Aminosilane Initiators And Functionalized Polymers Prepared Therefrom
AssigneeBridgestone Corporation
InventorsDavid F. Lawson, Terrence E. Hogan, Christine Rademacher, David M. Roggeman, Fuminori Ota
Life of this patent
Estimating the term…
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. A telechelic polymer may result from use of the metallated aminosilane compound as a functional terminator.
Claims20
1-34. (canceled)
A metallated aminosilane compound for initiating an anionic polymerization comprising the reaction product of
- (1) at least one metallating agent;
- and
- (2) at least one alkenylaminosilane 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 each R is independently a hydrogen, alkyl or aryl group;
- where each R1 is independently a hydrocarbyl group;
- where each R2 is independently a hydrocarbyl group having between 2 and 12 carbon atoms;
- where each R3 is independently a hydrocarbylene group having between 2 and 12 carbon atoms;
- and where one or more R2 may form a bridge between two nitrogen atoms when m is greater than 1.
A process for producing an aminosilane-functionalized polymer comprising the steps of:
- (a) providing an initiator formed in situ by mixing at least one type of anionically polymerizable monomer with at least one alkenylaminosilane 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 each R is independently a hydrogen, alkyl or aryl group;
- where each R1 is independently a hydrocarbyl group;
- where each R2 is independently a hydrocarbyl group having between 2 and 12 carbon atoms;
- where each R3 is independently a hydrocarbylene group having between 2 and 12 carbon atoms;
- and where one or more R2 may form a bridge between two nitrogen atoms when m is greater than 1;
- and thereafter
- (b) adding at least one metallating agent to the mixture, thereby metallating the alkenylaminosilane and initiating polymerization of the at least one type of anionically polymerizable monomer.
A telechelic polymer made by a method comprising the steps of:
- (a) initiating polymerization of at least one type of anionically polymerizable monomer by using an initiator comprising the reaction product of at least one metallating agent and 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 X is a methyl, ethyl, propyl, alkenyl, or allylic group;
- where each R7 and R8 is independently a hydrocarbyl group;
- where each R9 is independently a hydrocarbylene group;
- and where one or more R8 may form a bridge between two nitrogen atoms when m is greater than 1,
- (b) propagating the polymerization of at least one type of anionically polymerizable monomer;
- and
- (c) providing a functional terminator, thereby producing a polymer that includes at least one aminosilane group at the head of the polymer and at least one functional group at the tail of the polymer.
A polymer composition comprising an elastomeric polymer having functionalized chain ends represented by the formula
- where a and d are whole number between 0-2, and b, c, e, and f are whole numbers between 0-3, with the proviso that the sum of b and c must be greater than zero, the sum of e and f must be greater than zero, the sum of a, b, and c equals 3, and the sum of d, e, and f equals 3;
- where Z is a hydrocarbyl group having from 1 to 20 carbon atoms;
- where each R13 is independently a hydrogen or hydrocarbyl group;
- where each R10 is independently an alkyl or aryl group;
- where each R11 is independently a hydrocarbyl group having between 2 and 12 carbon atoms;
- where each R12 is independently a hydrocarbylene group having between 2 and 12 carbon atoms;
- and where one or more R11 may form a bridge between two nitrogen atoms when b is greater than 1.
A polymer made by a method comprising the steps of:
- (a) initiating polymerization of at least one type of anionically polymerizable monomer by using an initiator comprising the reaction product of at least one metallating agent and 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 X is a methyl, ethyl, propyl, or allylic group;
- where each R7 and R8 is independently a hydrocarbyl group;
- where each R9 is independently a hydrocarbylene group;
- and where one or more R8 may form a bridge between two nitrogen atoms when m is greater than 1,
- (b) propagating the polymerization of at least one type of anionically polymerizable monomer;
- and
- (c) quenching the polymerization by exposing the living polymer to a proton source.
Dependencies are inferred from the claim text.