Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Patent
1980-06-02
1981-07-28
Anderson, Harold D.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From carboxylic acid or derivative thereof
528312, 528319, 528326, C08G 6924
Patent
active
042811058
ABSTRACT:
A process for polymerizing 2-pyrrolidone to form a particulate material suitable for melt extrusion processes is disclosed. The process involves agitating to form particles at a critical point during the polymerization in which a friable gel exists. The gel is formed as a result of the addition of polymerization accelerators to the polymerization mixture but as the accelerated polymerization proceeds the gel soon hardens to a tough cake which can no longer be broken up by agitation. If the polymerizing mixture is agitated before the formation of the gel only very fine particles are formed.
REFERENCES:
patent: 2638463 (1953-05-01), Ney et al.
patent: 2739959 (1956-03-01), Ney et al.
patent: 2809958 (1957-10-01), Barnes et al.
patent: 2973343 (1961-02-01), Ney
patent: 2999852 (1961-09-01), Renfrew et al.
patent: 3060153 (1962-10-01), Follen
patent: 3069392 (1962-12-01), Clark et al.
patent: 3174951 (1965-03-01), Taber
patent: 3213066 (1965-10-01), Renfrew
patent: 3721652 (1970-09-01), Barnes
patent: 3835100 (1974-09-01), Sekiguchi et al.
patent: 4017465 (1977-04-01), Bacskai
patent: 4098774 (1978-07-01), Bacskai
Die Makromolekulare Chemie, 161 (1972), p. 64.
Barnes Arthur C.
Barnes Carl E.
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