Claims
- 1. A thermoplastic elastomer produced by the process which comprises:
a) combining polyolefin particles, an acrylate monomer and a free radical polymerization initiator; and b) heating the resultant mixture to cause said acrylate to polymerise and impregnate into said polyolefin particles and to cause crosslinking of said acrylate to produce a polyolefin-polyacrylate blend, wherein crosslinked polyacrylate comprises a dispersed phase in a continuous phase of said polyolefin.
- 2. A thermoplastic elastomer produced by the process which comprises:
a) combining polyolefin particles, an acrylate monomer and a free radical initiator to cause polymerization and impregnation of said acrylate to produce a dispersed phase within said polyolefin particles, and b) elevating the temperature of the resultant mixture to cause cross-linking of said acrylate.
- 3. A thermoplastic elastomer produced by the process which comprises:
a) combining polyolefin particles, an acrylate monomer and a free radical polymerization initiator; and b) heating the resultant mixture to cause said acrylate to polymerize and impregnate into said polyolefin particles and to cause crosslinking of said acrylate to produce a polyolefin-polyacrylate blend, wherein crosslinked polyacrylate comprises a dispersed phase in a continuous phase of said polyolefin, wherein said polyolefin is polypropylene, polypropylene containing units derived from comonomers, polyethylene or polyethylene containing units derived from comonomers, and said acrylate monomers are alkyl acrylates, alkyl methacrylates with 4 or more carbon atoms in the alkyl chain, and alkyl acrylates and methyacrylates which contain polar groups.
- 4. A thermoplastic elastomer produced by the process which comprises:
a) combining polyolefin particles, an acrylate monomer and a free radical initiator to cause polymerization and impregnation of said acrylate to produce a dispersed phase within said polyolefin particles, and b) elevating the temperature of the resultant mixture to cause cross-linking of said acrylate wherein said polyolefin is polypropylene, polypropylene containing units derived from comonomers, polyethylene or polyethylene containing units derived from comonomers, and said acrylate monomers are alkyl acrylates, alkyl methacrylates with four or more carbon atoms in the alkyl chain, and alkyl acrylates and methyacrylates which contain polar groups.
- 5. The method according to claim 3, wherein said acrylate monomers are those which, when polymerized, are rubber like at room temperature and below.
- 6. The method according to claim 4, wherein said acrylate monomers those which, when polymerized, are rubber like at room temperature and below.
- 7. A thermoplastic elastomer according to any one of claims 1-6, wherein a diacrylate or multi functional acrylate is added for cross-linking of said acrylate.
- 8. The thermplastic elastomer, according to claim 1 or 2, wherein said polyolefin is polypropylene polypropylene containing units derived from comonomers, polyethylene or polyethylene containing units derived from comonomers.
- 9. The thermoplastic elastomer, according to any one of claims 1-6, wherein the weight proportion between the polyolefin and the polyacrylate in the blend is 0.1-5.
- 10. The thermoplastic elastomer, according to any one of claims 1-6, wherein 0-40 % of weight oil is added into the polymerisation or during a separate extrusion stage in order to make the material softer.
- 11. The thermoplastic elastomer, according to any one of claims 1-6, wherein the end product contains 0-70% by weight fillers.
- 12. The thermoplastic elastomer, according to any one of claims 1-6, which further contains oil and fillers.
- 13. The thermoplastic elastomer, according to any one of claims 1-3, wherein it is processed by extrusion, injection moulding, blow moulding and coextrusion with polyolefins.
- 14. The thermoplastic elastomer, according to claim 1, wherein said elastomer has good oil and weather resistance properties.
- 15. A thermoplastic elastomer produced by the process which comprises:
a) combining
1) polyolefin particles, wherein said polyolefin particles are comprised of homopolymers or copolymers of ethylene or propylene, 2) an acrylate monomer, wherein said acrylate monomers, when polymerized, are rubber-like at room temperature and below, and 3) a free radical polymerization initiator and b) heating the resultant mixture to cause said acrylate to impregnate into said polyolefin particles and polymerize, and to cause crosslinking of said acrylate to produce a polyolefin-polyacrylate blend, wherein crosslinked polyacrylate comprises a dispersed phase in a continuous phase of said polyolefin, and wherein said polyacrylate phase is in the majority. wherein the weight proportion between polyolefin and the polyacrylate in the blend is 0.1-5.
- 16. A thermoplastic elastomer produced by the process which comprises:
a) combining
1) polyolefin particles, wherein said polyolefin particles are comprised of homopolymers or copolymers of ethylene or propylene, 2) an acrylate monomer, wherein said acrylate monomers, when polymerized, are rubber-like at room temperature and below, and 3) a free radical polymerization initiator to cause impregnation and polymerization of said acrylate to produce a dispersed phase within said polyolefin particles, wherein said polyacrylate phase is in the majority and b) elevating the temperature of the resulting mixture to cause cross-linking of said polyacrylate, wherein the weight proportion between polyolefin and the polyacrylate in the blend is 0.1-5.
- 17. A thermoplastic elastomer produced by the process which comprises:
a) combining
1) polyolefin particles, wherein said polyolefin particles are comprised of homopolymers or copolymers of ethylene or propylene, 2) an acrylate monomer, wherein said acrylate monomers, when polymerized, are rubber-like at room temperature and below, and 3) a free radical polymerization initiator and b) heating the resultant mixture to cause said acrylate to impregnate into said polyolefin particles and polymerize and to cause crosslinking of said acrylate to produce a polyolefin-polyacrylate blend, wherein crosslinked polyacrylate comprises a dispersed phase in a continuous phase of said polyolefin, wherein said polyacrylate phase is in the majority and wherein said polyolefin is polypropylene, polypropylene containing units derived from comonomers, polyethylene or polyethylene containing units derived from comonomers, and said acrylate monomers are alkyl acrylates, alkyl methacrylates with 4 or more carbon atoms in the alkyl chain, and alkyl acrylates and methacrylates which contain polar groups, wherein the weight proportion between polyolefin and the polyacrylate in the blend is 0.1-5.
- 18. A thermoplastic elastomer produced by the process which comprises:
a) combining
1) polyolefin particles, wherein said polyolefin particles are comprised of homopolymers or copolymers of ethylene or propylene, 2) an acrylate monomer, wherein said acrylate monomers, when polymerized, are rubber-like at room temperature and below, and 3) a free radical polymerization initiator to cause impregnation and polymerization of said acrylate to produce a dispersed phase within said polyolefin particles, wherein the polyacrylate phase is in the majority and b) elevating the temperature of the resultant mixture to cause cross linking of said acrylate wherein said polyolefin is polypropylene, polypropylene containing units derived from comonomers, polyethylene or polyethylene containing units derived from comonomers, and said acrylate monomers are alkyl acrylates, alkyl methacrylates with 4 or more carbon atoms in the alkyl chain, and alkyl acrylates and methyacrylates which contain polar groups, wherein the weight proportion between polyolefin and the polyacrylate in the blend is 0.1-5.
- 19. A thermoplastic elastomer comprising a polyolefin as a continuous-phase and polyacrylate as a soft dispersed phase, wherein said polyacrylate phase is crosslinked to said polyolefin phase such that the two phases do not undergo a phase transition during melting.
- 20. A thermoplastic elastomer according to claim 19, wherein said polyacrylate phase is in the majority.
- 21. A thermoplastic elastomer according to claim 20, wherein said polyacrylate phase has elastic properties.
- 22. The thermoplastic elastomer according to claim 19, wherein said polyacrylate phase is in the majority, has elastic properties and is cross-linked into said polyolefin phase such that the two phases do not undergo a phase transition during melting.
- 23. The thermoplastic elastomer according to any one of the claims 1, 4 or 19, wherein the polyacrylate has a glass transition temperature less than room temperature.
- 24. The thermoplastic elastomer according to claim 23, further comprising oil or fillers.
- 25. The thermoplastic elastomer according to claim 1, wherein the polyacrylate has a glass transition temperature less than room temperature, further comprising oil or fillers and non-acrylate monomers capable of free-radical polymerization.
- 26. The thermoplastic elastomer according to claim 19, wherein said polyacrylate is polybutylacrylate, wherein said polybutylacrylate phase is in the majority and is cross-linked into said polyolefin phase such that no phase transition occurs upon melting.
- 27. The thermoplastic elastomer according to claim 4, wherein said polyacrylate has a glass transition temperature less than room temperature, further comprising oils or fillers, and non- acrylate monomers capable of free-radical polymerization.
- 28. The thermoplastic elastomer according to claim 19, wherein the polyacrylate has a glass transition temperature less than room temperature, further comprising oil or fillers, and non- acrylate monomers capable of free-radical polymerization.
Priority Claims (1)
Number |
Date |
Country |
Kind |
PCT/FI94/00479 |
Oct 1994 |
FI |
|
CROSS REFERENCE TO RELATED APPLICATION
[0001] This application is a continuation of co-pending application Ser. No. 09/557,097 filed on Apr. 21, 2000, which is a continuation-in-part of application Ser. No. 08/817,918 filed Jul. 10, 1997, which is a national phase filing of PCT international application No. PCT/FI94/00479 which has an International filing date of Oct. 245, 1994 which designated the United States, the entire contents of which are hereby incorporated by reference.
Continuations (1)
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Number |
Date |
Country |
Parent |
09557097 |
Apr 2000 |
US |
Child |
10004470 |
Oct 2001 |
US |
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
08817918 |
Jul 1997 |
US |
Child |
09557097 |
Apr 2000 |
US |