Oligodendrogliopathy for manufacturing sealing compositions, molded articles and chemically resistant coatings

 

(57) Abstract:

Use: for the manufacture of sealing compositions, molded articles and chemically resistant coatings. The inventive isocyanate component has the structural formula OCN-C4H6-COONHR-CONH-R-CONH-C(CH3)2-(R)n-C(CH3)2-CONH-R-COONH-C4H6-NCO, where R is a C4H6- or-C5H8; R-C2H4- or-C3H6-, n = 10 - 70, for the manufacture of sealing compositions, molded articles and chemically resistant coatings. Get society component of the specified structure by processing diene oligomers with terminal aminohydrocinnamic groups 2 - 4-fold molar excess of diisocyanate in the mass or in the environment of an organic solvent at 40 - 80C for 30 - 180 minutes 1 table.

The invention relates to the chemistry of polymers, namely, oligomers containing terminal isocyanate groups.

Known oligoanuria with terminal isocyanate groups of the General formula:

OCN-Ar-NHCOO-R-NHCOO-Ar-NCO, where R is Polivanova block (C4H6-) or (C5H8-),

Ar - (-C7H6-).

These oligodendrocyte get by amrabat.

The main drawback of the oligomers is low physico-mechanical properties of the elastomers obtained on their basis. Especially bad physico-mechanical characteristics are the elastomers obtained on the basis of these oligomers mol. m 3000-4000.

To eliminate this disadvantage allow oligomers, which are obtained by processing diene oligomers with terminal aminohydrocinnamic groups 2-4-fold molar excess of diisocyanate in the mass or in the environment of an organic solvent that does not contain active hydrogen atoms, with 40-80aboutC for 30-180 minutes

When this occurs the reaction of isocyanate and hydroxyl groups, which leads to the formation of oligomers containing in the chain aminoethanol and terminal isocyanate groups, of General formula:

OCN-Ar-COONH-RI-CONH-C(CH3)2-(R)n-C(CH3)2-CONH-RI-COONH-Ar-NCO,

where R - (-C4H6) or (C5H6-),

RI- (-C2H4-) or (C3H6-),

Ar - (-C7H6-),

n = 10-70.

The passage of this reaction is confirmed by the data of IR spectroscopy: a decrease of the absorption bands in the region 2240-2270 cm-1harai for hydroxyl (-OH) group, preservation of absorption bands in the region 1650-1680 cm-1typical amide (-NH-) group and the appearance of absorption bands in the area, 1735 cm-1owned by urethane (-NH-) group.

As the diene oligomers with terminal aminohydrocinnamic groups are oligomers of the following structure:

BUT-RI-NHCO-C(CH3)2-(R)n-C(CH3)2- CONH-RI-OH, where R - (-C4H6-) or (-C5H8-)

RI- (-C2H4-) or (-C5H6-)

n= 10-70.

As the diisocyanate and use toluylenediisocyanate brands T, KZT80/20 or Kzt65/35 General formula

OCN-C7H6-NCO.

P R I m e R 1. To 10.0 g of butadiene oligomer with terminal aminohydrocinnamic groups say. m (Mm) 1000 add 3,48 g of a mixture of 2,4 - and 2,6-toluylene diisocyanate in a ratio of 65/35 /Kzt65/35/. The components are stirred at 80aboutC for 30 minutes Get oligobutadienediol with terminal isocyanate groups, which maintains fluidity at room temperature in a tightly closed container for at least 3 months. The molar ratio of the components 1: 2, respectively. The content of NCO-groups 6,21% .

P R I m m e R 2. To 27,0 g of butadiene oligomer end with the isocyanate in a ratio of 80/20 /KZT80/201. The components are stirred at 40aboutWith over 180 minutes Receive a 90% solution of oligonucleotide with terminal isocyanate groups, which maintains fluidity at room temperature in a tightly closed container at least 9 months. The molar ratio of the components 1: 2, respectively. The content of NCO-groups - 2,47% .

P R I m e R 3. To 34,0 g of isoprene oligomer with terminal aminohydrocinnamic groups 3400 Mm, dissolved in 9,37 g of butyl acetate, add 3,48 g Kzt65/35. The components are stirred at 60aboutC for 60 minutes Receive 80% solution of oligozoospermia with terminal isocyanate groups, which maintains fluidity at room temperature in a tightly closed container at least 9 months. The molar ratio of the components 1: 2, respectively. The content of NCO-groups of 1.80% .

P R I m e R 4. To 40,0 g of butadiene oligomer with terminal aminohydrocinnamic groups 4000 Mm, dissolved in quintiles these figures were 19.63 g of dioxane, type of 3.48 g of 2,4-toluylene diisocyanate (T). The components are stirred at 50aboutWith over 1120 minutes Receive a 70% solution of oligobutadienediol with terminal isocyanate groups, which maintains fluidity at room temperature in a tightly closed container not IU the e oligodendrogliopathy otverzhdajutsja by the reaction with bi - or polyfunctional compounds, containing active hydrogen atoms. In particular, during curing of oligodiens synthesized in examples 1-4 equimolar amounts of 3,3I-dichloro-4,4I-diaminodiphenylmethane (diameter-x) were obtained transparent elastic film, physico-mechanical characteristics of which are given in the table in which to compare the physical-mechanical characteristics of the film obtained on the basis of oligodendrocyte (I) mol. m 3200.

Thus, as can be seen from table, the elastomers obtained on the basis of oligodeoxyribonucleotides by its physical-mechanical characteristics superior elastomers obtained on the basis of oligodienedihydrazides while retaining the resistance to a solution of 10% nitrogen, 50% sulfuric acid, 60% of phosphorus, 30% hydrochloric and 25% hydrofluoric acid, and alkali and salts of any of the concentrations.

(56) TU-38-103451-79.

Apukhtin N. P. and others Sat. proceedings of VNIIK, Uranovye elastomers. L. : Chemistry, 1971, S. 109.

Oligodendrogliopathy General formula

OCN-Ar-COONH-R'-CONH-C(CH3)2-(R)N-C(CH3)2-CONH-R' -COONH-Ar-NCO,

where R is-C4H6- or-C

 

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20 cl, 3 ex, 2 tbl

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22 cl, 4 ex, 8 tbl, 4 dwg

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26 cl, 14 ex, 2 tbl

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