Polyether Monomer VPEG ,the specialist name is Methyl Allyl Polyethenoxy Ether.It is the raw material to synthetic high performance water reducer polycarboxylate superplasticizer,it apperance is white to yellowish flake under the 25℃ .
Polycarboxylate superplasticizer is a cement dispersant used in cement concrete. Polycarboxylate superplasticizer is a hydrophilic long side chain with a certain length and quantity and a highly polar active group with diversity. The special molecular structure surfactant composed of the main chain
Chinese Youth’s Day is on May 4th, it is to in honor of the students’movement in the year of 1919, at that time, the government made a failing diplomacy in Paris, which resulted in signing the treaty of losing the land.
World Consumer Rights Day is celebrated annually by consumer organizations worldwide. It commemorates the historic declaration on March 15, 1962 by John F．Kennedy, the former US President, of the basic Rights of consumers, which include: "the right to safety", "the right to be informed"