초록 ▼

A release agent comprising a mixture of (A) a dimethylpolysiloxane and (B) an organopolysiloxane with phenolic hydroxyl groups, said mixture having an average phenol equivalent within the range of 10,000 to 5,000,000 and a dimethylsiloxane oligomer with less than 20 silicon atoms in an amount of les

A release agent comprising a mixture of (A) a dimethylpolysiloxane and (B) an organopolysiloxane with phenolic hydroxyl groups, said mixture having an average phenol equivalent within the range of 10,000 to 5,000,000 and a dimethylsiloxane oligomer with less than 20 silicon atoms in an amount of less than 5,000 ppm, said agent having a viscosity within the range of 5.times.10.sup.-5 to 1.times.10.sup.-1 m.sup.2 /s at 25.degree. C. The release agent of the present invention possesses excellent heat-resistant and release properties, and suppresses formation of formaldehyde under the effect of thermal decomposition.

대표청구항 ▼

[ That which is claimed is:] [1.] A release agent composition, comprising:(A) a material comprising a dimethylpolysiloxane and(B) a material comprising an organopolysiloxane having phenolic groups, rein the composition has an average phenol equivalent of from 10,000 to 5,000,000, contains less than

[ That which is claimed is:] [1.] A release agent composition, comprising:(A) a material comprising a dimethylpolysiloxane and(B) a material comprising an organopolysiloxane having phenolic groups, rein the composition has an average phenol equivalent of from 10,000 to 5,000,000, contains less than 5,000 ppm of a dimethylsiloxane oligomer having less than 20 silicon atoms, and has a viscosity of from 5.times.10.sup.-5 to 1.times.10.sup.-1 m.sup.2 /s at 25.degree. C.