Sodium Carboxymethyl cellulose and hydroxypropyl methyl cellulose have essential differences in sub-formula, raw materials, and production processes.
In terms of application, architectural coatings and putty powder, sodium carboxymethyl cellulose is generally used for ordinary interior wall putty, and hydroxypropyl methylcellulose is used for exterior wall waterproof putty. The fundamental difference in the application of putty powder is Sodium carboxymethyl cellulose reacts with gray calcium and white cement to form flocculent precipitates, but hydroxypropyl methyl cellulose does not.
Sodium carboxymethyl cellulose is soluble in cold water, while hydroxypropyl methyl cellulose It is divided into hot-melt type (that is, heating and dissolving) and instant type. The instant type can be dissolved in cold water, but in routine use, most users still prefer the hot-melt type, which is inseparable from the usage habits, so There are so many manufacturers that only produce hot-melt type, which is the reason.
