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Hydroxypropyl Methyl Cellulose (HPMC) For Gypsum

•substantially reduces the loss of water into absorbing substrates in formulations like cement renders, tile cements, gypsum plasters, etc.

The water retention ability also strongly enhances the adhesion strength of thin•bed mortars. This is because the binders in the mortar such as the cement and gypsum have enough time for hydration and at the same time do not lose water.

•Good adhesion strength and Extended open time

Less skin formation and high water retention through ensure better quality during longer working time on the field. Suitable addition rate of ensure longer open time, higher tensile adhesion strength and better workability.

•Improves the workability

•Significant slip resistance

Slip resistance is crucial in order to improve working efficiency in appliand concentration levels, heavy tiles can be applied to walls without slipping.

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Product Details

Hydroxypropyl methyl cellulose (HPMC) is a non-ionic cellulose ether polymer based on cellulose, a natural polymer derived from refine cotton linter,which are offered as free flowing powder.

According to the degree of substitution and modification of substituent, they have different chemical properties and benefits after alkalization and etherification reactions with Sodium hydroxide,Cholromethane,and propylene epoxide.

Structural formula

Hydroxypropyl Methyl Cellulose (HPMC) For Gypsum

(n～2)/2

OR=-OH、-OCH3、-[OCH2CH(CH3)]nOH or-[OCH2CH(CH3)]OCH3

HEMC Main application

Hydroxyethyl methyl cellulose (HEMC) is a non-ionic cellulose mixed ether made from cotton and wood through alkalization, ethylene oxide and methyl chloride etherification. HEMC is widely used in water-based latex coatings, construction and building materials, printing ink, oil drilling and other fields. Its properties are similar to HPMC, but the presence of hydroxyethyl makes HEMC more soluble in water, the solution is more compatible with salt, and has a higher condensation temperature.

1. in the pharmaceutical field, hydrophilic gel framework materials and pharmaceutical excipients for the preparation of sustained-release preparations are widely used, including oral tablets, suspensions, local preparations, porogens and coating agents.

2. in the field of food processing, it is used for bonding, emulsification, film-forming, thickening, suspension aid, dispersion, water retaining agent, etc.

3. in the field of daily chemical industry, it is used as an additive for toothpaste, cosmetics, detergent, etc.

4. in the field of building materials, it is used as a gelling agent and water retaining agent for cement, gypsum and lime, and is an excellent admixture for powder building materials.

Specification

Type Item	HEMC
Viscosity mPa.s	4000,6000,7000, 8000,10000, 20000, 30000, 40000, 60000, 70000, 100000, 150000, 200000
Gel temperature ℃	70.0-90.0
pH	5.0-9.0
Loss on drying %	≤5.0
Burning residue %	≤5.0
Bulk density g/L	350～420
Methoxy %	19.0～24.0
Hydroxyethoxy %	7.0～10.0