| HS Code | 593383 |
| Product Name | Resyn 1601 |
| Chemical Family | Vinyl acetate-ethylene copolymer |
| Physical Form | White aqueous emulsion |
| Carrier | Water |
| Solid Content | 55% |
| Viscosity | 2500 cps |
| Ph | 4.5 |
| Glass Transition Temperature | 5°C |
| Film Appearance | Clear and flexible |
| Typical Application | Adhesives and coatings |
As an accredited Resyn 1601 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Resyn 1601 is supplied in 25 kg multi-layer paper bags with a polyethylene liner for moisture protection. |
| Container Loading (20′ FCL) | Resyn 1601 is loaded as a 20′ FCL, with packaged chemical palletized, secured, and braced to prevent movement during transport. |
| Shipping | Resyn 1601 is a water-based vinyl acetate-ethylene copolymer emulsion shipped in lined drums, totes, or bulk tankers. Protect from freezing and excessive heat; ideal storage is 40–90°F. It is generally non-hazardous for transport, but keep containers sealed and upright. Refer to the Safety Data Sheet for full regulatory and handling requirements. |
| Storage | Store Resyn 1601 in its original, tightly sealed container in a cool, dry, well-ventilated area. Avoid direct sunlight, excessive heat, and freezing temperatures—ideally keep between 40°F and 90°F (4°C–32°C). Prevent contamination by using clean equipment. Under proper conditions, shelf life is approximately 12 months from manufacture. |
| Shelf Life | Resyn 1601 has a shelf life of 6 months when stored unopened in original containers at 60–80°F. |
Resyn 1601 is processed as a polyvinyl acetate homopolymer dispersion stabilized with a polyvinyl alcohol protective colloid. Incoming material should be checked for Brookfield RVT viscosity, solids, pH, and coagulum retention on a 45 μm sieve. Storage should be maintained between 5 °C and 35 °C in closed HDPE or stainless steel vessels to limit surface skinning and pH drift. Mechanical agitation before transfer should be limited to 50–100 rpm because polyvinyl alcohol-stabilized dispersions are sensitive to air entrainment under high shear. Defoamer addition of 0.1–0.3 wt% on total batch weight is typical before compounding; benzisothiazolinone at 50–150 ppm active content is used only after verifying regional regulatory status. Compounded pH should not exceed 8.0, since alkaline conditions accelerate ester hydrolysis and can destabilize the protective colloid. These receiving and handling practices apply to all downstream segments described below.
| Downstream segment | Governing standard | Test method or classification clause | Operational boundary |
|---|---|---|---|
| Wood adhesive | EN 204:2016 | EN 205:2016 shear strength, clause 4 classification | D1/D2 dry interior only |
| Paper lamination | FDA 21 CFR 175.105 | TAPPI T 494 om-88, ASTM D1876-08 | Indirect food contact only |
| Nonwoven saturant | ISO 9073-3:1989 | Tensile strength | Dry strength only |
| Architectural paint | ASTM D2805-11, ISO 11998:2006 | Hiding power, wet scrub resistance | Dry interior surfaces only |
| Cementitious bond coat | ASTM C1583-13 | Pull-off adhesion | Interior or covered exterior only |
| Tube winding | ASTM D903-98 | Peel adhesion | Outer ply moisture below 8 wt% |
Formulations for edge-glued panels and interior joinery normally contain 100 parts by weight of Resyn 1601, 2–5 parts by weight of a low-volatility plasticizer such as diethylene glycol dibenzoate, 0.2–0.5 parts by weight of a non-silicone defoamer, and 0.05–0.15 parts by weight of an in-can biocide. Mixing should use a low-shear anchor or planetary stirrer at 25–50 rpm; dispersion temperatures above 35 °C increase the risk of irreversible viscosity drift. The mixed adhesive is applied at 150–180 g/m² single-side spread to beech, oak, or birch substrates with moisture content between 8 % and 12 %. Cold pressing at 0.8–1.2 MPa for 15–30 minutes followed by 2–4 hours of clamp standing produces joints that can be machined after 24 hours; dry shear strength on beech panels typically falls in the 8–12 MPa range when tested according to EN 205:2016. That result supports non-structural classification only. The bond is not suitable for D3 or D4 wet service; after 24 h water storage, residual strength often drops below 2 MPa. Addition of 3–5 parts by weight of aluminum chloride solution improves water resistance but shortens pot life to less than 4 hours and increases the risk of dark staining on tannin-rich wood. Terminal components include interior furniture joints, door stiles, and laminated boards for dry service.
On high-speed paper lamination lines, Resyn 1601 is diluted with water to a Brookfield viscosity of 800–1,200 mPa·s and applied by engraved roller or doctor nip at 20–35 g/m² wet onto printed board, metallized film, or barrier paper. Open time is controlled between 10 s and 45 s depending on line speed, and pressing at 3–5 bar nip pressure with 60–80 °C heated rolls drives water removal. The adhesive qualifies under FDA 21 CFR 175.105 for indirect food contact only when the finished package complies with the corresponding extraction limits; no direct food-contact claim applies to this dispersion. Bonded structures should be evaluated for delamination resistance using TAPPI T 494 om-88 or ASTM D1876-08 at 23 °C and 50 % RH. Published data for this specific configuration is limited, so a production-scale trial must confirm acceptable peel strength at the maximum line speed. End products include laminated carton stock, litho-laminated corrugated board, and paperboard envelope assemblies.
Air-laid webs intended for packaging corner posts, shoe counters, and automotive interior trim blanks require a stiff, non-blocking binder with high wet tack and low foam. Resyn 1601 is metered into a pad-bath at 25–40 % solids and applied by kiss-roll or dip-nip saturation to a dry add-on of 18–30 wt% on fibre mass. Drying is performed on steam cans or flatbed ovens at 120–150 °C web surface temperature for 30–90 seconds, with final moisture below 3 wt%. The saturated web is then passed through a cooling section below 30 °C to prevent blocking on the winder. Tensile strength and elongation are measured according to ISO 9073-3:1989; bending stiffness can be tracked by two-point cantilever deflection but no single ISO method applies to all web constructions. The homopolymer contributes a glass transition temperature near 33 °C, which gives a crisp hand at room temperature but may soften in hot warehouse conditions above 40 °C. No crosslinker is needed for standard stiffening grades; if wet strength is required, the web is post-treated with a reactive melamine or glyoxal resin separate from the Resyn 1601 bath.
Where economy-grade interior ceiling and wall paints require high opacity at solids between 55 % and 65 %, Resyn 1601 functions as the main film-forming binder at pigment volume concentrations between 68 % and 78 %. The grind phase typically contains titanium dioxide, calcium carbonate, and talc dispersed with sodium polyacrylate at 0.3–0.8 wt% on pigment mass; the let-down combines the Resyn 1601 binder, hydroxyethyl cellulose at 0.4–1.0 wt% on total paint mass, defoamer, and a coalescent at 3–7 wt% on binder solids to reduce minimum film formation temperature below 10 °C. pH is adjusted with ammonia to 7.5–8.0 only after the binder has been fully incorporated, and stirring is held below 600 rpm to minimize foam. Hiding power is measured according to ASTM D2805-11, wet scrub resistance according to ISO 11998:2006. The cured film is water-sensitive and is not acceptable for bathroom ceilings, kitchens, or exterior exposure; these paints are limited to dry interior vertical surfaces.
Polymer solids dosage of 0.10–0.20 kg per kg of cement is combined with ordinary Portland cement, silica sand, and water to form a thin leveling or bonding slurry. The latex is first mixed into the gauging water at low speed, then cement is added under shear to break agglomerates; final slump is adjusted to suit trowel or brush application. The slurry is applied at 1–2 mm thickness to pre-wetted concrete or masonry surfaces. Wet curing is maintained for 48 hours, followed by 28 days of ambient cure before tensile adhesion testing. Bond strength under dry conditions is evaluated using ASTM C1583-13; polymer-modified cementitious systems often fall in the 1.0–2.0 MPa pull-off range on prepared concrete. Wet adhesion and freeze-thaw exposure reduce performance significantly because polyvinyl acetate is not hydrophobic. The material is therefore restricted to interior or covered exterior bonding of repair mortars and cementitious leveling layers; it is not suitable for structural anchorage or continuously damp environments.
In spiral tube winding and convolute carton sealing, the tack retention window and open time control the maximum line speed. Resyn 1601 is applied to paper plies at 25–40 g/m² wet from a roller coater and the winding mandrel is maintained at 60–90 °C to accelerate water removal. The adhesive must retain tack for 15–45 seconds after open time, a property influenced by ambient relative humidity; at relative humidity above 60 %, forced air movement across the adhesive line is increased to maintain tack consistency. The formed tube is cut and stacked only after moisture content falls below 8 wt% in the outer paper ply to prevent telescoping. Adhesion is monitored with peel tests according to ASTM D903-98 or by burst strength of the finished tube. Since no plasticizer migration test is fully harmonized for this conversion route, long-term bond retention on plasticized polyvinyl chloride films must be confirmed under storage at 40 °C and 75 % RH for 14 days. Terminal products include mailing tubes, calendered paper cores, and wrapper cartons.
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Resyn 1601 is supplied as a white, free-flowing powder based on a high molecular weight vinyl chloride–vinyl acetate copolymer. The product is identified by CAS number 9003-22-9 and functions as a thermoplastic solution resin in industrial coatings, metal packaging lacquers, gravure and flexographic printing inks, and heat-seal adhesives. The vinyl acetate content is reported at 14 wt%, with the balance predominantly vinyl chloride; this composition supports solvent-release film formation, barrier properties, and chemical resistance after solvent evaporation. The glass transition temperature measured by differential scanning calorimetry under ASTM D3418-21 is 72°C. Specific gravity determined by ASTM D792-20 is 1.39. The weight-average molecular weight by gel-permeation chromatography against polystyrene calibration under ASTM D5296-19 is approximately 78 000 g/mol. Because the resin contains no deliberately introduced hydroxyl or carboxyl functionality, it remains thermoplastic after drying and does not enter into isocyanate or aminoplast crosslinking reactions unless it is blended with a reactive co-resin. This characteristic distinguishes Resyn 1601 from hydroxyl-modified and carboxyl-modified vinyl copolymers with respect to chemical resistance, adhesion mechanism, and re-solubility.
Lot acceptance is controlled against a certificate-of-analysis profile that includes molecular weight, solution viscosity, and residual moisture. The following specification block is typical of this resin class; users should confirm values against the current lot certificate.
| Property | Test Method | Typical Value |
|---|---|---|
| Appearance | Visual | White powder |
| Specific gravity | ASTM D792-20 | 1.39 |
| Glass transition temperature | ASTM D3418-21 | 72°C |
| Weight-average molecular weight | ASTM D5296-19 | 78 000 g/mol |
| Inherent viscosity, 1% in cyclohexanone at 25°C | ASTM D1243-22 | 1.04–1.06 dL/g |
| Vinyl acetate content | ASTM D2124-99(2019) | 14 wt% |
| Acid number | ISO 2114:2000 | <0.5 mg KOH/g |
| Hydroxyl value | ISO 4629-1:1996 | <5 mg KOH/g |
| Moisture content | ASTM D4017-22 | <0.3 wt% |
| Bulk density | ASTM D1895-17 | 0.55–0.65 g/cm³ |
Variability in solution viscosity is typically controlled within ±5% across lots when moisture content remains below 0.3 wt%. If storage occurs above 60% relative humidity, moisture uptake raises the powder moisture content and can produce surface defects during solvent casting; pre-drying in a dehumidified air dryer at 40–45°C for 4 h is required before use. The resin should not be held above 120°C for prolonged periods during storage or drying because thermal dehydrochlorination can begin at elevated temperature.
Dissolution kinetics are controlled by solvent composition, agitation intensity, and batch temperature. In gravure and flexographic packaging ink vehicles, Resyn 1601 is dissolved at 35–40% solids in an 80:20 blend of methyl ethyl ketone and toluene using a high-shear disperser equipped with a Cowles blade at 10–15 m/s tip speed. Under these conditions, a clear solution with a Brookfield viscosity of 25–40 mPa·s at 25°C per ASTM D2196-20 is typically obtained within 45–60 min. If the ester fraction is increased above 50% of the active solvent, solution viscosity decreases but retained solvent in the dried film increases; if aromatic content exceeds 60%, viscosity rises and let-down stability may be compromised. Agitation below 5 m/s tip speed can produce gel bodies and extended solvation times, while tip speed above 20 m/s can generate excessive frictional heat and accelerate solvent loss.
High-solids coil-coating formulations are prepared by adding the resin to a premixed solvent blend under agitation at 15–20 m/s. The addition rate is controlled to prevent granule agglomeration, and the batch is held at 35–40°C for 60 min to complete solvation. If the batch temperature is raised above 50°C, methyl ethyl ketone evaporation can alter the solvent balance and raise viscosity during let-down; a chilled condenser or solvent replenishment is required. In production-scale baffled tanks with a 2:1 diameter-to-blade ratio, batch-to-batch viscosity variation of ±5% is achievable when resin moisture is below 0.3 wt% and solvent quality is monitored by gas chromatography.
Vinyl chloride sequences in the copolymer undergo dehydrochlorination above 140°C; the rate accelerates rapidly above 160°C, with colour shift from colourless to amber and evolution of hydrogen chloride. In coil-coating lines where peak metal temperatures of 199–216°C are used for 30–40 s, a thermal stabilizer package is required. The stabilizer should be an organotin mercaptide at 1.5–2.5 phr or a calcium-zinc system at 3–4 phr. Amine-based additives are incompatible because they catalyse hydrochloride acid elimination and produce salt adhesion failures on tinplate, with cross-cut adhesion falling below 3B under ASTM D3359-23. Zinc oxide should be avoided in formulations that will be heated above 160°C because it can promote crosslinking and reduce elongation at break as determined by ASTM D638-14. The onset of hydrogen chloride liberation can be monitored in oven exhaust using a Dräger tube calibrated to 1 ppm; sustained readings above this threshold indicate that barrel or oven zone temperatures exceed the stabilizer capacity and require immediate adjustment.
For extrusion lamination and heat-seal adhesive compounding, Resyn 1601 is pre-blended with plasticizer as required for seal initiation temperature. Processing on a 45 mm co-rotating twin-screw extruder with 36:1 L/D requires screw zones maintained below 140°C and vacuum venting at −0.08 MPa to remove residual solvent or moisture. Die-lip build-up is observed when barrel temperatures exceed 150°C due to hydrogen chloride release; purge intervals are therefore set at 8 h on continuous lines. Strongly alkaline pigments and amine-based melt additives are contraindicated because they accelerate dehydrochlorination and reduce thermal processing latitude.
Formulators replacing a hydroxyl-modified vinyl chloride–vinyl acetate copolymer in a two-pack polyisocyanate lacquer must remove the isocyanate curative. Resyn 1601 has a hydroxyl value below 5 mg KOH/g by ISO 4629-1:1996 and will not build molecular weight through urethane linkages. The film remains thermoplastic and can be re-dissolved by strong ketones; cured chemical resistance is obtained by solvent selection and pigment loading rather than crosslink density. In contrast, a carboxyl-modified vinyl chloride–vinyl acetate–maleic acid terpolymer has an acid number of 10–20 mg KOH/g and improves adhesion to aluminium through acid-base interaction with the oxide layer. Resyn 1601, with an acid number below 0.5 mg KOH/g by ISO 2114:2000, does not provide the same wetting on untreated aluminium; an epoxy phosphate pre-treatment or a chromium-free titanium-zirconium conversion coating per EN 12487:2007 is required before coating. This substitution removes isocyanate handling but also lowers adhesion on bare metal and solvent resistance after rubbing with methyl ethyl ketone; ASTM D4752-20 double rubs may fall from above 200 to 50–70 unless a thermosetting polyester is blended at 20–30 wt%.
| Functional Parameter | Resyn 1601 | Hydroxyl-Modified VC/VA Copolymer | Carboxyl-Modified VC/VA/MA Terpolymer |
|---|---|---|---|
| Acid number | <0.5 mg KOH/g | <1 mg KOH/g | 10–20 mg KOH/g |
| Hydroxyl value | <5 mg KOH/g | 55–75 mg KOH/g | <5 mg KOH/g |
| Crosslink response | None; thermoplastic film | Isocyanate/melamine cure | Acid-catalysed aminoplast/epoxy cure |
| Aluminium adhesion without pre-treatment | 2B under ASTM D3359-23 | 4B under ASTM D3359-23 | 5B under ASTM D3359-23 |
| Re-solubility after dry film formation | Readily re-dissolved in ketones | Limited after cure | Limited after cure or salt formation |
Published data for this specific configuration is limited; the comparative values are derived from general resin-class data and should be verified on the target substrate and coating line before conversion.
In can interior lacquers for three-piece tinplate food cans, Resyn 1601 is spray-applied at 30–35% solids in a 50:35:15 blend of methyl ethyl ketone, toluene, and butyl acetate. The film is dried in a continuous oven with peak metal temperature of 200–205°C for 12–15 min. Film weight is maintained at 8–10 g/m²; cross-hatch adhesion on tinplate achieves 5B under ASTM D3359-23 when an epoxy phosphate primer is used at 2–3 g/m². The film resists 3% acetic acid at 121°C for 30 min without blistering in a laboratory autoclave protocol. Printed and coated packaging stock is processed on a central impression flexographic press with solvent recovery; ink viscosity at the station is maintained at 18–22 s through a #3 Zahn cup at 25°C. Dilution to press viscosity with a 70:30 ethyl acetate–ethanol blend maintains dry colour strength; evaporation rate is measured by ASTM D3539-11. Extrusion lamination using a 90 mm single-screw extruder with 30:1 L/D applies a 12 µm low-density polyethylene layer at 315°C melt temperature; the heat-seal layer is activated at 120–130°C with a 1.5 s dwell and 0.5 MPa jaw pressure. Under these conditions, lap-shear bond strength exceeds 1.5 N/15 mm when measured by ASTM F88/F88M-21.
