| HS Code | 408060 |
| Product Name | Self-emulsified Block Silicone Oil RH-NB-9907 |
| Model | RH-NB-9907 |
| Product Type | Self-emulsified block silicone oil |
| Chemical Composition | Block polysiloxane containing self-emulsifying groups |
| Appearance | Colorless to light yellow transparent liquid |
| Ionicity | Weak cationic |
| Ph Value | 5.0-7.0 (1% aqueous solution) |
| Solid Content | 30% ± 1% |
| Viscosity | 1000-5000 mPa·s (25°C) |
| Water Solubility | Soluble in water |
| Emulsifying Property | Self-emulsifying |
| Dilution | Can be diluted with water |
| Shelf Life | 6 months (unopened) |
| Storage Conditions | Store in a cool, dry, ventilated place; avoid freezing and direct sunlight |
| Packaging | 120 kg plastic drum |
As an accredited Self-emulsified Block Silicone Oil RH-NB-9907 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Self-emulsified Block Silicone Oil RH-NB-9907 is packed in 200 kg plastic drums, with each drum securely sealed and clearly labeled. |
| Container Loading (20′ FCL) | 20′ FCL loading: Self-emulsified Block Silicone Oil RH-NB-9907 in labeled, sealed drums/pails, palletized and secured for ocean shipment. |
| Shipping | RH-NB-9907 is supplied in sealed, labeled drums or IBCs and shipped by standard freight. Keep containers closed, upright, and protected from freezing, heat, and contamination. Transport and store according to the SDS; classify as dangerous goods only if the SDS indicates. |
| Storage | Store in a cool, dry, well-ventilated area away from direct sunlight, heat, sparks, and strong oxidizers. Keep containers tightly closed, properly labeled, and in original packaging. Protect from freezing and extreme temperatures. Inspect regularly for leaks, and consult the SDS for specific temperature limits and shelf life. |
| Shelf Life | Recommended shelf life is 12 months when stored in the original sealed container in a cool, dry place, away from direct sunlight. |
In continuous cotton interlock finishing, the self-emulsified block silicone oil RH-NB-9907 is introduced into a pad bath that often contains a cationic dye-fixing agent, a polyethylene wax dispersion, and a low-formaldehyde resin. The principal processing conflict is not the silicone’s shear response but the colloidal interaction between the nonionic silicone polyether phase and cationic fixer residues; when the fixer is dosed before the silicone at bath temperatures above 45°C, localized agglomeration produces visible oily specking on fabric after stenter drying. Production-scale trials on a two-roller horizontal padder with 70-80% liquor pickup and 0.2-0.4 MPa nip pressure show acceptable bath stability when the addition sequence is water at 25-35°C, acetic acid/sodium acetate buffer to pH 5.5-6.0, RH-NB-9907 at 10-30 g/L for 100% cotton interlock or 5-15 g/L for polyester-cotton sheeting, then the cationic fixer, with continuous circulation limited to 0.5-1.0 m/s linear flow in the trough. The relevant industry compliance framework is OEKO-TEX Standard 100 product class II for direct skin contact, ZDHC MRSL V3.1 for textile chemical inputs, and REACH Regulation (EC) No 1907/2006 for export to the EU. Curing is performed on a gas-fired stenter at 150-170°C for 90-120 s; fabric surface pH is verified with ISO 3071:2020 after finishing to ensure values below 7.5 for sensitive shades, and wash fastness is evaluated by AATCC 61-2A at 49°C. Terminal finished product types include jersey underwear, loop-knit towels, interlock sportswear, and cotton-elastane fitted sheets. The principal operational boundary is the presence of strong cationic fixers above 10 g/L; in such formulations, a pre-dilution of RH-NB-9907 in demineralized water at a 1:3 ratio before trough introduction reduces filtration on padder rollers and prevents pad roll build-up during runs exceeding 4,000 m.
Chromium-free retanned crust leathers coated with waterborne polyurethane dispersions develop surface tack during stacked storage at 35°C and 60% relative humidity; this condition is quantified with a spring-loaded block tester at 0.1 MPa contact pressure and 16 h dwell, and as a loss in wet rub fastness under ISO 11640:2018. RH-NB-9907 is post-added to the finish formulation at 1.0-2.0 wt% of the wet basecoat mixture and at 0.5-1.0 wt% of the topcoat, after the matting agent and before the associative polyurethane thickener, using a low-shear propeller mixer at 500-800 rpm for 15-20 min at 20-30°C. The downstream coating process consists of a reverse roll coater for the basecoat at 8-12 g/ft² wet application, a through-feed drying tunnel at 80-100°C, and a hydraulic plating press at 120°C and 50 kg/cm² for topcoat grain setting. Compliance for automotive interior leather is anchored to ISO 6452:2007 fogging and ISO 105-B02:2014 light fastness, with specific emission limits under OEM material specifications such as VDA 278:2011 for VOC and FOG values; non-automotive upholstery is screened under REACH Annex XVII. Terminal finished product types include milled automotive seat covers, steering wheel covers, upholstered furniture leather, and split leather shoe uppers. An operational boundary appears in waterborne finishes containing zinc stearate or calcium stearate at levels above 2.0 wt%; the combination can increase low-gloss surface mottling when topcoat drying is below 90°C, so separate storage trials at 40°C for 7 days are required before production-scale adoption.
In waterborne alkyd and alkyd-acrylate wood coatings, post-addition of RH-NB-9907 at 0.1-0.3 wt% of total formulation is conducted after the final let-down stage at 30-35°C; high-shear dispersion is not required because the product self-emulsifies under moderate agitation at 800-1,000 rpm in a 10-pole dissolver disc with a tip speed of 2-3 m/s. Circulated airless spray lines expose the coating to prolonged mechanical and thermal load; a 24-hour loop test using a piston pump with 15-20 MPa working pressure and a tip orifice of 0.011-0.015 in is used to screen viscosity drift, with cone-and-plate viscosity measured at 25°C according to ISO 2884-1:2020. The acceptance criterion is a deviation below 10% from the initial value after 24 h circulation; higher drift indicates competitive adsorption between the silicone polyether and the alkyd emulsifier at the air-liquid interface, which manifests as orange peel and cratering on vertical spray panels. Film quality is assessed by ISO 1519:2017 cylindrical bend test for flexibility, ASTM D4060-19 Taber abrasion for wear resistance, and ISO 2813:2014 gloss measurement at 60°; block resistance is evaluated at 50°C under 0.1 MPa for 16 h. Compliance for the EU wood-coating segment is based on REACH Annex XVII and EN 71-3:2019+A1:2021 migration limits when the coated surface is intended for toys, while indirect food-contact use requires FDA 21 CFR 175.300 and EU Regulation (EU) 10/2011 overall migration criteria. Terminal finished product types include interior kitchen cabinet doors, wooden picture frames, architectural trim, and decorative laminate furniture. The principal incompatibility is with high-acid-value alkyd resins above 20 mg KOH/g and with aluminum-based driers above 0.1% metal content, where the product can produce seeding during storage at 40°C.
In sulfate-free shampoos and body washes based on sodium C14-16 olefin sulfonate, cocamidopropyl betaine, and decyl glucoside, RH-NB-9907 is incorporated at 0.5-2.0 wt% as a nonionic conditioning silicone; the addition is made after surfactant neutralization and below 35°C as a 1:3 pre-dilution in deionized water to avoid local gelation at the vortex wall. The critical process variable is electrolyte tolerance: increasing sodium chloride from 0.5% to 1.5% reduces the cloud point of the silicone polyether phase and can shift a clear formula to pearlescent instability. Viscosity is measured with a Brookfield RV spindle 3 at 10 rpm and 25°C; target viscosity is formulation-specific but should not fall below 70% of the unfragranced control after 24 h. Stability is screened in chambers at 4°C, 25°C/60% RH, and 45°C for 12 weeks; phase separation exceeding 1.0% by volume at any condition is a rejection criterion. The product’s nonionic character allows co-formulation with cationic guar hydroxypropyltrimonium chloride up to 0.3%, but it is incompatible with high levels of anionic carbomer gels above 0.5% when pH falls below 5.0. Regulatory compliance is anchored to EU Regulation (EC) No 1223/2009, FDA 21 CFR 701.3 labeling, ISO 22716:2007, and REACH Regulation (EC) No 1907/2006. Terminal finished product types include daily sulfate-free shampoos, rinse-off conditioners, micellar body washes, and sensitive-skin hair cleansers. Operational boundary: do not combine with alpha-hydroxy acids above 5% at low pH 3.5 because the block copolymer’s cloud point shifts and silicone may deposit unevenly on hair fibers; published data for this specific configuration is limited.
When a glyphosate-isopropylammonium tank mix is prepared with hard water containing 800 mg/L CaCO3 equivalents, a nonionic self-emulsified block silicone oil can be added at 0.05-0.15% v/v to improve spreading on waxy leaf surfaces; the main compatibility risk is not the active ingredient concentration but the presence of ammonium sulfate at 1.0-2.0 kg/ha, which increases ionic strength and can induce phase separation. A sprayability screen uses a low-pressure hydraulic sprayer at 2-3 bar with an XR11003 flat-fan nozzle and 200 L/ha water volume; dynamic surface tension is recorded with a bubble pressure tensiometer at 20 ms surface age, and tank stability is assessed after 6 h at 15-25°C. The relevant regulatory framework is US EPA 40 CFR 180.1001(d) for inert ingredient tolerances, FAO/WHO Manual on development and use of FAO specifications for plant protection products, and EU Regulation (EC) No 1107/2009 for co-formulant approval; end-use labels in Europe also require compliance with Regulation (EU) No 547/2011 labeling provisions. Downstream processing consists of tank filling with half the water, addition of the adjuvant after water-soluble bags have dissolved, agitation at 200-400 rpm, then addition of the herbicide concentrate, followed by the remaining water; continuous spraying without recirculation is preferred because prolonged pump shear above 30°C can reduce the emulsion droplet uniformity. Terminal finished product types include glyphosate-isopropylammonium 480 g/L SL formulations, mesotrione SC tank mixes, and pyraclostrobin EC spray mixtures. Published data for RH-NB-9907 in this specific crop protection configuration is limited; screening should be extended to 5°C storage for emulsifiable concentrate mixtures because phase separation can occur below the cloud point of the silicone block copolymer.
In flexible polyether slabstock foam, a self-emulsified block silicone oil of the RH-NB-9907 type is screened as a cell-stabilizing surfactant at 0.5-1.2 php, but the processing window is narrow when exotherm temperatures exceed 38°C during continuous pouring because tin catalyst activation accelerates and the silicone polyether may partition away from the gas-liquid interface into the polymerizing matrix. The mixing setup is a low-pressure continuous slabstock head with a rotational speed of 4,000-6,000 rpm and air injection between 2-4 L/min; the formulation is a conventional 3,000-3,500 molecular weight polyether triol, toluene diisocyanate at an index of 108-112, water at 3.0-4.0 php, and stannous octoate at 0.15-0.25 php. Foam rise height, blow-off time, and cell count are measured under ASTM D3574-17; density and compression load deflection are determined by ISO 845:2006 and ISO 3386-1:1986 respectively, with a density acceptance range of 25-35 kg/m³ and a CLD 40% compression value between 3.0-5.0 kPa for standard furniture grades. The compliance platform is CertiPUR-US for flexible polyurethane foam and OEKO-TEX Standard 100 product class IV where applicable; automotive foam additionally requires ISO 6452:2007 fogging and OEM-specific VOC limits. Terminal finished product types include mattress cores, sofa seat cushions, carpet underlay, and automotive seating foam. Published data for RH-NB-9907 in this specific configuration is limited; before production use, evaluation of top skin collapse and side wall voids should be performed on a 30 kg pilot box pour at 20°C and 38°C because the product’s self-emulsification can increase water compatibility but may reduce closed-cell content under low air injection conditions.
Polyethylene terephthalate partially oriented yarn (POY) spin finish emulsions are prepared at 10-12% oil content, and RH-NB-9907 is added at 0.3-1.0% of the emulsion by mass as a fiber-to-metal lubricant and antistatic co-agent after the primary mineral oil/ethoxylated oleate base has cooled to 25-30°C. The stability of the emulsion is monitored with a laser diffraction particle size analyzer; a mean droplet diameter increase of more than 5% after 72 h at 45°C is used as the rejection limit. Application to the yarn proceeds through a metering pump to ceramic kiss rolls operating at 0.5-1.5 m/min surface speed, applying 0.3-0.8% oil on yarn weight; after drawing and texturing, the finish is removed or tolerated depending on the downstream process. Thermal stability of the finish is screened by thermogravimetric analysis at 200°C under nitrogen according to ISO 11358-1:2022; residue and decomposition onset are recorded to avoid varnish formation on draw panel heaters. The relevant compliance platform is REACH Annex XVII, OEKO-TEX Standard 100 product class I, and ZDHC MRSL V3.1 for textile auxiliaries. Terminal finished product types include POY for draw-textured yarn, air-jet textured polyester, needlepunch nonwovens, and sewing thread. An operational boundary appears when the spin finish emulsion contains more than 0.1% cationic antistatic agent; the cationic species can reduce the self-emulsification cloud point and cause varnish formation on draw panel heaters.
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Self-emulsified Block Silicone Oil RH-NB-9907 is a nonionic polysiloxane-polyoxyalkylene block copolymer supplied as a clear to slightly turbid viscous fluid. The product is formulated as a water-dispersible raw material rather than a finished microemulsion. Because the hydrophilic polyoxyalkylene segments are covalently bonded to the polydimethylsiloxane blocks, dilution in demineralized water at 20–30°C under low-shear agitation yields translucent dispersions with mean particle diameters typically below 80 nm. The absence of intentionally added external emulsifier distinguishes the product from conventional silicone macroemulsions stabilized by free nonionic or cationic surfactant packages.
| Parameter | Batch-release window | Method |
|---|---|---|
| Appearance at 25°C | clear to slightly turbid viscous liquid | visual inspection |
| Non-volatile content | ≥99.0 wt% | ISO 3251 |
| Dynamic viscosity at 25°C | 1500–3000 mPa·s | ISO 3219 |
| pH of 1 wt% aqueous dilution | 6.0–7.5 | ISO 4316 |
| Density at 25°C | 1.02–1.06 g/cm³ | ISO 2811-1 |
| Mean particle size after 5 wt% dilution at 300 rpm for 30 min | 40–80 nm | ISO 22412 |
| Polydispersity index after dilution | ≤0.25 | ISO 22412 |
| Alkylphenol ethoxylate content | not detected at 10 mg/kg | LC-MS/MS |
These parameters define the release envelope rather than the usable formulation window. The exact viscosity within the 1500–3000 mPa·s interval influences pumping configuration more than final dispersion quality. Diaphragm pumps with 25 mm double-ball check valves have transferred the material at 20°C without cavitation when the suction line is kept below 1 m in length. At 15°C, viscosity approaches the upper control limit, and transfer from 200 L drums may require a gear pump rather than a centrifugal pump because of shear-thinning behavior at low shear rates.
Rheometric characterization of the undiluted fluid on a cone-and-plate geometry with a 40 mm diameter and 1° cone angle at 25°C shows shear-thinning behavior: apparent viscosity decreases from 2400 mPa·s at 1 s⁻¹ to 1900 mPa·s at 10 s⁻¹ and 1450 mPa·s at 100 s⁻¹. No yield stress is detected. At 50°C, the viscosity falls to 950 mPa·s at 100 s⁻¹. This behavior means that diaphragm or gear pumps are preferred over progressing cavity pumps at start-up when the product is below 15°C, and heated jacketed lines above 30°C can reduce pump back-pressure during metering.
Unlike conventional silicone oils that rely on adsorbed external emulsifiers, RH-NB-9907 stabilises the oil-water interface through covalently bound polyoxyalkylene blocks. Under a rotor-stator homogenizer operating at a tip speed of 12 m/s, a 10 wt% dispersion reaches a steady median particle size after 5 minutes. A mechanically emulsified 350 mPa·s dimethylpolysiloxane fluid under the same tip speed can require 20–30 minutes and may display a bimodal size distribution if the surfactant premix is added after the oil phase. The block architecture maintains a single particle population at polydispersity index below 0.20 across dilution from 20 wt% to 0.5 wt% when water hardness is below 300 mg/L CaCO₃. At hardness above 500 mg/L CaCO₃, calcium ion screening of ether oxygens can raise the D90 from 90 nm to 150 nm within 48 h at 40°C. Demineralized or softened water is therefore required for long-term stability. Shear stability in a 100 L tank with a pitched-blade impeller at 800 rpm for 60 min produced no oil phase separation or filter blockage through a 150 μm bag filter.
Because the polyether block is nonionic, dilution under high-shear mixing entrains less air than many conventional emulsifier systems. A 10 wt% dispersion prepared with a rotor-stator mixer has an immediate foam height of 40 mm in a 100 mL graduated cylinder, collapsing to 5 mm after 10 min. In pad troughs, this reduces the need for silicone defoamers, although high-speed jet dyeing equipment may still require a small addition of a non-silicone defoamer. The cloud point of a 1 wt% aqueous dispersion is in the 35–55°C range; above this temperature the dispersion becomes turbid and can deposit on pad rolls, so pre-dilution should be conducted below 30°C.
Storage above 50°C or below 0°C is not recommended because the polyether block can separate from the siloxane matrix during prolonged exposure. In aqueous dispersion, the product is susceptible to siloxane redistribution under acid or alkaline conditions. At pH below 3.0 or above 10.0, measurable viscosity loss and an increase in low-molecular-weight cyclic siloxanes occur after 14 days at 40°C. Formulations should be maintained within pH 5.0–8.0 for storage exceeding 48 h. In buffered textile finishing baths at pH 5.5–6.5, no phase separation is observed for 72 h.
Application in textile finishing lines typically uses a 0.5–2.0 wt% active dilution in a pad trough. On a vertical padder with nip pressure of 3 bar and liquor pickup near 70% on bleached cotton interlock, the dispersion remains homogeneous during a 6 h production run without mechanical agitation beyond a low-speed paddle. The product forms an adsorbed layer during drying on a stenter frame with fabric temperature between 120°C and 150°C. The resulting handle is a dry, silky macro-effect, and the effect persists after five home-laundering cycles under ISO 6330:2012, Procedure 4G, with a treated-fabric whiteness index loss of less than 2.0 units as measured by ISO 105-J02. Co-application with anionic starches in the same bath is not recommended below pH 5.0 because localized precipitation can block the pad trough filters.
In rubber compression molding release applications, a 2–10 wt% dilution is sprayed using a 0.8 mm air-atomizing nozzle at 2 bar. The film deposited at 180°C mold temperature is non-transferring to EPDM surfaces and does not inhibit post-cure adhesion in subsequent bonding steps when adhesion values are measured according to ASTM D429-14, method B. In a 300-ton compression press with a 16-cavity mold running a sulfur-cured EPDM compound, a single spray application every 12 cycles was sufficient to maintain demolding without tear marks at the parting line; published data for this specific configuration is limited, and the cycle interval requires validation on the actual mold geometry and cure temperature. The product does not demand high-shear predilution and leaves lower residue after 100 cycles when compared with a conventional 350 mPa·s silicone fluid at the same active concentration, with extracted residue after 100 cycles of 0.8 g/m² versus 1.6 g/m² under an internal gravimetric method.
On full-grain leather, a 10 wt% dilution applied by spray at 4 g/m² wet pickup reduces surface friction without forming a glossy film. The product is compatible with water-based polyurethane leather finishes when the concentration is below 5 wt% of finish solids; above that level, surface haze can occur after heat setting at 120°C.
The most significant operational differences appear in predilution, filtration, and storage. A conventional 35 wt% amino-functional silicone macroemulsion may contain 8–12 wt% nonionic emulsifiers, which can migrate to fiber surfaces and alter wetting times. RH-NB-9907 contains no intentionally added external surfactant. In a continuous nonwoven carding line where spin finish is applied at 0.3 wt% oil on fiber weight, the dynamic surface tension at 1 Hz measured by bubble pressure tensiometry remains above 35 mN/m; this is higher than fast-wetting surfactant systems and represents a limitation when rapid rewetting is the primary requirement. The product reduces fiber-to-metal friction for polypropylene filaments run over ceramic guides at 600 m/min, with a measured reduction in yarn tension from 28 cN to 22 cN, although this result depends on filament denier and guide material.
| Comparison parameter | RH-NB-9907 | Amino-functional silicone macroemulsion | Dimethylpolysiloxane fluid |
|---|---|---|---|
| External emulsifier requirement | self-emulsifying block structure | 8–12 wt% free emulsifier | required, high shear |
| Mean particle size after dilution | 40–80 nm | 150–300 nm | >500 nm |
| Ionic character | nonionic | cationic or nonionic | nonionic |
| Yellowing on white cotton after 180°C for 1 min | ΔWI 1.2–2.0 units | ΔWI 4.0–8.0 units | ΔWI <1.5 units |
| APEO content | not detected at 10 mg/kg | depends on emulsifier package | depends on emulsifier package |
| Rubber mold residue after 100 cycles | 0.8 g/m² | no published value | 1.6 g/m² |
Under REACH, the product is not classified as hazardous under CLP. No Annex XIV SVHC substances are present above 0.1 wt%, and the product is not expected to contain alkylphenol ethoxylates above 100 mg/kg; compliance is demonstrated by LC-MS/MS. The product is not cleared as a direct food contact additive. For process discharge, standard wastewater treatment is suitable provided the emulsion is not destabilized with cationic coagulants at pH above 9.0. Avoid combination with concentrated quaternary ammonium compounds above pH 9.0 because coacervation can increase the particle size and block 50 μm filter bags. For applications requiring high water repellency or high contact angle, the product is not an appropriate substitute for high-molecular-weight polydimethylsiloxane fluids.
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