Download Fire Retardant Paints (Advances in Chemistry Series 009) by Mark W. Westgate (Editor) PDF

By Mark W. Westgate (Editor)

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Test samples are preconditioned i n a specified atmosphere before exposure, and the test flame exposure is continued for 10 minutes unless the sample is c o m p l e t e l y consumed before that t i m e . Observations of the spread of flame are made at 15second intervals during the test. If the flame spread reaches only part of the distance between the end of the test flame and the end of the sample, the percentage of the distance traveled establishes the classification. If the flame spread reaches the end of the tunnel, the percentage of the t i m e required against the t i m e for the red oak In FIRE RETARDANT PAINTS; Advances in Chemistry; American Chemical Society: Washington, DC, 1954.

A d d i t i o n a l work is now i n progress to improve further the qualities of these fireretardant coatings, particularly i n finish washability and i n reducing the coating cost. Several promising coatings are now i n the laboratory stage. A d d i t i o n a l laboratory work is also i n progress with integral treatments. Several tests have been developed to evaluate fire-retardant coatings on acousti­ c a l fiberboard surfaces. These tests are being reviewed and modified where there is necessity for standardization of the test.

Factory M u t u a l Room Burn Out Test. This method involves the use of a special test room. The particular one referred to is located at Factory Mutual Laboratories, Norwood, Mass. It is 14 χ 20 feet i n area and 12 feet high, constructed of spruce studs and roof joists, with a floor of Douglas fir sheathing on spruce runners l a i d on a concrete floor underneath. The interior surfaces of walls and c e i l i n g are covered with 1/4 inch soft asbestos board. Thermocouples are located so as to record temper­ atures i n the corners and center of the room at both the c e i l i n g and breathing levels.

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