Claims
- 1. A bitumen-containing composition comprising, by weight:
- (a) 15 to 20% of an amorphous copolymer of 25-75% by weight of propylene, 20-70% by weight of butene-1 and 0-15% by weight of ethylene, alone or in admixture with up to 40% by weight of atactic polypropylene,
- (b) 3 to 5% of an EPDM,
- (c) 60 to 82% of a distilled bitumen obtained from the residue of atmospheric crude oil distillation by vacuum distillation or light oxidation, having a ring and ball softening point of about 35.degree. to about 70.degree. C.,
- (d) 0 to 3% of an isotactic polypropylene,
- (e) 0 to 15% of a conventional filler,
- (f) 0 to 1% of an antioxidizing agent, wherein the EPDM is an ethylene-propylene-ethylidene norbornene terpolymer of the sequence type with 25 to 30% by weight of propylene, 6 to 8 double bonds per 1000 C atoms and a green strength of >10 MPa.
- 2. A composition according to claim 1, wherein amorphous copolymer (a) consists essentially of 0 to 15% by weight of ethylene, 60 to 70% by weight of propylene and 20 to 30% by weight of n-butene-1 polymer units, has a J value of 70 to 90 cm.sup.3 /g, a melt viscosity at 190.degree. C. of 10 to 40 Pa s and a ring-and-ball softening point of >150.degree. C.
- 3. A coating composition according to claim 1, wherein amorphous copolymer (a) consists essentially of 0 to 15% by weight of ethylene, 25 to 35% by weight of propylene and 60 to 70% by weight of n-butene-1 polymer units, has a J value of 60 to 80 cm.sup.3 /g, a melt viscosity at 190.degree. C. of 10 to 40 Pa s and a ring-and-ball softening point of >150.degree. C.
- 4. A coating composition according to claim 1, wherein amorphous copolymer (a) consists essentially of 0 to 15% by weight of ethylene, 60 to 70% by weight of propylene and 20 to 30% by weight of n-butene-1 polymer units, has a J value of 90 to 110 cm.sup.3 /g, a melting viscosity at 190.degree. C. of 40 to 150 Pa s and a ring-and-ball softening point of >150.degree. C.
- 5. A composition according to claim 1, wherein amorphous copolymer (a) is in admixture with atactic polypropylene.
- 6. A composition according to claim 1, wherein the bitumen has a ring and ball softening point below about 60.degree. C.
- 7. A composition according to claim 1, wherein the bitumen has a ring or ball softening point of about 37.degree. to about 44.degree. C.
Priority Claims (1)
Number |
Date |
Country |
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3509037 |
Mar 1985 |
DEX |
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Parent Case Info
This is a division of application Ser. No. 838,981 filed Mar. 12, 1986, now U.S. Pat. No. 4,707,413.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
4081502 |
Bluemel et al. |
Mar 1978 |
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4659759 |
Jeranoff et al. |
Apr 1987 |
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Number |
Date |
Country |
0009432 |
Apr 1980 |
EPX |
2517056 |
Oct 1976 |
DEX |
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GBX |
Divisions (1)
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Number |
Date |
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Parent |
838981 |
Mar 1986 |
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