Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Preparation method of polycarboxylate water reducer containing polyether side chains
The invention provides a preparation method of a polycarboxylate water reducer containing polyether side chains. The preparation method comprises the following steps: firstly, carrying out copolymerization on terminal alkenyl-containing alcohol and unsaturated carboxylic acid or anhydride to prepare a copolymer; and then carrying out oxyalkylation reaction on the obtained copolymer and epoxyalkane to obtain the polycarboxylate water reducer. The preparation method provided by the invention firstly prepares a main chain structure of the polycarboxylate water reducer through copolymerization and then forms the polyether side chains through oxyalkylation reaction. As the double bonds of a polymer monomer forming the main chain structure are not damaged, the double bond retention rate of the monomer is high, the polymerization effect is relatively good, and the viscosity of the obtained polycarboxylate water reducer is relatively high. The polycarboxylate water reducer prepared by the preparation method is obviously superior to that of a product prepared by the existing preparation method in concrete application performance. The preparation method provided by the invention is simple and convenient in process, mild in condition and strong in operability.
Preparation method of polycarboxylate water reducer containing polyether side chains
The invention provides a preparation method of a polycarboxylate water reducer containing polyether side chains. The preparation method comprises the following steps: firstly, carrying out copolymerization on terminal alkenyl-containing alcohol and unsaturated carboxylic acid or anhydride to prepare a copolymer; and then carrying out oxyalkylation reaction on the obtained copolymer and epoxyalkane to obtain the polycarboxylate water reducer. The preparation method provided by the invention firstly prepares a main chain structure of the polycarboxylate water reducer through copolymerization and then forms the polyether side chains through oxyalkylation reaction. As the double bonds of a polymer monomer forming the main chain structure are not damaged, the double bond retention rate of the monomer is high, the polymerization effect is relatively good, and the viscosity of the obtained polycarboxylate water reducer is relatively high. The polycarboxylate water reducer prepared by the preparation method is obviously superior to that of a product prepared by the existing preparation method in concrete application performance. The preparation method provided by the invention is simple and convenient in process, mild in condition and strong in operability.
Preparation method of polycarboxylate water reducer containing polyether side chains
ZHU JIANMIN (Autor:in) / LIU ZHAOBIN (Autor:in) / DONG ZHENPENG (Autor:in) / ZHOU LIMING (Autor:in) / ZHANG NAN (Autor:in)
10.06.2015
Patent
Elektronische Ressource
Englisch
IPC:
C08G
MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
,
Makromolekulare Verbindungen, anders erhalten als durch Reaktionen, an denen nur ungesättigte Kohlenstoff-Kohlenstoff-Bindungen beteiligt sind
/
C04B
Kalk
,
LIME
/
C08F
MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
,
Makromolekulare Verbindungen, erhalten durch Reaktionen, an denen nur ungesättigte Kohlenstoff-Kohlenstoff-Bindungen beteiligt sind
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