Aqueous process for preparing water-resistant coatings of hydrophobic copolymers made from hydrophilic monomers
US4927667A · kind A · utility
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6Claims
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Key dates
| Filing date | Jun 22, 1989 |
| Grant date | May 22, 1990 |
| Priority date | — |
| Expiry date | Jun 22, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2339/06
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An aqueous process is described for preparing water-resistant coatings of hydrophobic copolymers of a predetermined composition. The hydrophobic copolymers are made from hydrophilic comonomers such as a vinyl lactam and a polymerizable carboxylic acid. The hydrophobic copolymers are rendered water soluble with a volatile neutralizing agent, such as ammonium hydroxide, then coated onto a substrate and heated to provide the water-resistant coating, and, if desired, redissolved in an aqueous alkaline solution.
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