Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1978-07-11
1981-01-06
Lieberman, Paul
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
525161, 525398, 525509, 528249, C08L 4500
Patent
active
042437806
ABSTRACT:
A method for preparing a carbamide-furan resin comprises reacting a urea-formaldehyde resin unlimitedly soluble in water with urea at a temperature within the range of from 50.degree. to 85.degree. C. and modifying the resulting urea-formaldehyde resin with furyl alcohol at a ratio therebetween expressed in parts by weight equal to 100:20-200 respectively at a temperature within the range of from 50.degree. to 85.degree. C., pH of from 7.2 to 8.9 simultaneously with dehydration of the product being modified under vacuum.
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Itkis Zolya Y.
Koposov Valery V.
Kruglikov Anatoly A.
Nikolaeva Militina A.
Shirinkin Vladimir A.
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