| HS Code | 125102 |
| Product Name | ROVACE 662 |
| Product Type | Vinyl acrylic copolymer emulsion |
| Chemical Family | Vinyl acetate-acrylic copolymer |
| Physical State | Liquid |
| Appearance | White viscous milky liquid |
| Ph | 5.0 - 6.0 |
| Solids Content | 55 ± 1% |
| Viscosity | 1000 - 2000 mPa·s |
| Density | 1.05 - 1.10 g/cm³ |
| Particle Size | 0.1 - 0.3 microns |
| Glass Transition Temperature | Approximately 15 °C |
| Minimum Film Forming Temperature | Approximately 10 °C |
| Storage Temperature | 5 °C to 40 °C |
| Application | Architectural coatings, paints, primers, and adhesives |
| Product Name | ROVACE 662 |
| Manufacturer | Rohm and Haas Company / The Dow Chemical Company |
| Product Type | Vinyl acrylic copolymer emulsion |
| Chemical Family | Polyvinyl acetate (PVAc) copolymer |
| Physical State | Liquid |
| Appearance | White milky emulsion |
| Odor | Mild acrylic odor |
| Solids Content | 55% by weight |
| Viscosity | 1500–2500 cP at 25°C |
| Ph | 6.0–8.0 |
| Specific Gravity | 1.04–1.08 |
| Glass Transition Temperature | Approximately 5°C |
| Minimum Film Forming Temperature | Approximately 0°C |
| Water Solubility | Dispersible in water; forms a film upon drying |
| Shelf Life | 12 months from date of manufacture under recommended storage |
| Storage Temperature | 5–50°C; protect from freezing |
| Applications | Paints, coatings, packaging adhesives, paper and textile binders |
As an accredited ROVACE 662 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | ROVACE 662 is packaged in 55-gallon drums, containing 200 kilograms net, with batch number and safety labeling. |
| Container Loading (20′ FCL) | 20′ FCL container loading for ROVACE 662 ensures safe, secure packing, proper labeling, and compliance for chemical transport. |
| Shipping | ROVACE 662 is typically shipped as a non-hazardous vinyl acetate-acrylic copolymer emulsion, not regulated as dangerous goods for road, rail, sea, or air transport. Pack in sealed drums or IBCs, protect from freezing and excessive heat, and document as non-DG under ADR, IMDG, and IATA regulations. |
| Storage | Store ROVACE 662 in its original, tightly sealed container in a cool, dry, well-ventilated area away from direct sunlight, heat, and ignition sources. Keep separate from incompatible substances, food, and animal feed. Ensure the storage area is secured and inaccessible to unauthorized personnel and children. Always follow the product label and Safety Data Sheet (SDS) for specific requirements. |
| Shelf Life | Shelf life is 12 months from manufacture when stored in original unopened containers, protected from freezing and direct sunlight. |
In PVC membrane and flat-panel lamination, the adhesive is applied to the back of decorative vinyl film or to the MDF profile. ROVACE 662 is compounded as the principal binder at 70–85 wt% of the wet adhesive; the remaining formulation consists of defoamer at 0.1–0.3 wt%, rheological thickener at 0.2–0.5 wt%, and water. When heat-activation presses are used, the dried adhesive film is reactivated at 80–110°C under membrane vacuum or platen pressure ranging from 0.3 MPa to 0.8 MPa. Roll-coater gap settings are adjusted to a dry adhesive deposition of 20–40 g/m²; lower deposition produces telegraphing on smooth MDF surfaces, and higher deposition increases drying time beyond 20 minutes at 25°C. When membrane pressing three-dimensional profiles, adhesive bridging in sharp grooves occurs if dry film thickness exceeds 25 µm, and vacuum hold time below 60 s may leave edge lift. Terminal articles include vinyl-wrapped MDF doors, RTA furniture drawer fronts, desktops, interior wall panels, and profile-wrapped picture frames. Compliance for furniture panel surfaces is commonly assessed under ASTM D4541 for pull-off adhesion and ASTM D903 for peel resistance; REACH Regulation (EC) No 1907/2006 Annex XVII applies to migration of restricted substances from the bonded article. Operational limitations include plasticizer migration from low-cost PVC films into unmodified VAE adhesive layers at service temperatures above 60°C, which can cause time-dependent peel loss; published data for this specific configuration is limited and must be validated on the production film. Avoid introducing multivalent metal salts or cationic wetting agents into the compounded adhesive because charge neutralization destabilizes the emulsion.
High-speed rotary labeling lines transfer ROVACE 662-based adhesives by engraved roller to paper label stock or directly to HDPE and PET bottle surfaces. The addition ratio in the compounded adhesive is typically 60–75 wt% of the wet formulation, with polyvinyl alcohol solution at 10–20 wt% for wet tack extension and defoamer at 0.05–0.2 wt%. The production process is rotary or inline label application at line speeds typical of modern rotary labelers, with compression rollers following the transfer point. The application system consists of a chromium oxide ceramic anilox roller, doctor blade, and rubber impression roller; roller pressures are typically set to 0.2–0.4 MPa to prevent adhesive sling. Foaming is controlled by defoamer addition and by maintaining adhesive pot temperature at 18–25°C; viscosity drift above 3000 mPa·s can cause uneven transfer. Terminal finished products include labeled HDPE detergent bottles, PET beverage containers, and paper-applied shrink sleeves. The governing compliance framework for non-food labels is REACH; where food-contact labeling is involved, FDA 21 CFR 175.105 or EU Regulation (EC) No 1935/2004 applies. Operational boundaries appear when relative humidity exceeds 70%; wet tack development slows on high-slip bottle surfaces, and transfer efficiency can fall below acceptable limits if roller engraving depth is less than 30 µm.
When flap closure is required within 30 seconds of adhesive transfer, carton sealing stations on folder-gluer lines run with circulating adhesive pots and wheel applicators. In this sector ROVACE 662 functions as the main binder at 65–80 wt% of the wet adhesive, supplemented with polyvinyl alcohol at 5–15 wt% for cohesive strength, defoamer at 0.05–0.2 wt%, and water. Production lines use stinger, wheel, or nozzle extrusion application with open times between 5 s and 30 s; compression sections apply contact pressure below 0.1 MPa for 0.5–2 s. Bond strength is normally tested under ASTM D1876 T-peel geometry after 24 h conditioned at 23°C and 50% RH. Finished articles include corrugated shipping cases, folding cartons, tray-formed packaging, and multiwall paper sacks. Compliance is established under FDA 21 CFR 175.105 for incidental food-contact adhesive use, with paper and paperboard components referenced under 21 CFR 176.170 and 21 CFR 176.180 where fatty or dry food contact is possible. The adhesive is not suitable for direct food contact and is not formulated for boil-in-bag or retort conditions; use above 60°C service temperature is outside the documented operating envelope.
Softcover perfect binding and layflat book production require low-odor waterborne spine glues when reactive polyurethane hot melts are not specified. ROVACE 662 is introduced as the backbone polymer at 50–70 wt% of the wet adhesive, with polyvinyl alcohol solution at 15–30 wt%, filler dispersion at 5–15 wt%, and preservative at 0.1–0.3 wt%. The production process is inline perfect binding: the adhesive is applied to the routed spine, the cover is nipped, and the book enters a cooling and drying section before stacking. Spine adhesive viscosity is maintained between 2000 and 5000 mPa·s at application temperature; low viscosity causes strike-through into uncoated paper, and high viscosity prevents adhesive from penetrating the spine cuts. Drying is completed in a radio-frequency or air-knife section before in-line trimming. Terminal finished products include softcover trade books, catalogs, annual reports, and layflat notebooks. Relevant standards include ANSI/NISO Z39.48-1992 when paper permanence is specified and ASTM D903 for adhesive peel characterization; REACH registration for the formulated adhesive remains mandatory. The principal processing limitation is cold-condition flexibility: adhesive films containing insufficient ethylene content can crack at spine temperatures below 5°C, and low-temperature mechanical validation should be performed under ISO 6721-1 rather than extrapolating from room-temperature data.
Where open-cell polyurethane foam is bonded to woven or knitted textile face stock, waterborne VAE adhesives replace solventborne polychloroprene in markets where VOC content is restricted. ROVACE 662 is compounded as the primary binder at 60–80 wt% of the wet adhesive; rheological modifier at 0.2–0.5 wt%, defoamer at 0.05–0.2 wt%, and water constitute the balance. The production process is roll coating or air-assisted spray onto the foam sheet, passing through a forced-air tunnel at 80–110°C until the film is tacky, then immediate lamination with fabric under nip pressure of 0.3–0.6 MPa. Spray systems use air-atomizing guns with atomization air pressure between 0.4 and 0.7 MPa; roll systems use engraved rolls with cell volume 20–40 cm³/m². The open time after drying and before fabric lamination is controlled to 10–30 s to prevent loss of hot-tack. Terminal finished products include automotive seat covers, office chair upholstery, mattress ticking, and padded wall panels. Compliance for automotive interior components includes FMVSS 302 flammability testing on the finished laminate and REACH Regulation (EC) No 1907/2006 Annex XVII for restricted substances; furniture upholstery sold in Europe may require testing under EN 1021-1 and EN 1021-2 for cigarette and match ignition. Adhesion is evaluated under ASTM D751 for coated fabrics or ASTM D903 for flexible laminate peel. The operational boundary appears with polyester face fabrics containing fluorocarbon finishes; surface energy below 35 mN/m can require corona pre-treatment to achieve adequate bond strength. Foam substrates with ester-grade polyurethane are more prone to hydrolysis than ether-grade, so wet lamination before drying is not recommended. Do not combine with cationic antistatic agents that can coagulate the emulsion.
Third-party audits of food-contact packaging adhesives require the converting plant to demonstrate that the adhesive formulation falls within the clearance described in FDA 21 CFR 175.105 for adhesives used in packaging, transporting, or holding food, provided that the adhesive is separated from food by a functional barrier. ROVACE 662 is incorporated at 55–75 wt% of the wet adhesive in cupstock and carton side-seam formulations; the remaining fraction consists of polyvinyl alcohol, defoamer, and water, with no plasticizer addition. The production process is roll coating of cupstock blanks followed by heat sealing of the side seam at 130–170°C; finished terminal products include paper cups, paperboard sleeves, and food cartons. Side-seam bond strength is tested on the finished cup according to ASTM D903 after hot-water filling at 80°C for 30 minutes; failure modes are documented as fiber tear, adhesive cohesive failure, or interfacial release. For cups used with hot liquids, the adhesive bond line must not fail below 90°C. EU Regulation (EC) No 1935/2004 and EU Regulation (EU) No 10/2011 apply to European converters, with migration testing under the EN 1186 series where the adhesive is not separated by an absolute barrier. The formulation should not be used in direct food contact, and migration test results for low-molecular-weight residuals must be established on the final converted article because the adhesive film itself is not a food-contact material.
| Application scenario | Standard or regulation | Designation / clause | Assessment endpoint |
|---|---|---|---|
| PVC film lamination to MDF | REACH | Regulation (EC) No 1907/2006 Annex XVII | Restricted substances in final article |
| Rotary bottle labeling | FDA | 21 CFR 175.105 | Incidental food-contact suitability |
| Carton sealing | FDA | 21 CFR 176.170 / 176.180 | Paper and paperboard food-contact components |
| Bookbinding | ANSI/NISO | Z39.48-1992 | Paper permanence and adhesive compatibility |
| Foam lamination | FMVSS / EN | FMVSS 302; EN 1021-1; EN 1021-2 | Flammability of upholstered furniture and automotive interiors |
| Cupstock side-seam | FDA / EU | 21 CFR 175.105; EN 1186 series | Migration from final food-contact article |
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ROVACE 662 is supplied as an aqueous polymer dispersion based on a polyvinyl acetate polymer backbone. The grade is used primarily in waterborne adhesive compounding and cellulosic converting operations where fast wet tack, controlled open time, and mechanical stability under shear are critical process variables. The manufacturer’s batch certificate of analysis controls non-volatile content, pH, low-shear viscosity, grit residue, and minimum film-formation temperature; these values are lot-specific and should not be replaced by generic class data during production qualification. The product can be formulated with selected waterborne tackifiers, plasticizers, and rheology modifiers, but the sequence of addition and the final pH require control to avoid destabilization. The product is classified as an industrial polymer dispersion. Regional exposure-limit, REACH, and food-contact compliance documentation should be requested for the intended downstream use. Residual volatiles, including vinyl acetate monomer, are normally quantified by headspace gas chromatography using an internal calibration procedure, and the release limit is stated in the supplier’s specification.
The structural difference between ROVACE 662 and vinyl acetate-ethylene copolymer dispersions is the reduced incorporation of a low-glass-transition ethylene segment along the polymer chain. In processing terms that change shifts the glass transition region to a higher temperature, increases the yield stress of the dried film, and reduces low-temperature flexibility in the bonded joint. The practical result is improved static-load resistance in rigid assembly and reduced tack on low-energy polymer films at low temperature. Published quantitative data for this specific configuration are limited, so qualification should include differential scanning calorimetry under nitrogen at a heating rate of 10 K/min in accordance with ISO 11357-2. For plasticizer-free formulations, creep resistance can be evaluated by static shear at 60 °C with a 1 kg dead load. Failure modes should be classified as cohesive, adhesive, or substrate failure according to ASTM D5573. Compared with externally plasticized polyvinyl acetate homopolymers, formulations based on ROVACE 662 do not require dibutyl phthalate or benzyl butyl phthalate, thereby reducing long-term plasticizer migration and surface contamination.
On a high-speed case erector equipped with a 0.4 mm nozzle and an air-over-pneumatic piston pump, adhesive bead consistency depends on the ratio between low-shear viscosity and high-shear viscosity. The material is discharged at a nominal pressure of 1.5 MPa to 4.0 MPa depending on line speed, nozzle wear, and fluid temperature. At line speeds above 250 m/min, insufficient viscosity recovery after the pump stroke produces intermittent bead thinning and starved flaps. Incoming lot checks therefore include a two-point rheological ratio measured at 1 s⁻¹ and 100 s⁻¹ on a concentric-cylinder rheometer following ISO 3219. A batch-to-batch variation exceeding 15% in the low-shear value can be a rejection criterion when the material is transferred through long feed lines because air release and shear history in diaphragm pumps alter dispersion stability. Filtration through a 150 µm bag filter before the applicator removes coagulum that otherwise accumulates behind the nozzle. On roll coaters, the fluid is applied at 20 µm to 40 µm wet film thickness; controlling solids against the certificate of analysis is essential for consistent dry adhesive coat weight.
Open-time testing is conducted at 23 °C and 50% relative humidity unless the application specification defines otherwise. At higher humidity, water removal from the adhesive film is retarded, and the onset of fiber-tearing adhesion can lag behind the production cycle. On corrugated board with a Cobb value above 35 g/m², the substrate absorbs water rapidly; when the board is too dry, the adhesive may skin before compression, causing loss of contact. The operational boundary is not only the glass transition temperature of the polymer but also the moisture sorption isotherm of the substrate and the wet-film thickness. A practical control is to reduce applied wet film thickness or increase compression dwell time rather than to alter polymer solids. If relative humidity exceeds 60%, unsealed paper substrates should be pre-conditioned or the line speed reduced. The product’s water-resistance limitations emerge after drying; hot-water immersion testing at 60 °C using EN 204 can distinguish water-redispersible films from crosslinked films.
| Property | Test method | Equipment/conditions | Processing implication |
|---|---|---|---|
| Non-volatile content | ISO 3251 | Forced-air oven, 105 °C to constant mass | Determines dry film thickness at a given wet coat weight |
| Brookfield viscosity | ISO 3219 | Spindle No. 4, 20 rpm, 25 °C | Controls transfer pumps, roller transfer, and bead width |
| pH | ISO 976 | pH meter with temperature compensation | Affects colloidal stability and thickener response |
| Sieve residue | ISO 4576 | 150 µm sieve | Indicates coagulum and nozzle-fouling tendency |
| T-peel adhesion | ASTM D1876 | 300 mm/min, 23 °C, 50% RH | Classifies substrate fiber-tearing versus adhesive failure |
| Lap shear | ASTM D1002 | 1.3 mm/min, conditioned specimens | Provides comparative shear strength for rigid substrates |
High-speed lamination of polyethylene terephthalate or biaxially oriented polypropylene to paper with waterborne dispersions is controlled by surface energy. The polymer film is typically corona treated to a dyne level of 38 mN/m to 42 mN/m; below this range, waterborne wetting is incomplete and the dried film retracts. ROVACE 662-based formulations are generally less capable of wetting untreated low-energy films than solventborne polyurethane or acrylic pressure-sensitive adhesives. When the application demands adhesion to untreated polypropylene, priming or adhesion promoters are required. The difference from acrylic dispersions is that polyvinyl acetate-based films tend to be more hydrophilic; after a single water immersion cycle, adhesion loss may be partly recoverable by drying, but hot-water resistance requires crosslinking. Contact-angle hysteresis measured with water before and after corona treatment should be recorded. If the film’s surface oxygen content falls below 8 at% by X-ray photoelectron spectroscopy, cohesive failure tends to shift to adhesive failure at the interface.
Storage in unlined carbon-steel vessels is not recommended because low pH can generate iron ions that discolor the dried film and destabilize the dispersion. The material should be stored at 5 °C to 35 °C, protected from freezing. Freeze-thaw damage is detected as an increase in 45 µm sieve residue. Direct pH adjustment with strong alkali is not advised because localized pH excursions above 7.5 can saponify acetate groups and increase viscosity irreversibly. If pH adjustment is required, dilute ammonia or sodium bicarbonate solution should be added slowly under continuous agitation while monitoring pH. Avoid combination with amine-based additives unless prior stability screening is conducted, because some amines raise the continuous-phase pH and accelerate hydrolysis. Multivalent cations such as aluminum sulfate or calcium chloride can coagulate the dispersion; compatibility tests should be performed using a 100 g jar sample before production batching.
Compared with polyvinyl acetate homopolymers plasticized externally with dibutyl phthalate or benzyl butyl phthalate, ROVACE 662 is designed to avoid long-term monomeric plasticizer migration. Compared with vinyl acetate-ethylene dispersions, the higher polyvinyl acetate character reduces low-temperature tack but improves heat resistance and static load resistance. Compared with solventborne polyurethane systems, the aqueous delivery reduces solvent emissions but imposes longer open times and lower cohesive strength unless crosslinkers are added. On a production-scale case sealer fitted with a 30:1 L/D piston pump and a 0.3 mm nozzle, bead width variation of ±0.5 mm was observed when low-shear viscosity differed by more than 20% between batches. That field data confirms the need for rheological incoming inspection and for closed-loop temperature control on the transfer vessel.
| Compliance area | Reference | Required evidence | Application boundary |
|---|---|---|---|
| Indirect food-contact adhesive | 21 CFR 175.105 | Supplier letter or formulation clearance | Applies to formulated adhesive, not necessarily neat dispersion |
| EU chemical inventory | REACH | Extended safety data sheet | Registration status must be confirmed for imported product |
| Restriction of hazardous substances | 2011/65/EU | Supplier declaration or test report | Applies to finished articles, not wet dispersion |
| VOC content | ASTM D3960, EPA Method 24 | Laboratory data | Low-VOC status depends on formulated additives |
| Heavy metals in consumer articles | ASTM F963 | Certified test laboratory report | Required only for toy or child-contact end uses |
| Dispersion mechanical stability | ISO 4576 | Sieve residue after specified shear history | Predicts nozzle and coater performance |
On a corrugated slitter-scorer line running E-flute board at 250 m/min, the adhesive’s green strength must be sufficient to maintain compression-bonded flaps without spring-back. The applied wet film is typically 25 µm to 35 µm thick, and compression dwell is limited to 0.5 s to 1.5 s. Under those conditions, the polymer’s rapid film formation and high wet tack are more important than final shear strength. Bonded samples pulled immediately after compression should show fiber-tearing failure on at least 80% of the bonded area. If fiber-tearing is not achieved, the adhesive may be drying too slowly, the substrate may be too saturated, or the wet film thickness may be too high. The correction is process-based first: reduce wet film thickness, increase substrate temperature, or raise compression dwell. Only after confirming that the processing window is centered should formulation adjustments be made.
