Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1986-02-28
1987-11-24
Jacobs, Lewis T.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
525 91, 525123, 525130, 525355, 525358, 525366, C08F 830, C08L 4700
Patent
active
047089873
ABSTRACT:
A process for the rapid bulk polymerization of polybutadiene
ylon-6 block copolymers comprises the steps of preparing a mixture comprising from about 100 to about 50 parts by weight of a low molecular weight polybutadiene terminated by an isocyanate or isothiocyanate and end-capped with caprolactam providing a stable imide type terminated polymer, with from about 0 to about 50 parts by weight of a dry non-cold flowing rubber neutralized with caprolactam, charging the polymer mixture without hydrolyzing the end-capped polybutadiene to a reaction vessel with caprolactam and polymerizing the caprolactam at a temperature sufficient to flash off any solvents introduced during the step of preparing to form a block copolymer with the end-capped polybutadiene. The process of the present invention is also applicable to the rapid polymerization of other block copolymers formed from anionically polymerized cold flowing rubbers terminated by a compound selected from the group consisting of isocyanates and isothiocyanates and end-capped with an amide containing compound providing a stable imide type terminated rubber and mixed with a non-cold flowing rubber terminated with an amide containing compound which mixture is then charged to a reaction vessel without hydrolyzation with a monomer having an active hydrogen other than a monomer utilized to form a polymer present in the polymer mixture and polymerizing the monomer at a temperature sufficient to flash off any solvents introduced during the step of preparing.
REFERENCES:
patent: 3838108 (1974-09-01), Hergenrother et al.
patent: 4070344 (1978-01-01), Hergenrother et al.
Greenstreet Arthur W.
Hergenrother William L.
Carrillo A.
Jacobs Lewis T.
The Firestone Tire & Rubber & Company
Troy, Sr. Frank J.
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