MHK277 - Hydroxy Propyl Methyl Cellulose Special For Polypropylene Rubber Powder

Hypromellose (INN), short for hydroxypropyl methylcellulose (HPMC), is a semisynthetic, inert, viscoelastic polymer used as eye drops, as well as an excipient and controlled-delivery component in oral medicaments, found in a variety of commercial products
As a food additive, hypromellose is an emulsifier, thickening and suspending agent, and an alternative to animal gelatin. It's Codex Alimentarius code (E number) is E464.

Chemistry

Hypromellose is solid, and is a slightly off-white to beige powder in appearance and may be formed into granules. The compound forms colloids when dissolved in water. This non-toxic ingredient is combustible and can react vigorously with oxidizing agents.
Hypromellose in an aqueous solution, unlike methylcellulose, exhibits a thermal gelation property. That is, when the solution heats up to a critical temperature, the solution congeals into a non-flowable but semi-flexible mass. Typically, this critical (congealing) temperature is inversely related to both the solution concentration of HPMC and the concentration of the methoxy group within the HPMC molecule (which in turn depends on both the degree of substitution of the methoxy group and the molar substitution. That is, the higher the concentration of the methoxy group, the lower the critical temperature. The inflexibility/viscosity of the resulting mass, however, is directly related to the concentration of the methoxy group (the higher the concentration, the more viscous or less flexible the resulting mass is).

Physico-chemical properties

Typical viscosity range of HUAMAO® HPMC products with NDJ-1 rotary viscometer at 20℃ with 2% solution.

Type	Typical viscosity
040	3-9
067	10-20
079	20-30
096	40-60
114	80-120
148	300-800
153	400-600
165	700-900
180	1200-2000
205	3500-5500
222	7000-9000
227	9000-11000
237	13000-17000
244	18000-22000
261	35000-45000
271	55000-65000
277	65000-85000
284	85000-130000
294	130000-180000
301	180000-230000
307	＞230000

*The above specifications have grade that disperses in cold water, such as MHE 227S, ”S” stands for dispersing in cold water

Physico-chemical properties of MHK277

Item	Required Specifications	Test Result
Appearance	White free flowing power	White free flowing power
Hydroxypropoxy(WT%)	4.0-12	8.30
Methoxy(WT%)	19-24	21.88
Gel Temperature (℃)	70-90	73.0-74.5
Ash Content (%)	≤5	4.35
Moisture Content (%)	≤5	2.51
pH	5.0-8.0	7.47
Partical Size	Mesh 80	100% through
Viscosity (NDJ-1)	70000-80000	80000
Viscosity (Brookfield)	35000

2 % solution; on dry basis,20℃

Used in: confecting glue powder
1. Excellent dispersion of water, when the preparation of the regiment.
2. Super thickening, moisturizing, can save 10% of cellulose dosage, in order to save costs.
3. Unparalleled construction lubrication, single stir heavy calcium paste into standing shape, delicate and bright.
4. Make the glue that is prepared is 30% higher than the traditional cellulose