Patent ID: 7776803

Claim:
A process for working a material comprising: a) Providing the material b) Providing equipment means to work the material c) Providing a reverse thermal fluid at a temperature below its transition temperature d) Using the equipment means to work the material so that friction is created, heat is generated and the temperature of the material is increased e) Applying the reverse thermal fluid to the material or to the equipment means to work the material, or to both the material and to the equipment means to work the material before or during the process of working so that the temperature of the reverse thermal fluid increases above its transition temperature and its viscosity increases In which said reverse thermal fluid comprises an aqueous solution of a poloxamer or mixture of poloxamers in which the concentration of poloxamer or mixture of poloxamers is greater than about 18% by weight in which said poloxamer or mixture of poloxamers consists of polyoxyethylene units and polyoxypropylene units in which a visible layer of the reverse thermal fluid with temperature above its transition temperature and with increased viscosity adheres to the material.