SU197943A1 - METHOD OF OBTAINING POLYURETHANE - Google Patents
METHOD OF OBTAINING POLYURETHANEInfo
- Publication number
- SU197943A1 SU197943A1 SU1085669A SU1085669A SU197943A1 SU 197943 A1 SU197943 A1 SU 197943A1 SU 1085669 A SU1085669 A SU 1085669A SU 1085669 A SU1085669 A SU 1085669A SU 197943 A1 SU197943 A1 SU 197943A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- blocked
- catalysts
- obtaining polyurethane
- dissociation
- cresol
- Prior art date
Links
- 229920002635 polyurethane Polymers 0.000 title description 4
- 239000004814 polyurethane Substances 0.000 title description 4
- 239000003054 catalyst Substances 0.000 description 7
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Natural products OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 6
- 238000010494 dissociation reaction Methods 0.000 description 6
- 230000005593 dissociations Effects 0.000 description 6
- 239000000203 mixture Substances 0.000 description 4
- DVKJHBMWWAPEIU-UHFFFAOYSA-N Toluene diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 125000005442 diisocyanate group Chemical group 0.000 description 3
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 3
- 229920000728 polyester Polymers 0.000 description 3
- 229910052783 alkali metal Inorganic materials 0.000 description 2
- -1 alkali metal phenols Chemical class 0.000 description 2
- 150000004703 alkoxides Chemical class 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 150000002513 isocyanates Chemical class 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- RLSSMJSEOOYNOY-UHFFFAOYSA-N M-Cresol Chemical compound CC1=CC=CC(O)=C1 RLSSMJSEOOYNOY-UHFFFAOYSA-N 0.000 description 1
- QWVGKYWNOKOFNN-UHFFFAOYSA-N O-Cresol Chemical compound CC1=CC=CC=C1O QWVGKYWNOKOFNN-UHFFFAOYSA-N 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000003197 catalytic Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 229960004126 codeine Drugs 0.000 description 1
- 238000007334 copolymerization reaction Methods 0.000 description 1
- 150000001896 cresols Chemical class 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 150000002440 hydroxy compounds Chemical class 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000004922 lacquer Substances 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- NESLWCLHZZISNB-UHFFFAOYSA-M sodium phenolate Chemical class [Na+].[O-]C1=CC=CC=C1 NESLWCLHZZISNB-UHFFFAOYSA-M 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 230000002194 synthesizing Effects 0.000 description 1
- 230000002588 toxic Effects 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000035899 viability Effects 0.000 description 1
Description
Сиособы .иолучеии иолиуретанов известны . Вопросы использовани реакций иолиизоцианатов с иилигидроксильиыми соединени ми дл синтеза полиуретаиов широко освещены в литературе. При этом в качестве одного из реагентов пр имен ют весьма реакционноснособиый и облада1ош,ий достаточно высокой упругостью наров 2,4-толуилендиизоцианат. Но жизнеспособность полученных смесей (.после смеидени компонентов) низка, а диизоциапаты токсичны. Чтобы избавитьс от этих недостатков , замен ют легколетучие диизоцианаты иродуктами их реакций с соединени ми, содержащими активный водород. соединени называютс «скрытыми или блокированными диизоцианатами, которые используютс за рубежом в однокомпопеитных полиуретановых лаках. Блокированные диизоциаиаты при повышеиных температурах диссоциируют до свободного диизоциаиата. Снизнть температуру диссоциации с но.мощыо катализатора - N-метилморфолнна - удаетс лищь частично.The methods of ioliucheii ioliuretanov known. The issues of using reactions of iolisocyanates with or hydroxy compounds for the synthesis of polyurethia are widely reported in the literature. At the same time, as one of the reagents, a very reactive and very good elasticity of 2,4-toluene diisocyanate is called. But the viability of the mixtures obtained (. After mixing the components) is low, and the diisocyanates are toxic. To get rid of these disadvantages, volatile diisocyanates are replaced and the products of their reactions with compounds containing active hydrogen. The compounds are referred to as "hidden or blocked diisocyanates, which are used abroad in single-layer polyurethane lacquers. Blocked diisociaates dissociate at elevated temperatures to free diisociaate. To lower the temperature of dissociation with the catalyst's strength — N-methyl morphine — can be partially reduced.
С целью понижени температуры процесса, предлагаетс в качестве каталнзаторов примен ть алкогол ты и/или фенол ты щелочных металлов.In order to lower the process temperature, it is proposed to use alcohols and / or alkali metal phenols as catalysts.
пымн гидроксильиыми группами. Навеску блокированного 2,4-толуилендиизоциаиата берут такую, чтобы диссоциированных груии NCO хватило иа реакцию с ОН группамн полиэфира дл образовани полиуретана.pymn hydroxyl groups. A portion of the blocked 2,4-toluylene diisociaate is taken such that the dissociated NCO lines are sufficiently reacted with the OH group of the polyester to form polyurethane.
Диссоциацию блокироваииых 2,4-толуилеидиизоцианатов н кинетику соиолимеризации диссоциированных NCO-груии с ОН-группами полиэфира изучают но нарастанию в зкости смеси. Скорость взаимодействи указанных груип оценивают но времени дости еии реагируюи1 ,ей смесью в зкости в 10000 пуаз. В таблице ириведены результаты нспытаний.The dissociation of blocked 2,4-toluylene diisocyanates and the co-polymerization kinetics of dissociated NCO groups with the OH groups of the polyester are studied but with increasing viscosity of the mixture. The rate of interaction of these groups is estimated by the time it reaches to react, 1 with a mixture of viscosity of 10,000 poise. The table and the results of tests.
Из таблицы следует, что 2,4-толуилендиизоцианат , блокированный фенолом или крезолами , не диссоциирует в области исследуемых темиератур (100°С). Иеключеиие составл ет аддукт на основе ./-крезола, диссоциацн которого ироисходит нри 90°С. В нрисутствнч цредлагаемых катализаторов температура термической диссоциации . 2,4-толуилендиизоц11аната , блокироваиного М-крезолом, с;п1жаетс до 60, фенолом и л-крезолом - до 70, о-крезолом - до 80°С.It follows from the table that 2,4-toluene diisocyanate, blocked by phenol or cresols, does not dissociate in the area of the studied temperatures (100 ° С). The compound is an adduct based on ./- cresol, the dissociation of which occurs at 90 ° C. In the presence of these catalysts, the thermal dissociation temperature. 2,4-toluene diisocyanate blocked by M-cresol, c; up to 60, phenol and l-cresol - up to 70, o-cresol - up to 80 ° C.
Таким образом, алкогол ты и фенол ты натри вл ютс эффективными катализаторами термической диссоциации блокированных динзоцианатов. I-ix каталнтическое действие иро вл етс при новышенных темиературах (60-80°С), что создает возможность дл длительного хранени с.месей совместно с предлатаемыми катализаторами с целью их лучшего контактировани .Thus, alkoxides and sodium phenolates are effective catalysts for the thermal dissociation of blocked dinocyanates. The i-ix catalytic effect of iro is at new temperatures (60-80 ° C), which creates the possibility for long-term storage of the s-mixtures together with the offered catalysts for the purpose of their better contact.
Предмет изобретени Subject invention
Способ получени полиуретанов взаимодействием полиэфиров с блокированными изоцианатами в присутствии катализаторов термической диссоциации блокированных изоцианатов , отличающийс тем, что, с целью цонижени температуры процесса, в качестве -катализаторов используют алкогол ты и/или фенол ты щелочных металлов.A method of producing polyurethanes by reacting polyesters with blocked isocyanates in the presence of catalysts for thermal dissociation of blocked isocyanates, characterized in that, in order to reduce the process temperature, alkoxides and / or alkali metal phenols are used as α-catalysts.
Publications (1)
Publication Number | Publication Date |
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SU197943A1 true SU197943A1 (en) |
Family
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3954850A (en) * | 1968-12-18 | 1976-05-04 | Texaco Inc. | Carboxylation of compounds |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3954850A (en) * | 1968-12-18 | 1976-05-04 | Texaco Inc. | Carboxylation of compounds |
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