CN104556814A - Preparing method for modified carboxylic acid cement grinding aid - Google Patents
Preparing method for modified carboxylic acid cement grinding aid Download PDFInfo
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- CN104556814A CN104556814A CN201410813109.7A CN201410813109A CN104556814A CN 104556814 A CN104556814 A CN 104556814A CN 201410813109 A CN201410813109 A CN 201410813109A CN 104556814 A CN104556814 A CN 104556814A
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- grinding aid
- cement grinding
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- carboxylic acid
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Abstract
The invention discloses a preparing method of a modified carboxylic acid cement grinding aid and belongs to the technical field of building materials. The preparing method comprises the following steps: adding maleic acid, diethanolisopropanolamine, sodium dodecyl benzene sulfonate, polyethylene glycol, 2-ethly-2-hydroxymethyl-1,3-propanediol, sodium tripolyphosphate, a catalyst and an initiator into a reaction still, agitating and raising the temperature to 80 DEG C for carrying out esterification reaction, maintaining the reaction temperature for 3.5-4.5 hours, and raising the temperature to 150 DEG C for carrying out polymerization reaction so as to obtain a polycarboxylic acid cement grinding aid; after the reaction is finished, adding organosilicone-modified polyacrylate and sodium persulfate to obtain a modified polycarboxylic acid cement grinding aid. The cement grinding aid is good in stability and liquidity, effectively neutralizes active sites caused by ion key breakage in the cement powder grinding process, and meanwhile, greatly improves the compatibility with cement. The use quantity can be reduced by 10-25%.
Description
Technical field
The present invention relates to building material technical field, be specifically related to a kind of preparation method of modified carboxylic acid cement grinding aid.
Background technology
Cement grinding aid is a kind of chemical additive improving cement grinding effect and performance, can significantly improve cement unit-hour output, each length of time strength of cement, improve its mobility.Cement grinding aid significantly can reduce the electrostatic adhesion bag ball phenomenon formed in grinding process, and can reduce the again coalescent trend of the ultra-fine grain formed in grinding process.
The mainly copolymerization under initiator effect by unsaturated monomer and other monomers of polycarboxylic-acid cement grinding aid, by the polymkeric substance with grind-aiding effect that the side chain graft of band active group obtains to main chain.Although polycarboxylic-acid cement grinding aid can effectively reduce electrostatic adhesion phenomenon, but the consistency of itself and cement is not very desirable, in order to be effective, needs to strengthen usage quantity in use procedure.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of preparation method of modified carboxylic acid cement grinding aid, and this grinding aid solves existing grinding aid and the bad problem of cement consistency.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of preparation method of modified carboxylic acid cement grinding aid, comprises the following steps:
(1) in reactor, add toxilic acid, di-alcohol monoisopropanolamine, Sodium dodecylbenzene sulfonate, polyoxyethylene glycol, methyl thiazolinyl Soxylat A 25-7, tripoly phosphate sodium STPP, catalyzer, initiator, stir and be warming up to 80 DEG C and make it esterification occurs, maintain temperature of reaction 3.5-4.5 hour, be warming up to 150 DEG C and make it polymerization reaction take place, obtain poly-carboxylic-acid cement grinding aid;
(2) after completion of the reaction, add silicone-modified polyacrylate and Sodium Persulfate, obtain the poly-carboxylic-acid cement grinding aid of modification.
Further, in preparation method's preparation process of described modified carboxylic acid cement grinding aid, the weight ratio of various material is, toxilic acid 1-2 part, di-alcohol monoisopropanolamine 5-6 part, Sodium dodecylbenzene sulfonate 1-3 part, polyoxyethylene glycol 1-2 part, methyl thiazolinyl Soxylat A 25-7 1-5 part, tripoly phosphate sodium STPP 0.5-1.8 part, catalyzer 0.5-1.3 part, initiator 0.5-1.3 part, silicone-modified polyacrylate 4-5 part and Sodium Persulfate 0.5-1.3 part.
Further, described initiator is Diisopropyl azodicarboxylate.
Further, described catalyzer is the one in sulfuric acid, Phenylsulfonic acid.
The invention has the beneficial effects as follows: this cement grinding aid good stability, good fluidity, the avtive spot occurred with the bond rupture of cement milling process intermediate ion effectively, substantially increase the consistency with cement, usage quantity can reduce 10-25% simultaneously.
Embodiment
Below in conjunction with concrete implementation column, the present invention is set forth further, but do not limit the present invention.
Embodiment 1
A preparation method for modified carboxylic acid cement grinding aid, comprises the following steps:
(1) in reactor, add toxilic acid, di-alcohol monoisopropanolamine, Sodium dodecylbenzene sulfonate, polyoxyethylene glycol, methyl thiazolinyl Soxylat A 25-7, tripoly phosphate sodium STPP, catalyzer, initiator, stir and be warming up to 80 DEG C and make it esterification occurs, maintain temperature of reaction 4 hours, be warming up to 150 DEG C and make it polymerization reaction take place, obtain poly-carboxylic-acid cement grinding aid;
(2) after completion of the reaction, add silicone-modified polyacrylate and Sodium Persulfate, obtain the poly-carboxylic-acid cement grinding aid of modification.
Further, in preparation method's preparation process of described modified carboxylic acid cement grinding aid, the weight ratio of various material is, toxilic acid 1.5 parts, di-alcohol monoisopropanolamine 5 parts, Sodium dodecylbenzene sulfonate 2 parts, polyoxyethylene glycol 1 part, methyl thiazolinyl Soxylat A 25-7 2 parts, tripoly phosphate sodium STPP 1.2 parts, catalyzer 0.9 part, initiator 0.8 part, silicone-modified polyacrylate 4.5 parts and Sodium Persulfate 0.9 part.
Further, described initiator is Diisopropyl azodicarboxylate.
Further, described catalyzer is the one in sulfuric acid, Phenylsulfonic acid.
Embodiment 2
A preparation method for modified carboxylic acid cement grinding aid, comprises the following steps:
(1) in reactor, add toxilic acid, di-alcohol monoisopropanolamine, Sodium dodecylbenzene sulfonate, polyoxyethylene glycol, methyl thiazolinyl Soxylat A 25-7, tripoly phosphate sodium STPP, catalyzer, initiator, stir and be warming up to 80 DEG C and make it esterification occurs, maintain temperature of reaction 4.5 hours, be warming up to 150 DEG C and make it polymerization reaction take place, obtain poly-carboxylic-acid cement grinding aid;
(2) after completion of the reaction, add silicone-modified polyacrylate and Sodium Persulfate, obtain the poly-carboxylic-acid cement grinding aid of modification.
Further, in preparation method's preparation process of described modified carboxylic acid cement grinding aid, the weight ratio of various material is, toxilic acid 2 parts, di-alcohol monoisopropanolamine 6 parts, Sodium dodecylbenzene sulfonate 1 part, polyoxyethylene glycol 2 parts, methyl thiazolinyl Soxylat A 25-7 5 parts, tripoly phosphate sodium STPP 1.8 parts, catalyzer 1.3 parts, initiator 1.3 parts, silicone-modified polyacrylate 5 parts and Sodium Persulfate 1.3 parts.
Further, described initiator is Diisopropyl azodicarboxylate.
Further, described catalyzer is the one in sulfuric acid, Phenylsulfonic acid.
Embodiment 3
A preparation method for modified carboxylic acid cement grinding aid, comprises the following steps:
(1) in reactor, add toxilic acid, di-alcohol monoisopropanolamine, Sodium dodecylbenzene sulfonate, polyoxyethylene glycol, methyl thiazolinyl Soxylat A 25-7, tripoly phosphate sodium STPP, catalyzer, initiator, stir and be warming up to 80 DEG C and make it esterification occurs, maintain temperature of reaction 3.5 hours, be warming up to 150 DEG C and make it polymerization reaction take place, obtain poly-carboxylic-acid cement grinding aid;
(2) after completion of the reaction, add silicone-modified polyacrylate and Sodium Persulfate, obtain the poly-carboxylic-acid cement grinding aid of modification.
Further, in preparation method's preparation process of described modified carboxylic acid cement grinding aid, the weight ratio of various material is, toxilic acid 1 part, di-alcohol monoisopropanolamine 5 parts, Sodium dodecylbenzene sulfonate 1 part, polyoxyethylene glycol 1 part, methyl thiazolinyl Soxylat A 25-7 1 part, tripoly phosphate sodium STPP 0.5 part, catalyzer 0.5 part, initiator 0.5 part, silicone-modified polyacrylate 4 parts and Sodium Persulfate 0.5 part.
Further, described initiator is Diisopropyl azodicarboxylate.
Further, described catalyzer is the one in sulfuric acid, Phenylsulfonic acid.
Claims (4)
1. a preparation method for modified carboxylic acid cement grinding aid, is characterized in that, comprises the following steps:
(1) in reactor, add toxilic acid, di-alcohol monoisopropanolamine, Sodium dodecylbenzene sulfonate, polyoxyethylene glycol, methyl thiazolinyl Soxylat A 25-7, tripoly phosphate sodium STPP, catalyzer, initiator, stir and be warming up to 80 DEG C and make it esterification occurs, maintain temperature of reaction 3.5-4.5 hour, be warming up to 150 DEG C and make it polymerization reaction take place, obtain poly-carboxylic-acid cement grinding aid;
(2) after completion of the reaction, add silicone-modified polyacrylate and Sodium Persulfate, obtain the poly-carboxylic-acid cement grinding aid of modification.
2. the preparation method of modified carboxylic acid cement grinding aid according to claim 1, it is characterized in that, in preparation method's preparation process of described modified carboxylic acid cement grinding aid, the weight ratio of various material is, toxilic acid 1-2 part, di-alcohol monoisopropanolamine 5-6 part, Sodium dodecylbenzene sulfonate 1-3 part, polyoxyethylene glycol 1-2 part, methyl thiazolinyl Soxylat A 25-7 1-5 part, tripoly phosphate sodium STPP 0.5-1.8 part, catalyzer 0.5-1.3 part, initiator 0.5-1.3 part, silicone-modified polyacrylate 4-5 part and Sodium Persulfate 0.5-1.3 part.
3. the preparation method of modified carboxylic acid cement grinding aid according to claim 1 and 2, is characterized in that, described initiator is Diisopropyl azodicarboxylate.
4. the preparation method of modified carboxylic acid cement grinding aid according to claim 1 and 2, is characterized in that, described catalyzer is the one in sulfuric acid, Phenylsulfonic acid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410813109.7A CN104556814A (en) | 2014-12-24 | 2014-12-24 | Preparing method for modified carboxylic acid cement grinding aid |
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| CN201410813109.7A CN104556814A (en) | 2014-12-24 | 2014-12-24 | Preparing method for modified carboxylic acid cement grinding aid |
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| CN201410813109.7A Pending CN104556814A (en) | 2014-12-24 | 2014-12-24 | Preparing method for modified carboxylic acid cement grinding aid |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105669909A (en) * | 2015-12-28 | 2016-06-15 | 江苏中铁奥莱特新材料有限公司 | Preparation method of enhanced polyacrylamide-series cement grinding aid |
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2014
- 2014-12-24 CN CN201410813109.7A patent/CN104556814A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105669909A (en) * | 2015-12-28 | 2016-06-15 | 江苏中铁奥莱特新材料有限公司 | Preparation method of enhanced polyacrylamide-series cement grinding aid |
| CN105669909B (en) * | 2015-12-28 | 2018-01-19 | 江苏中铁奥莱特新材料股份有限公司 | A kind of preparation method of enhanced polypropylene acid amides series cement grinding aid |
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Application publication date: 20150429 |