| HS Code | 890890 |
| Product Type | Polyvinyl acetate emulsion adhesive |
| Appearance | White milky liquid |
| Solid Content | Approximately 55% |
| Viscosity | Approximately 4500 mPa·s at 25°C |
| Ph | 4.5 to 5.5 |
| Density | Approximately 1.1 g/cm³ at 25°C |
| Glass Transition Temperature | Approximately 30°C |
| Film Characteristics | Transparent and flexible when dried |
| Tack | Fast initial tack |
| Water Resistance | Moderate water resistance |
| Storage Stability | Stable for 6 months when stored at 5°C to 40°C |
As an accredited Resyn 7480 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Resyn 7480 is supplied in 55-gallon drums, 5-gallon pails, or bulk tanker quantities, with packaging selected per customer requirements. |
| Container Loading (20′ FCL) | 20′ FCL loading of Resyn 7480: packed on pallets, drums secured, weight optimized, sealed for safe chemical transport. |
| Shipping | Resyn 7480 is a non-hazardous polyvinyl acetate emulsion adhesive. It ships in drums, IBC totes, or bulk tankers. Not regulated as dangerous goods under ADR/IMDG/IATA. Protect from freezing and excessive heat; keep containers sealed and upright during transport. |
| Storage | Store Resyn 7480 in tightly sealed, original containers in a cool, dry, well-ventilated area away from direct sunlight, heat, and ignition sources. Avoid freezing and extreme temperature fluctuations. Keep containers upright to prevent leaks, inspect periodically, and label clearly. Follow manufacturer’s shelf-life recommendations, and keep out of reach of unauthorized personnel. |
| Shelf Life | Store Resyn 7480 in original sealed containers at 50–80°F; shelf life is 12 months from manufacture, avoiding freezing. |
Resyn 7480 is introduced into anhydrous ethanol/dimethyl ether aerosol systems as a neutralized carboxylated vinyl acetate copolymer at 2.5–4.5 wt% polymer solids relative to total batch mass. Neutralization is carried out with 2-amino-2-methyl-1-propanol at 0.8–1.0 molar equivalents of available carboxyl content; incomplete neutralization below 0.6 equivalents leaves the polymer insufficiently solubilized and creates valve-stem precipitation during high-speed rotary aerosol filling. Regulatory compliance for this format includes EC 1223/2009 Annex II and Annex III screening for residual monomer and restricted substance content, ISO 22716:2007 for cosmetic manufacturing hygiene, Directive 75/324/EEC for aerosol dispenser pressure and labelling, and REACH EC 1907/2006 for registration and SVHC screening. The downstream production sequence uses a closed jacketed vacuum vessel equipped with a top-entering anchor agitator and side-swept PTFE scraper; ethanol is charged first, powder is added under vortex at 400–600 rpm, and neutralizer is injected over 20–30 minutes to avoid localized pH excursion above 9.5.
After neutralization, the batch is passed through a 10 µm stainless steel cartridge filter and held at 20–25°C before transfer to a Pamasol or Aerofill pressure gasser. Dimethyl ether is injected at 0.35–0.45 MPa through the valve or by cold filling at -20 to -10°C; valve crimping collet tension is set to supplier specification and verified by destructive pull testing at ≥100 N on hourly samples. Leak testing is conducted in a 50°C water bath; pressure rise above 0.6 MPa at 50°C indicates overpressure and requires can disposal. Terminal product types include 55% VOC and 80% VOC aerosol hairsprays, anti-frizz aerosol finishing sprays, and sprayable heat protectant systems where film former content remains below 4.5 wt% to avoid propellant incompatibility. On production-scale rotary lines running 10,000–12,000 cans/hour, intermittent spray angle deviation has been associated with ethanol evaporation at the valve cup when crimping is delayed beyond 300 seconds after propellant injection, a failure mode that is not easily reproduced in laboratory batch trials.
In non-aerosol pump systems where ethanol is partially replaced by water to meet 55% volatile organic compound limits, Resyn 7480 is incorporated at 2.0–4.0 wt% polymer solids. The primary drying-rate constraint is the ethanol:water ratio; water fractions above 35 wt% slow film formation sufficiently to create tack at 25°C/50% RH unless polymer level is moved toward the lower bound of the specified range. Compliance with California Code of Regulations Title 17, Subchapter 8.5, Article 2 for hair styling consumer products must be verified on the finished formulation; EC 1223/2009, US FDA 21 CFR 701 labelling, and ISO 22716:2007 production controls apply. The manufacturing sequence uses a covered stainless steel mixing vessel with a bottom-mounted disperser and auxiliary propeller; ethanol and water are premixed, the polymer is added under agitation at 300–500 rpm, and 2-amino-2-methyl-1-propanol is dosed to reach a final pH of 7.0–7.8. After neutralization the batch is cooled to 18–22°C, filtered through 20 µm polypropylene cartridge filters, and filled into metered pump dispensers calibrated at 0.12–0.18 mL per stroke. The terminal product family includes non-aerosol pump hair sprays, taming mists, and low-VOC finishing sprays for humid climates. At filling speeds above 150 units/min, pump nozzle obstruction is managed by maintaining filtration at 20 µm and avoiding polymer solids above 4.0 wt%, which raises concentrate viscosity above 25 mPa·s and produces inconsistent spray patterns.
Hydrocarbon-propelled mousse systems require a lower film-former dose because expansion of liquefied propellant creates a wet foam in which excessive polymer rigidity destabilizes bubble films after discharge. Resyn 7480 is added at 1.2–3.0 wt% solids in the aqueous/ethanol concentrate before propellant saturation. The concentrate is prepared in a jacketed vessel with a rotor-stator homogenizer; nonionic ethoxylated surfactants are dispersed at 40–50°C, the polymer is introduced as a neutralized ethanol solution, and the batch pH is adjusted to 7.0–7.5 with 2-amino-2-methyl-1-propanol. After cooling to 15–20°C, the concentrate is transferred to a pressure vessel and gassed with A-46 hydrocarbon propellant at 0.30–0.40 MPa. Compliance requirements include EC 1223/2009, Directive 75/324/EEC, and ISO 22716:2007. Terminal products include styling mousse, conditioning mousse, and aerosol root-lift foam discharged through Coster or Aptar valves with 0.5–0.8 mm actuator orifices. During continuous high-speed gassing at 120–180 cans/min, foam density is checked every 15 minutes; deviations above 0.12 g/mL typically indicate polymer agglomeration at the dip tube inlet and are corrected by reducing concentrate viscosity below 2,000 mPa·s or increasing ethanol fraction by 3–5 wt%.
At water contents above 40 wt%, the neutralized Resyn 7480 system shifts from alcohol-dominated to water-dominated rheology and must be handled as a microbiologically vulnerable leave-on product. The polymer addition is reduced to 0.8–2.5 wt% solids to control viscosity build and residual tack. The manufacturing sequence uses a vacuum emulsifier with side sweep and high-shear dispersion head; carbomer or acrylate rheology modifiers are hydrated first, then the neutralized Resyn 7480 ethanol solution is added at 35–40°C below the cloud point of any nonionic emulsifier. Preservation is validated according to ISO 11930:2019 challenge test criteria for category 2 leave-on products; compliance also requires EC 1223/2009 Annex V for preservative restrictions, ISO 22716:2007, and microbial limits aligned with ISO 17516:2014. Terminal products include transparent styling gels, alcohol-free curl creams, and water-based edge-control lotions. Because carboxylated film formers are anionically charged after neutralization, combination with cationic conditioning polymers above 0.1–0.3 wt% can form coacervate precipitates; compatibility is maintained by prediluting cationic components to 1% and adding under high shear. In-process clarity is monitored by transmittance at 550 nm; values below 85% indicate microphase separation and require correction of neutralizer level or alcohol co-solvent content.
This application scope covers styling products formulated to maintain fiber separation and curl geometry at 25°C/90% RH for 8–24 hours. Resyn 7480 is incorporated at 3.0–5.0 wt% polymer solids, with the high bound reserved for maximum-stiffness systems and the low bound for flexible-hold curl defining sprays. The production condition of greatest consequence is neutralizer ratio; the film develops higher tensile modulus after neutralization with 2-amino-2-methyl-1-propanol at 0.8–1.0 molar equivalents, while excess neutralizer above 1.1 equivalents plasticizes the film and reduces high-humidity curl retention. Compliance frameworks include EC 1223/2009 for cosmetic ingredient safety, REACH EC 1907/2006 for registration and SVHC screening, and US FDA 21 CFR 701 for cosmetic ingredient labelling. Process design uses a closed mixing system under nitrogen at 20–25°C; the polymer is neutralized in ethanol before water dilution to avoid precipitation. The finished liquid is filled into aerosol or pump formats and evaluated with a texture analyzer using a three-point bending fixture; target stiffness values for a 100 µm dry film are typically 20–60 MPa depending on plasticizer load. Terminal product types include anti-humidity hair sprays, curl retention mists, and high-hold pump sprays for humid climates. A production bottleneck at this addition range is the increase in concentrate viscosity to 30–80 mPa·s, which must be matched to filling pump stroke or actuator orifice to retain spray symmetry at 0.20–0.25 mL per stroke.
High-solids oil-continuous edge-control systems absorb the neutralized Resyn 7480 ethanol solution into a molten wax-oil matrix at 55–65°C. The polymer is added at 1.0–3.5 wt% solids, while the concentrate contains 10–25 wt% hydrogenated vegetable oil, 5–15 wt% microcrystalline wax, and 5–12 wt% emulsifiers such as polysorbate 60 and sorbitan stearate. The process uses a jacketed planetary mixer under vacuum to prevent air entrapment; the oil phase is melted and homogenized, then the neutralized polymer solution is injected slowly below the melt surface at 3–5 kg/min for a 500 kg batch. Dropping the batch temperature below 45°C before dispersion is complete can cause polymer-rich striations in the finished pomade. Compliance requirements include EC 1223/2009 for leave-on skin contact, ISO 22716:2007, and US FDA 21 CFR 701 labelling; if the product carries a sunscreen claim, the applicable regional sunscreen monograph applies, but the polymer functions only as film former. Terminal product categories include edge-control wax, non-flaking sculpting pomade, and water-resistant styling adhesive for braided styles. On production-scale planetary mixers with 1.5–2.0 m³ working volume, incomplete phase inversion is detected by oiling-out at ≥40°C; the correction is to reheat to 60°C and shear at 25 rpm for 10 minutes before controlled cooling.
Competitive Resyn 7480 prices that fit your budget—flexible terms and customized quotes for every order.
For samples, pricing, or more information, please contact us at +8615380400285 or mail to sales2@liwei-chem.com.
We will respond to you as soon as possible.
Tel: +8615380400285
Email: sales2@liwei-chem.com
Flexible payment, competitive price, premium service - Inquire now!
Resyn 7480 is a high-solids polyvinyl alcohol-stabilized polyvinyl acetate homopolymer emulsion supplied as an aqueous dispersion for waterborne adhesive compounding. Published typical specification ranges place solids at 54–56% by mass, pH at 4.0–5.0, and Brookfield RVT viscosity at 20 rpm and 25 °C between 1,500 mPa·s and 2,500 mPa·s. The polymer is characterized by a glass transition temperature near 38 °C and a minimum film formation temperature of 15–18 °C, which means that continuous film formation requires either coalescing aids or elevated substrate temperature. The grade is used in paper-to-paper lamination, carton side-seam and bottom-seam bonding, tube winding, and interior wood assembly where rapid development of fibre-tearing bonds on cellulosic substrates is required.
At 54–56% solids, the emulsion displays shear-thinning flow and rapid wet tack on porous kraft and corrugated board. The product is supplied without solvent; formulators introduce coalescents such as 2,2,4-trimethyl-1,3-pentanediol monoisobutyrate or benzoate ester plasticizers only where substrate porosity is low or where stack pressure is applied after drying. Residual vinyl acetate monomer is generally specified at or below 0.1% by mass, and the polymer is compatible with starch, dextrin, calcium carbonate, clay, and many standard waterborne adhesive extenders. Because the colloid is acid-buffered, pH drift during extended machine runs must be controlled.
In high-speed wheel and slot-nozzle applicators running between 150 m/min and 250 m/min, viscosity stability depends on replenishment of evaporated water and on trough residence time. Industrial handling reports indicate that viscosity drift during an 8 h shift can be held within ±10% when makeup water is added in 1–2% increments and trough residence time does not exceed 4 h. Published production-scale datasets for this specific configuration are limited; local rheological profiling is required for narrow nozzle gaps below 0.15 mm.
Because the minimum film formation temperature is 15–18 °C and the glass transition temperature is near 38 °C, the practical web surface temperature in tube winding must be held above 45 °C. Below this level, the dried film can exhibit microcracking and reduced fibre pick. At the opposite boundary, web surface temperatures above 80 °C can produce rapid skinning at the nozzle edge, generating grit and blocking applicator openings. The acceptable processing window for continuous rod coating on 80 g/m² kraft is therefore approximately 45 °C to 80 °C under 2–3 m air-oven dwell. Wet film thickness below 50 µm can cause excessive penetration into absorbent board, while thickness above 150 µm can create surface skinning before internal coalescence.
Rheological control in starch-containing blends is strongly pH-sensitive. Above pH 6.5, borax-reacted polyvinyl alcohol-stabilized networks can lose stability, producing a rapid viscosity increase and reduced mechanical shear stability. Plant practice often includes 0.1–0.5% sodium bicarbonate or citrate buffer to hold pH within the 4.0–5.5 range during addition of alkaline extenders. The emulsion is shear-thinning; increasing applicator shear reduces apparent viscosity by a factor of 2–4 compared with low-shear Brookfield values, but excessive shear from high-speed centrifugal pumps can introduce air and destabilize the protective colloid.
| Property | Test method | Published range or typical value |
|---|---|---|
| Solids content | ISO 3251, 105 °C, 2 h | 54–56% |
| Brookfield RVT viscosity | ASTM D2196-20, spindle 4, 20 rpm, 25 °C | 1,500–2,500 mPa·s |
| pH | ISO 976, 25 °C | 4.0–5.0 |
| Density | ISO 2811-1, 25 °C | 1.07–1.09 g/cm³ |
| Glass transition temperature | ISO 11357-2, DSC | 38 °C typical |
| Minimum film formation temperature | ISO 2115 | 15–18 °C |
| Average particle size | Laser diffraction or disc centrifuge | 0.8–1.5 µm |
Dilution with deionized water produces a predictable viscosity decrease. Adding 5% water generally lowers Brookfield RVT viscosity to approximately 800–1,200 mPa·s, but the response depends on pH, shear history, and the presence of associative additives. Overdilution below 45% solids can reduce wet tack and increase strike-through on low-basis-weight papers, causing blocking in high-stack-pressure converted stacks.
Resyn 7480 differs from vinyl acetate-ethylene copolymer emulsions in the 0–5 °C glass transition class primarily by higher heat resistance and faster fibre tear development on absorbent board. Vinyl acetate-ethylene copolymers containing 10–25% ethylene produce films with lower modulus and improved adhesion to polyethylene and polyester films. By contrast, the polyvinyl acetate homopolymer forms a harder, more polar film that bonds rapidly to paper and wood but shows reduced wet strength under prolonged water contact. When compared with acrylic emulsion binders, the homopolymer has poorer ultraviolet-light resistance and lower hydrolysis resistance under alkaline conditions, but its specific adhesion to cellulose and its cost-to-tensile-shear ratio are generally more favourable in dry interior applications.
Matched against solventborne vinyl resins, Resyn 7480 eliminates the need for ketone or ester solvent handling and reduces fire hazard during storage, but unmodified dried films have lower water and chemical resistance than solventborne vinyl chloride-vinyl acetate copolymers. In carton sealing, the aqueous homopolymer provides immediate wet tack on porous substrates, whereas many acrylic dispersions require higher dry-binder addition to reach equivalent initial tack. For remoistenable adhesive applications, the dried polyvinyl acetate film is not readily remoistenable with water; dextrin or starch-based formulations remain preferable for envelope and label remoistening.
Within the polyvinyl acetate homopolymer family, lower-viscosity grades in the 800–1,200 mPa·s range are often selected for sprayable corrugating tie coats, while higher-viscosity grades above 5,000 mPa·s are used in mastic and profile wrapping. Resyn 7480 occupies the mid-viscosity range applied by wheel, roller, and slot-nozzle equipment. Its protective-colloid stabilization also reduces misting at high machine speeds compared with low-molecular-weight polyvinyl alcohol grades.
When heat-assisted lamination replaces cold-press assembly in woodworking, the higher glass transition temperature of Resyn 7480 becomes a processing advantage rather than a limitation. Press temperatures of 60–80 °C allow the dried adhesive layer to soften sufficiently for flow into veneer or edgebanding surfaces without requiring high levels of plasticizer. Unmodified films of the homopolymer are not recommended for exterior exposure or direct water immersion; for D3 water-resistant wood adhesive performance under EN 204, formulators typically evaluate crosslinking additives such as glyoxal, blocked isocyanate, or urea-formaldehyde condensate at 5–10% of total adhesive solids. Published data for Resyn 7480 in D3 wood adhesive formulations is limited; mechanical shear testing on beech substrates per EN 205 is required for each formulation.
Batch-to-batch variance is most often observed as viscosity shifts following temperature excursions during storage. Unopened containers stored at 5–40 °C retain specification viscosity for at least 12 months, but partial freeze-thaw exposure can produce irreversible grit and should be rejected. In woodworking plants, the product is typically mixed in low-shear planetary or propeller mixers at 100–300 rpm; high-speed dispersers above 1,000 rpm may introduce excessive foam and reduce adhesive transfer to the substrate.
| Regulatory or compliance reference | Relevant scope | Verification requirement |
|---|---|---|
| FDA 21 CFR 175.105 | Adhesives used in food-contact packaging | Component-level compliance; end-use migration testing may be required |
| FDA 21 CFR 176.170 | Components of paper and paperboard in contact with aqueous and fatty foods | Migrate testing under 21 CFR 176.170(c) |
| REACH | European Union registration and hazard communication | SDS is the controlling document |
| RoHS 2011/65/EU | Electrical and electronic equipment adhesives | No intentionally added lead, cadmium, mercury, hexavalent chromium, PBB, or PBDE |
Application boundaries include minimum storage and handling temperature of 5 °C. Unformulated Resyn 7480 is freeze-thaw unstable and should not be exposed to temperatures below 0 °C; a single freeze cycle may result in irreversible grit formation. Contact with zinc-galvanized or unlined mild steel is not recommended because the acidic pH can corrode ferrous surfaces and introduce destabilizing cations. Dilution water should have low hardness, preferably below 20 °dH, to avoid agglomeration. The product is not compatible with concentrated polyvalent salt solutions used as water-resistance additives; aluminium sulfate or calcium chloride additions above 0.5% of total formulation can produce coagulation. Published data for the exact coagulation threshold in Resyn 7480 is limited, and jar trials are required before production use.
Cleanup before drying is accomplished with warm water or mild alkaline detergent. Once the film has dried and fully coalesced, removal requires mechanical action or a suitable solvent blend, because the crosslinked surface skin of the dried film resists simple water rewetting. Equipment left idle for more than 30 min should be flushed with water to prevent nozzle blockages and edge-skin accumulation in transfer troughs.
