Effect and application of hydroxypropyl cellulose ether in building materials

       The effect and application of hydroxypropyl cellulose ether in building materials, environmentally friendly putty that is water-resistant and wipe-resistant in most cities in China has been paid attention to by everyone. In the past few years, because the putty made of construction glue emits formaldehyde gas hazards Everyone is healthy, the building glue is made by acetal reaction of polyvinyl alcohol and formaldehyde. Therefore, this kind of material is gradually being screened by everyone, and the cellulose ether series products are replaced by this material, that is to say, the development of environmentally friendly building materials, cellulose is the only kind of material at present.

       In the water-resistant putty, it is divided into dry powder putty and putty paste. Among these two kinds of putty, modified methyl cellulose and hydroxypropyl methyl are usually selected. The viscosity standard is usually between 30000-60000cps. The primary effect of cellulose in putty is water retention, adhesion, and smoothness. Because the putty formulas of various manufacturers are different, some are ash calcium, light calcium, white cement, etc., and some are gypsum powder, ash calcium, light calcium, etc., so the standard viscosity and penetration amount of cellulose selected for the two formulas are also different. Usually, The participation amount is about 2‰-3‰.

       In the construction of scraping wall putty, because the base surface of the wall has a certain amount of water absorption (the water absorption rate of the brick wall is 13%), the concrete is 3% to 5%), and the external Transpiration, so if the putty loses water too fast, it will cause cracks or powder removal, and then weaken the strength of the putty. For this reason, this problem will be solved after adding cellulose ether. However, the quality of the filler, especially the quality of the ash calcium, is also important.

       Because cellulose has a high viscosity, it also enhances the buoyancy of the putty, avoids sagging during construction, and is smooth and labor-saving after scraping. It is necessary to add more factories to the cellulose ether in the powder putty. Its production and application are relatively convenient. The filler and the auxiliary agent can be mixed with dry powder evenly. The construction is also relatively fast.