초록 ▼

A release agent applied to the surface of a mold in the form of a film to permit ready removal of plastic, particularly polyurethane, from the mold. The release agent contains a film-forming substance having an affinity to the plastic and becomes attached to the plastic and is removed with the plast

A release agent applied to the surface of a mold in the form of a film to permit ready removal of plastic, particularly polyurethane, from the mold. The release agent contains a film-forming substance having an affinity to the plastic and becomes attached to the plastic and is removed with the plastic when taken out of the mold thereby preventing buildup of film-forming substance in the mold. A cross-linking agent and/or a cross-linking catalyst and/or emulsifier and/or tenside may advantageously be incorporated in the release agent.

대표청구항 ▼

A mold release agent for molds especially aluminum molds for the production of elastomer bodies from a reaction mixture containing an organic polyisocyanate and a reactive hydrogen-containing material, which comprises a liquid containing a film-forming substance having end groups selected from the g

A mold release agent for molds especially aluminum molds for the production of elastomer bodies from a reaction mixture containing an organic polyisocyanate and a reactive hydrogen-containing material, which comprises a liquid containing a film-forming substance having end groups selected from the group consisting of hydroxyl and amino end groups, which liquid, upon the application to the surface of the mold, forms a film containing a member selected from the group consisting of polyethers and polyesters with a molecular weight (average by weight) in the range of 800 to 5,000, said end groups being insufficient in activity and number to cause strong adhesion of the elastomer to the mold and prevent removal of the elastomer from the mold.