Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate
Reexamination Certificate
2005-03-08
2005-03-08
Truong, Duc (Department: 1711)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From phenol, phenol ether, or inorganic phenolate
C528S397000, C528S499000, C528S501000, C528S50200C, C528S50200C, C528S50200C
Reexamination Certificate
active
06864343
ABSTRACT:
A brominated polyphenylene oxide having a molecular skeleton obtained by condensing tribromophenols and satisfying the requirements: (A) its 20 wt. % solution in chloroform has an absorbance at 600 nm of not larger than 0.6; (B) when 50 ml of ion-exchanged water is added to its 1.00 g/30 ml solution in dioxane, the resulting solution has an electroconductivity of not larger than 10 μS/cm measured at 25° C.; and (C) when a mixture comprised of 20% by weight of the brominated polyphenylene oxide and 80% by weight of triphenyl phosphate is heated at 280° C. for 20 minutes, the halide ion increase therein is not larger than 10 μmols per gram of the brominated polyphenylene oxide, is used as a flame retardant. When it is added to resin, the resin moldings are excellent in its flame retardancy, electric properties, physical properties, thermal stability and appearance (color hue), and they do not corrode molds.
REFERENCES:
patent: 4141880 (1979-02-01), Nametz et al.
patent: 4280952 (1981-07-01), Nametz et al.
patent: 4341890 (1982-07-01), Lindvay
patent: 4353820 (1982-10-01), Lindvay
patent: 4567242 (1986-01-01), Nishibori et al.
patent: 0 149 190 (1985-07-01), None
patent: 0 288 269 (1988-10-01), None
patent: 2 014 165 (1979-08-01), None
patent: 2 023 616 (1980-01-01), None
Jul. 1, 1980 Flame Retardants: Signs of a ‘Thaw’ in R&D Agostino von Hassell Plastics Technology vol. 26, No. 8 pp. 71-74.
Dai-Ichi Kogyo Seiyaku Co. Ltd.
Jordan and Hamburg LLP
Truong Duc
LandOfFree
Brominated polyphenylene oxide and flame retardant employing... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Brominated polyphenylene oxide and flame retardant employing..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Brominated polyphenylene oxide and flame retardant employing... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3395608