Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Treating polymer containing material or treating a solid...
Patent
1995-04-26
1996-07-02
Acquah, Samuel A.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Treating polymer containing material or treating a solid...
528481, 528491, 528499, 528501, 528502C, 528503, C08F 600
Patent
active
055323359
ABSTRACT:
A method for thermally processing polyester pellets by crystallization and polymerization in the solid state which comprises providing a confined processing unit. The pellets are introduced to said unit along with a liquid medium. The combination of pellets and liquid medium is agitated to achieve mixing and the temperature of the agitated mixture is controlled to achieve treating of the polyester pellets in the agitated heating liquid medium at a temperature slightly below the sticking temperature of the polyester. The treatment is continued for a period sufficient to substantially increase the crystallinity and molecular weight of the polyester.
REFERENCES:
patent: 3014011 (1961-12-01), Zoetbrood et al.
patent: 4161578 (1979-07-01), Herron
patent: 4223128 (1980-09-01), Halek et al.
patent: 5090134 (1992-02-01), Russemeyer et al.
CONTINUATOR Brochure, Strong Scott Divison of Berwind Process Equipment Company, Predecessor of Hosokawa Bepex Corporation.
SOLIDAIRE Brochure, Bepex Divison of Berwind Corporation, Predecessor of Hosokawa Bepex Corporation.
Kimball Gregory J.
Pikus Ilya
Acquah Samuel A.
Hosokawa Bepex Corporation
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