Increasing the molecular weight of polycondensates and stabilizi

Details Increasing the molecular weight of polycondensates and stabilizi Increasing the molecular weight of polycondensates and stabilizi

1999-01-20

2000-02-22

Sanders, Kriellion

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

Synthetic resins

Processes of preparing a desired or intentional composition...

524 99, 524102, 524125, 524492, 528492, C08K 534, C08K 553, C08K 334

Patent

active

060281294

ABSTRACT:
The invention relates to a process for increasing the molecular weight of polycondensates and at the same time stabilizing them, essentially without crosslinking, which comprises heating a polyamide, a polyester, a polycarbonate or a copolymer or blend of these polymers with addition of at least one diepoxide comprising terminal epoxide groups and as a further structural element a tetramethylpiperidine radical located centrally between the epoxide groups to a temperature which is above the melting point of the polymer in the case of crystalline polycondensates or above the glass point in the case of amorphous polycondensates. The invention additionally relates to mixtures comprising the corresponding diepoxides, to their use, and to polycondensates prepared from them.

REFERENCES:
patent: 3377316 (1968-04-01), Reinking et al.
patent: 3692778 (1972-09-01), Murayama et al.
patent: 4703072 (1987-10-01), Helwig et al.
patent: 5747606 (1998-05-01), Pfaendner et al.
patent: 5807966 (1998-09-01), Pfaendner et al.
R.-E. Grutzner et al., Kunststoffe, 82, (1992), 4, pp. 284-288.
S. Fakirov, Kunststoffe, 74, (1984), 4, pp. 218-221.
Chem Abstr. 91:124534a.
Derwent Abstr. 91-030649 for EP 410230.
Chem. Abstr. 1984:492273 for Kunststoffe 74, (1984), 4 pp. 218-221.

Affiliated with

Also associated with

Rating

Increasing the molecular weight of polycondensates and stabilizi does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Increasing the molecular weight of polycondensates and stabilizi, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Increasing the molecular weight of polycondensates and stabilizi will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-521115