Patente US6156846 - Flexible polypropylene resins, propylene bases elastomer compositions and ...

United States Patent [w]

Tsuruoka et al.

US006156846A [ii] Patent Number: [45] Date of Patent:

6,156,846 Dec. 5, 2000

[54] FLEXIBLE POLYPROPYLENE RESINS,
PROPYLENE BASES ELASTOMER
COMPOSITIONS AND PROCESS FOR
PRODUCTION OF OLEFIN POLYMERS

[75] Inventors: Masayuki Tsuruoka; Rikuo Onishi;

Hideo Kusuyama; Akinobu Sugahara,

all of Ichihara, Japan

[73] Assignee: Idemitsu Petrochemical Co., Ltd.,

Tokyo,Japan

[21] Appl. No.: 09/352,361 [22] Filed: Jul. 13, 1999

Related U.S. Application Data

[60] Division of application No. 08/991,536, Dec. 16, 1997, Pat. No. 6,001,933, which is a continuation-in-part of application No. 08/450,711, May 25, 1993, abandoned, which is a continuation of application No. 08/105,127, Aug. 12, 1993, abandoned, which is a division of application No. 07/730, 807, Jul. 26, 1991, abandoned.

[30] Foreign Application Priority Data

Nov. 28, 1989 [JP] Japan 1-308573

Nov. 29, 1989 [JP] Japan 1-307519

Feb. 8, 1990 [JP] Japan 2-29266

[51] Int. CI.7 C08L 23/12

[52] U.S. CI 525/240; 526/351

[58] Field of Search 525/240; 526/351

[56] References Cited

U.S. PATENT DOCUMENTS

3,013,003 12/1961 Maragliano et al. .

3,018,263 1/1962 Schneider .

3,492,372 1/1970 Flanagan et al. .

3,846,349 11/1974 Harada et al. .

4,395,519 7/1983 Minami et al. .

4,490,447 12/1984 Battersby .

4,504,617 3/1985 Yui et al. .

4,777,216 10/1988 Busico et al. .

4,822,840 4/1989 Kioka et al. .

4,892,851 1/1990 Ewen et al 502/104

5,023,300 6/1991 Huff et al. .

5,298,561 3/1994 Cecchin et al. .

5,428,127 6/1995 Asanuma et al 528/497

526/351 525/240

Disclosed are a flexible polypropylene resin suitable as thermoplastic elastomer, a propylene based elastomer composition containing the flexible polypropylene resin, and a process for producing the above flexible polypropylene resin and the propylene based elastomer composition. The above flexible polypropylene resin is composed of specific boiling heptane-soluble polypropylene and specific boiling heptaneinsoluble polypropylene. The above propylene based elastomer composition comprises the above flexible polypropylene resin and an ethylene/propylene copolymer or an ethylene/propylene/polyene copolymer. The above process for the production of olefin polymers may be carried out by non-solvent polymerization methods such as a gas phase one-step polymerization method, and a gas phase multi-step polymerization method, using a specific catalyst.

12 Claims, 3 Drawing Sheets