Aminosilane initiators and functionalized polymers prepared therefrom
AssigneeBridgestone Corporation
InventorsDavid F. Lawson, Terrence E. Hogan, Christine M. Rademacher, David M. Roggeman, Fuminori Ota
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Abstract
Metallated aminosilane compounds for use as functional initiators in anionic polymerizations and processes for producing an aminosilane-functionalized polymer using the metallated aminosilane compounds to initiate anionic polymerization of at least one type of anionically polymerizable monomer. Preferred use of the metallated aminosilane compounds results in rubber compositions for use in tires comprising an aminosilane functionalized polymer.
Claims20
A process for producing an aminosilane-functionalized polymer comprising the steps of:
- (a) providing a pre-formed initiator by preparing a metallated aminosilane compound by reacting:
- (1) at least one metallating agent including a metal, and
- (2) at least one aminosilane compound having the formula
- where n is a whole number selected from the group consisting of 0-2, and m is a whole number selected from the group consisting of 1-3, with the proviso that the sum of m and n equals 3;
- where T is a methyl, ethyl, propyl, or allylic group;
- where each R4 and R5 is independently a hydrocarbyl group;
- where each R6 is independently a hydrocarbylene;
- and where one or more R5 may form a bridge between two nitrogen atoms when m is greater than 1, and
- (b) polymerizing monomers by using the metallated aminosilane compound to initiate the polymerization wherein the monomers consist of 1,3-butadiene optionally in combination with styrene,
- thereby producing an aminosilane functionalized polymer which comprises at least one aminosilane group at its head only, where the at least one aminosilane group comprises residue from the metallated aminosilane compound.
A process for producing an aminosilane-functionalized polymer comprising the steps of:
- (a) preparing a metallated aminosilane initiator by reacting:
- (1) at least one metallating agent including a metal, and
- (2) at least one aminosilane compound having the formula
- where n is a whole number selected from the group consisting of 0-2, and m is a whole number selected from the group consisting of 1-3, with the proviso that the sum of m and n equals 3;
- where T is a methyl, ethyl, propyl, or allylic group;
- where each R5 is independently a hydrocarbyl group;
- where each R4 is phenyl when n is 1 or 2;
- where each R6 is independently a hydrocarbylene;
- and where one or more R5 may form a bridge between two nitrogen atoms when m is greater than 1, and
- (b) polymerizing monomers by using the metallated aminosilane initiator to initiate the polymerization wherein the monomers consist of 1,3-butadiene,
- thereby producing an aminosilane functionalized polymer which comprises at least one aminosilane group at its head only, where the at least one aminosilane group comprises residue from the metallated aminosilane initiator.
A process for producing an aminosilane-functionalized polymer comprising the steps of:
- (a) preparing a metallated aminosilane initiator by reacting:
- (1) at least one metallating agent including a metal, and
- (2) at least one aminosilane compound having the formula
- where n is a whole number selected from the group consisting of 0-2, and m is a whole number selected from the group consisting of 1-3, with the proviso that the sum of m and n equals 3;
- where T is a methyl, ethyl, propyl, or allylic group;
- where each R5 is independently a hydrocarbyl group;
- where each R4 is phenyl when n is 1 or 2;
- where each R6 is independently a hydrocarbylene;
- and where one or more R5 may form a bridge between two nitrogen atoms when m is greater than 1, and
- (b) polymerizing monomers by using the metallated aminosilane initiator to initiate the polymerization wherein the monomers consist of 1,3-butadiene and styrene,
- thereby producing an aminosilane functionalized polymer which comprises at least one aminosilane group at its head only, where the at least one aminosilane group comprises residue from the metallated aminosilane initiator.
Dependencies are inferred from the claim text.