C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
402/31, 402/7.3
C08F 2/06 (2006.01) C08C 19/44 (2006.01) C08F 4/12 (2006.01) C08F 4/46 (2006.01) C08F 30/04 (2006.01) C08G 18/62 (2006.01) C08G 18/69 (2006.01) C08G 59/62 (2006.01)
Patent
CA 1054742
ABSTRACT OF THE DISCLOSURE: Sodium, potassium and lithium homopolymers and copolymers of conjugated dienes, homopolymers of vinyl monomers, and copo- lymers of conjugated dienes and vinyl monomers terminated with an aliphatic or aromatic-acetal or ketal group which is an hydroxyl carrier are produced by (a) polymerizing or copolymerizing one or more conjugated dienes containing 4 to 6 carbon atoms or (b) homopolymerizing a vinyl monomer or (c) copolymerizing such a conjugated diene and a vinyl monomer, in the presence of an initiator of the class consisting of a compound of the formula: Image or Image in which Alk Met stands for potassium, sodium or lithium, R1 is a branched- or straight-chain or cyclo-alkyle? group of 3 to 20 carbon atoms or phenylene or alkyl phenylene in which each alkyl group contains 1 to 3 carbon atoms, and R2, R3 and R4 are hydro- carbon aliphatic or aromatic substituents. These terminally reactive polymers are useful as intermediates for chain-extended polymers which may be used as adhesives, binders, potting compounds, caulking compounds, sealants, and also many types of molded articles.
187998
Halasa Adel F.
Schulz Donald N.
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