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Guar gum, 2-hydroxypropyl ether
CAS Number: 68442-94-4 / 39421-75-5
EINECS/ELINCS No: 270-497-9 / -
COSING REF No:76868
Chemical Name: Hydroxypropyl guar
MolFormulaC3-H8-O2.x-
Unspecified Mol Weight: 536.4362
NHPID Name:Hydroxypropyl guar
Reference:CHEMID
Proper Name(s):Guar gum, 2-hydroxypropyl ether
Description
Hydroxypropyl Guar Gum is used as an inert ingredient as a thickener in pesticide formulations applied to growing crops.
Guar gum, 2-hydroxypropyl ether is used as an indirect food additive and as a sizing agent in textiles and in papers.
Abstract:
hydroxypropyl guar gum was synthesized by phase transfer catalysis with cetylammonium chloride as catalyst, reaction time and stirring speed, the best synthesis conditions are as follows: guar gum 3g, propylene oxide 1~2g, cetyl ammonium chloride 0.4~0.5g,pH value 10~10.5, the reaction temperature was 45~50 ℃ and the reaction time was 3~4H.
The results showed that the hydroxypropyl guar gum had higher viscosity, dissolution rate, water insoluble content, colloid transparency and stability than guar gum powde
Product description
Esaflor types are quaternized guars and hydroxypropyl guars.
Quaternized guars are recommended for conditioning in shampoos, bath & shower applications.
They also reduce the irritation potential of surfactants and are available in different degrees of substitution.
Hydroxypropyl guars provide thickening and filmforming properties, also suitable for thickening and stabilizing of emulsions.
Synergistic effect with Xanthan Gum and Acrylate Polymers.
Hydroxypropyl guar is a natural thickener, usually appearing as a white powder, derived from guar gum.
Guar (Cyamopsis tetragonoloba) is a domesticated legume crop, with most of of the world's production in India.
Cultivated plants grow to around 1 meter tall, with hairy stems and leaves. The leaves, seed pods and seeds are all known to be edible, and are often cooked in curries.
Harvested seeds or 'guar beans' are dehusked, roasted, hydrated and ground to produce guar gum.
Guar gum is composed of sugars that make it a cold-soluble thickening agent.
Guar gum, 2-hydroxypropyl ether is used to thicken many foods and personal care products, and is a cheaper plant-derived alternative to locust bean gum, which requires greater amounts to achieve the same level of viscosity.
Hydroxypropyl guar is produced by reacting propylene glycol with guar gum, which improves its solubility and stability.
What is Hydroxypropyl guar?
Hydroxypropyl guar is a non-ionic polymer.
As the name suggests, it is obtained from naturally occurring guar beans.
Guar gum, 2-hydroxypropyl ether comes as fine yellow powder.
The process of isolating hydroxypropyl guar includes first galactomannan, polysaccharide of guar beans seeds is isolated with some heat and mechanical method, then it is reacted with propylene in presence of NaOH, as a catalyst.
Uses:
Guar gum, 2-hydroxypropyl ether is just like a parent plant helps increase viscosity of a product.
Guar gum, 2-hydroxypropyl ether works over a wide pH range. It can be used in sprayable products as well to increase viscosity.
The film-forming capability of this molecule helps dry hair and skin recover faster.
Moisture gets locked within the skin because of this film, as a result skin becomes smoother and well lubricated.
Guar gum, 2-hydroxypropyl ether can help stabilize emulsions. Especially when there are varieties of ingredients in any products used, the stability of the product due to unrequired interactions becomes an issue.
In that case the hydroxypropyl guar remains stable over wide pH range, presence of salt and alcohol.
Guar gum, 2-hydroxypropyl ether is used to form skin creams, lotions, hair care products, gels, and make-up.
Functions:
Antistatic: Reduces static electricity by neutralizing electrical charge on a surface
Fixing agent: Allows the cohesion of different cosmetic ingredients
Emulsion stabilizer: Promotes the emulsification process and improves the stability and shelf life of the emulsion
Film forming agent: Produces a continuous film on skin, hair or nails
Surfactant: Reduces the surface tension of cosmetics and contributes to the uniform distribution of the product during its use
Viscosity control agent: Increase or decrease the viscosity of cosmetics
CosIng functions
Antistatic
Binding
Emulsion Stabilising Agent
Film Forming
Surfactant
Viscosity Controlling Agent
Applications:
Dry cement based wall putty: HPG is widely preferred for use in dry cement based wall putty as it has good compatibility with different ingredients.
Guar gum, 2-hydroxypropyl ether does not form any lumps and offers excellent water retention.
The final mixture after the addition of modified guar gum powder shows good adhesion and smooth finishing.
Gypsum based plaster: On addition of HPG in the gypsum based plaster, it improves the setting time & open time of the mixture that ensures good workability.
With the help of a hand plaster, smoother finishes are obtained.
Tile adhesives: The addition of HPG improves the adhesive strength, open time, and adjustable time of the final mixture.
The workability is enhanced as well and it also makes sure that the mixture is easily applied.
Waterborne paints: The fact that HPG is a rheological modifier makes it an important additive for paint.
Guar gum, 2-hydroxypropyl ether provides adequate viscosity and prevents spattering when the paint is applied with a roller.
Advantages of Hydroxypropyl Guar Gum:
Guar gum, 2-hydroxypropyl ether offers high and easier solubility in water as compared to cellulose.
Workability is significantly improved when HPG is mixed in a gypsum-based mortar.
Hydroxypropyl Guar Gum has the ability to replace cellulose ether when used in cement-based mortar.
Guar gum, 2-hydroxypropyl ether imparts improved anti-sagging and thixotropy.
HPG can act as a substitute for cellulose ether for low viscosity applications since it has similar water retention ability.
HPG offers a cost-effective alternative as it is quite cheaply available.
Hydroxypropyl Guar
Chemical Function: Polymer, Thickener, Viscosity Builder / Stabilizer
Product Applications: Bath & Shower, Cream Rinse, Hair Care, Hair Cleansing, Hair Conditioning, Hand Cleansing, Skin Care, Skin Cleansing
Green Criteria: From renewable resources
Green Certifications: Ecocert , Whole Foods
Description
Guar gum, 2-hydroxypropyl ether is ideal for thickening solutions containing high alcohol or glycol content.
Guar gum, 2-hydroxypropyl ether provides an emollient effect to the skin and can be used as a general-purpose viscosifier for hydroalcoholic solutions, oil-in-water emulsion stabilization, and foam stabilization.
Guar gum, 2-hydroxypropyl ether is stable over a wide pH range and is compatible with electrolytes, polar solvents, glycols, and alcohols.
Best suited for use with solvents, even 100% ethanol based formulations. This solution is a natural thickener and film former for hand sanitizers.
Features & Benefits
A thickener with optimum/full compatibility with polar solvents and ethanol
Stable over a wide pH range. pH stable 4 – 10
Film former in hand sanitizers for soft skin feel
Strong synergy with Xanthan Gum
Hair Care
Increased deposition and substantivity to hair
Controlled delivery of water-insoluble substances
Exceptional conditioning properties at lower usage levels
Excellent wet/dry hair combing and detangling
Body Care
Reduced skin stiffening caused by surfactants
Restored skin’s pH buffering effects are 5 times faster
Increased deposition and substantivity to skin
Enhancement of foam sensorial attributes
Applications
Hair Care
Shampoo, conditioner, mask, treatments, hair styling, hair colorants
Body Cleansing
Shower products, hand sanitizer, facial cleansers, feminine hygiene
Skin Care
Face and neck care, body care, eye care, sun care, hand/nail/foot care, color cosmetics
Health & Hygiene
Shaving, depilatories, deodorants, oral care, toothpaste, personal lubricant, topical products, air freshener
Description
Guar gum, 2-hydroxypropyl ether is ideal for thickening solutions containing high alcohol or glycol content.
Guar gum, 2-hydroxypropyl ether provides an emollient effect to the skin and can be used as a general-purpose viscosifier for hydroalcoholic solutions, oil-in-water emulsion stabilization, and foam stabilization.
Guar gum, 2-hydroxypropyl ether COS is stable over a wide pH range and is compatible with electrolytes, polar solvents, glycols, and alcohols.
Best suited for use with solvents, even 100% ethanol based formulations.
This solution is a natural thickener and film former for hand sanitizers.
Features & Benefits
A thickener with optimum/full compatibility with polar solvents and ethanol
Stable over a wide pH range. pH stable 4 – 10
Film former in hand sanitizers for soft skin feel
Strong synergy with Xanthan Gum
Hair Care
Increased deposition and substantivity to hair
Controlled delivery of water-insoluble substances
Exceptional conditioning properties at lower usage levels
Excellent wet/dry hair combing and detangling
Hydroxypropyl-Guar (HP-Guar, Inactive Ingredient)
Guar gum is a high molecular weight, natural polysaccharide derived from the guar bean
Guar gum, 2-hydroxypropyl ether's ability to form a viscous solution at low concentration makes it an attractive option as a thickening and viscosity agent in a wide range of industrial products.
For ophthalmic use, HPguar is used in a rigid gas permeable contact lens solution and in SYSTANE® artificial tears.
Chemistry and Properties
Like guar gum, HP-guar is a polysaccharide composing of a linear backbone of mannose units and side chains consisting of galactose units, with a 2:1 ratio of mannose:galactose.
However, HP-guar is a chemically-modified guar designed to improve heat stability of guar, with minimal effect on the crosslinking potential with metal ions, including tetra-hydroxyborate .
A borate anion condenses onto one galactose unit, converting nonionic HP-guar into an anionic HP-guar.
Through this mechanism, the borate can crosslink two separate HP-guar segments and increases solution viscosity, giving rise to gels.
This HP-guar/borate interaction transforms a lowviscosity liquid to a shear-thinning gel, and occurs between pH 7 and 8.5 Functionally, HP-guar acts as a gelling agent and mimics the mucin layer of the tear film.
Guar gum, 2-hydroxypropyl ether has been shown to have good lubricity by demonstrating excellent drag reduction.
TYPICAL PRODUCT SPECIFICATIONS
NOTES
Hydroxypropyl guar is a Propylene glycol ether of guar gum Hydroxypropyl guar uses and applications include:
Antistat, binder, emulsion stabilizer, film-former, viscous control agent, thickener, suspending agent, stabilizer, slip agent, flocculant in cosmetics; mineral flotation depressant; textile auxiliaries; viscous builder for oil-well workovercompletion fluids; binder, surfactant, lubricant, plasticizer in ceramics; dry str.
And formation aid in manufacturing of paperpaperboard in contact with aqueousfatty foods
CLASS
Specialty Chemicals
FUNCTIONS
Surfactant, Stabilizer, Flocculant, Lubricant
INDUSTRY
Cosmetic
Application of Hydroxypropyl Guar Gum (HPG)
Guar gum, 2-hydroxypropyl ether is a galactomannan polysaccharide that is extracted from guar beans.
Guar gum, 2-hydroxypropyl ether has thickening & stabilizing properties and hence finds numerous application in the food, feed, and industries.
Hydroxypropyl Guar Gum, also known as HPG, is formed by the etherification reaction with non-ionic propylene oxide reagent with guar gum.
This modification of guar gum severely improves its properties, like- alkaline stability, hydrophobicity, solubility, biostability, etc.
Guar gum, 2-hydroxypropyl ether is thus deemed suitable for construction applications.
BACKGROUND
Hydroxypropyl guar (HPG) is commonly used as a thickener of hydraulic fracturing fluid.
Guar gum, 2-hydroxypropyl ether is also used as an inert ingredient as a thickener in pesticide formulations applied to growing crops only; as an indirect food additive; and, as a sizing agent in textiles/papers.
The substance is a propylene glycol ether derivative of guar gum.
Guar gum is a resinous material derived from milled endosperm from guar beans of the legume Cyamopsis tetragonolobus.
Structurally, Guar gum, 2-hydroxypropyl ether is a galactomannan (high molecular weight carbohydrate polymer) consisting of a main chain of D-mannose with a side chain of D-galactose at approximately every second mannose unit.
The mannose units are β-(l-4) linked, and the single D-galactose units are joined to the main chain by α-(1-6) linkages.
Hydroxypropyl guar is readily biodegradable and is not expected to bioaccumulate.
Based on Guar gum, 2-hydroxypropyl ether's high molecular weight and polysaccharide structure, the substance would be expected to be of low acute and chronic toxicity to aquatic organisms.
CHEMICAL NAME AND IDENTIFICATION
Chemical Name (IUPAC): Guar gum, 2-hydroxypropyl ether
CAS RN: 39421-75-5
Molecular formula: (C3H8O2)x (UVCB substance)
Molecular weight: 536.4362 g/mol; 200,000 to 300,000 daltons
Synonyms: Hydroxypropyl guar; hydroxypropyl guar gum; guar gum, 2-hydroxypropyl ether
PHYSIO-CHEMICAL PROPERTIES
Hydroxypropyl guar is a white to yellow fine powder that is very slightly soluble in water.
Guar gum, 2-hydroxypropyl ether is a polysaccharide comprised of a polymannose backbone with mono-galactose pendent groups (whereby the mannose:galactose ratio is 2:1), derivatized via ether linkages with propylene glycol, at some of the free hydroxyl groups of the polysaccharide backbone
Hydroxypropyl guar is a slightly modified form of guar gum.
Guar gum's polymeric structure contains numerous hydroxyl groups, which can be treated to form propylene glycol ethers, resulting in hydroxypropyl guar gum.
As is the case with the hydroxypropyl derivatives of cellulose and methylcellulose, this modification has an impact upon the viscosifying properties of the polymer (which makes it more desirable for certain commercial applications) but does not increase toxicological concerns
Cas no. 39421-75-5
Purity 99.9%
Appearance Powder
Grade Industrial Grade
Synonyms: guar gum 2-hydroxypropyl ether
HYDROXYPROPYL GUAR
HYDROXYPROPYL GUAR is classified as :
Antistatic
Binding
Emulsion stabilising
Film forming
Surfactant
Viscosity controlling
Chem/IUPAC Name:Guar gum, 2-hydroxypropyl ether, depolymd
Category
Polymer Surfactant
Chemical Numbering System
CASRN: 39421-75-5
EINECS: N/A
Molecular Formula & Molecular Weight
Molecular Formula: N/A
Molecular Weight: N/A
Structure
Properties
Appearance (1), powder.
Solubility soluble in water.
Stability stable.
As a nonionic hydroxypropyl guar polymeric viscosifier derived from natural Guar Gums, our product is of suitable substitution level, good aqua dissolvability / dispersibility, and high compatibility with anionic, cationic and nonionic surface-active agents.
With its excellent electrolyte resistance, viscosity stability and good shear dilutability, our product can be used in fracture fluids and drilling mud in oil field.
Usage:
By mixing HPG with water, cross-linking agent, polymerizing agent, and proppant to improve drill productivity. The normal level of use in fracture fluids is 0.3-0.5% by weight.
Adding certain amount of HPG into drilling mud, it can give the mud features like moisture-keeping, lubricating, and can significantly reduce water loss and damage to stratum.
Dissolving Method:
Add the product into deionised water, blend to make it dissolve, then add citric acid and adjust PH to around 6.
Viscosity is quickly released and the solution becomes viscous
Specifications
1.Hydroxypropyl Guar Gum for oilfield
2.CAS:39421-75-5
3. light yellow powder
Application
Low-damage fracturing fluid thickener
Applied in oilfield fracturing / sand control / water control operations.
Hydroxypropyl guar gum powder fracturiing fluid is a low damage fracturing fluid, suitable for fracturing of low permeability reservoir at 30°C-150°C .
Packing: Packed in multiwall paper sack of 25Kgs/ 50Lbs, other packagings are available as per requirements.
Properties
Appearance: pale yellow powder; or off-white powder.
Solubility: soluble in water.
Stability: stable.
Solid form: flammable material; irritation, irritation to skin, eye, respiratory system.
Harmful products of combustion are CO, CO2 and so on. Contact with strong oxidants, can cause to burn.
Alternative Names
3A1I7376TC
1530WMS90S
39421-75-5
Guaraprolose
Guaraprolose [INN]
UNII-1530WMS90S
UNII-3A1I7376TC
Guar gum, 2-hydroxypropyl ether
Hydroxypropyl guar
Hydroxypropyl guar gum
