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Main Parameter of Polyvinyl Acetate (PVAC) Granule

GB12498-90(07,001)

CAS [9003-20-7]

1.Chemical Performance

1.1 Molecular Structure

The Polyvinyl acetate, PVAC, is a rubbery synthetic polymer with the formula (C4H6O2)n. It belongs to the polyvinyl esters family with the general formula -[RCOOCHCH2]-. It is a type of thermoplastic.

1.2 Chemical Properties

The degree of polymerization of polyvinyl acetate typically is 100 to 5000. The ester groups of the polyvinyl acetate are sensitive for alkali and will slowly convert PVAC into polyvinyl alcohol and acetic acid.Under alkaline conditions, boron compounds, such as boric acid or borax causes the polymer to cross-link forming tackified precipitates or slime

1.3 Chemical Parameters

Viscosity (10%, 20C): 1.0-12.0

Molecular: 10,000 to 300,000

Soften Point: 58-110 C.

Free Acid (CH3COOH): ≤ 0.05%.

Volatilizer: ≤ 1.0%.

Lead (Pb): ≤ 1.0mg/kg.

Arsenic(As): ≤ 3.0mg/kg.

Heavy metal: ≤ 10mg/kg

2 Physical Performance

Status: Solid, Apparent granule

Density: 1.19g/cubic cm (25C)

Refractive Index: 1.467(20C),

Vitrification temperature: 30-40 degree

Thermal Deformation: 50 degree

Pulling Stress: 34Mpa

Permittivity: (103HZ) 1.15

Water Absording: 2%-5%

Boiling Point: 71.8-73 degree

Solubility: Soluble in methanol, ketones, esters, aromatics, chlorinated hydrocarbons, insoluble in ethanol, higher alcohols, alkanes, cyclohexane, water, etc.

Stability: Stable in sunshine and under 125℃, darkens at 150℃, deforms at 225℃, release acetic acid and brown resinous insoluble matter.

3. Product Scope：

PVAC with different Molecular weight acquired via strict control on polymerization, is supplied to different industries for specific applications.

Main Items：

Item	Appearance	Solid percentage	Viscosity[MPa.S] 10% Vinyl Ester Liquid [MPa.S]	Molecular weight Mol x 10³	Acid Remain MgKOH/g	Viscosity [MPa.S] 40% Styrene liquid	Soften point (^。C)	Glass Transit Temperature Tg (^。C)
YYpvac-1	Slice Granule	100%	1.2～3.5	20～55	＜0.5	～500	50～85	33±1
YYpvac-2	Slice Granule	100%	3.5～5.0	55～-80	＜0.5	～800	85～90	39±1
YYpvac-3	Slice Granule	100%	5.0～8.0	80～110	＜0.5	～1500	90～114	42±1
YYpvac-4	Granule	100%	8.0～11.0	110～150	＜0.5	～4000	114～124	43±1
YYpvac-5	Granule	100%	11.0～15.0	150～250	＜0.5	～5500	124～135	44±1
YYpvac-6	granule	100%	15.0～20.0	250～330	＜0.5	～25000	135～143	44±1
YYpvac-7	Granule	100%	20.0～25.0	330～420	＜0.5	～35000	143～152	44±1

4.Packing：（to customers' request）

20KG/Carton (5KG/poly bag) （Granules）

25KG/Kraft Bag （Slices）

20KG/Kraft Bag（Granules）

6.Advantages：

1. Molecular weight, Particle size, and Viscosity can be customized.

2. The solid substance in a form of tiny dispersive particles is rapidly dissolved in solvent.

3. Molecular weight ranges from 10,000 to 300,000 (Do).

4.With advanced technology of underwater granulation, our PVAC acquired a transparent appearance and excellent performance in high gloss.

5.The whole production is carried out under a strict control for food grade. The finished prodcut is eco-friendly and safe to use.