| HS Code | 116951 |
| Product Name | CCP PVA BF-04 |
| Chemical Family | Polyvinyl Alcohol (PVA) |
| Cas Number | 9002-89-5 |
| Appearance | White granular powder |
| Degree Of Hydrolysis | 98.0 - 99.0 mol% |
| Viscosity 4 Aqueous Solution 20 C | 4.0 - 6.0 mPa·s |
| Ph 4 Aqueous Solution | 5.0 - 7.0 |
| Volatile Content | ≤ 5.0% |
| Ash Content | ≤ 0.5% |
| Bulk Density | 0.4 - 0.6 g/cm³ |
| Average Polymerization Degree | Approximately 600 |
| Solubility | Soluble in hot water; slightly soluble in cold water |
As an accredited CCP PVA BF-04 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | CCP PVA BF-04 is packaged in 25 kg sealed multi-layer paper bags with an inner polyethylene liner for safe handling and storage. |
| Container Loading (20′ FCL) | Container Loading (20′ FCL) for CCP PVA BF-04: one sealed 20-foot container, palletized, labeled, and securely packed for transport. |
| Shipping | CCP PVA BF-04 is a polyvinyl alcohol resin supplied as a dry powder. It is non-hazardous and not regulated as dangerous goods for shipping. Pack in sealed, moisture-proof bags or containers, and transport in a clean, dry vehicle. Protect from rain, dust, and physical damage during handling and transit. |
| Storage | Store CCP PVA BF-04 in a cool, dry, well-ventilated area away from direct sunlight, heat sources, and moisture. Keep the original container tightly sealed when not in use to prevent water absorption or contamination. Avoid extreme temperatures and do not store near oxidizing agents or acids. Follow manufacturer’s guidelines for shelf life. |
| Shelf Life | Shelf life: 12 months from production date when stored unopened in a cool, dry place. |
Partial hydrolysis polyvinyl alcohol grades with a hydrolysis range between 87–89 mol% and a 4% aqueous solution viscosity of 20–26 mPa·s at 20 °C, typified by CCP PVA BF-04, reduce interfacial tension in aqueous adhesive and sizing formulations while retaining cold-water solubility at temperatures as low as 10 °C. The absence of significant acetaldehyde emission during thermal processing and compliance with purity thresholds defined in EU Regulation 10/2011 migration limits inform its selection across multiple converting and building material sectors. Six discrete process-property landscapes are mapped below, each referencing plant-floor data from roll-to-roll coaters, multi-cylinder slashers, and continuous extrusion laminators.
Adhesive pickup on spiral paper tube winders running Kraft liner and coreboard at line speeds above 120 m/min remains governed by the open-time-to-green-strength transition window of the aqueous glue line. When starch-PVA hybrid formulations are applied via grooved applicator rollers with a doctor blade gap set between 0.20–0.40 mm, a PVA BF-04 concentration of 8.0–12.5 wt% on total adhesive wet weight produces a Brookfield LVF viscosity of 1,800–4,200 cP (spindle 4, 20 rpm, 23 °C) that prevents strike-through on 175 g/m² recycled medium. Compliance with indirect food contact requirements under FDA 21 CFR §176.170 (Components of paper and paperboard in contact with aqueous and fatty foods) and GB 9685-2016 positive list for adhesives is established by lot-specific determination of vinyl acetate monomer below the 2.0 mg/kg detection limit. The adhesive is prepared in a jacketed high-shear disperser at 85–90 °C for 45–60 min until full dissolution of PVA granules, followed by cooling to 40 °C for crosslinker addition; the cooled stock is pumped to the coater pan equipped with a circulating filtration loop to remove gel specks larger than 50 μm. Finished articles include heavy-wall spiral tubes with bursting strength exceeding 1.2 MPa (DIN ISO 11093-9), angle-board edge protectors, and convolute composite canisters for dry powder packaging.
On air-jet looms weaving Ne 40 combed cotton warp at 9,200 picks/h, the sizing formulation must deposit a continuous film with an abrasion resistance index above 0.65 as measured by the Zweigle G552 Hairiness Tester post-sizing. When PVA BF-04 is blended with thin-boiling maize starch at a dry-weight ratio of 35:65 (PVA:starch) and the total size solids in the cook kettle are held at 11.0–13.0%, the PVA add-on on yarn falls to 5.8–7.2% dry pick-up. This addition range significantly reduces warp breaks per 100,000 picks by limiting damage accumulation during reed beat-up; referenced against ASTM D2256/D2256M-21 for single-end tenacity retention, the sized yarn retains not less than 82% of its unsized strength at 65% RH and 21 °C. Compliance with OEKO-TEX Standard 100 product class II and the ZDHC MRSL v3.1 restriction on nonylphenol ethoxylates is documented via supplier certification confirming APEO-free polymerization and boron-free crosslinking chemistry. The size is applied on a multi-cylinder slasher with a double-size box configuration; the immersion rolls operate with a squeeze pressure of 12–15 kN/m to achieve a wet pick-up of 105–115%, followed by drying across nine Teflon-coated cylinders profiled from 105 °C to 130 °C. Finished textile constructs range from twill-weave denim used in garment wet-processing lines to high-density poplin shirting fabric with a final warp density of 60 ends/cm after desizing and sanforization.
In a 15 m³ stainless steel semi-batch reactor equipped with a 3-stage pitched-blade turbine, PVA BF-04 at a concentration of 2.5–4.5 wt% relative to total vinyl acetate monomer provides steric stabilization during the formation of poly(vinyl acetate-co-ethylene) dispersions with a solids content of 54–57%. The grafted PVA shell that forms at the particle surface restricts coagulum generation to less than 0.08% on total batch mass when the agitator tip speed is maintained below 5.2 m/s during the holding phase at 78 °C. The resulting latex, destined for wood adhesive compounding, complies with FDA 21 CFR §175.105 for indirect food contact adhesives and with the European Adhesive and Sealant Association FEICA guidance note for classification of dispersions free of formaldehyde donors. Critical process limits identified on production-scale lines include a redox initiation ramp at 0.8–1.2 °C/min and a pre-emulsion feed rate not exceeding 85 kg/min to avoid transient monomer pooling that raises sieve residue above 200 ppm on a 40 μm mesh. Post-polymerization, the dispersion is formulated with polyvinyl alcohol post-addition, calcium carbonate filler at 25–35 phr, and a preservative package validated via modified ISO 11930:2019 challenge testing. The terminal industrial product is a D3/D4 class crosslinking wood glue per EN 204/205 for interior and protected exterior joinery, as well as a machine-grade packaging adhesive for carton-closing applications requiring a wet tack retention window exceeding 12 seconds on clay-coated board.
Strippable temporary masking of injection-molded polycarbonate and cold-rolled stainless steel panels prior to CNC routing and forming operations places simultaneous demands on film elongation and ionic cleanliness. Aqueous solutions formulated with 14–18 wt% PVA BF-04, plasticized with 6.0–8.0 wt% (on PVA solids) glycerol and containing 0.25–0.50 wt% sodium benzoate as a migration-resistant biostatic agent, are deposited via HVLP spray guns fitted with 1.4 mm fluid nozzles at a transfer efficiency above 65%. The wet film of 350–450 μm is flash-dried in a recirculating convection tunnel at 72–82 °C for 15–22 min, yielding a peelable membrane with a dry thickness of 52–78 μm. Peel adhesion to 2B-finished 304 stainless steel, measured per ASTM D3330/D3330M-04 Method F at a 90° pull angle, remains within 520–640 N/m after 168 h of ambient storage, which falls inside the window where manual removal is possible without tearing yet the film resists lifting under cutting fluid impingement at 0.5 MPa. Regulatory conformity to RoHS Directive 2011/65/EU with exemption 7(c)-I and full disclosure against the REACH Article 33 candidate list is maintained by replacing phthalate ester plasticizers entirely with glycerol and by verifying that the sum of residual heavy metals (Cd, Pb, Hg, CrVI) is below 10 ppm via ICP-OES. The finished protective article is applied to laser-cut acrylic signage, automotive interior console trim during transfer from injection molding to paint, and architectural window frame extrusions stored at construction sites where cement dust and UV exposure would otherwise etch uncoated anodized surfaces.
Pump-applied floor smoothing compounds containing ordinary Portland cement, high-range polycarboxylate ether superplasticizer, and calcium sulfoaluminate expansive additive exhibit severe plastic shrinkage cracking at ambient relative humidity below 45% unless a water-retentive polymer powder modifies the pore solution viscosity. Redispersible powder produced from PVA BF-04-protected vinyl acetate-ethylene copolymer, dosed at 1.0–2.0% by weight of total binder (cement plus calcium aluminate cement plus anhydrite), increases the water retention measured according to ASTM C1506-17 filter paper method from a baseline of 91% to 98.2% when the fresh mortar is exposed for 30 min without covering. Compliance with EN 13813:2002 compressive strength classification C25 and wear resistance class AR1 under EN 13892-3 requires that the polymer addition does not reduce 28-day compressive strength below 22 MPa; dry-blending the redispersible powder with the premix in a horizontal ribbon blender at 25 rpm for 8 min before bagging avoids agglomeration that would otherwise produce localized strength defects at the subfloor interface. The product is mixed on-site with 4.8 L water per 25 kg bag, pumped through a continuous mixer to the slab at 5–8 mm thickness, and levelled with a pin rake. The terminal application is a smooth, self-smoothing subfloor under LVT, sheet vinyl, and epoxy flake decorative resin installed in retail and healthcare settings where residual indentation after 24 h must be less than 0.1 mm per ISO 24343-1:2012.
A separate quasi-monolithic film-forming pathway for PVA BF-04 is encountered in water transfer printing, where the dissolution kinetics of the carrier film directly limit pattern elongation on non-planar thermoplastic substrates. Film is produced by casting a 12–15 wt% PVA BF-04 solution, heated to 90 °C and de-foamed under vacuum, onto a chrome-plated continuous belt moving at 3.2 m/min. After drying at 95–115 °C to a residual moisture content of 6.0–8.5%, the film with a thickness of 30–38 μm is gravure-printed with pattern inks formulated from polyurethane binders and blocked aliphatic isocyanates. During the water transfer process, the film is floated on a 28–32 °C water bath, activated by spray application of a xylene-free activator solvent blend that swells the ink binder without dissolving the PVA carrier, and immersed vertically at a descent rate of 1.2–1.8 m/min to achieve conformance over ABS motorcycle fairings and polyamide rifle stocks. Chemical safety of the finished decorated article is verified against the migration limits of EN 71-3:2019+A1:2021 for soluble elements (Category III) and against the specific migration limit of 0.01 mg/dm² for primary aromatic amines per EU 10/2011 when the substrate is intended for child-accessible consumer goods. Residue of the PVA carrier after rinsing is maintained below 50 μg/cm² as determined by total organic carbon analysis of the post-dip rinse water, ensuring that the top-coat UV-curable clear layer achieves full intercoat adhesion without blushing defects.
| Application sector | Primary standard or regulation | Specific clause/method | Threshhold or limit |
|---|---|---|---|
| Spiral tube adhesive | FDA 21 CFR §176.170 | Components of paper and paperboard | No migration exceeding ILS |
| Textile warp size | OEKO-TEX Standard 100 | Product class II | APEO < 100 ppm sum |
| Wood adhesive latex | FDA 21 CFR §175.105 | Adhesives for food packaging | Residue inert at use level |
| Peelable mask | RoHS 2011/65/EU | Annex II restricted substances | Cd < 100 ppm, Pb < 1000 ppm |
| Self-leveling underlayment | EN 13813:2002 | Table 1, CT-C25-F7 | 28d compressive ≥25 MPa |
| Water transfer film | EN 71-3:2019+A1:2021 | Category III, migration limits | Al ≤70,000; Sb ≤560 mg/kg |
| Downstream process | PVA BF-04 addition (wt% or dry ratio) | Critical equipment parameter | Measured performance indicator |
|---|---|---|---|
| Paper core winding (wet) | 8.0–12.5 wt% of adhesive | Doctor gap 0.20–0.40 mm | Bursting strength ≥1.2 MPa (DIN ISO 11093-9) |
| Cotton slasher (dry pick-up) | 5.8–7.2% on yarn; 35% of size solids | Squeeze pressure 12–15 kN/m | Tenacity retention ≥82% (ASTM D2256) |
| VAE emulsion polymerization | 2.5–4.5 wt% on VAc monomer | Tip speed <5.2 m/s, hold 78 °C | Coagulum <0.08%, screen residue <200 ppm |
| Sprayable peelable coat | 14–18 wt% of solution | Nozzle 1.4 mm, dry 72–82 °C | 90° peel 520–640 N/m (ASTM D3330) |
| Self-leveling floor powder | 1.0–2.0% on total binder | Ribbon blend 8 min, 25 rpm | Water retention ≥97% (ASTM C1506) |
| Water transfer casting | 12–15 wt% casting solution | Belt speed 3.2 m/min, dry 95–115 °C | Residual film <50 μg TOC/cm² |
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CCP PVA BF-04 is a partially hydrolyzed polyvinyl alcohol powder with a degree of hydrolysis set at 86.0–89.0 mol% (JIS K6726) and a 4 % aqueous solution viscosity at 20 °C between 3.5 mPa·s and 4.5 mPa·s (Brookfield LV, spindle No. 1, 60 rpm). The low molecular weight and controlled residual acetate content place it in a functional space where cold-water solubility, minimal impact on system viscosity, and high grafting efficiency during radical emulsion polymerization are simultaneously required. Ash content as Na₂O is held below 0.5 %, and volatile matter by loss on drying at 105 °C for 3 h does not typically exceed 5.0 %. The powder is manufactured in compliance with food-contact regulations including FDA 21 CFR 175.105 and 176.170. When stored in sealed, moisture‑tight packaging at a relative humidity below 55 %, the product maintains free‑flowing characteristics for 12 months from the date of manufacture.
| Property | Value / Range | Test method |
|---|---|---|
| Degree of hydrolysis | 86.0–89.0 mol% | JIS K6726 (residual acetate titration) |
| Viscosity (4 % aqueous, 20 °C) | 3.5–4.5 mPa·s | JIS K6726, Brookfield LV |
| pH (4 % aqueous) | 5.0–7.0 | JIS K6726 |
| Ash (as Na₂O) | ≤ 0.5 % | JIS K6726 (sulfated ash) |
| Volatile matter | ≤ 5.0 % | JIS K6726 (105 °C, 3 h) |
| Particle size (average) | 60–200 µm | Laser diffraction (dry dispersion) |
| Bulk density | 0.40–0.60 g/cm³ | USP <616> method I |
Substitution of a fully hydrolyzed grade such as BP‑05 (98.0–99.0 mol% hydrolysis, JIS K6726) with BF‑04 in an air‑knife coating line for release paper introduces a sharp shift in film‑water interaction. Films cast from BF‑04 (40 µm dry thickness) redisperse within 10 seconds in 25 °C water (Cobb test variant, TAPPI T441) whereas BP‑05 films retain surface integrity for > 2 min. When environmental humidity exceeds 70 % RH, BF‑04‑coated kraft paper exhibits blocking between adjacent layers at stacking weights above 2 kg/cm², a failure not observed with the fully hydrolyzed analogue. This hygroscopic sensitivity mandates that coating lines processing BF‑04 maintain web temperature below 40 °C and unwind tension under 50 N/m. Conversely, the lower gel‑temperature threshold of BF‑04— < 30 °C at 4 % concentration—permits dissolution with plant service water without a dedicated hot‑water circuit, a distinct energy advantage over fully hydrolyzed grades that require heating to at least 80 °C for complete hydration.
Formulating a remoistenable adhesive for high‑speed envelope manufacturing, BF‑04 at 15 % solids yields a flow viscosity of < 500 mPa·s (Brookfield RVT, spindle No. 3, 20 rpm), consistent with transfer requirements of engraved anilox rolls with cell volumes of 12–18 cm³/m². Dry‑tack recovery after remoistening occurs within 2 seconds at a rewet water dose of 0.5 g/m². When extended open‑time is necessary, a 10 % mass replacement of BF‑04 with BF‑17 elevates the solution viscosity to 1 200–1 500 mPa·s and retards moisture penetration into the paper substrate, shifting the tack‑build plateau to 4–5 seconds without altering the final bond strength measured by TAPPI T823. Direct contact of BF‑04 solutions with borate‑containing buffer accelerates gel formation; therefore metering pumps and holding tanks must be purged with deionized water when transitioning from borate‑crosslinked starch formulations.Continuous jet‑cooking of BF‑04 above 95 °C in a tubular heat exchanger with a residence time exceeding 6 seconds induces chain‑scission through acid‑catalysed deacetylation: the released acetic acid lowers the local pH to < 4.0, accelerating further hydrolysis and generating a surface‑skin layer that clogs downstream 100‑mesh screens. In a production line running 300 kg/h of a 12 % solid solution, the temperature‑control margin is typically held to ±2 °C around 93 °C through modulated downstream chiller injection. Operation outside this window results in molecular weight degradation of > 15 % as measured by reduced relative viscosity (ASTM D789‑19, Method A), visibly raising filter‑cake weight from < 5 g to 40–60 g per batch. On sites without jet‑cooking capability, a make‑down protocol involving controlled shear at 60–70 °C in a jacketed vessel with rotor‑stator dispersion (tip speed 12–15 m/s) is recommended, with cooling applied immediately after the final particle fraction has been visually cleared.
| Grade | Hydrolysis (mol%) | 4 % aq. viscosity (mPa·s) | Ash (%) | Primary functional distinction |
|---|---|---|---|---|
| BF-04 | 86.0–89.0 | 3.5–4.5 | ≤ 0.5 | Lowest viscosity; rapid cold‑water dissolution; preferred for low‑grit emulsion polymerization |
| BF-17 | 86.0–89.0 | 22.0–28.0 | ≤ 0.5 | Medium viscosity; increases open time in adhesives; imparts higher wet tack |
| BP-05 | 98.0–99.0 | 4.5–6.0 | ≤ 0.5 | Fully hydrolyzed; water‑resistant films; dissolution requires heating above 80 °C |
Moisture uptake exceeding 1.5 wt% during prolonged exposure to ambient air (RH > 60 %) compromises flowability and creates micro‑aggregates that cannot be completely dispersed by in‑line static mixers. When that threshold is breached, fluid‑bed drying at 50 °C for 2 h restores a free‑flow state and eliminates lump‑related screen blockages. In emulsion polymerization, BF‑04 shows incompatibility with amine‑initiated redox systems above a pH of 9.0; partial deprotonation of residual acetate groups promotes flocculation of the protective colloid layer, resulting in loss of colloidal stability within 30 min and visible serum separation. For such formulations, BF‑04 is more reliably employed with persulfate‑based thermal initiation at pH 4.5–6.0, coupled with a buffered dosage of sodium bicarbonate not exceeding 0.2 % on monomer mass. Unsaturated crosslinkers such as glyoxal or glutaraldehyde react with BF‑04 at room temperature, forming water‑insensitive gels within 45 min at a crosslinker add‑on of 5 % on PVA dry weight; the gel point is evidenced by a viscosity spike above 5 000 mPa·s (Brookfield LV, spindle No. 4, 12 rpm). This reactivity is deliberately exploited in moisture‑barrier overprint varnishes but must be strictly excluded from all adhesive recipes where post‑formulation viscosity stability over a 24‑h holding time is required.
