Protected functional initiators for making terminally functional

Details Protected functional initiators for making terminally functional Protected functional initiators for making terminally functional

1994-03-31

1995-05-16

Teskin, Fred

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

5253319, 525338, 525385, 526173, 526178, 526335, 556482, 556465, 502157, 502158, C08F 3606, C08F 448, C07F 704

Patent

active

054161681

ABSTRACT:
The anionic polymerization of unsaturated monomers with functionalized initiators having the structure R.sup.1 R.sup.2 R.sup.3 Si--O--A'--Li is improved when each R is methyl and A' is --CH.sub.2 --C.sub.6 H.sub.10 --CH.sub.2 -- or --CH.sub.2 --CR'R"--CH.sub.2 -- wherein R' is a linear alkyl having from 1 to 10 carbon atoms and R" is hydrogen or a linear alkyl having from 1 to 10 carbon atoms. This initiator provides process and product advantages over all other known initiators of the same type.

REFERENCES:
patent: 3324089 (1967-06-01), Trepka
patent: 3555066 (1971-01-01), Le Grow
patent: 3769266 (1973-10-01), Nametkin et al.
patent: 3929850 (1975-12-01), Streck et al.
patent: 5081191 (1992-01-01), Quirk
patent: 5153291 (1992-10-01), Leitz et al.
patent: 5331058 (1994-07-01), Shepherd et al.
patent: 5362699 (1994-11-01), Shepherd et al.

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