A heat sensitive composition suitable for preventing tissue adhesion, produced by means of a chemical reaction by spraying and stirring c) 0.01 to 2% by weight of a crosslinking agent in an aqueous solution comprising: a. 1 to 50% by weight of a block copolymer having a molecular weight of 1,000 to 500,000 g / mol and comprising a block of poly (ethylene oxide)； and b. 0.5 to 1% by weight of a polymer with a molecular weight of 10,000 to 1,000,000 g / mol capable of mixing with the block copolymer a)； wherein the crosslinking agent is one or more selected from the group consisting of compounds that include one or more cations selected from the group consisting of Mg2 +, Mn2 +, Ca2 +, Co2 +, Cu2 +, Sr2 +, Ba2 +, Fe2 +； chitosan； glutaradehyde； formalin； poly-L-lysine； polymers of acrylic acid of poly (acrylic acid) and poly (methacrylic acid)； a hydroxylamine type dopamine compound； isoleucine, phenylalanine, leucine, threonine, lysine, tryptophan, methionine, valine, histidine, alanine, arginine, asparagine, aspartate, cysteine, glutamine, glutamate, glycine, proline, serine and tyrosine； and in which the difference in viscosity between the upper and lower liquid layers is within 10% when the composition is centrifuged for 3 minutes at 3,000 rpm and 25 ° C.Una composición termosensible adecuada para prevenir la adhesión de los tejidos, producida por medio de una reacción química pulverizando y agitando c) 0,01 a 2% en peso de un agente de reticulación en una disolución acuosa que comprende: a. 1 a 50% en peso de un copolímero de bloques que tiene un peso molecular de 1.000 a 500.000 g/mol y que comprende un bloque de poli(óxido de etileno)； y b. 0,5 a 1% en peso de un polímero de un peso molecular de 10.000 a 1.000.000 g/mol capaz de mezclarse con el copolímero de bloques a)； donde el agente reticulante es uno o más seleccionado del grupo que consiste en compuestos que incluyen uno o más cationes seleccionados del grupo que consiste en Mg2+, Mn2+, Ca2+, Co2+, Cu2+,
