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Acetic acid ethenylester, homopolymer (Acetic acid ethenylester, homopolymer)

Reference Price: ￥15000 YUAN/Ton 09-28 10:36 Update

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Acetic acid ethenylester, homopolymer

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poly(1-acetoxyethylene)

9003-20-7

(C4H6O2)x

Quzhou city, Zhejiang

Shanghai tiangeng Chemical Co., Ltd.

Quzhou Hansang Industry and Trade

2933990090

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Product Description

Nature Description

Polyvinyl acetate (9003-20-7) character:
??? 1. Colorless viscous liquid or light yellow transparent glassiness particles, odorless, tasteless, tough and plastic.
??? 2. Relative density d420 1.191
??? 3. Refractive index 1.45~1.47, softening point is about 38 ℃
??? 4. It cannot be mutually soluble with fat and water, and can be mutually soluble with ethanol, acetic acid, acetone and ethyl acetate. It is stable to light and heat, and acetic acid will be decomposed when heated above 250℃.
??? 5. Laboratory rat oral 10 g/kg without acute poisoning, 0~20 mg/kg (Shanghai).

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Product Applications

Use of polyvinyl acetate (9003-20-7): ??? This product is used as gum base material, the basic gum base of gum; The fruit coating agent can prevent water evaporation and play a role in preservation. It is stipulated in our country that it can be used for emulsion essence and gum sugar, and the maximum usage is 60 g/kg. Mainly used as paint, adhesive, paper, chewing gum base material and fabric finishing agent, also used as polyvinyl alcohol, vinyl acetate-Vinyl Chloride Copolymer, vinyl acetate-ethylene copolymer raw materials, also used to prepare coatings, adhesives, etc. It is also used to manufacture velvet toy and non-woven fabrics.

Production method

Production method of polyvinyl acetate (9003-20-7): ??? Preparation Method 1: In the presence of acetic acid, using benzoyl peroxide as initiator and vinyl acetate for bulk polymerization; Or using polyvinyl alcohol as dispersant, solution polymerization is carried out in the solvent at 70 ~ 90℃ for 2~6 hours (the degree of polymerization should be controlled at 250~600), then the product is obtained. ??? Preparation Method 2: It is formed by the polymerization of vinyl acetate in the presence of acetic acid. The polymerization degree is 250~600. After the polymerization is completed, the residual trace catalyst (usually peroxide) in the resin, the monomer and/or solvent are removed by vacuum drying, steam stripping, washing or combined treatment. Distinguishing test: ??? 1. Take 5g of sample, Add 10ml of ethanol, heat and dissolve it in water bath, add 20ml of 20% potassium hydroxide ethanol solution, and then heat it in water bath for 20min. Cool, filter, and wash the filter residue with ethanol for 3 times, 10ml each time. Add 10ml of hot water to the filter residue, stir, and form a paste. After burning and charring, acetaldehyde odor is produced. Combine filtrate and washing liquid, remove ethanol by vacuum distillation, add dilute sulfuric acid test solution (TS-241) to neutralize, evaporate to dryness in water bath, move into crucible, add 1G arsenous acid, heat, it should be produced by oxidation of tetramethyl arsenide with strong odor. ??? 2. The infrared spectrum shall conform to figure 14025. The sample was melted and prepared on the Caesium bromide plate. Toxicity: ??? 1. Used as gum chewing material, not into the human body, non-toxic. And because it is a polymer substance insoluble in water and oil, it cannot be absorbed by human body. ??? 2. A total of 30 days after 500 mg/kg oral administration in rats, cheese-like changes can occur in liver and myocardial cells. ??? 3. Safe for food (FDA, 172.615,2000). Quality Index analysis: ??? 1. Take 10.0g of free acetic acid sample, put it into a 250ml conical flask with glass plug, and add 75ml benzene to dissolve it. Add 60ml ethanol and mix. Add several drops of phenolphthalein test solution (TS-167) and titrate with 0.02mol/L potassium hydroxide methanol solution to the end of dark pink. At the same time, conduct blank test and make necessary correction. Each ml of 0.02 mg/kg potassium hydroxide methanol solution is equivalent to 1.201mg of acetic acid (C2H4O2). ??? 2. Take about 1.5g of volatile matter and measure it according to the GT-19 weight loss method. The conditions are vacuum drying at 100 °c for 2 hours. ??? 3. Molecular weight is carried out according to the molecular weight determination method in "Polyethylene (14023). The solvent is changed to acetone, and the temperature of thermostat is changed to 25℃. The K value in calculation is 1.88 × 10-4, and the c value is 0.69.

Security

Safety instructions： S24/25: prevent contact between skin and eyes.

Hazardous material category code： R23/25: toxic inhalation and accidental swallowing. R50/53: extremely toxic to aquatic organisms, which may lead to long-term adverse effects on aquatic environment.

Storage conditions： Storage and Transportation: it must be stored in a cool, dry environment with a temperature above 5 degrees Celsius, and the shelf life of tight cans is above 12 months. During storage and transportation, it should be handled lightly to prevent inversion, extrusion and exposure.