Sodium Chloride → Sodium prop-2-enoate--ethenyl acetate (1/1/1)

A (vinyl acetate-sodium acrylate) copolymer water-in-oil emulsion was prepared according to the following procedures: An aqueous solution was prepared by mixing, under cooling conditions, 96.49 gm of acrylic acid, 163.75 gm of water, 130 gm of a 40 percent sodium hydroxide solution and 0.02 gm of ethylenediamine tetraacetic acid. Separately, an oil solution was prepared by mixing 5.8 gm of Span-80, 113.3 gm of Isopar-M and 6.5 gm of vinyl acetate. The two solutions were combined in a high speed waring blender to give a uniform emulsion. A catalyst solution was prepared by dissolving 0.26 gm of 2,2'-azobis(isobutyronitrile) in 3.13 ml of acetone. The monomer emulsion was then deoxygenated as described in Example 1. The polymerization was carried out in the manner as in Example 1, except that a one-liter pyrex glass reactor equipped as described in Example 1, was used. The product produced was a milky white emulsion containing about 24 percent by weight of the polymer. The polymer had an intrinsic viscosity of 4.2 dl/gm as measured in a one normal aqueous sodium chloride solution.

1. customAn aqueous solution was prepared
2. customSeparately, an oil solution was prepared
3. customto give a uniform emulsion
4. customA catalyst solution was prepared
5. customThe monomer emulsion was then deoxygenated
6. customequipped
7. customThe product produced
8. additioncontaining about 24 percent by weight of the polymer

ORD record

ord-9263bfa2359c4586878e94151cf95e67

Source dataset

uspto-grants-1984_11

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US04485209