Reference

Polymerizing a-olefins

Polymerizing a-olefins. (Mitsui Toatsu Chemicals, Inc., Japan). Jpn. Kokai Tokkyo Koho JP 58111805 A2 4 Jul 1983 Showa, 7 pp. (Japanese). (Japan). CODEN: JKXXAF. CLASS: IC: C08F010-00; C08F004-02; C08F004-64. APPLICATION: JP 81-209292 25 Dec 1981. DOCUMENT TYPE: Patent CA Section: 35 (Chemistry of Synthetic High Polymers) Co-milled products of Mg halides, orthocarboxylic acid esters, org. Si compds., and halogenated hydrocarbons were contacted with liq. Ti halides and the resulting activated Ti compds. were used together with org. Al compds. as catalyst for stereoregular polymn of a-olefins. Thus, 20 g MgCl2, 1 mL Et orthoacetate [78-39-7], 1 mL Si(OEt)4 [78-10-4], and 4 mL 1,2-dichloroethane [107-06-2] were ball-milled 40 h under N and the mixt. (10 g) was stirred 2 h at 80° with 50 mL TiCl4 to give the activated Ti component (A; 2.35 wt. % Ti). Liq. propylene (1.5 kg) was kept 3 h at 75° in an autoclave contg. 50 mL n-heptane, 30 mg A, 0.20 mL Et3Al [97-93-8], 0.14 mL Me p-toluate [99-75-2], and 0.24 mL Et2AlCl [96-10-6] to give 605 g isotactic polypropylene [25085-53-4] (96.6% boiling n-heptane extn. residue).

Ethylene-propylene random copolymer by bulk polymerization with ethylene content 0

Ethylene-propylene random copolymer by bulk polymerization with ethylene content 0.5-10%. (Mitsui Toatsu Chemicals, Inc., Japan). Jpn. Kokai Tokkyo Koho JP 58120615 A2 18 Jul 1983 Showa, 4 pp. (Japanese). (Japan). CODEN: JKXXAF. CLASS: IC: C08F210-16; C08F002-02; C08F006-26. APPLICATION: JP 82-3345 14 Jan 1982. DOCUMENT TYPE: Patent CA Section: 35 (Chemistry of Synthetic High Polymers) The title copolymer [9010-79-1] with good low-temp. properties and transparency is prepd. in liq. propylene at 60-80° followed by deactivating the polymn. catalyst at 40-60° and washing with propylene at 20-60°. Thus, a solid catalyst component (A) (Ti 1.62%) was prepd. from MgCl2, Et orthoacetate [78-39-7], ClCH2CH2Cl [107-06-2], and TiCl4. Propylene (5 kg) was polymd. 2 h at 70° in the presence of 1 g A and heptane 500, Et2AlCl [96-10-6] 4.8, Me p-toluate [99-75-2] 2.8, and Et3Al [97-93-8] 1 mL, with 3.5% H and 2.5% ethylene present in the gas phase and continuous further addn. of AlEt3. The product was treated 30 min at 50° with 10 mL diethylene glycol monoisopropyl ether [5412-01-1] and then with propylene to give 97% copolymer of ethylene content 4.2% and intrinsic viscosity 1.61.