KR960014060A - Manufacturing method of water-resistant dispersant for cement - Google Patents
Manufacturing method of water-resistant dispersant for cement Download PDFInfo
- Publication number
- KR960014060A KR960014060A KR1019940026065A KR19940026065A KR960014060A KR 960014060 A KR960014060 A KR 960014060A KR 1019940026065 A KR1019940026065 A KR 1019940026065A KR 19940026065 A KR19940026065 A KR 19940026065A KR 960014060 A KR960014060 A KR 960014060A
- Authority
- KR
- South Korea
- Prior art keywords
- cement
- reaction
- water
- naphthalenesulfonic acid
- formaldehyde
- Prior art date
Links
Abstract
본 발명은 수경성 시멘트에 배합하여 사용하는 시멘트용 감수분산제중의 하나인 나프탈렌술폰산의 포름알데히드 축합물의 제조방법에 관한 것이다. 종래의 제조방법과 동일하게 나프탈렌을 슬폰화반응을 시킨 후에 나프탈렌술폰산을 포름알데히드로 축합시키는 반응 도중에 평균 분자량이 100이상인 포리에틸렌글리콜을 첨가하여 축합반응의 시간을 단축시킬 뿐만 아니라 나프탈렌술폰산의 포름알데히드 축합물의 평균 분자량이 적정한 수준이 되도록 축합반응을 조절하는 효과를 거두게 된다. 그 이후의 제조 방법은 종래의 방법과 동일하지만 반응속도가 빠르기 때문에 축합반응의 시간을 크게 단축할 수 있으며, 종래의 제조방법보다 저가(低價)인 저순도 나프탈렌을 사용하여도 감수분산제의 성능(초기 분산성이 우수할 뿐만 아니라 시간이 경과하여도 양호한 분산서을 유지하는 성능)을 대폭 향상시킬 수 있는 시멘트용 감수분산제의 제조방법을 제공하는 것이다.The present invention relates to a method for producing a formaldehyde condensate of naphthalenesulfonic acid, which is one of the water-sensitive dispersants for cement used in combination with hydraulic cement. In the same manner as in the conventional production method, the naphthalene sulfonation reaction is followed by the addition of polyethyleneglycol having an average molecular weight of 100 or more during the reaction to formaldehyde condensation of naphthalenesulfonic acid to shorten the time of the condensation reaction, as well as to formaldehyde of naphthalenesulfonic acid. The condensation reaction is controlled so that the average molecular weight of the condensate is an appropriate level. Subsequent manufacturing methods are the same as those of the conventional method, but the reaction speed is fast, so that the condensation reaction time can be shortened significantly. It is to provide a method for producing a water-sensitive dispersant for cement which can significantly improve the performance of not only excellent initial dispersibility but also maintaining a good dispersion even over time.
Description
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019940026065A KR960014060A (en) | 1994-10-10 | 1994-10-10 | Manufacturing method of water-resistant dispersant for cement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019940026065A KR960014060A (en) | 1994-10-10 | 1994-10-10 | Manufacturing method of water-resistant dispersant for cement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| KR960014060A true KR960014060A (en) | 1996-05-22 |
Family
ID=66766943
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019940026065A KR960014060A (en) | 1994-10-10 | 1994-10-10 | Manufacturing method of water-resistant dispersant for cement |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR960014060A (en) |
-
1994
- 1994-10-10 KR KR1019940026065A patent/KR960014060A/en not_active Application Discontinuation
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A201 | Request for examination | ||
| E902 | Notification of reason for refusal | ||
| E601 | Decision to refuse application |