Claims
- 1. A partially crosslinked olefin polymer, obtained by reacting
- a) an ethylene polymer having a density of from 0.90 to 0.98 g/cm.sup.3 or
- b) a graft polymer comprising
- propylene homopolymer, and
- propylene copolymer, said propylene copolymer including propylene and C.sub.2 -C.sub.10 -alk-1-ene comonomers,
- said propylene homopolymer being present in said polymer b) in an amount of from 25 to 95% by weight of polymer b), said propylene copolymer being present in said polymer b) in an amount of from 5 to 75% by weight of polymer b), and each of said comonomers being present in said polymer b) in an amount of from 1 to 45% by weight of polymer b),
- in the absence of free radical initiators and of an inorganic filler, with from 0.001 to 5% by weight, based on the olefin polymer, of a bismaleimido compound of the formula (I) ##STR5## where R is C.sub.1 -C.sub.20 -alkyl which may be interrupted by one or more oxygen atoms, or is C.sub.5 -C.sub.7 -cycloalkyl or C.sub.6 -C.sub.20 -aryl, each of which in turn may be substituted by one or more C.sub.1 -C.sub.10 -alkyl or C.sub.1 -C.sub.6 -alkoxy or C.sub.1 -C.sub.4 -dialkylamino groups, or is a radical of the following formula (II)
- R.sup.1 -Z-R.sup.2 (II)
- where R.sup.1 and R.sup.2 independently of one another are each C.sub.1 -C.sub.10 -alkyl, C.sub.5 -C.sub.7 -cycloalkyl or C.sub.6 -C.sub.10 -aryl, each of which in turn may be substituted by one or more C.sub.1 -C.sub.10 -alkyl or C.sub.1 -C.sub.6 -alkoxy or C.sub.1 -C.sub.4 -dialkylamino groups, and Z is C.sub.1 -C.sub.10 -alkyl, C.sub.1 -C.sub.4 -dialkylamino, oxygen or sulfonyl.
- 2. A partially crosslinked olefin polymer as defined in claim 1, obtained by reacting a bismaleimido compound of the formula (I) with a polymer b) which consists of from 40 to 90% by weight of a propylene homopolymer and from 10 to 60% by weight of a propylene copolymer with from 2 to 40% by weight, based on the total polymer, of polymerized C.sub.2 -C.sub.10 -alk-1-enes.
- 3. A partially crosslinked olefin polymer as defined in claim 1, obtained by reacting a bismaleimido compound of the formula I with an ethylene polymer a) having a density of from 0.91 to 0.97 g/cm.sup.3.
- 4. A partially crosslinked olefin polymer as defined in claim 1, wherein the bismaleimido compound of the formula (I) is one in which R is C.sub.2 -C.sub.10 -alkyl which may be interrupted by one or more oxygen atoms, or is C.sub.5 -C.sub.7 -cycloalkyl or C.sub.6 -C.sub.15 -aryl, each of which in turn may be substituted by one or more C.sub.1 -C.sub.4 -alkyl groups, or is a radical of the formula (II) R.sup.1 -Z-R.sup.2, where R.sup.1 and R.sup.2 independently of one another are each C.sub.1 -C.sub.6 -alkyl, C.sub.5 -C.sub.7 -cycloalkyl or C.sub.6 -C.sub.10 -aryl, and Z is oxygen or sulfonyl.
- 5. A partially crosslinked olefin polymer as defined in claim 1, obtained by reacting the olefin polymer a) or b) with a bismaleimido compound selected from the group consisting of 1,6-bismaleimidohexane, 1,3-bismaleimidobenzene, 1,3-bismaleimido-4-methylbenzene, 4,4'-bismaleimidodiphenylmethane, 4,4,-bismaleimido-3,5,3',5'-tetramethyldiphenylmethane and 3,3'-bismaleimidodiphenyl sulfone.
- 6. A film or molding of a partially crosslinked olefin polymer as claimed in claim 1.
Priority Claims (1)
Number |
Date |
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Kind |
42 19 861.5 |
Jun 1992 |
DEX |
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Parent Case Info
This application is a continuation of application Ser. No. 08/072,051, filed on Jun. 7, 1993, now abandoned.
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
5143953 |
Pourahmady |
Sep 1992 |
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Foreign Referenced Citations (1)
Number |
Date |
Country |
2269128 |
Nov 1990 |
JPX |
Non-Patent Literature Citations (4)
Entry |
Chow et al., Gummi, Ashest, Kunstet, 31, (1978). |
Tawney et al., J. Appl. Polymer Sci. vol. 8 pp. 2231-2298 (1961). |
Miller et al., J. Polym. Sci. 58 (1962) 737. |
Japanese Preliminary Published Application 269 128/90. |
Continuations (1)
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Number |
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Parent |
72051 |
Jun 1993 |
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