Claims
- 1. A thermoplastic elastomer blend, having a tension set value at 100% elongating of less than 50%, comprising from about 35 to about 50 parts of a vulcanized chlorined polyethylene, from about 15 to about 30 parts of a crystalline thermoplastic polyolefin polymer, and from about 15 to about 60 parts of a thermoplastic non-crosslinked amorphous or semicrystalline chlorosulfonated polyethylene.
- 2. A thermoplastic elastomer blend, having a tension set value at 100% elongation of less than 50%, comprising from about 35 to about 50 parts of vulcanized chlorosulfonated polyethylene, from about 15 to about 30 parts of a crystalline thermoplastic polyolefin polymer, and from about 15 to about 60 parts of a thermoplastic non-crosslinked amorphous or semicrystalline chlorosulfonated polyethylene.
- 3. A thermoplastic elastomer blend, having a tension set value at 100% elongation of less than 50% comprising from about 35 to about 50 parts of a vulcanized chlorosulfonated polyethylene, from about 15 to about 30 parts of a crystalline thermoplastic polyolefin polymer, and from about 15 to about 60 parts of a thermoplastic non-crosslinked amorphous or semicrystalline chlorinated polyethylene.
- 4. A roofing membrane material prepared from the composition of any one of claims 1, 2, or 3, which is resistant to environmentally induced cracking.
- 5. A roofing membrane material prepared from the composition of any one of claims 1, 2, or 3, having a heat resistance area retention of at least 90% when measured at 125.degree. C. under conditions of ASTM D573.
CROSS REFERENCE TO RELATED APPLICATION
This application is a divisional of application Ser. No. 08/045,282, filed Apr. 8, 1993, now Pat. No. 5,286,795, which is a continuation of application Ser. No. 07/629,501, filed Dec. 18, 1990, abandoned, which is a continuation-in-part of Appl. Ser. No. 07/462,666, filed Jan. 4, 1990, and issued as U.S. Pat. No. 4,978,703.
US Referenced Citations (4)
Divisions (1)
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45282 |
Apr 1993 |
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Continuations (1)
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629501 |
Dec 1990 |
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Continuation in Parts (1)
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462666 |
Jan 1990 |
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