| HS Code | 990712 |
| Property 1 | Chemical composition: Vinyl acetate ethylene (VAE) copolymer emulsion |
| Property 2 | Physical form: White liquid aqueous emulsion |
| Property 3 | Total solids content: Approximately 55% by weight |
| Property 4 | Viscosity: Approximately 1500–2500 cP at 25°C |
| Property 5 | pH: 4.5–5.5 |
| Property 6 | Density: Approximately 1.06 g/cm³ at 25°C |
| Property 7 | Glass transition temperature: Around 0°C |
| Property 8 | Minimum film forming temperature: Approximately 0–5°C |
| Property 9 | Film characteristics: Flexible and clear, with good adhesion to paper, wood, and many plastics |
| Property 10 | Stability: Good mechanical and storage stability, with improved freeze-thaw resistance compared to ordinary PVAc homopolymers |
As an accredited Resyn 2150 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Resyn 2150 is packaged as free-flowing white granules in 25 kg net multi-ply paper bags for safe handling. |
| Container Loading (20′ FCL) | Resyn 2150 is loaded into a 20′ FCL, securely braced, ventilated, and labeled for safe chemical transport. |
| Shipping | Resyn 2150 is a polyvinyl acetate resin supplied as a dry powder. It is non-hazardous and non-regulated for transport. Ship in sealed, moisture-proof packaging within clean, dry containers. Protect from humidity, direct moisture, and excessive heat. No special hazardous shipping documentation is required; standard dry cargo handling and labeling apply. |
| Storage | Store Resyn 2150 in a cool, dry area away from direct sunlight and heat sources. Keep containers tightly sealed to prevent contamination or skinning. Protect from freezing, as low temperatures can irreversibly damage the emulsion; ideal storage is 40–90°F (4–32°C). Use within a reasonable shelf life, stirring gently before use if needed. |
| Shelf Life | Shelf life for Resyn 2150 is typically one year from manufacture when stored unopened in original containers under recommended conditions. |
In EN 204/205 classification work for non-structural wood assembly, Resyn 2150 is evaluated as a polyvinyl acetate homopolymer dispersion with nominal solids content 55±1%, Brookfield viscosity 2,500–4,000 mPa·s at 25°C, and pH 4.0–5.0. The dispersion is compounded in a stainless-steel vessel fitted with a low-shear anchor agitator operating at 60–90 min⁻¹; plasticizer addition is staged over 15–20 min and the jacket is held below 40°C to prevent localised coagulation. A D2 interior assembly formulation comprises 100 phr Resyn 2150, 6–8 phr triacetin or dibenzoate plasticizer, 0.2–0.5 phr mineral-oil defoamer, and 2–5 phr deionised water, yielding a final Brookfield viscosity of 8,000–14,000 mPa·s at 25°C. For D3 non-structural water-resistant bonds, aluminium chloride hexahydrate at 1.0–1.5 phr is added as a 28–30% aqueous solution during the last 30 min before application; the catalyzed mix exhibits a pot life of 3–4 h and must be protected from temperatures above 35°C. Open assembly time is maintained at 8–15 min at 20°C/65% RH; hard maple strips are spread with 120–180 g/m² wet adhesive by rubber roller, then cold-pressed at 0.7–1.2 MPa for 15–25 min. ASTM D905 dry shear targets on hard maple are typically ≥12 MPa; EN 204 D3 soak exposure targets residual shear above 3.0 MPa and no substrate delamination. The dispersion is not suitable for D4 exterior or boiling-water exposure. Addition of high-surface-area calcium carbonate above 5 phr or zinc oxide at any level shifts the weak-acid buffer system and shortens catalyzed pot life below 90 min. Terminal components include edge-glued furniture boards, finger-jointed poplar stiles, door frames, and laminated school furniture.
| Parameter | D2 interior assembly | D3 water-resistant assembly |
|---|---|---|
| Resyn 2150 | 100 phr | 100 phr |
| Plasticizer | 6–8 phr | 4–6 phr |
| Defoamer | 0.2–0.5 phr | 0.2–0.5 phr |
| Deionised water | 2–5 phr | 1–3 phr |
| Aluminium chloride crosslinker | Not added | 1.0–1.5 phr |
| Final Brookfield viscosity at 25°C | 8,000–14,000 mPa·s | 7,000–12,000 mPa·s |
| Pot life | >8 h | 3–4 h |
| Press time at 0.7–1.2 MPa | 15–25 min | 20–30 min |
| Classification reference | EN 204:2016 D2 / EN 205:2016 | EN 204:2016 D3 / EN 205:2016 |
On high-speed folder gluers running 200–400 m/min, the limiting variable is instantaneous wet tack on clay-coated SBS board of 250–350 g/m², not final dry bond. Resyn 2150 is reduced inline with 3–6 wt% water to a Brookfield viscosity of 1,200–2,500 mPa·s at 25°C, and 0.05–0.15 wt% of a mineral-oil defoamer is metered into the transfer reservoir. The adhesive bead is extruded through a slot nozzle with a gap of 0.3–0.6 mm; compression belts are set to 0.2–0.4 N/mm² over a 300–500 mm compression zone. On high-gloss clay coatings, open time is usually below 2 s; pre-moistening with 0.3–0.5 g/m² water mist extends open tack to 4–6 s without re-wetting the board liner. Wet tack is monitored by machine-camera detection of flap spring-back; reject rates above 0.3% typically indicate insufficient viscosity retention in the reservoir due to evaporative loss above 30°C. This adhesive is applied at 4–8 g/m² dry coat weight. Terminal items include cereal cartons, detergent multipacks, panelled sleeves, and frozen food cartons. Indirect food-contact use is supported by FDA 21 CFR 175.105 expectations and EU Regulation (EC) 1935/2004 migration limits for packaging adhesives; the formulator must verify residual monomer and plasticizer compliance under REACH Annex XVII restrictions. Avoid combination with amine-based pH neutralizers because the dispersion buffer is acid-stabilized and alkaline shock above pH 6.5 raises viscosity and can gel the reservoir.
Bookbinding lines operating above 8,000 cycles/h require a side glue with a viscosity low enough for transfer rollers but high enough to prevent spine penetration through lightweight paper. In perfect-binding, Resyn 2150 is plasticized with 10–15 phr dibenzoate and diluted with water to 2,000–3,500 mPa·s at 25°C; the adhesive is applied at 0.8–1.2 g/linear m to the prepared spine after roughening and waste removal. The cover nipping station is operated at 0.3–0.6 MPa for 3–6 s, and trims are discharged after 15–20 min of edge cooling. Page pull on coated text paper conditioned at 23°C/50% RH according to ISO 187 for 24 h typically reaches 6–9 N/cm before paper fibre tear predominates; lower values are seen on high filler sheets above 18% ash. Terminal outputs include trade softcover books, catalogues, annual reports, and bound training manuals. This dispersion is not intended as a hot-melt replacement; spine temperatures below −10°C show reduced flexibility unless the formulated compound is specifically evaluated for cold-flex cycling. Avoid unplasticized use on textile-reinforced spines because the homopolymer's higher glass transition produces cracking at the hinge fold.
For slasher sizing of ring-spun cotton and polyester/cotton blends, Resyn 2150 is blended with oxidized starch or PVA size at 20–40% of total size solids. The size bath is maintained at 50–60°C, and squeeze nip pressure is set between 60 and 100 N/mm to achieve size add-on of 8–12% owf on the warp. A size-box viscosity of 40–80 mPa·s at 50°C prevents excessive penetration into the yarn core and reduces fibre laydown at the reed. Shedding is measured gravimetrically over 10,000 loom cycles; values below 0.4 g/kg warp are targeted, although published data for this specific dispersion/starch blend is limited. Drying cylinders are profiled from 80°C to 110°C to remove water without skinning the size film. Terminal woven goods include printed apparel denim, pocketing, and workwear sheeting. The dispersion's acid pH requires stainless-steel size boxes; prolonged contact with carbon steel can introduce iron contamination and lower size liquor stability.
Spiral tube winding at line speeds of 50–150 m/min uses Resyn 2150 as the ply-to-ply adhesive because of its high initial grab onto kraft and recycled linerboard. The adhesive is prepared with 100 parts Resyn 2150, 2–5 parts water, and 0.1–0.3 parts defoamer; a grooved metering roll applies 18–25 g/m² dry coat weight to the top surface of each ply before the winding mandrel. Mandrel temperature is kept below 45°C to prevent premature film formation on the roll applicator. In-line tube testing includes radial crush resistance measured after 24 h conditioning at 23°C/50% RH; converting cores typically exceed 800 N/100 mm radial crush for 5 mm wall thickness, though final values depend on paper grade and ply count. Terminal products include film rewind cores, tape cores, paper mill cores, and industrial spools. This application does not require water resistance; if water contact is expected, the formulation must be re-evaluated with a crosslinking system similar to D3 wood class.
Coated abrasive base coats require controlled rheology and mineral adhesion to C-weight paper or vulcanized fibre backing. Resyn 2150 is diluted to 35–45% solids, mixed with calcium carbonate filler at 10–20 phr, and applied by knife-over-roll at 15–30 g/m² dry before electrostatic deposition of fused aluminium oxide. Mineral grit of FEPA P80–P120 is deposited onto the wet base coat; electrostatic field voltage is set between 20 and 40 kV and grain coverage is checked by weight differential. The web passes through a festoon dryer profiled at 80–115°C for 3–6 min; residual moisture below 1.5% is verified by loss-on-drying at 105°C. A resin-over-resin size coat may be required for disc and belt products, and published data for this specific configuration is limited. Terminal products include sanding sheets, hand pads, and low-pressure grinding belts for wood and painted surfaces.
| Property | Test reference | Measurement condition |
|---|---|---|
| Non-volatile content | ISO 3251:2019 | 150°C, 30 min, forced-air oven |
| Brookfield viscosity | ISO 2555:2018 | RVT, spindle 6, 20 rpm, 25°C |
| pH | ISO 976:2013 | Direct electrode, 25°C |
| Minimum film formation temperature | ISO 2115:2001 | Temperature-gradient bar, after 24 h |
At substrate temperatures below 12°C, PVAc homopolymer dispersions with a glass transition near 33°C can exhibit particle boundary cracking unless plasticizer partitioning is correct. Resyn 2150 is evaluated at 5–10°C for cold-weather paper lamination using a dibenzoate plasticizer at 8–10 phr; the minimum film formation temperature measured per ISO 2115 drops below 5°C after 24 h equilibration. Application is performed with a wire-wound rod at 6–10 g/m² dry on corona-treated polyethylene-free papers. Laminates are nipped at 0.2 MPa and conditioned at 5°C/50% RH; delamination is evaluated by manual T-peel at 90°; fibre tear above 80% of bonded area is the pass criterion. Terminal items include cold-store labels, logistics tags, and point-of-sale signage for refrigerated display. Formulators must avoid dibutyl phthalate as a plasticizer due to restrictions under REACH Annex XVII Entry 51 and should document plasticizer selection against EU Directive 2011/65/EU for electrical displays where applicable.
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Resyn 2150 is a low-molecular-weight vinyl acetate homopolymer resin supplied in colourless bead form for solventborne adhesive, coating, and printing-ink formulations. The numerical designation classifies the grade within the manufacturer’s resin ladder by solution viscosity in ethyl acetate and molecular weight distribution. Typical lot-release data list a weight-average molecular weight of 35,000–45,000 g/mol by size-exclusion chromatography, a glass transition temperature of 30–34°C by differential scanning calorimetry at 10 K/min in accordance with ASTM D3418, and an acid number below 4.0 mg KOH/g. Residual moisture is controlled below 0.5 wt% because adsorbed water accelerates hydrolysis of acetate groups during solvent stripping and shifts solution viscosity during storage. The resin is used primarily as a cohesive strength modifier in laminating adhesives, heat-seal coatings, and remoistenable paper coatings, where rapid solvent release and controlled tack development are required.
The primary process-relevant difference is solution viscosity at equal nonvolatile content. A higher-molecular-weight vinyl acetate homopolymer with an Mw above 100,000 g/mol typically produces a 30 wt% solution in ethyl acetate with a Brookfield viscosity above 200 mPa·s. Resyn 2150, by contrast, remains below 90 mPa·s under identical conditions. This allows formulation of low-odour gravure and flexographic inks at solids contents of 35–40 wt% without exceeding press-side viscosity limits. A second difference is mechanical peel behaviour in flexible packaging laminations. Low-molecular-weight grades such as Resyn 2150 form adhesive layers with lower cohesive strength but more rapid wetting of corona-treated polyethylene and aluminium foil. In a comparative T-peel test using ASTM D1876 on 12 µm polyethylene terephthalate laminated to 25 µm aluminium foil, formulations containing Resyn 2150 at 20 wt% solids in methyl ethyl ketone/toluene 70:30 w/w develop a 24-hour peel strength of 1.8–2.4 N/mm, while a high-molecular-weight grade typically reaches 3.5–4.2 N/mm but requires longer open time and higher drying-energy input. Selection between the two is therefore governed by whether bond strength or coating speed is the limiting parameter on the laminating line.
| Property | Test method | Typical value |
|---|---|---|
| Weight-average molecular weight | ISO 16014-2 | 35,000–45,000 g/mol |
| Glass transition temperature | ASTM D3418 | 30–34°C |
| Acid number | ISO 2114 | 4.0 mg KOH/g max |
| Softening point | ASTM E28 | 110–125°C |
| Solution viscosity, 30 wt% in ethyl acetate | ISO 2555, Brookfield LVT, spindle 2, 30 rpm, 25°C | 50–90 mPa·s |
| Residual vinyl acetate monomer | Headspace GC, ASTM D4526 | 5 ppm max |
| Moisture | ISO 760 | 0.5 wt% max |
The solvent phase is typically prepared in a 500 L jacketed dissolver fitted with an anchor agitator and a high-speed disperser. Dissolution of Resyn 2150 in ethyl acetate or methyl ethyl ketone is charge-rate limited by bead wetting; bead agglomeration occurs when additions exceed 10 kg/min at solvent temperatures below 20°C. The recommended sequence adds the resin to the vortex at 600–800 rpm with solvent at 30–35°C, then increases disperser tip speed to 18–22 m/s for 30–45 min to eliminate microgel particles. Solution haze after filtration should remain below 10 NTU at 25°C for high-clarity overprint varnishes. Solvent release from a 12 µm wet film in a pilot-scale forced-air oven at 80°C with air velocity 3 m/s is 95% complete within 45 s; residual solvent above 200 ppm in a 2 m wide production coater is associated with blocking in roll rewind stations.
Thermal degradation of vinyl acetate homopolymers proceeds primarily by side-group elimination to acetic acid and polyene sequences. In a thermogravimetric study conducted at 10 K/min under nitrogen, Resyn 2150 shows 1% mass loss at 185–195°C and 5% mass loss at 230–245°C. Isothermal thermogravimetric analysis at 160°C for 60 min records an acetic acid evolution rate of 0.8–1.5 µg·g⁻¹·min⁻¹ by coupled mass spectroscopy. These values define a narrow melt-processing window for hot-melt adhesive compounding: screw temperature should be maintained at 150 ± 5°C in a corotating twin-screw extruder with an L/D ratio of 40:1. Barrel zones above 155°C generate free acetic acid that corrodes downstream aluminium vacuum calibrators and increases tackifier acid number by as much as 4 mg KOH/g after a 2 h residence time at 165°C. Below 145°C, melt viscosity exceeds 500 Pa·s at a shear rate of 10 s⁻¹, causing torque excursions above 85% of motor rating on a 75 kW drive. The practical production control on a 500 kg/h line holds the setpoint within ±2°C to avoid lot-to-lot viscosity drift.
During solution storage, Resyn 2150 has a shelf life of 12 months at 25°C and 0–60% RH in sealed original packaging. Storage above 35°C or at relative humidity above 60% increases acid number at an observed rate of 0.2 mg KOH/g per month because adsorbed water hydrolyzes acetate groups. The resin should not be combined with amine-based adhesion promoters in the same solvent phase; primary amines catalyze ester cleavage and produce acetamide residues, which plasticize the adhesive film and reduce T-peel strength by 30–40% within 72 h of mixing. Low-alcohol solvents such as ethanol or n-propanol above 15 wt% of the solvent blend are not recommended for gravure inks because the alcohol swells the bead surface during storage and increases solution filtration pressure drop by 0.5–1.0 bar across a 5 µm absolute filter.
In flexible packaging, Resyn 2150 is incorporated into solventborne laminating adhesives for structures that fall under 21 CFR 175.105 as indirect food-contact adhesives, provided the adhesive is separated from food by a functional barrier or the migration of the adhesive into food does not exceed applicable specific migration limits. The resin itself is manufactured with residual vinyl acetate monomer below 5 ppm; the supplier’s batch release method uses headspace gas chromatography with flame ionization detection and is qualified for a reporting limit of 1 ppm. Formulators must confirm final adhesive compliance under the appropriate Conditions of Use because 21 CFR 175.105 does not list Resyn 2150 by name but permits the resin as a component of an adhesive that meets the general safety requirement. The product has a documented inventory status under TSCA and is manufactured under REACH with no Substance of Very High Concern constituents above 0.1% w/w. No animal-derived processing aids or phthalate plasticizers are used in the manufacture of this grade.
| Regulatory framework | Designation | Acceptance criterion |
|---|---|---|
| United States food-contact adhesives | 21 CFR 175.105 | Formulated adhesive must comply with general safety and migration provisions |
| European Union chemicals regulation | REACH 1907/2006/EC | SVHC content below 0.1% w/w per Article 33 |
| Restriction of hazardous substances | RoHS 2011/65/EU | Pb, Hg, Cd, and Cr(VI) below threshold by IEC 62321 |
| United States inventory status | TSCA | Listed as polyvinyl acetate homopolymer |
| Heavy metals in packaging | TPCH model legislation | Sum of Pb, Cd, Hg, and Cr(VI) below 100 ppm |
Resyn 2150 is not recommended for exterior-grade structural bonding or load-bearing applications because the polyvinyl acetate backbone is hydrolytically sensitive under sustained alkaline moisture. In an 85°C/85% RH aging study on aluminium lap-shear specimens prepared per ISO 4587, shear strength declined by 45% after 1,000 h, whereas a two-component polyurethane control retained 80% of initial strength. The resin also exhibits solvent-induced crystallization when exposed to high-methylcyclohexane blends; solution cloud point at 10 wt% solids in methylcyclohexane is 12°C, which limits cold-weather shipment of ready-made inks. No additional plasticizer is required for film formation above 5°C; below that temperature, cast films thicker than 50 µm show cracking at 180° mandrel bend under ISO 1519.
