Cellulose ether HPMC
） Shan State Hydroxypropyl Methyl Cellulose ( HPMC )
I. Technical requirements:
、质量标准： Q/SHD004-2007 1. Quality standard: Q / SHD004-2007
(WT%) Methoxy content (WT%)
(WT%) Hydroxypropoxy content (WT%)
Gel temperature (℃)
WT% ） Loss on drying ( WT% )
WT% ） Ignition residue ( WT% )
值（ 1% 溶解， pH ( 1% dissolved,
HPMC 理化性质： 1. Physical and chemical properties of HPMC :
、外观：白色或类白色粉末。 1. Appearance: white or almost white powder.
、颗粒度； 100 目通过率大于 98.5% ； 80 目通过率大于 100% 。 2. Granularity; 100 mesh pass rate is greater than 98.5% ; 80 mesh pass rate is greater than 100% .
、炭化温度： 280-300 ℃ 3 , carbonization temperature: 280-300 ℃
、视密度： 0.25-0.70/cm3( 通常在 0.5g/cm3 左右 ) ， 4. Apparent density: 0.25-0.70 / cm3 ( usually around 0.5g / cm3 ) ,
、比重 1.26-1.31 。 5. Specific gravity 1.26-1.31 .
、变色温度： 190-200 ℃ 6. Discoloration temperature: 190-200 ℃
、表面张力： 2% 水溶液为 42-56dyn/cm. 7 , surface tension: 2% aqueous solution is 42-56dyn / cm.
、溶于水及部分溶剂 。 8 , soluble in water and some solvents . The aqueous solution is surface active. PH 值影响。 High transparency, stable performance, different specifications of products with different gel temperatures, solubility changes with viscosity, the lower the temperature, the greater the solubility, the performance of different specifications of hydroxypropyl methyl cellulose is different, hydroxypropyl methyl fiber The solubility of the element in water is not affected by pH . With the decrease of methoxyl content, the hydroxypropyl methylcellulose increases the gel point, the water solubility decreases, and the surface activity also decreases.
、羟丙基甲基纤维素还具有增稠能力，耐盐性低灰粉、 PH 稳定性、保水性、尺寸稳定性、优良的成膜性、以及广泛的耐酶性、分散性和粘结性等特点。 9.Hydroxypropyl methylcellulose also has thickening ability, low salt resistance, low ash powder, PH stability, water retention, dimensional stability, excellent film formation, and extensive enzyme resistance, dispersibility and viscosity Results and other characteristics.
2. Application fields of hydroxypropyl methyl cellulose (construction industry):
、水泥砂浆：提高水泥－砂的分散性，大幅度改善砂浆的可塑性和保水性，对防止裂纹有效果，可增强水泥强度。 1. Cement mortar: improve the dispersibility of cement-sand, greatly improve the plasticity and water retention of the mortar, have an effect on preventing cracks, and enhance the strength of cement.
、瓷砖水泥：提高压制瓷砖砂浆的可塑性、保水性、提高瓷砖的胶接力，防止粉化。 2. Tile cement: improve the plasticity and water retention of the pressed tile mortar, improve the adhesive strength of the tile, and prevent chalking.
、石棉等耐火材料的涂复：作为悬浮安剂，流动性改善剂，还提高对基底的胶接力。 3 , coating of asbestos and other refractory materials: as a suspension agent, fluidity improver, and also improve the adhesive strength to the substrate.
、石膏混凝浆料：改善保水性和加工性，提高对基底的胶粘力。 4 , gypsum coagulation slurry: improve water retention and processability, improve the adhesion to the substrate.
、接缝水泥：添加于石膏板用的接缝水泥中，改善流动性和保水性。 5. Joint cement: added to joint cement for gypsum board to improve fluidity and water retention.
、乳胶油灰：改善以树脂乳胶为基础油灰的流动性和保水性。 6 , latex putty: improve the fluidity and water retention of resin latex-based putty.
、灰泥：作为代替天然物的浆糊，能改善保水性，提高同基底的胶接力。 7. Stucco: As a paste in place of natural materials, it can improve water retention and increase adhesive strength with the substrate.
、涂料：作为乳胶涂料的增塑剂，对改善涂料的操作性能和流动性的改善有作用。 8. Coatings: As a plasticizer for latex coatings, it has an effect on improving the operating performance and fluidity of coatings.
、喷涂涂料：对防止水泥系或乳胶系喷涂只得料填料下沉和改善流动性及喷束图形有良好效果。 9. Spray coating: It has a good effect on preventing the sinking of fillers and improving the fluidity and spray pattern of cement-based or latex-based spraying.
、水泥、石膏二次制品：作为水泥－石棉系等水硬性物质的压出成型粘结剂使用，提高流动性，能得到均匀的成型品。 10. Cement and gypsum secondary products: Used as a binder for extrusion of hydraulic materials such as cement-asbestos, which improves fluidity and can obtain uniform molded products.
、纤维壁：由于抗酶抗细菌作用，作为砂壁的粘合剂是有效的。 11 , fiber wall: due to anti-enzyme and anti-bacterial effect, as a sand wall adhesive is effective.
、其它：可以利用作稀薄胶泥砂灰浆和泥水工操作人作用的（ PC 版）的气泡保持剂。 12. Others: It can be used as a bubble retention agent ( PC version) for thin cement mortar and mortar operator ( PC version).
3. Dissolution method of hydroxypropyl methyl cellulose:
所有型号均可以采用干混法加入到物料中； 1. All models can be added to the material by dry blending;
需要直接要加入到常温水溶液中时，最好采用冷水分散型 , 加入后 粘度慢慢增加， 在2 -30 分钟增稠； 2. When it needs to be directly added to the normal temperature aqueous solution, it is best to use a cold water dispersion type . After adding, the viscosity slowly increases and thickens in 2-30 minutes;
普通型号先用热水搅拌分散后，加入冷水搅拌冷却后即可溶解； 3. For ordinary models, stir and disperse with hot water first, and then dissolve after adding cold water, stirring and cooling;
溶解时如发生结块包裹现象，是因为搅拌不充分或普通型号直接加入到冷水中的原因，此时应快速搅拌。 4. If the phenomenon of clumping and wrapping occurs during dissolution, it is because of insufficient stirring or the ordinary model is directly added to cold water. At this time, it should be stirred quickly.
溶解时如果产生气泡，可以静置 2-12 小时（具体时间由溶液稠度决定）或抽真空、加压等方法去除，也可以加入适量的消泡剂。 5. If bubbles are generated during dissolution, they can be left to stand for 2-12 hours (the specific time is determined by the consistency of the solution) or removed by vacuuming, pressing, etc., or an appropriate amount of defoaming agent can be added.
Fourth, hydroxypropyl methyl cellulose packaging, storage and transportation precautions:
。 The product is packaged in a plastic-coated polypropylene woven bag lined with a polyethylene inner bag. The net weight of each bag is 25kg . Store in a ventilated and dry place during storage, avoiding moisture. Pay attention to rain and sun protection during transportation.