Synthesis of poly (arylene ether)-poly(organosiloxane) copolymers
US6339131B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 6, 1999 |
| Grant date | Jan 15, 2002 |
| Priority date | — |
| Expiry date | Dec 6, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L71/126
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A method comprising(a) synthesis of a poly(arylene ether) having the structure (1) wherein m is an integer having an average value in the range from about 3 to about 300;(b) solution functionalization of polymer (1) to form functionalized poly(arylene ether) having the structure (2) wherein X is a reactive functional group selected from the group consisting of anhydride, hydroxyl, epoxy, carboxyl, —R1OH, R1CO2R2, —R1CH2═CH2, or vinyl, wherein R1 is a primary or secondary divalent alkyl or haloalky group having from 1 to 20 carbons, or an aryl group and R2 is a primary or secondary alkyl group having from 1 to 10 carbons; and Q4 is hydrogen, X, or a mixture thereof;(c) reaction of functionalized poly(arylene ether) (2) with a poly(organosiloxane) having structure (3): wherein x is zero or one and Y is a functional group reactive with X, selected from the group consisting of —OH, —CH2═CH2, epoxy, amino, carboxy, —C(O)CH2OH, or hydrogen, to form a poly(arylene ether)-poly(siloxane) copolymer, wherein the functionalization is in solution, and copolymer synthesis and isolation are effected by first solution and then melt copolymerization.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.