Claims
- 1. A process for preparing a modified diene polymer which comprises reacting an alkali metal-containing conjugated diene polymer with an aminosilane compound of the formula (2): ##STR7## wherein each of R.sup.5, R.sup.6 and R.sup.7 is an alkyl group or an alkoxy group, each of R.sup.8 and R.sup.9 is an alkyl group, and n is an integer, said alkali metal-containing conjugated diene polymer being a living polymer having an alkali metal end prepared by a polymerization of a conjugated diene monomer or a mixture of a conjugated diene monomer and an aromatic vinyl monomer in a hydrocarbon solvent in the presence of an alkali metal-based catalyst, or a polymer to which an alkali metal is introduced by an addition reaction of a diene polymer having conjugated diene units in the polymer chain and an alkali metal-based catalyst in a hydrocarbon solvent.
- 2. The process of claim 1, wherein said alkali metal-based catalyst is a member selected from the group consisting of an alkali metal, an alkali metal hydrocarbon compound and a complex of an alkali metal with a polar compound.
- 3. The process of claim 1, wherein 0.05 to 10 moles of the modifier is used per mole of said alkali-metal based catalyst used in the preparation of said alkali-metal containing conjugated diene polymer.
- 4. The process of claim 1, wherein said alkali-metal containing conjugated diene polymer is in the form of a solution in a hydrocarbon solvent.
- 5. The process of claim 1, wherein the reaction of the alkali-metal containing conjugated diene polymer and the modifier is carried out at a temperature of from room temperature to 100.degree. C.
- 6. A rubber composition comprising a rubber component containing at least 10% by weight of a modified diene polymer and rubber additives, said modified diene polymer being a conjugated diene polymer modified by reacting an alkali metal-containing conjugated diene polymer selected from the group consisting of a conjugated diene polymer having an active metal end and an alkali metal addition product of a conjugated diene polymer with an aminosilane compound of the formula (2): ##STR8## wherein each of R.sup.5, R.sup.6 and R.sup.7 is an alkyl group or an alkoxy group, each of R.sup.8 and R.sup.9 is an alkyl group, and n is an integer.
Priority Claims (6)
Number |
Date |
Country |
Kind |
61-287091 |
Dec 1986 |
JPX |
|
61-315210 |
Dec 1986 |
JPX |
|
61-315211 |
Dec 1986 |
JPX |
|
62-19262 |
Jan 1987 |
JPX |
|
62-19263 |
Jan 1987 |
JPX |
|
62-32782 |
Feb 1987 |
JPX |
|
Parent Case Info
This is a division of application Ser. No. 415,380 filed Sept. 29, 1989, now U.S. Pat. No. 4,957,976, which is a continuation of application Ser. No. 126,338, filed Nov. 30, 1987, now abandoned.
US Referenced Citations (15)
Foreign Referenced Citations (3)
Number |
Date |
Country |
2073004 |
Oct 1971 |
FRX |
2251567 |
Jun 1975 |
FRX |
59-117514 |
Jul 1984 |
JPX |
Divisions (1)
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Number |
Date |
Country |
Parent |
415380 |
Sep 1989 |
|
Continuations (1)
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Number |
Date |
Country |
Parent |
126338 |
Nov 1987 |
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