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

HRID 1732833

반응식

HRID 1732833 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 one-hundred sixty-five grams of 37% aqueous formaldehyde, forty-five grams of water, eighty-nine grams of urea and one gram of melamine, adjusted to pH 9.3 and heated for one 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 one 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-4a040abd5cb64d3a9d77ef1ff16a1ac1
출처 데이터셋
uspto-grants-1980_12
특허 번호
US04239646

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