Patent ID: 8536269

Claim:
A peroxidic fluoropolyether with an average molecular weight of 300-5000, the acid value of 20-120 mg NaOH/g, the peroxide value of 0.5 wt %˜10.0 wt %, and having the following formula: A-O-(G f -O) m (G f -O—O) n —(CF 2 O) p —(CF 2 OO) q —(CF(CF 3 )O) r —B (I) wherein: G f is —CF 2 CF(CF 3 )— or —CF(CF 3 )CF 2 —; terminal group A is —CF 3 , —COOM or —CF 2 COOM; group B is —COOM or —CF 2 COOM; wherein, M is —H, —NH 4 or alkali metal elements; m, n, p, q and r meet the following conditions: (1) m, n, p, q, r are integers not less than zero; (2) n+q≧1; (3) n+q≦m+p+r; (4) m≧n+p+q+r; and (5) meeting the requirements of molecular weight range.