反応式
C=O.[NH2:3][C:4]([NH2:6])=[O:5].[N:7]1[C:14]([NH2:15])=[N:13][C:11]([NH2:12])=[N:10][C:8]=1[NH2:9].S(=O)=O>C1(C)C(C)=CC=CC=1.O>[CH2:4]=[O:5].[NH2:3][C:4]([NH2:6])=[O:5].[N:7]1[C:14]([NH2:15])=[N:13][C:11]([NH2:12])=[N:10][C:8]=1[NH2:9]参加物
反応条件
- 温度
- 65 °C
実験手順
A urea-formaldehyde-melamine prepolymer solution is prepared from 165 grams of 37% aqueous formaldehyde, 45 grams of water, 89 grams of urea and 1 gram of melamine, adjusted to pH 9.3 and heated for 1 hour at 65° C. One-hundred seventy grams of this prepolymer solution are emulsified in a solution of six grams of Tetronic 1502 dissolved in one-hundred grams of xylene, and 0.06 milliequivalents of sulfur dioxide (about 4 normal in xylene solution) is added, resulting in an exothermic reaction. After stirring for 1 hour, the solvent dispersion has little or no precipitate. Without any preliminary phase separation, the product is mixed with water to give about 16% total solids, and this "aqueous redispersion" is steam distilled under high-shear agitation to yield a product free of of residual xylene, closely resembling that described in Example 1. A paper coating prepared as described in Example 1 has a scatter coefficient of about 4,000 cm2 /gram.
後処理
- customresulting in an exothermic reaction
- customWithout any preliminary phase separation
- additionthe product is mixed with water
出典と根拠
- ORDレコード
- ord-112bde496d874acc9ee709703c6c59ac
- 出典データセット
- uspto-grants-1978_05
- 特許番号
- US04087581
関連ノート
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