Process for modifying unsaturated polyester systems

Details Process for modifying unsaturated polyester systems Process for modifying unsaturated polyester systems

1975-11-12

1977-09-20

Tillman, Murray

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 25N, 260 292UA, 260 296TA, 260 296CM, 260 296MN, 260 40R, 260 75T, 260 75H, 2603976, 260551S, 260861, 260862, 260865, 260869, 260DIG24, C08L 6312, C08L 6706

Patent

active

040496090

ABSTRACT:
Unsaturated polyester resin systems are modified to provide a curable, stable water-in-oil emulsion by reacting the resin system with a hydrolized source of hypochlorite ion, while maintaining during the reaction a pH of at least 4, whereby the reaction is predominantly one of chlorohydration. The hypochlorite ion may be provided by addition of an aqueous solution of an inorganic salt of hypochlorous acid, e.g. by an aqueous solution of sodium, potassium, lithium, or calcium hypochlorite; or by an aqueous solution of a suitable chloramine; or the additive may comprise the reaction product of a chloramine with an aqueous solution of an inorganic salt of hypochlorous acid. The modified resin system yielded by the invention may include over 50% by weight of water; and high quantities of conventional fillers may be added without disrupting the emulsion. The cured products yielded from the modified resin systems have excellent mechanical characteristics, and are highly flame-retardant.

REFERENCES:
patent: 3591191 (1971-07-01), Coderre et al.
patent: 3687883 (1972-08-01), Korf
patent: 3726819 (1973-04-01), Dijkhuizen
patent: 3806563 (1974-04-01), Lammers
patent: 3845067 (1974-10-01), Lopez
patent: 3923704 (1975-12-01), Gunning et al.
Leitheiser et al., Water Extended-Polyester Resin, SPE Journal, Oct. (1969) vol. 25, pp. 41-45.

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