Manufacture of novel epoxy resins semi-thermosets and their...

Details Manufacture of novel epoxy resins semi-thermosets and their... Manufacture of novel epoxy resins semi-thermosets and their...

2009-02-19

2011-11-15

Sellers, Robert (Department: 1765)

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

C525S481000, C525S504000, C525S508000, C525S523000, C525S533000, C528S108000, C544S090000

Reexamination Certificate

active

08058362

ABSTRACT:
An active-hydrogen-containing (carboxyl or hydroxyl) phosphorus compound is provided. An epoxy resin semi-thermoset formed by bonding the phosphorus compound to an epoxy group is also provided. A flame-retardant epoxy resin thermoset is formed after reacting the epoxy resin semi-thermoset with a curing agent. The epoxy resin thermoset possesses excellent flame retardancy, heat stability, and high glass transition temperature (Tg), does not produce toxic and corrosive fumes during combustion, and thus is an environmentally friendly flame-retardant material.

REFERENCES:
patent: 6291627 (2001-09-01), Wang et al.
patent: 7053138 (2006-05-01), Magendie et al.
patent: 7566780 (2009-07-01), Lin et al.
Sponton et al., “Development of a DOPO-containing benzoxazine and its high-performance flame retardant copolybenzoxazines,” Polymer Degradation and Stability, vol. 94, Jul. 1, 2009, pp. 1693-1699.

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