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Powder Details
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VA5088
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VA5088 - Polyvinyl Alcohol
VA5088 is a unique, medium viscosity, copolymer grade of polyvinyl alcohol. Its unique structure imparts improved viscosity stability and gel resistance to aqueous solutions while maintaining excellent film properties and adhesive strength typical of fully hydrolyzed grades.
Typical Properties of VA5088
Viscosity, cps1 24.0-32.0, Viscosity in mPa.s (cP) of a 4% solids aqueous solution at 20°C (68°F)
Solution, pH 5.0-7.0
Volatiles, wt. % max. 5.0
Ash, wt. % max.2 0.70, Dry basis, calculated as % Na2O
Resin Characteristics
As illustrated in following Table, solutions of VA5088 have less tendency to increase in viscosity on storage than solutions of other grades. Solutions of VA5088 are also more resistant to temperature changes. They show less tendency to develop gel structure on storage below room temperature or during extended storage, even at higher solids concentrations.
Viscosity Stability Aqueous Solutions
| Viscosity Room Temp., mPa.s (cP) | | - | 1 Day | 10 Days | | 12% VA5088 | 2535 | 2665 | | 12% regular, medium viscosity fully hydrolyzed PVA | 2475 | 3200 |
Suggested Uses
VA508885- 82 is suggested for evaluation wherever the high film strength and oil, grease and solvent resistance associated with fully hydrolyzed polyvinyl alcohol are required but gel resistance is needed. The viscosity stability and gel resistance make it attractive for use in wet adhesives that must withstand temperature variations in shipment. Improved storage stability is possible for compounded adhesives containing VA5088.
FDA Status
VA5088 polyvinyl alcohol complies with U.S. Food and Drug Administration (FDA) Regulations under the following Sections of Title 21 CFR, and may be used in contact with food, subject to the limitations and requirements therein: · 175.105 - Adhesives
Safety & Handling
Read and understand the Materials Safety Data Sheet (MSDS) before using this product. VA5088is technical quality polyvinyl alcohol. It is not recommended for inclusion in any food or preparation that might be taken internally.
Under certain conditions of use, dust may be formed from VA5088 polyvinyl alcohol. We recommends that dust from VA5088be treated as a nuisance dust, which is regulated by the Occupational Safety and Health Administration (OSHA) under Title 29, Code of Federal Regulations, Section 1910.1000. Under this section, an employee’s exposure to nuisance dust shall be limited to 15 milligrams per cubic meter (mg/m3) of total dust and 5 mg/m3 of respirable dust on a time-weighted average in any 8-hour shift of a 40-hour w eek. The limit for polyvinyl alcohol exposure to nuisance dust is 10 mg/m3, and for respirable dust is 5 mg/m3. If excessive concentrations of dust are encountered, a mask or respirator and goggles should be worn. The mask or respirator should comply with Section 1910.134 of the OSHA regulations; the goggles should comply with Section 1910.133. For bulk storage and handling of VA5088(e.g. storage silos) refer to VA5088Bulk Storage and Handling Safety Guide. VA5088may be disposed of by incineration or landfill. However, any disposal method must be in compliance with all applicable local, state and federal regulations. |
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