Halogen-free fire retardant system for low heat release...

Details Halogen-free fire retardant system for low heat release... Halogen-free fire retardant system for low heat release...

2008-05-27

2008-05-27

Sanders, Kriellion A (Department: 1796)

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

Synthetic resins

Processes of preparing a desired or intentional composition...

C524S101000, C524S115000, C524S195000, C524S291000, C524S404000, C524S405000, C524S423000, C524S430000, C524S449000, C524S494000, C252S609000

Reexamination Certificate

active

10771916

ABSTRACT:
An intumescent fire retardant system for making polymeric moldings that is halogen-free and provides fire shielding, thermal shielding and a low heat release rate. The intumescent fire retardant system of the present invention comprises, on the basis of 100 parts by weight blended mixture, 20-45 parts of a polymeric binder based on high density polyethylene and an α-olefin-containing copolymer, such as linear low density polyethylene, and 5-25 parts of a nitrogenous gas-generating agent, 10-30 parts of a water vapor-generating agent, 1-5 parts of an antioxidant, and 0-15 parts of a reinforcing agent. The fire retardant system of the present invention is essentially halogen-free.

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