초록 ▼

A seal material having improved sealing characteristics and useful in high temperature, corrosive environments, particularly fuel cells is disclosed. The material comprises an acid resistant, high temperature stable fluorinated elastomer and a blowing agent which activate at a temperature within the

A seal material having improved sealing characteristics and useful in high temperature, corrosive environments, particularly fuel cells is disclosed. The material comprises an acid resistant, high temperature stable fluorinated elastomer and a blowing agent which activate at a temperature within the range of curing temperatures of the elastomer. Improved sealing characteristics due to volume expansion of the seal material applied and activated within the fuel cell were observed. The process of activating the seal material at the operating temperature of the fuel cell is also disclosed. The invention also discloses the process of using the seal material within a fuel cell.

대표청구항 ▼

A phosphoric acid fuel cell having a fuel cell housing containing a fuel cell stack which is comprised of layered fuel cell plates having edges including adjacent anode and cathode plates having small gaps therebetween for containing an electrolyte solution including seal material which forms a seal

A phosphoric acid fuel cell having a fuel cell housing containing a fuel cell stack which is comprised of layered fuel cell plates having edges including adjacent anode and cathode plates having small gaps therebetween for containing an electrolyte solution including seal material which forms a seal between the edges of adjacent anodes and cathode plates wherein the improvement comprises: using a seal material comprising: a corrosion resistant, high temperature stable fluorinated hydrocabon elastomer; a blowing agent which activates within the range of curing temperatures of the fluorinated hydrocarbon elastomer so as to produce a fully cured closed cell elastomer; resulting in improved sealing between structural irregularities in the fuel cell.