| HS Code | 494522 |
| Product Name | 80 Soft Silicone Oil RH-NB-680A |
| Chemical Composition | Modified polysiloxane silicone softener |
| Appearance | Colorless to light yellow transparent liquid |
| Ionic Type | Weak cationic/nonionic |
| Ph Value | 5.5-7.0 (1% aqueous solution) |
| Solid Content | 80% ± 2% |
| Viscosity | 2000-5000 mPa·s (25°C) |
| Solubility | Soluble or dispersible in water after emulsification |
| Emulsification | Easy to emulsify with nonionic emulsifier |
| Application | Soft finishing for cotton, polyester, nylon and blends |
| Dosage | 5-30 g/L as required |
| Packaging | 120 kg plastic drum or 200 kg plastic drum |
| Storage | Store in cool, dry, ventilated place; avoid freezing |
| Shelf Life | 6 months in unopened container |
As an accredited 80 Soft Silicone Oil RH-NB-680A factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | 80 Soft Silicone Oil RH-NB-680A is packed in 200 kg plastic drums or 1,000 kg IBC totes for shipment. |
| Container Loading (20′ FCL) | 80 Soft Silicone Oil RH-NB-680A packed in drums, loaded into a 20-foot FCL container, securely stowed for ocean shipment. |
| Shipping | `80 Soft Silicone Oil RH-NB-680A` is shipped in sealed, labeled drums or containers, protected from leaks, moisture, sunlight, and ignition sources. Store in a cool, dry, ventilated area. Handle and transport according to the SDS and applicable local, national, and international regulations. |
| Storage | Store 80 Soft Silicone Oil RH-NB-680A in a cool, dry, well-ventilated place away from direct sunlight, heat, sparks, and open flames. Keep containers tightly closed and clearly labeled; prevent moisture, dirt, and incompatible chemicals from entering. Use original packaging and adequate containment to avoid leaks. Maintain recommended temperature, inspect containers regularly, and follow local regulations and SDS requirements. |
| Shelf Life | Store RH-NB-680A in a cool, dry, well-ventilated area; in sealed original packaging, its shelf life is typically 12 months. |
In a continuous cotton interlock finishing range, 80 Soft Silicone Oil RH-NB-680A is prediluted at a ratio of 1 part product to 3 parts demineralised water before being metered into the pad trough. The non-volatile content of the product is 80% by mass when tested by ISO 3251 at 105 °C for 2 h. The working bath is built with 20–30 g/L of the product and 0.2–0.5 g/L acetic acid to hold the bath at pH 5.5–6.0. A horizontal two-roll padder applies the bath at 2.0–2.5 bar nip pressure and 8–12 m/min line speed, yielding 65–70% wet pick-up on bleached cotton. The fabric is dried and cured on a stenter frame at 150 °C for 90–120 s. Over-curing above 160 °C shifts the amine-modified silicone film toward yellowing, which is assessed by ISO 105-B02 xenon exposure. The finished cotton jersey shows lower surface friction and a softer handle; drape coefficient is measured with a Kawabata KES-FB2 system. Wash-fastness is evaluated using AATCC 61 4A, and the softness rating is retained after 5 home-laundry cycles. The process is not compatible with strongly anionic optical brighteners in the same bath; pad bath stability drops below 24 h when the pH is outside 5.0–6.5. Compliance is checked against OEKO-TEX Standard 100 class I or II, ZDHC MRSL v3.1, and bluesign BSSL. The final articles include T-shirts, polo interlock garments, and infant sleepwear after additional formaldehyde and extractable metal screening.
Soft nappa and suede processing requires RH-NB-680A to be dosed at 1.5–3.0% on wet-blue weight during neutralisation or fatliquoring. The drum is operated at 12–16 rpm for 30–45 min with a liquor ratio of 1.5:1. The float is adjusted to pH 5.0–5.5 with sodium formate or sodium bicarbonate before the silicone is added. Direct contact with anionic fatliquors in the same float causes partial breaking of the cationic silicone emulsion and visible grain spotting. A separate intermediate rinse of 10 min is therefore required when strongly anionic retanning agents are used. Fixation is completed with 0.5% formic acid diluted 1:5 and run for 20 min. The resulting leather has a soft, dry handle and lower dynamic friction under ISO 11640 rubbing; the coefficient of friction is typically reduced to 0.35–0.45. Pale leathers are exposed under ISO 105-B02 xenon arc for 72 h, and the sample containing 3.0% silicone shall not drop more than a half-grade. Finished products include nappa shoe uppers, garment suede, and chrome-free automotive interior leather. Regulatory checks include REACH Annex XVII for restricted aromatic amines and ZDHC MRSL v3.1 for chromium VI and heavy metal cross-contamination.
To prevent mould sticking in high-hardness EPDM compression moulding, RH-NB-680A is diluted with deionised water at a 1:20 volume ratio, giving 5–10 g/L silicone actives. Mould surfaces are preheated to 175–190 °C and sprayed with a 0.5 mm air-atomising nozzle at 0.35 MPa air pressure. The water flashes off within 3–5 s, leaving a cured release film of 0.2–1.0 µm. The film remains thermally stable across 30–40 demoulding cycles before reapplication is required. Over-application above 2.0 µm dry film transfers to the rubber part and reduces post-mould adhesion of solvent-based edge coatings; silicone contamination is detected by water contact angle greater than 95° on the cured surface. Release force on a flat laboratory mould is assessed with a tensile pull-off fixture, although published data for this specific configuration is limited. The product is used for high-hardness EPDM compounds above 85 Shore A where non-silicone release agents fail. Compliance for automotive seals references REACH EC 1907/2006 and RoHS 2011/65/EU; total polycyclic aromatic hydrocarbons are below 0.1 mg/kg in the prepared bath. The final articles are EPDM gaskets, O-rings, and anti-vibration mounts.
| Application route | Dose or dilution | Working pH | Equipment | Fixation or cure |
|---|---|---|---|---|
| Cotton interlock pad finishing | 20–30 g/L product | 5.5–6.0 | Two-roll padder 2.0–2.5 bar | 150 °C / 90–120 s |
| Vacuum drum leather softening | 1.5–3.0% on wet-blue | 5.0–5.5 | Rotating drum 12–16 rpm | Formic acid 0.5% / 20 min |
| EPDM mould release | 1:20 dilution / 5–10 g/L | Not specified | Air-atomising spray 0.35 MPa | Flash-off 3–5 s at 175–190 °C |
| Water-based acrylic lacquer | 0.1–0.3 wt% | 7.0–8.0 | Dissolver 1000 rpm / 15 min | Ambient or forced air |
In water-based acrylic furniture lacquers, RH-NB-680A is post-added at 0.1–0.3 wt% on total formulation. A high-shear disperser with a 40 mm dissolver blade is operated at 1000 rpm for 15 min; shear above 1500 rpm may destabilise the dispersion and produce microfoam. The additive reduces surface slip and improves mar resistance when the dry film is tested under ASTM D2197 scrape adhesion. Above 0.5 wt%, the additive creates surface tension gradients that cause crawling and intercoat adhesion loss; cross-cut adhesion tested under ISO 2409 falls from classification 0 to 2 or worse. A 60° gloss measurement under ISO 2813 shows a 3–5 GU reduction at the overdosage point. The finished lacquer is used on children’s furniture and must satisfy EN 71-3 migration limits for barium, cadmium, chromium, lead, and mercury. VOC content stays below 5 g/L when the silicone is added as an 80% non-volatile component. The final articles include nursery tables, laminated chair sets, and MDF drawer fronts.
| Application | Standard or regulation | Relevant requirement or test method |
|---|---|---|
| Textile finishing | OEKO-TEX Standard 100, ZDHC MRSL v3.1 | Extractable heavy metals, aniline, formaldehyde below limits |
| Leather finishing | REACH Annex XVII, ISO 105-B02 | Restricted amines below 30 mg/kg; light fastness >3–4 |
| Rubber release | RoHS 2011/65/EU, REACH EC 1907/2006 | PAH below 0.1 mg/kg; release film transfer limited |
| Wood coatings | EN 71-3, ISO 2409 | Migration element limits; cross-cut classification 0–1 |
| Hair care | EC 1223/2009, ISO 11930 | Safety assessment; preservative challenge |
| Car care | EU 2004/42/EC, ISO 2813 | VOC <0.5%; gloss 35–55 GU |
RH-NB-680A is incorporated at 0.5–2.0% active silicone in an ethanol-water or low-viscosity oil-in-water base. The batch is homogenised at 8000–12000 rpm for 3 min using a rotor-stator homogeniser, then cooled below 40 °C before pH adjustment. The amino-functional silicone deposits preferentially on bleach-damaged hair because the fibre surface charge is more anionic after oxidative treatment. A combing force reduction of 15–30% versus untreated hair is typically observed, depending on hair type and damage level. The final serum is subject to safety assessment under EC 1223/2009 and manufactured under ISO 22716; preservative efficacy testing follows ISO 11930. The use range is constrained at 2.0% because higher deposition can produce visible build-up on fine hair and increase foam-back during shampooing. The product is not combined with low-pH acids below pH 4.0 for prolonged storage due to hydrolysis risk. Published data for this specific configuration is limited beyond standard panel testing. Finished formats include leave-in conditioners, split-end serums, and heat-protectant sprays.
Tyre sidewall dressing concentrates built with RH-NB-680A are compounded as water-in-silicone emulsions or anhydrous solvent-free systems. The concentrate is cut 1:1 to 1:2 with demineralised water and applied by low-pressure spray at 0.20–0.35 L/min through a fan nozzle. After wipe-down, a dry film of 2–5 µm remains on the rubber sidewall. The dressing exhibits 60° gloss readings between 35 and 55 GU under ISO 2813, depending on the silicone-to-water ratio. The film cures within 24 h at 23 °C and shall not transfer to a white glove after 24 h cure. High-shear mixing at 1000–1500 rpm is used for 10–15 min to avoid emulsion inversion. The final product is classified as a ready-to-use car care product; compliance with EU 2004/42/EC VOC limits for automotive care products is maintained because the formulation does not contain volatile organic solvents above 0.5% by mass. Finished articles are tyre dressings, exterior trim coatings, and rubber floor mat refurbishers.
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The product designated 80 Soft Silicone Oil RH-NB-680A is supplied as an amino-functional polydimethylsiloxane fluid in which a low amine value is combined with a nominal non-volatile content of 80%. The model number RH-NB-680A identifies the formulation variant within the manufacturer’s softening-oil series; the numerical prefix denotes the non-volatile solids target rather than kinematic viscosity. The fluid is water-dispersible under low-shear dilution, but it is not a ready-to-use textile softener. It enters production as a high-solids intermediate for pad-dry-cure finishing, exhaust application, fiber spin-finish modification, and release-surface treatment. The presence of pendant aminoethylaminopropyl functionality distinguishes it from trimethyl-terminated polydimethylsiloxane fluids and from methyl-hydrogen silicone oils, because the amino group increases adsorption on cellulosic substrates and permits post-deposition condensation within the cure window.
Supplier acceptance documentation for RH-NB-680A should be used as the primary specification; where no public certificate is available, the following product-class reference windows are used for incoming inspection. Non-volatile matter is determined by ISO 3251:2019 at 105 °C for 2 h; the acceptance window is 78–82%. Kinematic viscosity at 25 °C by ISO 3104 is 600–1200 mm²/s. The amine value, obtained by potentiometric titration based on ASTM D2896, is 0.15–0.35 mmol/g; this low amine value is a deliberate formulation constraint to limit yellowing after high-temperature cure. The pH of a 10% aqueous dilution is 5.0–7.0. Density at 25 °C by ISO 2811-1 is 0.98–1.02 g/cm³. Apparent viscosity by ISO 2555 using a Brookfield LV spindle 2 at 30 rpm is typically lower than capillary kinematic viscosity because of non-Newtonian shear thinning; this should not be misinterpreted as a non-volatile content failure.
Production transfer pumps should be gear or progressive cavity type, not centrifugal, to avoid localized shear-induced gel formation. Distribution lines should be stainless steel 316L or high-density polyethylene; unlined carbon steel should be avoided because trace iron accelerates condensation and gel formation. Storage outside the range of 5–40 °C can produce phase separation or skin formation; drums should be sealed under nitrogen if held beyond 6 months. The product should not be frozen, because repeated freeze-thaw cycles above 3 cycles can reduce dispersibility and shift the amine value. Incoming batches should be re-homogenized by low-speed drum rolling at 10–20 rpm for 30–60 min before sampling; sampling should follow ISO 5555 for representative liquid samples.
Hard water cations above 150 ppm CaCO3 are the primary limitation in exhaust and padding baths. Calcium and magnesium ions compress the electrostatic double layer around dispersed amino-functional silicone droplets; the resulting collision frequency increases creaming and roller build-up. On production dyeing machines with circulation pumps, shear forces in the main vessel can accelerate droplet coalescence when the bath pH is outside 5.5–6.5. The dilution sequence should therefore add the product to demineralized water under slow agitation at 300–500 rpm; reverse addition—water into product—should be avoided because localized inversion produces gel particles. If bath hardness exceeds 150 ppm CaCO3, a sequestrant compatible with non-ionic/weakly cationic systems, such as a phosphonate-based agent at 0.5–1.0 g/L, should be dosed before the silicone fluid. Continuous padding ranges with trough turnover times longer than 15 min may need bath renewal to prevent concentration drift caused by preferential adsorption onto cotton fiber surfaces.
Operational boundary conditions are narrow. Avoid combination with anionic wetting agents, sulfonated oils, or strong oxidizers; avoid working-bath pH below 4.5 or above 8.0. High-shear homogenization above 1500 rpm is not recommended because it can generate stable foam and reduce exhausted film uniformity. Filter plugging on 50–100 μm suction screens is an early indicator of destabilization; if screen differential pressure rises above 0.5 bar, the bath should be checked for hardness, pH excursion, or residual anionic surfactant from incomplete scouring.
Conventional trimethyl-terminated polydimethylsiloxane fluids at high non-volatile content are hydrophobic, require external surfactant for water dispersion, and show limited launderability on cotton. In contrast, RH-NB-680A contains aminoethylaminopropyl groups that protonate in weak acid baths and adsorb onto cotton, regenerated cellulose, and polyester/cotton blends. This adsorption changes the cure requirement: the softener must be dried and cured to condense silanol groups and bond the film to fiber surfaces. A production pad-dry-cure range using a two-roll vertical padder with nip pressure 2.5–3.0 bar and pick-up of 70–85% on 180–220 g/m² cotton interlock typically runs at 110–130 °C for 90–120 s in the drying section and 150–160 °C for 60–90 s in the curing section. The cure window is critical; temperatures below 145 °C produce incomplete fixation and weak wash fastness, while temperatures above 170 °C increase amino-group yellowing and can reduce fabric tear strength.
Compared with high-amine-value amino silicone fluids, RH-NB-680A has a lower amine value, lower bath viscosity, and lower yellowing tendency on white cotton poplin tested by AATCC TM 110; however, the hand depth may be slightly less pronounced. Compared with standard microemulsion softeners at 30% non-volatile content, the 80% fluid reduces shipped water mass and allows on-site dilution, but it requires more careful emulsification and longer mixing time. Compared with hydrophilic silicone softeners, RH-NB-680A is not formulated to maximize moisture wicking; it should not be used for medical nonwovens or sport apparel where hydrophilicity is the primary specification.
| Comparison dimension | 80 Soft Silicone Oil RH-NB-680A class | Trimethyl-terminated PDMS fluid | High-amine-value amino silicone fluid |
|---|---|---|---|
| Non-volatile matter | 78–82%, ISO 3251:2019 | 95–100% for non-emulsified PDMS | 60–90% depending on grade |
| Amine value | 0.15–0.35 mmol/g | Not detected by ASTM D2896 titration | 0.6–1.2 mmol/g |
| Water dispersibility | Low-shear self-dispersible; hard water sensitivity | Requires external non-ionic surfactant | Readily dispersible; may form microemulsion |
| Wash durability on cotton after 5 cycles AATCC TM 61 | Moderate to high | Low | High |
| Yellowing tendency after cure at 170 °C | Low to moderate | Low | Moderate to high |
| Cure requirement | Required at 150–160 °C | Not required for film formation | Required at 150–165 °C |
In exhaust application, the product is metered into the dye bath after dyeing or during the final rinse. For cotton interlock in a low-liquor-ratio jet machine at liquor ratio 1:6 to 1:8, the working dosage is 0.5–2.0% on weight of fabric. The bath is set at 35–40 °C and adjusted with acetic acid to pH 5.5–6.5 before the silicone fluid is added. Addition should occur slowly over 10–15 min with pump speed reduced to 60–70% of dyeing circulation; excessive shear can cause droplet size reduction and foam generation. After the product has been added, the bath is run for 15–20 min, then drained. Fabric is hydro-extracted and dried at 110–130 °C; a separate curing step at 150–160 °C is required for washfastness.
On polyester-cotton blended fabrics, the adsorption capacity is lower than on pure cotton; therefore, the dosage should be held in the lower half of the range, 0.5–1.0% owf. Residual silicone in the bath can interfere with subsequent dyeing; machines should be rinsed with hot water at 60 °C and 0.5 g/L non-ionic detergent after draining. Published data for this specific configuration is limited; production trials with actual machine geometry and load density are required to establish the precise addition sequence.
For fiber spin-finish modification, the product can be applied as a diluted emulsion at 0.1–0.5% active silicone on fiber weight; in high-speed texturing lines, the lubricating film reduces friction against ceramic guides. The film must be dried before winding; residual water above 0.5% can cause blocking on package ends. Do not use where downstream dyeing requires high absorbency; the hydrophobic film may resist dye penetration unless subsequently scoured.
Regulatory compliance should be confirmed against the supplier’s REACH Registration, Safety Data Sheet, and RoHS Directive 2011/65/EU Annex II declarations for lead, mercury, cadmium, hexavalent chromium, PBB, and PBDE at threshold concentrations. For food-contact applications, only grades verified under FDA 21 CFR 176.170 or 21 CFR 176.180 for paper and paperboard should be used; RH-NB-680A should not be assumed compliant without written food-contact clearance. The product is not intended for medical-implant or parenteral applications. Do not blend with strong alkalis above pH 9, strong mineral acids below pH 3, or oxidizing agents. When the product is used in release applications, test the cured film on the actual substrate with the specific adhesive under ASTM D3330 peel adhesion conditions before full production.
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