Normal-temperature synthetizing method for slow release type polycarboxylate water-reducer and product produced by same

The invention provides a normal-temperature synthetizing method for a slow release type polycarboxylate water-reducer and a product produced by the same. The method comprises the following steps: bottom materials of unsaturated polyoxyethylene ether, fumaric acid and water are put in a reaction kettle to be stirred until the bottom materials are dissolved, after the bottom materials are completely dissolved, an oxidizer solution is put, materials A and materials B, which are compounded in advance, are dripped at the same time, the dripping time of the materials A is 2-3 hours, the dripping time of the materials B is 2.5-3.5 hours, after the materials B are dripped, the reaction is continued for 1-2 hours, and liquid alkali is used for neutralizing until the pH is 6-7; the materials A comprise a comonomer, a slow release monomer and water; the materials B comprise a chain transfer agent, a reducing agent and water. The product disclosed by the invention has the advantages of strong adaptability, stable performance, high long-term storage quality and definite water reducing rate, can be singly used, and can be compounded with an ordinary polycarboxylate water-reducer for use. The method selects normal-temperature synthesis, the synthesis operation is simple and easy, energy resources are saved, the water is used as a solvent for performing the synthesis, and an organic solvent is not used, so that the method is environmental-friendly.