL/g) are prepd. Thus, 120 mL 1.98 M ether soln. of MeMgCl [676-58-4] was added over 10 min to 400 mL Et2O soln. contg. 27.1 g dichlorobis(methylcyclopentadienyl)titanium [1282-40-2] at 0°. The mixt. was stirred overnight at room temp. to give dimethylbis(methylcyclopentadienyl)titanium (I) [78169-38-7]. C3H6 was added at partial pressure 178 mm Hg to a mixt of 2 L pentane and 5 mmol I at 45°. TiCl3 (10 mmol) was then added. When 56 mm Hg of C3H6 was consumed, C2H4 was added to bring the monomer partial pressure to 180 mm Hg. After 22.2 L of the mixt. was consumed, the monomer feed was shut off and the reactor was vented to the vapor pressure of pentane at 45°. C3H6 (2.4 L) was added to give 34.5 g block ethylene-propene copolymer [9010-79-1] having intrinsic viscosity 4.47 dL/g.

Block copolymers using dimethyl-bis(methylcyclopentadienyl)titanium

Block copolymers using dimethyl-bis(methylcyclopentadienyl)titanium. Lock, George Arbuthnot, Jr. (Hercules Inc. , USA). Eur. Pat. Appl. EP 41361 A1 9 Dec 1981, 21 pp. DESIGNATED STATES: R: BE, CH, DE, FR, GB, IT, NL, SE. (English). (European Patent Organization). CODEN: EPXXDW. CLASS: IC: C08F297-08; C08F004-76. APPLICATION: EP 81-302346 27 May 1981. PRIORITY: US 80-155691 2 Jun 1980; US 81-265118 19 May 1981. DOCUMENT TYPE: Patent CA Section: 39 (Synthetic Elastomers and Natural Rubber) Section cross-reference(s): 29 Elastomeric polymers contg. cryst. polypropylene blocks and random C2H4-C3H6 copolymer blocks are prepd. by polymn. with TiCl3 catalyst activated by dimethylbis(methylcyclopentadienyl)titanium (I) [78169-38-7]. Thus, stirring 5 mmol I [prepd. from dichlorobis(methylcyclopentadienyl)titanium [1282-40-2] and MeMgCl] and 10 mmol TiCl3 in 2 L pentane with C3H6 at 45° until the C3H6 partial pressure fell from 178 to 56 mm Hg, then adding C2H4 until the monomer partial pressure was 180 mm Hg, and feeding 22.2 L C2H4-C3H6 to maintain this pressure, then venting the unreacted monomers, adding 2.4 L C3H6, and stirring gave 34.5 g block copolymer contg. 40.7% C2H4, 13.7% cryst. polypropylene, and 12.5% cryst. polyethylene, with intrinsic viscosity (Decalin, 135°) 4.47 dL/g, Shore A hardness 83 and 73 at 23° and 70°, resp., compression set 48% at 70°, and tensile strength 1.67 ′ 106 kg/m2.