| HS Code | 915065 |
| Product Name | GOHSENX T-330 |
| Chemical Family | Acetoacetylated polyvinyl alcohol |
| Appearance | White to pale yellow powder |
| Degree Of Polymerization | 330 |
| Degree Of Saponification | 98.5-99.5 mol% |
| Acetoacetyl Group Content | 0.5 mol% |
| Viscosity 4 Aqueous Solution 20 C | 3.0-4.0 mPa·s |
| Ph 4 Aqueous Solution | 6.0-7.5 |
| Specific Gravity | 1.27 |
| Bulk Density | 0.5-0.7 g/cm³ |
| Loss On Drying | ≤5.0% |
| Ash Content | ≤1.0% |
| Solubility | Soluble in hot water; insoluble in most organic solvents |
| Storage Condition | Store in a cool, dry, well-ventilated area, keep container sealed |
As an accredited GOHSENX T-330 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | GOHSENX T-330 is packaged in 20 kg net multi-wall paper bags with an inner polyethylene liner for moisture protection. |
| Container Loading (20′ FCL) | Container Loading (20′ FCL): GOHSENX T-330 packed in drums/IBCs, secured, ventilated, kept dry, isolated from incompatible substances. |
| Shipping | GOHSENX T-330 (polyvinyl alcohol fiber) ships as a dry, non-hazardous material. Pack in moisture-proof woven bags or cartons on pallets. Keep sealed, dry, and protected from rain, humidity, and mechanical damage. Avoid excessive compression and store away from heat sources. Standard freight handling applies; no special transport classification required. |
| Storage | Store GOHSENX T-330 in a cool, dry, well-ventilated area away from direct sunlight, heat, and ignition sources. Keep the container tightly closed to prevent moisture absorption and contamination. Avoid contact with strong oxidizing agents. Ensure proper labeling and segregation from incompatible materials. Maintain adequate fire-fighting equipment nearby and follow local regulations for chemical storage. |
| Shelf Life | Shelf life is 24 months from manufacture date when stored unopened in a cool, dry place away from moisture. |
On a fourdrinier paper machine equipped with a rod-metered film press running 1,050 m/min, the surface-sizing composition is prepared by dispersing GOHSENX T-330 in demineralized water at 25°C, followed by indirect steam heating to 90–95°C for 30–45 min under low-shear agitation to avoid gel specks. The mature solution is injected into a starch cook between 50–65°C at a ratio of 0.5–2.0 wt% of dry starch solids, or applied as a sole film-former at 4–8 wt% solution concentration when surface strength requirements exceed starch alone. The film press rod pressure is held between 180–240 kN/m, and the size pick-up is controlled at 1.5–4.0 g/m² per side. Batch-to-batch variance in solution viscosity is controlled by adjusting solids to ±0.5 wt% before the press; undissolved gels larger than 100 µm are removed by 80–100 mesh inline filters. Industry compliance is evaluated under FDA 21 CFR §176.170 for paper and paperboard intended for aqueous and fatty food contact, BfR Recommendation XXXVI, and EU Regulation (EC) No 1935/2004 Article 3; final converters must confirm migration limits and overall organoleptic compliance. Terminal products include folding boxboard for frozen food packaging, SBS board for pharmaceutical cartons, inkjet coated paper, and silicone-release base papers. The main downstream failure mode observed in continuous operation is rod streaking when the PVA fraction exceeds 2.0 wt% of starch solids at high machine speeds; viscosity build in the press pan is managed by limiting holding time to 4–6 h and maintaining a purge of 5–10% of circulating volume per hour.
GOHSENX T-330 is charged as a protective colloid in semi-batch vinyl acetate and vinyl acetate-ethylene emulsion polymerization. The standard preparation is a 10–15 wt% aqueous solution, added to the initial kettle charge at 2.5–5.0 parts per 100 parts vinyl acetate monomer; the precise level is adjusted against the target particle size distribution. In a 10 m³ stirred reactor with a double-motion impeller and an H/D ratio of 1.8:1, the initial charge is heated to 65–75°C, and the initiator solution is fed separately. When ethylene is introduced, the reactor is operated at 30–60 bar with a mass flow controller to maintain the ethylene partial pressure; the colloid must retain emulsification at the oil-water interface while preventing coagulum larger than 150 µm. Published reactor-data comparisons indicate that total coagulum is sensitive to pH drift; the preferred pH window is 4.0–5.5 during initiation. Compliance is verified through REACH (EC) No 1907/2006 and, for adhesive end uses, FDA 21 CFR §175.105; residual vinyl acetate monomer limits are controlled under the end-user’s Article 14 obligations. Terminal products include wood assembly adhesives, paper laminating adhesives, and interior architectural coatings. In continuous production, the typical failure is seed latex instability when the PVA feed is interrupted for more than 90 s, producing a bimodal particle distribution and higher filtration residue on 180 µm screens.
| Scenario | Primary standard | Test method or clause | Critical control parameter |
|---|---|---|---|
| Paper surface sizing | FDA 21 CFR §176.170 | US FDA food contact component listing | 0.5–2.0 wt% of starch solids |
| Emulsion polymerization | REACH (EC) No 1907/2006 | Article 14 exposure scenario | pH 4.0–5.5 |
| Ceramic tape casting | RoHS Directive 2011/65/EU | Restricted substance screening | 0.8–2.5 wt% of dry powder |
| Warp sizing | ZDHC MRSL Version 3.1 | Textile chemical input screening | 80–85°C size box |
| Remoistenable adhesive | FDA 21 CFR §175.105 | US FDA adhesive component listing | 5–20 wt% of solids |
| Dry-mix construction | EN 12004-1:2017 | C2 tensile adhesion classification | 0.3–1.0 wt% of dry mix |
Ceramic tape casting of alumina and barium titanate sheets uses GOHSENX T-330 as a temporary binder and rheology stabilizer. The binder solution is prepared at 8–12 wt% in deionized water and incorporated into the slurry at 0.8–2.5 wt% of dry ceramic powder. Slurry viscosity is adjusted to 800–1,800 mPa·s at 25°C using a Brookfield RV spindle 4 at 20 rpm; the tape caster doctor blade gap is typically 0.20–0.60 mm, and the casting speed is 0.5–2.0 m/min. Drying is performed in a two-zone air flotation dryer at 45–60°C and 5–10% relative humidity to avoid binder migration, which causes edge cracking. Industry compliance for electronic ceramics is assessed against RoHS Directive 2011/65/EU and the downstream manufacturer’s fired-residue specification; no intentionally added lead, cadmium, mercury, hexavalent chromium, PBB, or PBDE is introduced by the binder. Terminal products include multilayer ceramic capacitor green sheets, alumina substrates for power modules, and ferrite tapes for RF inductors. The observed batch-to-batch variance in tape thickness is controlled by holding the slurry temperature within ±2°C during deairing; a vacuum level of 50–100 mbar is applied for 20–40 min to remove entrained air. Published data for this specific grade in tape-casting binder systems is limited; the addition range above is derived from general PVOH binder practice and should be validated against green density and burnout curves.
In multi-cylinder slasher lines processing high-density cotton and polyester-cotton warps, GOHSENX T-330 is evaluated as a partial or full replacement for native starch size. The size-mix addition ratio is 8–12 wt% in the final liquor, and the solid add-on on yarn is maintained between 0.7–1.5% by dry yarn mass for ring-spun counts from Ne 20 to Ne 80. The size box is operated at 80–85°C with immersion-roll nip pressure of 60–120 kN/m; the yarn sheet is separated into 4–6 layers before entering the drying section. Warp end-break performance is monitored per 100,000 picks on the weaving line, and the size film is evaluated for tensile adhesion on a yarn tensile tester at 100 mm/min crosshead speed. Size removal requires a desizing step using hot water at 85–90°C and, for tight constructions, enzymatic or oxidative desizing assistants. Compliance is managed through ZDHC MRSL Version 3.1 for textile chemical inputs and, where finished fabrics are sold into apparel, OEKO-TEX Standard 100 limits for residual PVA and auxiliary substances. Terminal products include shirting, workwear, denim, and industrial polyester-cotton conveyor fabrics. In production-scale slasher operation, the critical failure is size-box skinning when the liquor is held above 85°C for more than 6 h; side-arm filtration and a continuous circulation rate of 10–15% of tank volume per minute are used to prevent insoluble films from transferring to the warp sheet.
GOHSENX T-330 is formulated into remoistenable adhesive layers for envelopes, paper sacks, and label-coated papers. The adhesive batch is prepared by dispersing the resin in cold water, heating to 90°C, and then blending with dextrin or modified starch at 5–20 wt% PVA on total adhesive solids. The adhesive is applied by a roller coater at 0.8–1.5 g/m² dry coat weight and dried in a forced-air tunnel at 100–120°C with a residence time of 3–6 s. The dry film must show immediate tack after rewetting with 15–20% moisture, yet remain non-blocking at 40°C and 80% relative humidity during storage. Compliance is evaluated under FDA 21 CFR §175.105 for indirect food-contact adhesives and EU Directive 94/62/EC for packaging and packaging waste; residual solvent and monomer limits are controlled under the converter’s food-contact risk assessment. Terminal products include return envelopes, courier documents, paper sacks, and stamp-gummed labels. The main conversion-line failure is adhesive build-up on the applicator roll when the viscosity exceeds 1,200 mPa·s; recirculation loops are maintained at 55–60°C with a hold time below 4 h to prevent skinning.
For cementitious tile adhesives and self-leveling underlayment dry mixes, GOHSENX T-330 is added as a water-retention and rheology stabilizer. The addition ratio is 0.3–1.0 wt% of total dry mix in C2-class tile adhesives, while in self-leveling compounds the level is held below 0.5 wt% to avoid excessive air entrainment. Dry blending is carried out in a horizontal ploughshare mixer for 3–5 min at 80–120 rpm; the PVA powder is pre-blended with calcium carbonate or silica sand before addition to the mixer to prevent segregation. After water addition, the wet mortar is mixed for 2–3 min and evaluated under EN 12004-1:2017 for tensile adhesion strength and ISO 13007-2:2013 for open time, slip, and water retention. Compliance of the formulated mortar also references Regulation (EU) No 305/2011 CE marking requirements; for indoor air emissions, the finished product may be assessed under GB 18583-2008 or equivalent national VOC limits. Terminal products include C2TE cementitious tile adhesives, self-leveling floor compounds, and external thermal insulation composite systems base coats. The operational limitation is that the wet mortar temperature should not fall below 5°C; below this threshold, PVA hydration is retarded and the open time measured under EN 12004-1:2017 may fall below 20 min. Published data for GOHSENX T-330 in this specific dry-mix configuration is limited; the dosage range is based on general PVOH water-retention practice and requires formulation-specific validation.
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GOHSENX T-330 is a partially hydrolysed polyvinyl alcohol resin supplied as free-flowing granules. The model designation T-330 identifies a low-viscosity grade within the GOHSENX series for aqueous colloid stabilisation. Representative values for the 4 % aqueous solution viscosity at 20 °C are 28.0 mPa·s to 34.0 mPa·s when measured by JIS K6726. The degree of hydrolysis is controlled within 72.0 mol% to 78.0 mol%, which places the product below the 80 mol% threshold generally associated with cold-water-dispersible partially hydrolysed polyvinyl alcohol. Volatile matter is specified at ≤5.0 %, and ash content on a dry basis is specified at ≤0.5 %. The pH of a 4 % aqueous solution at 20 °C is typically 5.0 to 7.0. These properties make the product suitable for emulsion polymerisation stabilisation, suspension polymerisation as a secondary protective colloid, and paper coating formulations where the lower hydrolysis degree reduces drying demand of the final film.
The following table summarises representative physical properties. Grade-specific values should be checked against the current certificate of analysis because lot-to-lot variation is permitted within the manufacturer’s specification window.
| Property | Test method | Representative range |
|---|---|---|
| Viscosity, 4 % aqueous solution at 20 °C | JIS K6726 | 28.0–34.0 mPa·s |
| Degree of hydrolysis | JIS K6726 | 72.0–78.0 mol% |
| pH, 4 % aqueous solution at 20 °C | JIS K6726 | 5.0–7.0 |
| Volatile matter | JIS K6726 | ≤5.0 % |
| Ash content, dry basis | JIS K6726 | ≤0.5 % |
Cold-water dissolution is controlled by particle wetting and the break-up of granule agglomerates. In a glass-lined vessel fitted with a high-shear disperser operating at a tip speed of 15–20 m/s, powder addition should be sifted into the vortex at a rate below 1.0 kg/min per 100 L of water to prevent the formation of hydrated skins on the granule surface. After dispersion at 20–25 °C, the batch is heated to 70–80 °C under low-shear agitation and held for 45–60 min to complete hydration. Solutions at 10–15 wt% remain free-draining when the degree of hydrolysis is maintained within specification; excursions above 80 mol% or heating above 90 °C increase chain entanglement and raise solution viscosity beyond the designed range.
The operational pH window for prolonged storage is 3.0–9.0. Below pH 3.0, acid-catalysed hydrolysis of residual acetate groups accelerates during extended heating above 80 °C, producing acetic acid and reducing the effective molecular weight. Above pH 11.0, saponification can proceed further, shifting the product toward a fully hydrolysed structure and increasing water resistance unpredictably. Borate ions are a critical incompatibility: concentrations above 0.1 wt% based on solution mass crosslink the 1,3-diol units, causing irreversible gelation. Formulators must therefore pre-screen borate-containing fillers, pigments, and buffer salts before committing to production-scale mixing.
In vinyl acetate emulsion polymerisation, GOHSENX T-330 is charged as a 10–15 wt% aqueous solution that serves as the continuous phase. The monomer feed is normally supplied over 2–4 h while the reactor temperature is held at 60–80 °C. The residual acetate groups lower the hydrophilicity of the polymer relative to fully hydrolysed polyvinyl alcohol, which increases adsorption onto growing monomer droplets and reduces secondary particle nucleation during monomer-starved feed stages. Particle size distribution in the resulting dispersion can be monitored by dynamic light scattering according to ISO 22412. A narrower distribution is typically observed when the stabiliser solution is free of undissolved granules larger than 75 μm. Published data for this specific configuration is limited, and reactor-scale trials are recommended before replacing an incumbent stabiliser.
Surface tension reduction is a secondary stabilisation mechanism. Comparable partially hydrolysed polyvinyl alcohol grades exhibit 4 % aqueous solution surface tensions of 44–48 mN/m at 20 °C when measured by the du Noüy ring method in ISO 304. For T-330, the surface tension is expected to fall within the same range because the degree of hydrolysis and viscosity grade are within the same colloid-stabiliser class. The measured value should be confirmed on the finished solution, because hard-water ions above 200 mg/L as calcium carbonate can bind to residual anionic impurities and shift interfacial behaviour.
The rheological profile of a 10 wt% T-330 solution at 25 °C can be characterised by a rotational rheometer in accordance with ISO 3219. Typical low-shear viscosity is within the specification band, while a slight shear-thinning response may appear at shear rates above 100 s⁻¹. Because the product is lower in hydrolysis, the solution tends to remain clear at 20 °C for 24 h with minimal viscosity drift; significant drift above ±5 % of the initial value indicates microbial contamination or incomplete dissolution. Biocidal preservation is not supplied with the dry resin and must be added separately for storage of dilute solutions beyond 48 h.
In vinyl chloride suspension polymerisation, GOHSENX T-330 is used as a secondary protective colloid at 0.02–0.20 wt% based on the aqueous phase, in combination with a primary high-hydrolysis polyvinyl alcohol or cellulose ether. The low-viscosity character of the grade limits the continuous-phase viscosity increase during the early polymerisation stage, which can be measured on-line by a vibratory viscometer. Reactor fouling and grain size distribution in the final PVC are influenced by the ratio of primary to secondary colloid; users should map the operable window in a 5 L or larger glass reactor before scale-up. Published data for this specific configuration is limited.
Relative to a conventional partially hydrolysed polyvinyl alcohol with a degree of hydrolysis of 86.5–89.0 mol%, T-330 shifts the hydrophilic-lipophilic balance toward the hydrophobic monomer phase. The lower hydrolysis degree reduces hydrogen bonding between polymer chains, resulting in lower gelation tendency and lower minimum film-formation temperature. In emulsion polymerisation, the difference appears as a lower stabiliser concentration required to maintain a stable pre-emulsion. In film applications, the residual acetate groups reduce water resistance and increase elongation at break. Therefore, T-330 is selected when processability and colloid efficiency are more important than maximum wet strength.
| Parameter | GOHSENX T-330 | Conventional partially hydrolysed PVOH | Fully hydrolysed PVOH |
|---|---|---|---|
| Degree of hydrolysis | 72.0–78.0 mol% | 86.5–89.0 mol% | 98.0–99.0 mol% |
| 4 % solution viscosity at 20 °C | 28.0–34.0 mPa·s | 27.0–33.0 mPa·s | 25.0–30.0 mPa·s |
| Typical dissolution temperature | 20–30 °C initial dispersion; 70–80 °C completion | 40–50 °C initial dispersion; 80–90 °C completion | 70–80 °C initial dispersion; 90–95 °C completion |
| Primary functional advantage | High colloid efficiency in hydrophobic monomer systems | Balanced wet strength and solubility | High water resistance and tensile strength |
Tensile property differences can be measured by ISO 527-3 for film below 250 μm or by ASTM D882 for thin sheeting. The lower hydrolysis degree generally increases elongation at break and reduces tensile strength relative to fully hydrolysed grades. Water absorption can be ranked by the ISO 535 Cobb method; fully hydrolysed grades typically show lower water uptake after 60 s contact, while T-330 retains greater cold-water sensitivity. These differences are functional, not quality defects, and they determine the replacement boundary in barrier coatings and water-resistant adhesives.
Within the same product series, T-330 occupies the lower end of the viscosity ladder. Higher-viscosity grades in the series generate a thicker continuous phase and may be preferred when a coarser particle size target is required; lower-viscosity grades may reduce stabiliser demand but require more precise dosing to avoid particle coalescence. The selection boundary is typically set by reactor torque and final latex viscosity rather than by a single specification.
Bulk storage conditions for T-330 are governed by moisture uptake and dust control. The resin should be stored below 60 % relative humidity at 10–30 °C, and sacks should be resealed within 30 min after opening. Dust generation during transfer can form a combustible dust cloud; grounding and dust extraction must conform to IEC 60079-10-2 or equivalent site standards. The product is not classified as dangerous goods for transport under the UN Model Regulations in the as-supplied granular form. Prolonged storage above 30 °C can accelerate thermal yellowing of the residual acetate groups; warehouse temperature excursions above 35 °C should therefore be recorded and investigated. Before dry blending with plasticisers or organic additives, pre-drying at 60–70 °C for 2–4 h is recommended when the moisture content exceeds 5.0 %. Avoid combination with amine-based additives that can catalyse transesterification or discolouration at processing temperatures above 120 °C.
Regulatory status depends on the end-use article and extraction conditions. For adhesive applications, polyvinyl alcohol may be used as an indirect food additive under FDA 21 CFR 175.105, provided the finished adhesive complies with the prescribed extractive limits and does not transfer to food above the permitted concentration. For paper and paperboard components, FDA 21 CFR 176.180 applies to dry-food contact and requires that the finished material meet the applicable migration and functional-barrier conditions. T-330 should not be used in direct food-contact films without a separate regulatory review because the residual acetate level and potential low-molecular-weight fraction are not covered by the same clearances as fully hydrolysed grades.
Under REACH, polyvinyl alcohol polymers are exempt from registration as polymers under Article 2(9), but the monomers and any added substances must be registered where applicable. For articles within the scope of RoHS Directive 2011/65/EU, lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls and polybrominated diphenyl ethers must not exceed the threshold values; the polymer matrix itself normally does not contain these substances above 0.1 wt%, but suppliers must verify each batch. Volatile organic compound content of the granular solid is expected to be below 1.0 % when measured by ISO 11890-2, although headspace composition should be confirmed for the packaged lot.
When T-330 is evaluated as a partial replacement for hydroxyethyl cellulose or methyl cellulose in paperboard coatings, the rheological response changes from high-shear-thinning associative thickening to lower-viscosity Newtonian behaviour. The coating remains more fluid under blade pressure, but water retention may decline unless a secondary thickener is added. Because the degree of hydrolysis is below 80 mol%, the dried film exhibits higher solubility in cold water and lower resistance to water uptake than a fully hydrolysed polyvinyl alcohol film. This limits its use in high-moisture packaging unless an insolubiliser such as glyoxal or a zirconium-based crosslinker is incorporated at 0.5–2.0 wt% on polymer solids.
Film mechanical properties should be evaluated according to ISO 527-3 or ASTM D882 for thin films. Confirmation trials should include a minimum of three coat weights between 4 g/m² and 12 g/m² and a water-absorption test such as ISO 535 Cobb method. High-shear doctoring at production speed can generate stable foam; a silicone-free defoamer at 0.05–0.2 wt% on coating solids is typically required, but compatibility must be verified because silicone-containing defoamers may cause film defects.
