Sodium Naphthalene Sulfonate Formaldehyde

Sodium naphthalene sulfonate formaldehyde (SNF), also known as SNF superplasticizer, naphthalene based superplasticizer, sodium naphthalene, naphthalene sulfonate, poly naphthalene sulfonate (PNS), sodium naphthalene formaldehyde, sulphonated naphthalene formaldehyde (SNF), naphthalene sulfonate formaldehyde (NSF),etc. The sodium naphthalene sulfonate is a derivative of sulfonic acid containing naphthalene functional group, which belongs to the naphthalene series superplasticizer,It not only has a strong dispersing effect on cement particles, but also has a high water reduction rate for concrete.Therefore, it is widely used in the construction industry. Besides, it is also highly utilized in various industries such as agriculture, plastics and rubber, papermaking, textiles etc.

As concrete admixtures it usually reduce the required water content for a concrete mixture by about 5 to 10 percent. Consequently, concrete containing a water-reducing admixture needs less water to reach a required slump than untreated concrete. The treated concrete can have a lower water-cement ratio. This usually indicates that a higher strength concrete can be produced without increasing the amount of cement. Recent advancements in admixture technology have led to the development of mid-range water reducers. These admixtures reduce water content by at least 8 percent and tend to be more stable over a wider range of temperatures. Mid-range water reducers provide more consistent setting times than standard water reducers.High-range water reducers (HRWR) can be added to concrete with a low-to-normal slump and water-cement ratio to make high-slump flowing concrete. Flowing concrete is a highly fluid but workable concrete that can be placed with little or no vibration or compaction. The effect of superplasticizers lasts only 30 to 60 minutes, depending on the brand and dosage rate, and is followed by a rapid loss in workability. As a result of the slump loss, superplasticizers are usually added to co