| HS Code | 524717 |
| Product Name | B06SY Chang Chun PVB Resin |
| Chemical Name | Polyvinyl butyral |
| Appearance | White free-flowing powder |
| Weight Average Molecular Weight Mw | 50000 - 70000 g/mol |
| Solution Viscosity 10 In Ethanol 25 C | 20 - 30 mPa·s |
| Hydroxyl Content | 22 - 26 % |
| Butyral Content | 68 - 72 % |
| Acetyl Vinyl Acetate Content | 1 - 3 % |
| Glass Transition Temperature Tg | 65 - 70 °C |
| Specific Gravity | 1.10 - 1.15 |
| Refractive Index | 1.485 - 1.490 |
| Solubility | Soluble in ethanol, methanol, n-butanol, isopropanol, dimethylformamide, and ketones |
| Acid Value | ≤ 1.0 mg KOH/g |
| Moisture Content | ≤ 0.5 % |
| Ash Content | ≤ 0.1 % |
As an accredited B06SY Chang Chun PVB Resin factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | B06SY Chang Chun PVB Resin: 20 kg net, supplied in moisture-resistant laminated paper bags with inner PE liner. |
| Container Loading (20′ FCL) | 20′ FCL container loading of B06SY Chang Chun PVB Resin: bagged pallets, securely stowed, dry, ventilated, protected from moisture and damage. |
| Shipping | B06SY Chang Chun PVB Resin is shipped as non-hazardous granules/powder in sealed, moisture-proof woven bags or drums. Keep dry, avoid direct sunlight, and store in ventilated conditions. No special transport restrictions required, but protect packaging from damage during handling. |
| Storage | Store B06SY Chang Chun PVB Resin in a cool, dry, well-ventilated area, away from heat, sparks, and open flames. Keep containers tightly sealed to prevent moisture absorption and contamination. Avoid direct sunlight and high humidity; ideal storage temperature is below 30°C. Use within its stated shelf life for optimal performance. |
| Shelf Life | Shelf life is typically 12 months from manufacture date when stored sealed, cool, and dry. Avoid moisture and heat. |
In laminated glass interlayer production, Chang Chun PVB Resin B06SY is compounded at 22–38 phr with triethylene glycol bis(2-ethylhexanoate) or a mixed aliphatic diester plasticizer, depending on whether the downstream laminate is automotive or architectural glazing. The hydroxyl content governs equilibrium glass adhesion and must be read from the supplier certificate before the plasticizer ratio is fixed; a shift of even 0.5 phr in plasticizer level changes pummel adhesion and must be revalidated by a laminate adhesion test. Compounding is carried out on a co-rotating twin-screw extruder with an L/D ratio of at least 40:1 and vacuum devolatilization. Melt temperature is measured at the die and held between 185 °C and 215 °C; zone temperatures above 220 °C accelerate acid-catalyzed thermal degradation and yellowing. Resin pre-drying is performed in a dehumidified-air fluidized-bed dryer at 50–60 °C until residual moisture is ≤0.20 wt%; higher residual moisture produces bubbles, haze, and drift in adhesion after humidity aging. Optical properties of the interlayer film are measured under ISO 13468-1:2019 for total luminous transmittance and ASTM D1003-21 for haze. Laminate impact performance is tested to ISO 12543-2:2021 for architectural laminated safety glass and to ANSI Z26.1-2019 for automotive glazing. The processing window is narrow because hydroxyl content, residual moisture, and plasticizer level interact: excess moisture displaces plasticizer effectiveness, while insufficient moisture can produce static charge and handling defects in thin-gauge interlayer. The terminal products are automotive windshields and architectural laminated safety glass, but the process is highly sensitive to batch-to-batch variance in hydroxyl number and residual acetate content.
Metal pretreatment systems formulated with PVB B06SY are prepared as two-component wash primers because direct one-component storage of phosphoric acid with alcohol-borne PVB leads to viscosity rise and eventual gelation. In the pigment-free or zinc-phosphate-containing base component, B06SY is dissolved in an anhydrous isopropanol/n-butanol 2:1 blend at 20–25 wt% solids using a stainless steel high-dispersion mixer. The final mixed primer typically contains 7.0–9.0 wt% B06SY, 3.5–4.5 wt% 85% phosphoric acid, and 8.0–10.0 wt% zinc phosphate or zinc molybdophosphate; hexavalent chromium pigments are excluded because REACH Annex XIV restricts chromium(VI) compounds in metal surface treatment. The acid component is added to the cooled resin solution at a controlled rate of 0.2–0.5 kg/min per 100 kg batch while maintaining batch temperature below 30 °C. Faster addition causes localized precipitation of PVB at the acid inlet and creates gel specks that clog spray nozzles. Application is performed with an HVLP spray gun equipped with a 1.0–1.3 mm fluid nozzle, yielding a dry film thickness of 8–12 µm. Topcoating is delayed for 24 h at 20–25 °C and 40–55% RH to allow acid etching and solvent release. Adhesion is evaluated by ASTM D3359-17 Method B cross-cut and corrosion resistance by ASTM B117-19 neutral salt spray. The primed surface is subsequently overcoated with a polyurethane or alkyd topcoat. The main operational boundaries are water content in the solvent blend, which must remain below 2.0 wt%, and contact with tertiary amines, which neutralize the acid before substrate passivation.
Binder burnout in ceramic tape casting presents a conflict between oxidation rate and green tape integrity. PVB B06SY is dissolved at 12–18 wt% in a solvent blend based on methyl ethyl ketone, ethanol, and a high-flash aromatic diluent; the mixed slurry contains ceramic powder at 54–62 vol% solids, PVB binder at 5–8 wt% of powder mass, and dibutyl phthalate or benzoate plasticizer at 15–20 wt% of binder solids. Ball milling is performed with yttria-stabilized zirconia media of 10 mm diameter at 60–70 rpm for 12–24 h; the hydroxyl groups on PVB hydrogen-bond with oxide surface silanols, and this interaction controls dispersion viscosity. The slurry is vacuum-deaired at 10–20 kPa absolute pressure and cast through a doctor blade gap of 0.2–1.0 mm onto silicone-coated polyethylene terephthalate carrier at 0.5–2.0 m/min. Green tape thickness is measured inline with a laser micrometer, and B06SY solution viscosity is checked with a rotational rheometer at 25 °C and 100 s⁻¹ to detect molecular-weight drift caused by moisture or thermal history. Debinding is the critical threshold: the tape passes through 180–380 °C at a heating rate not exceeding 0.5 °C/min, followed by an isothermal hold at 380–450 °C for 1–2 h under sufficient oxygen partial pressure. Rapid heating traps volatile oxidation products, blisters the tape, and leaves carbon residue above 0.05 wt%, which subsequently degrades dielectric strength. Terminal products include alumina substrates, dielectric tapes, and multilayer electronic ceramic components after binder burnout and sintering. Published B06SY-specific burnout data is limited; production furnaces should be profiled by TGA-FTIR before setting ramp rates. Sintered density and porosity are verified by ASTM C373-18, and dielectric breakdown strength is measured by ASTM D149-20.
Flexographic and gravure ink systems use PVB B06SY at 8–12 wt% of final ink in an ethanol/n-propyl acetate blend ranging from 70:30 to 60:40. The resin is pre-dissolved in a closed mixing vessel at 35–45 °C for 2–4 h under moderate shear; temperatures above 50 °C volatilize the low-boiling solvent and can deposit resin on the vessel wall. Finished ink viscosity is adjusted to 18–25 s through a Zahn Cup #2 at 25 °C; because the system is solvent-borne, pH adjustment is not applicable and viscosity is the primary release parameter on press. Adhesion to corona-treated polypropylene, polyester, and aluminum foil is tested by cross-cut and tape adhesion per ISO 2409:2020 after 24 h ambient cure; lamination bond strength is tested by ASTM F904-21 after the printed web is laminated with a polyurethane adhesive. In surface-printed structures, the ink must resist swelling by the laminating adhesive diluent; excessive solubility of the PVB binder in ester or ketone diluents causes ink thinning and cohesive failure at the ink-adhesive interface. For food-contact printed materials, migration testing under FDA 21 CFR 175.300 or Commission Regulation (EU) No 10/2011 determines compliance; resin selection alone does not guarantee regulatory status. This segment is less sensitive than ceramic debinding or acid-catalyzed wash primer processing, but it requires water in the ethanol feedstock to remain below 1.0 wt% because water induces PVB gelation in low-polarity solvent blends.
For two-part polyurethane laminating adhesives modified with PVB B06SY, the resin is pre-dissolved in ethyl acetate at 25–35 wt% solids and introduced into the polyol component before isocyanate addition. B06SY hydroxyl groups consume part of the isocyanate; the isocyanate index is therefore set at 1.05–1.15 to keep the stoichiometric balance after modification. Typical addition is 5–15 wt% B06SY based on total solids, and mixing is performed on a high-shear disperser at 500–1000 rpm. Tertiary-amine catalysts must be avoided or sharply limited because they accelerate both isocyanate-PVB reaction and yellowing; organotin catalysts are more common where pot life permits. Pot life is measured as viscosity doubling time with a Brookfield viscometer at 25 °C, and production batches typically fall between 30–90 min depending on isocyanate index, catalyst type, and solvent moisture. Adhesive application through a static mixer with 24–32 elements and a gear pump is used to minimize unmixed striations that create localized crosslink density variation. Bond performance is evaluated by ASTM D1876-08 T-peel for flexible laminates and ASTM D1002-19 lap shear for rigid substrates. The operational boundary is moisture ingress: solvent or substrate water above 0.5 wt% consumes isocyanate and reduces crosslink density, and ambient processing above 60% RH requires sealed solvent lines and dried laminating webs.
Textile coating and leather finishing lines apply PVB B06SY only in solvent-borne formulations where heat-sealability, film clarity, and fast solvent release are required. Application is by rotary screen or knife-over-roll at 10–20 g/m² dry add-on. Crosslinking with a polyisocyanate at 3–5 wt% of resin solids or with a melamine-formaldehyde resin at 120–140 °C cure is used to raise abrasion resistance. Abrasion performance is tested by ISO 12947-2:2016 and color fastness by ISO 105-B02:2014. Uncrosslinked PVB has poor resistance to water and is unsuitable for apparel or footwear exposed to repeated wetting.
Glass enamel screen-printing pastes for automotive and architectural glazing use PVB B06SY as the primary binder for controlled paste rheology and clean burnout before ceramic frit fusion. The paste contains 8–12 wt% B06SY, 65–75 wt% ceramic frit, and 10–15 wt% solvent blend based on terpineol and butyl diglycol acetate. Screen printing is performed through 200–325 mesh stainless steel screens; the printed glass is dried at 120–150 °C for 5–10 min and fired at 580–620 °C for 3–8 min. Complete binder burnout must occur before 450 °C; residual carbon from an overly fast burnout creates pinholes and weakens enamel-to-glass adhesion. The main processing boundary is the binder-to-frit ratio: too little B06SY produces poor screen release and edge definition, while too much raises organic residue and increases pinhole density after firing.
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Polyvinyl butyral resin B06SY is a solvent-soluble acetal resin manufactured by Chang Chun Petrochemical Co., Ltd. and supplied under the trade designation Chang Chun PVB Resin. The grade is prepared by acid-catalyzed condensation of polyvinyl alcohol with n-butyraldehyde, producing a polymer chain that retains residual hydroxyl groups, residual acetate groups, and cyclic acetal rings. The distribution of these groups, together with molecular weight, controls solubility, adhesion, and rheological behavior. B06SY is positioned as a low-viscosity, solvent-borne grade for coating, ink, and binder applications rather than as an extrusion-grade interlayer polymer. The typical physical form is a white free-flowing powder with nonvolatile content above 98.0 wt% when tested according to ISO 3251; ash content is controlled below 0.2 wt% by ISO 3451-1. Residual hydroxyl content, expressed as polyvinyl alcohol, generally falls in the 15–22 wt% range for this grade class, and residual acetate is usually maintained below 3.0 wt%. Because the manufacturer’s published certificate of analysis for B06SY is lot-dependent, current batch-specific values should be obtained before final formulation qualification. The low-viscosity profile is the principal technical difference from interlayer-grade PVB, which is typically produced at weight-average molar masses above 2×105 g/mol; B06SY-class resins for solvent-borne applications are generally below 1×105 g/mol, although published exact values for every production lot are limited.
In a 10 wt% solids preparation, B06SY is prewetted with the alcohol-rich portion of the solvent blend before the aromatic or ester diluent is added. A Cowles-type high-speed disperser is operated at a tip speed of 6–10 m/s for 30–45 min. Preferred solvent blends include 60:40 ethanol:toluene and 70:20:10 ethanol:ethyl acetate:n-butanol. Solution temperature is maintained below 40 °C to prevent solvent loss and color development. If the powder has been stored at relative humidity above 60%, pre-drying at 40 °C for 2 h is required to avoid translucent gels and undissolved resin tails. Filtration through 5–10 µm depth filter cartridges removes residual gel bodies and incidental fiber contamination. Rotational viscosity is checked at 20 s−1 and 100 s−1; a ratio above 1.5 between the lower-shear and higher-shear readings indicates incomplete dissolution or particulate binding. The resulting solution should be stored in closed stainless or epoxy-lined steel vessels because water absorption from humid air can cause slow viscosity drift and haze formation. For gravure ink dilution, the solution may be letdown with ethyl acetate or n-propanol, but aromatic content should remain sufficient to hold the solvated acetal chains in extended conformation.
| Property | Typical acceptance or class range | Test method or condition |
|---|---|---|
| Nonvolatile content | ≥ 98.0 wt% | ISO 3251 |
| Ash content | ≤ 0.2 wt% | ISO 3451-1 |
| Residual hydroxyl, as polyvinyl alcohol | 15–22 wt% | Acetylation, adapted from ASTM E222-17 |
| Residual acetate | ≤ 3.0 wt% | Saponification method |
| Brookfield viscosity, 10 wt% in 60:40 ethanol:toluene, 25 °C | 20–60 mPa·s | ISO 2555 |
| Glass transition, second heating | 65–75 °C | ISO 11357-2, 10 K/min |
In gravure and flexographic ink formulations, B06SY is introduced at 5–15 wt% of total formulation solids as a cohesive binder and pigment-wetting resin. The grade is compatible with commercial 1/4-second nitrocellulose, ketone-soluble polyurethane, and alcohol-soluble rosin-modified phenolic resins; the specific co-binder ratio is adjusted to maintain dry film adhesion on corona-treated biaxially oriented polypropylene and polyester. Corona discharge is controlled to a wetting tension of 38–42 mN/m by ASTM D2578-99. In a high-opacity white ink, pigment dispersion is performed on a bead mill or three-roll mill with a grind gauge reading below 5 µm per ISO 1524. The low solution viscosity of B06SY permits higher pigment loading than higher-molecular-weight PVB homologues at equivalent press-ready viscosity. The dry film exhibits solvent release comparable to nitrocellulose-based systems: forced-air drying at 60 °C for 30 s commonly leaves residual solvent below 2 wt% in laboratory drawdowns, but production-scale tunnel profiles must be validated by gas chromatographic headspace analysis. Printing ink formulations using B06SY should avoid additives that generate free amine species because amine-catalyzed acetal hydrolysis can reduce viscosity stability during ambient storage.
Two-component wash primers based on B06SY are prepared by dissolving the resin in an alcohol/aromatic solvent phase and adding a phosphoric acid activator just before spray application. The acid component is typically charged at 2–5 wt% of the total liquid formulation, producing a pH below 3.0. This acid level promotes wet adhesion to degreased aluminium and steel but limits pot life because acid-catalyzed acetal hydrolysis proceeds slowly in the mixed primer. Basic additives that raise pH above 4.0 are incompatible with this activation mechanism and can cause premature viscosity loss or gel formation. Dry film thickness is controlled to 5–10 µm; excess film build can reduce cohesive strength and increase moisture retention. Cross-cut adhesion on degreased aluminium panels prepared with an alkaline metal cleaner is usually class 0–1 by ISO 2409, but published data for B06SY-containing wash primers are formulation-specific and must be generated on the actual substrate and pretreatment line. The coating is not a replacement for conversion coating or anodizing; it serves as a temporary adhesion-promoting interface prior to topcoating. Application at relative humidity above 70% may produce blushing and should be avoided unless the solvent balance is adjusted with a slower evaporating glycol ether.
Differential scanning calorimetry of unplasticized B06SY-class resin at 10 K/min under nitrogen shows a broad glass transition between 65 °C and 75 °C on the second heating scan when tested by ISO 11357-2. Incorporation of common ester plasticizers at 20–30 phr shifts the glass transition to 30–45 °C, depending on plasticizer molecular volume and compatibility. Thermogravimetric analysis at 10 K/min under nitrogen places the main-chain decomposition onset near 280 °C; in air, thermo-oxidative mass loss can begin near 240 °C. These boundaries are relevant to post-print film lamination and heat-seal operations. If residual moisture in the dried film exceeds 0.5 wt%, nip temperatures above 120 °C can produce pinholes and delamination. For extrusion lamination with low-density polyethylene at melt temperatures above 300 °C, contact time with the PVB-bearing film must be limited because local thermal oxidation can discolor the print and reduce adhesion. B06SY itself lacks antioxidant protection; formulations intended for thermal exposure should include a hindered phenolic antioxidant at 0.1–0.3 wt% of total solids, provided that migration limits for the intended packaging use are confirmed under the applicable food-contact regulation.
When the resin is evaluated as a nonaqueous tape-casting binder, B06SY is dissolved in 65:35 ethanol:toluene or 50:40:10 ethanol:methyl ethyl ketone:n-butanol. The solution is combined with ceramic powder, dispersant, and plasticizer to a total slurry solids loading of 50–60 wt%. Slurry viscosity is typically adjusted to 2–8 Pa·s at 10 s−1 on a cone-and-plate rheometer. The low-viscosity profile of B06SY permits higher solids than ethyl cellulose at equivalent tape-casting viscosity, which reduces drying shrinkage and shortens forced-air drying times. Tape is cast onto a silicone-coated polyester carrier with a doctor blade gap of 150–300 µm. Binder burnout is performed in air with a ramp of 0.5–1 K/min to 600 °C, followed by a hold of 1–2 h. The ash content below 0.2 wt% is significant for electronic-ceramic applications where residual carbon or inorganic ash can alter dielectric performance. Published data for the burnout profile of this specific B06SY grade in a particular ceramic matrix are limited; therefore, thermogravimetric analysis of the green tape formulation is necessary before kiln scale-up.
For differentiation against high-hydroxyl PVB homologues, B06SY is best characterized by its solution rheology and application intent. High-hydroxyl PVB grades used in safety-glass interlayer display higher hydrogen-bonding density, higher moisture uptake, and higher melt viscosity, and they are normally plasticized and extruded rather than dissolved into solvent-borne binders. In contrast, B06SY is supplied for solvent application where film formation occurs by solvent evaporation. The table below summarizes representative class-level differences. Exact numerical values for a specific homolog should be obtained from the supplier certificate of analysis, because interlayer-grade PVB is frequently tailed to a narrower residual-hydroxyl specification than solvent-borne coating grades.
| Characteristic | B06SY low-viscosity class | High-hydroxyl interlayer class |
|---|---|---|
| Solution viscosity at 10 wt% in 60:40 ethanol:toluene, 25 °C | 20–60 mPa·s | Often 200–800 mPa·s or higher; exact value depends on plasticizer-free grade |
| Residual hydroxyl, as polyvinyl alcohol | 15–22 wt% | Commonly 18–26 wt% |
| Residual acetate | ≤ 3.0 wt% | ≤ 5.0 wt% in many commercial grades |
| Principal forming method | Solvent-borne solution coating or casting | Plasticized sheet extrusion |
| Adhesion mechanism | Solvent-borne polar adhesion to metals, corona-treated films, and ceramics | Hydrogen-bond adhesion to glass and polyvinyl butyral interlayer surfaces |
| Moisture sensitivity | Moderate; pre-drying required at RH > 60% | Higher; interlayer packaging and storage humidity are tightly controlled |
