SU178101A1 - - Google Patents

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Publication number
SU178101A1
SU178101A1 SU928600A SU928600A SU178101A1 SU 178101 A1 SU178101 A1 SU 178101A1 SU 928600 A SU928600 A SU 928600A SU 928600 A SU928600 A SU 928600A SU 178101 A1 SU178101 A1 SU 178101A1
Authority
SU
USSR - Soviet Union
Prior art keywords
steam
polyureas
solvent
aromatic diamine
diisocyanate
Prior art date
Application number
SU928600A
Other languages
Russian (ru)
Publication of SU178101A1 publication Critical patent/SU178101A1/ru

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Description

Известно получение полимочевины взаимодействием в среде растворител  диизоцианатов и N-замещенного ароматического диамина (например, алкилзамещенного) с последующей обработкой реакционной смеси вод ным паром. Физико-механические свойства полимочевин , полученных таким образом, сравнительно низки.It is known to produce polyureas by the interaction of diisocyanates and an N-substituted aromatic diamine (e.g., alkyl substituted) in the solvent medium, followed by treatment of the reaction mixture with steam. The physicomechanical properties of the polyureas thus obtained are relatively low.

Предлагаемый способ заключаетс  в том, что диизоцианат подвергают взаимодействию с дицианэтилированным диамином в среде растворител  с последующей обработкой известными методами.The proposed method consists in that the diisocyanate is reacted with dicycanoethyl diamine in a solvent medium, followed by treatment with known methods.

Введение в полимочевину дицианэтильного заместител  придает полимеру ценные свойства, в частности, более высокую износостойкость и разрывную прочность.The introduction of a dicyanethyl substituent into the polyurea imparts valuable properties to the polymer, in particular, a higher wear resistance and tensile strength.

Пример. 5,0 г дицианэтилированного гексаметилендиамина , 5,6 г гексаметилендиизоцианата в 63 мл ацетона оставл ют сто ть в течение 1 час. Затем растворитель отгон ют паром, полимер отфильтровывают от воды и высушивают в вакууме. Выход около 95- ЮОо/о.Example. 5.0 g of dicyanoethylated hexamethylenediamine, 5.6 g of hexamethylene diisocyanate in 63 ml of acetone are left to stand for 1 hour. Then the solvent is distilled off with steam, the polymer is filtered off from water and dried under vacuum. Output about 95- UOo / o.

Из полученной мочевины изготавливают пленки вальцеванием при 70°С, из которых затем прессуют листы при 40°С и давлении 100 кг/см2.Films are produced from the obtained urea by rolling at 70 ° C, from which sheets are then pressed at 40 ° C and a pressure of 100 kg / cm2.

Механические Предел прочности при раст жении,Mechanical tensile strength at stretching,

200200

кгс/см2kgf / cm2

330330

Разрывное удлинение, /о Explosive lengthening, / about

15 Остаточное удлинение, % 15 Residual elongation,%

0,10 Твердость по , кгс/см 0.10 Hardness, kgf / cm

1,7 Износ по шкурке, мг/м Усталостна  прочность, число пере400 гибов1.7 Wear on skin, mg / m Fatigue strength, number over 400 bends

ДиэлектрическиеDielectric

Удельное поверхностное сопротив9 ,2- 10 ление, омSpecific surface resistivity9, 2-10 x, ohm

Удельное объемное сопротивление, Specific volume resistance

1,9-1012 ом см 0,051.9-1012 ohm cm 0.05

Тангенс угла диэлектрических потерьDielectric loss tangent

Диэлектрическа  проницаемость при Dielectric constant with

3,8 106 гц3.8 106 Hz

Среднее пробивное напр жение, кв/мл1Average breakdown voltage, kV / ml1

27,227.2

Предмет изобретени Subject invention

Способ получени  полимочевины взаимодействием в среде растворител  диизоцианата и N-замешемного ароматического диамина с последующей обработкой реакционной смеси вод ным паром, отличаюи ийс  тем, что, с целью улучшени  механических свойств полимочевины , в качестве N-замещенного ароматического диамина берут дицианэтилнрованный диамин.The method of producing polyureas by reacting the solvent of the diisocyanate and the N-blended aromatic diamine with the subsequent treatment of the reaction mixture with steam, is characterized in that, in order to improve the mechanical properties of the polyurea, it is taken as the N-substituted aromatic diamine.

SU928600A SU178101A1 (en)

Publications (1)

Publication Number Publication Date
SU178101A1 true SU178101A1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0187330A2 (en) * 1985-01-08 1986-07-16 Bayer Ag Stable dispersions of polyureas and/or polyhydrazodicarbonamides in higher molecular weight, at least on hydroxyl group containing hydroxylcompounds, a process for their preparation and their use in the preparation of polyurethane plastics

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0187330A2 (en) * 1985-01-08 1986-07-16 Bayer Ag Stable dispersions of polyureas and/or polyhydrazodicarbonamides in higher molecular weight, at least on hydroxyl group containing hydroxylcompounds, a process for their preparation and their use in the preparation of polyurethane plastics

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