Melamine formaldehyde sulfonate

The effect of the interaction between two types of SPs (naphthalene formaldehyde sulfonates-NFS and melamine formaldehyde sulfonate-MFS) and the VEA on the fluidity of mortar is seen in Fig. 7.46. In the case of NFS, the mortar flow decreases with increasing addition of the VEA. This result indicates an appreciable interaction between NFS and the VEA. On the other hand, the fluidity of the mortar containing the MFS does not change. Measured amounts of the SPs showed that there was good correlation between the amount of SP adsorbed and observed fluidity. [Pg.533]

Melamine formaldehyde sulfonate and naphthalene sulfonates are added to concrete to plasticize the mix. A plasticizer in concrete technology is a cement-dispersing agent. Other polymers can be added to cement mortars/concretes to improve flexibility and reduce permeability to water, e.g., styrene butadiene rubber (SBR) emulsions to give air entrainment for freeze-thaw resistance, e.g., alkyl sulfonates or to thixotropize a mix, e.g., polyacrylamide. [Pg.315]

Chemical admixtures They are generally water-soluble, added mainly to control setting and early hardening of fiesh concrete, and to reduce water requirements. Chemical admixtures include accelerators, normal water reducers, superplasticizers, and retarders. The accelerators may contain calcium chloride, alkali hydroxide, calcium formate, calcium nitrate, etc. Examples of retarders are Na, Ca, or NH4 salts of lignosulfonic acids, hydroxy carboxylicacids,orderivativesofcarbohydrates.Normal water reducers may contain salts of refined lignosulfonic acids, hydroxycarboxylic acids, hydroxylated polymers, etc. Superplasticizers may contain sulfonated melamine formaldehyde, sulfonated naphthalene formaldehyde, car-boxylated synthetic polymers, etc. [Pg.144]

In addition to the two basic groups of antifreeze admixtures, others containing superplastizisers such as sulfonated naphthalene formaldehyde (SNF) and sulfonated melamine formaldehyde (SMF) have been developed. The main advantage afforded by such admixtures is that they produce significant water-reduction. [Pg.317]

MC MDI MEKP MF MMA MPEG MPF NBR NDI NR OPET OPP OSA PA PAEK PAI PAN PB PBAN PBI PBN PBS PBT PC PCD PCT PCTFE PE PEC PEG PEI PEK PEN PES PET PF PFA PI PIBI PMDI PMMA PMP PO PP PPA PPC PPO PPS PPSU Methyl cellulose Methylene diphenylene diisocyanate Methyl ethyl ketone peroxide Melamine formaldehyde Methyl methacrylate Polyethylene glycol monomethyl ether Melamine-phenol-formaldehyde Nitrile butyl rubber Naphthalene diisocyanate Natural rubber Oriented polyethylene terephthalate Oriented polypropylene Olefin-modified styrene-acrylonitrile Polyamide Poly(aryl ether-ketone) Poly(amide-imide) Polyacrylonitrile Polybutylene Poly(butadiene-acrylonitrile) Polybenzimidazole Polybutylene naphthalate Poly(butadiene-styrene) Poly(butylene terephthalate) Polycarbonate Polycarbodiimide Poly(cyclohexylene-dimethylene terephthalate) Polychlorotrifluoroethylene Polyethylene Chlorinated polyethylene Poly(ethylene glycol) Poly(ether-imide) Poly(ether-ketone) Polyethylene naphthalate Polyether sulfone Polyethylene terephthalate Phenol-formaldehyde copolymer Perfluoroalkoxy resin Polyimide Poly(isobutylene), Butyl rubber Polymeric methylene diphenylene diisocyanate Poly(methyl methacrylate) Poly(methylpentene) Polyolefins Polypropylene Polyphthalamide Chlorinated polypropylene Poly(phenylene oxide) Poly(phenylene sulfide) Poly(phenylene sulfone)... [Pg.959]

Determination of MCT. The coating systan used consists of a thermosetting acrylic latex, Hycar 2600X256 (EFGoodrich Chenical Division) containing 15 wt.% of a partially methylated melamine formaldehyde, Cymel 373 (American Cyanamid Corporation). Adjustment of the pH level of the coating was achieved by the addition of p—toluene sulfonic acid. [Pg.87]

Aerosol OS Liq. Aerosol OS. See Sodium diisopropyl naphthalene sulfonate Aerosol OT-85 AE Aerosol OT-100%. See Dioctyl sodium sulfosuccinate Aerosol Propellant BPAP I32 Aerosol Propellant BPAP 146. See Isobutane Aerotex M-3. See Melamine-formaldehyde resin... [Pg.125]

Poly (melamine-co-formaldehyde), methylated. See Melamine-formaldehyde resin, methylated Poly (melamine-co-formaldehyde), methylated/butylated. See Melamine-formaldehyde resin, methylated-butylated Polymene AZ. See PEG castor oil Polymer C . See Polypropylene Polymer SBOCP. See Cocamidopropyl dimethylammonium C8-16 isoalkylsuccinyl lactoglobulin sulfonate Polymer Additive GH. See Polyoxyisobutylene/methylene urea copolymer Polymeric biuret of HDI Polymeric HDI Polymeric HMDI. See Hexamethylene diisocyanate biuret Polymeric MDI... [Pg.3529]

Triallylcyanurate comonomer, high temp, plastics Hydroxyethyl-s-triazine comonomer, high-performance resin m-Phenylenedimaleimide comonomer, hydrophobic acrylics N-t-Octylacrylamide comonomer, ionomeric polymers Sodium vinyl sulfonate comonomer, melamine-formaldehyde resins Guanidine carbonate comonomer, monomer polymerization 4-Vinylcyclohexene comonomer, nitrile rubber m-Divinylbenzene Vinylidene chloride monomer... [Pg.4992]

Melamine-formaldehyde resin, etherified acrylated Sucrose benzoate Vinyltriethoxysilane Vinyltrimethoxysilane Vinyltris (2-methoxyethoxy) silane hardener, composites 4,4 -Diaminodiphenyl sulfone hardener, concrete surface Zinc hexafluorosilicate hardener, cosmetics Alkenyl succinic anhydride hardener, decorative coatings o-Tolyl biguanide hardener, elastomers m-Divinylbenzene hardener, emulsions Chromium acetate (ic) hardener, epoxies... [Pg.5359]

The flow properties of the slurry may be improved by adding suitable dispersing agents, such as sulforrated rraphthalene formaldehyde condensate (SNFC), sulfonated melamine formaldehyde condensate (SMFC), or lignin-based dispersants. [Pg.348]

Water reduction Salts of sulfonated naphthalene and melamine formaldehyde condensates, lignosulfonates... [Pg.319]

Sulfonated naphthalene formaldehyde Sulfonated melamine formaldehyde Poly(vinylphosphoric acid) Poly(styrenephosphoric acid)... [Pg.276]

Precipitated silicas differ from pyrogenic silicas, which are also referred to as aerosils. The most preferred suitable plasticizers are Ugnosulfonate, sulfonated naphthalene-formaldehyde polycondensates, sulfonated melamine-formaldehyde polycondensates, and poly(carboxylate ether)s (16). [Pg.195]

Chemical admixtures in small amounts are added to concrete to enhance the physical, mechanical, chemical, and durability characteristics of concrete. Superplasticizers are admixtures that have the ability to increase the workability of concrete (for easy placement), but also produce high strength concretes. The relative rates of hydration of cement containing superplasticizers at different temperatures are conveniently followed by conduction calorimetry. In Fig. 11 both the rates of hydration and the cumulative amounts of heat developed in cement pastes hydrated at temperatures of20,40, and 55" C are plotted as a function of time. In the figure, SMF refers to the superplasticizer based on sulfonated melamine formaldehyde. The addition of the superplasticizer retards the hydration of cement. The retardation increases with the dosage of the superplasticizer. Also, the retardation effect becomes less significant as the temperature of hydration is increased. [Pg.29]

Figure 20. Conduction calorimetric curves of cement mortars containing Na gluconate and sulfonated melamine formaldehyde (SMF).

Ramachandran, V. S., Lowery, M. S., and Malhotra, V. M., Behavior of ASTM Type V Cement Hydrated in the Presence of Sulfonated Melamine Formaldehyde, Mater. Const., 28 133-138 (1995)... [Pg.291]

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