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A platform for research: civil engineering, architecture and urbanism
HIGH SOLIDS POLYCARBOXYLATE SYNTHESIS FOR CEMENT SUPERPLASTICIZERS
The present invention provides efficient methods to form a high solids content polymeric polyacid or a comb polymer useful as a superplasticizer or dispersant which comprise heating to from 80 to 100 C for a first time period, and then, sequentially, heating to a second temperature of from 150 to 250° C. for a second time period a wet reaction mixture having a solids content of from 80 to 99 wt. % and comprising from 15 to 60 wt. % of one or more ethylenically unsaturated acid or a salt thereof, from 37 to 76.99 wt. % of one or more polyether polyols, alkyl polyether polyols, polyether amines or alkyl polyether amines in the presence of (i) from 0.01 to 1 wt. %, of one or more water soluble radical initiators or redox pairs and (ii) from 2 to 22 wt. % of one or more phosphorus oxide containing compounds, all weights based on the total weight of the wet reaction mixture.
HIGH SOLIDS POLYCARBOXYLATE SYNTHESIS FOR CEMENT SUPERPLASTICIZERS
The present invention provides efficient methods to form a high solids content polymeric polyacid or a comb polymer useful as a superplasticizer or dispersant which comprise heating to from 80 to 100 C for a first time period, and then, sequentially, heating to a second temperature of from 150 to 250° C. for a second time period a wet reaction mixture having a solids content of from 80 to 99 wt. % and comprising from 15 to 60 wt. % of one or more ethylenically unsaturated acid or a salt thereof, from 37 to 76.99 wt. % of one or more polyether polyols, alkyl polyether polyols, polyether amines or alkyl polyether amines in the presence of (i) from 0.01 to 1 wt. %, of one or more water soluble radical initiators or redox pairs and (ii) from 2 to 22 wt. % of one or more phosphorus oxide containing compounds, all weights based on the total weight of the wet reaction mixture.
HIGH SOLIDS POLYCARBOXYLATE SYNTHESIS FOR CEMENT SUPERPLASTICIZERS
FINCH WILLIAM C (author) / MCGINNIS MIKE (author) / MULIK SUDHIR M (author) / RAND CHARLES J (author)
2019-05-23
Patent
Electronic Resource
English
HIGH SOLIDS POLYCARBOXYLATE SYNTHESIS FOR CEMENT SUPERPLASTICIZERS
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