Amphiphilic triblock copolymer
Assignee3M Innovative Properties Company
InventorsApostolos Avgeropoulos, Dimitrios Moschovas, Michelle Man-Shau Mok, Timothy Martin Gillard, Carl Andrew Laskowski, Lucas David McIntosh
Life of this patent
Estimating the term…
Abstract
Amphiphilic triblock copolymers, articles containing the amphiphilic triblock copolymers, and methods of making these block copolymers provided. The amphiphilic triblock copolymers contain a first block (an A block) derived from isoprene, a second block (a B block) derived from a vinyl aromatic such as styrene, and a third block (a C block) derived from butadiene that have been subjected to hydrosilylation.
Claims18
An amphiphilic triblock copolymer comprising:
- 20 to 45 mole percent A block based on total moles of repeat units in the amphiphilic triblock copolymer, wherein the A block comprises poly(isoprene) and greater than 90 mole percent of the repeat units in the A block are of Formula (I-A)
- 40 to 65 mole percent B block based on total moles of repeat units in the amphiphilic triblock copolymer, wherein the B block comprises a poly(vinyl aromatic);
- and
- 5 to 30 mole percent C blocks based on total moles of repeat units in the amphiphilic triblock copolymer, wherein greater than 30 mole percent of the repeat units in the C block are hydrosilylated 1,2-butadiene repeat units of Formula (IV-A) and/or Formula (IV-B)
- wherein
- R1 is an alkyl or aryl;
- R2 is a group of formula —O—(R3—O)p—R4;
- and
- R3 is an alkylene;
- R4 is an alkyl;
- y is an integer equal to 1 or 2;
- p is an integer in a range of 0 to 10;
- and
- an asterisk (*) indicates a binding site to another repeat unit or terminal group of the amphiphilic triblock copolymer.
A method of forming an amphiphilic triblock copolymer, the method comprising:
- 1) Providing or obtaining a precursor triblock copolymer comprising
- 20 to 45 mole percent A1 block based on total moles of repeat units in the precursor triblock copolymer, wherein the A1 block comprises poly(isoprene) and greater than 90 mole percent of the repeat units in the A1 block are of Formula (I-A)
- 40 to 65 mole percent B1 block based on total moles of repeat units in the precursor triblock copolymer, wherein the B1 block comprises a poly(vinyl aromatic);
- and 5 to 30 mole percent C1 blocks based on total moles of repeat units in the precursor triblock copolymer, wherein greater than 30 mole percent of the repeat units in the C1 block are 1,2-butadiene repeat units of Formula (VII)
- 2) reacting the 1,2-butadiene repeat units in the C1 block of the precursor triblock copolymer with a halogenated silane of Formula (VIII)
- in the presence of an organometallic catalyst to form a halogenated intermediate triblock copolymer having repeat units of Formula (IX-A) and Formula (IX-B)
- wherein
- R1 is an alkyl or aryl;
- X is a halo;
- y is an integer equal to 1 or 2;
- and
- 3) treating the halogenated intermediate triblock copolymer with a compound of Formula (X)
- to form the amphiphilic triblock copolymer having a C block comprising repeat units of Formula (IV-A) and/or Formula (IV-B)
- wherein
- R2 is a group of formula —O—(R3—O)p—R4,
- R3 is an alkylene;
- R4 is an alkyl;
- p is an integer in a range of 0 to 10;
- and
- an asterisk (*) indicates a binding site to another repeat unit or terminal group of the precursor triblock copolymer, halogenated intermediate triblock copolymer, or amphiphilic triblock copolymer.
Dependencies are inferred from the claim text.