Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Patent
1987-12-04
1990-02-20
Anderson, Harold D.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From carboxylic acid or derivative thereof
528304, 528 38, 528 39, 528 40, C08G 6352, C08G 6354
Patent
active
049027735
ABSTRACT:
The invention relates to the acceleration of the synthesis of unsaturated polyesters containing maleic acid/anhydride, 1 to 30 percent, preferably 5 to 15 percent of the prescribed maleic acid/anhydride is introduced into the reaction mixture in total or in two or more increments at the stage of the reaction when the acid number or the molecular weight of the mixture has reached about 50 to 250 or about 300 to 1500, respectively. Thus, the rate of polyesterification can be increased considerably, occasionally two-folds and, in addition, polyester resins of very low acid number or high molecular weight can be prepared.
REFERENCES:
patent: 2877203 (1959-03-01), Forsythe et al.
patent: 3150208 (1964-09-01), Carson et al.
patent: 3222421 (1965-12-01), Lundberg
patent: 3238274 (1966-03-01), Allan
patent: 3355408 (1967-11-01), Mayer et al.
patent: 3546176 (1970-12-01), Umfreville et al.
patent: 3592874 (1971-07-01), Reese et al.
patent: 3838106 (1974-09-01), Shaki et al.
patent: 3923927 (1975-12-01), Miyake et al.
patent: 4569986 (1986-02-01), Oshima et al.
patent: 4663393 (1987-05-01), Arlaud et al.
patent: 4684695 (1987-08-01), Oshima et al.
Bodnar Akos
Solymoss Maria
Szigeti Istvan
Szommer Laszlo
Vancson Szmercsanyi Ibolya
Anderson Harold D.
Daley Dennis R.
Nitrokemia Ipartelepek
LandOfFree
Method of preparation of unsaturated polyester resins from malei does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of preparation of unsaturated polyester resins from malei, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of preparation of unsaturated polyester resins from malei will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1616939