Formaldehyde → Urea, polymer with formaldehyde and 1,3,5-triazine-2,4,6-triamine

HRID 371779

반응식

HRID 371779 반응식
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]

참가 물질

7

반응물 4

HCID 712FormaldehydeHCID 1119Sulfur DioxideHCID 1176UreaHCID 7955Melamine

생성물 1

HCID 168250Urea, polymer with formaldehyde and 1,3,5-triazine-2,4,6-triamine

시약·촉매·용매 2

HCID 962Water용매HCID 7237O-Xylene용매

반응 조건

온도
65 °C

실험 절차

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.

후처리

  1. customresulting in an exothermic reaction
  2. customWithout any preliminary phase separation
  3. additionthe product is mixed with water

출처 및 근거

ORD 기록
ord-112bde496d874acc9ee709703c6c59ac
출처 데이터셋
uspto-grants-1978_05
특허 번호
US04087581

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