SU135476A1 - Method for controlling the molecular weight of ethylene and alpha-olefin polymers - Google Patents

Method for controlling the molecular weight of ethylene and alpha-olefin polymers

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Publication number
SU135476A1
SU135476A1 SU666702A SU666702A SU135476A1 SU 135476 A1 SU135476 A1 SU 135476A1 SU 666702 A SU666702 A SU 666702A SU 666702 A SU666702 A SU 666702A SU 135476 A1 SU135476 A1 SU 135476A1
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SU
USSR - Soviet Union
Prior art keywords
molecular weight
ethylene
controlling
alpha
olefin polymers
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Application number
SU666702A
Other languages
Russian (ru)
Inventor
А.Г. Позамантир
Original Assignee
А.Г. Позамантир
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Publication date
Application filed by А.Г. Позамантир filed Critical А.Г. Позамантир
Priority to SU666702A priority Critical patent/SU135476A1/en
Application granted granted Critical
Publication of SU135476A1 publication Critical patent/SU135476A1/en

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Description

Известно, что в процессах полил1ср11зацн11 свойства получающегос  полимера и, в частности, его молекул рный вес, завис т от чистоты исходных иродуктов, так как примеси обычно  вл ютс  агентами обрыва цени н уменьшают молекул рный вес полимера.It is known that in polypropylene processes, the properties of the resulting polymer, and in particular its molecular weight, depend on the purity of the starting materials and products, since the impurities are usually agents of termination and reduce the molecular weight of the polymer.

Предложенный способ регулировани , молекул рного веса полимера этилена и а-олефинов заключаетс  в тo, что дл  уменьшени  молекул рного веса линейных полимеров, образуюш,ихс  при полимеризации эти.деиа в присутствии комплексных металлоорганически, катализаторов (триэтилалюминий и четыреххлористый титан), ввод т небольшое количество солей катионного типа, растворимых в непол рных органических растворител х (четыреххлористое олово). Молекул рный вес иолиэтилена снижаетс  в зависимости от количества введенного чет)1реххлористого олова.The proposed method of controlling the molecular weight of the polymer of ethylene and α-olefins consists in the following: in order to reduce the molecular weight of linear polymers, they are formed during the polymerization of these. the amount of cationic salts soluble in non-polar organic solvents (tin tetrachloride). The molecular weight of the polyethylene is reduced depending on the amount of even tetrachloride tetrachloride introduced.

Пример 1. В колбе, продутой сухим и не содержаш.им кислорода азотом, полимеризуют этилен по следуюш,ей рецептуре: бензин (фракци , кии ша  в иитервале 70-95)500 млExample 1. In a flask purged with dry and non-oxygenated nitrogen with nitrogen, ethylene is polymerized according to the following recipe: gasoline (fraction, cues at intervals of 70-95) 500 ml

Триэтилалюминий0,25 гTriethylamine 0.25 g

Четыреххлористый титан0,41 гTitanium tetrachloride 0.41 g

Полиэтилен, полученный в этих услови х, имеет молекул рньи вес в пределах от 235000 до 450000.The polyethylene obtained under these conditions has a molecular weight ranging from 235,000 to 450,000.

При проведении полимеризации по этой рецептуре, но,с дополнительным введением четыреххлористого олова, молекул рный вес полиэтилена сиижаетс  в зависимости от количества введенного агента обрыва в следующих пределах.When polymerization is carried out according to this recipe, but with the additional introduction of tin tetrachloride, the molecular weight of polyethylene shines depending on the amount of the introduced breakage agent within the following limits.

Количество четырех хлористого олова, гThe amount of four tin chloride, g

П р И м е р 2.PRI me R 2.

В колбе, снабженной герметичным затвором, мешалкой, обратным холодильником, провод т полимеризацию этилена по следуюпхрй рецептуре:In a flask equipped with an airtight seal, a stirrer, a reflux condenser, ethylene is polymerized according to the following formulation:

бензин (фракци , выкипающа  в интервале 70-95)1000 M.Igasoline (fraction boiling in the range of 70-95) 1000 M.I

триэтилалюминий0,5 гtriethylamine 0.5 g

треххлористый титан0,33 titanium trichloride 0.33

Полиэтилен, нолученный в этих услови х, имеет молекул рный вес свыше 650000.The polyethylene obtained under these conditions has a molecular weight of more than 650,000.

При проведении полимеризации по указанной рецептуре, но с дополнительным введением 0,28 г четыреххлористого олова, молекул рный вес полиэтилена снижалс  до 100000 и ниже.When the polymerization was carried out according to the said formulation, but with the additional addition of 0.28 g of tin tetrachloride, the molecular weight of the polyethylene decreased to 100,000 or less.

Предмет изобретени Subject invention

Способ регулировани  молекул рного веса полимеров этилена и и-олефинов, полученных при использовании комплексных металлоорга нических катализаторов, от,п ичающн йс  тем, что, с целью снижени  молекул рного веса полимеров, в реакционную смесьгввод т четыреххлористое олово.The method of controlling the molecular weight of ethylene and i-olefin polymers obtained using complex metal-organic catalysts, from the fact that, in order to reduce the molecular weight of polymers, tin tetrachloride was introduced into the reaction mixture.

SU666702A 1960-05-14 1960-05-14 Method for controlling the molecular weight of ethylene and alpha-olefin polymers SU135476A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU666702A SU135476A1 (en) 1960-05-14 1960-05-14 Method for controlling the molecular weight of ethylene and alpha-olefin polymers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU666702A SU135476A1 (en) 1960-05-14 1960-05-14 Method for controlling the molecular weight of ethylene and alpha-olefin polymers

Publications (1)

Publication Number Publication Date
SU135476A1 true SU135476A1 (en) 1960-11-30

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Family Applications (1)

Application Number Title Priority Date Filing Date
SU666702A SU135476A1 (en) 1960-05-14 1960-05-14 Method for controlling the molecular weight of ethylene and alpha-olefin polymers

Country Status (1)

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SU (1) SU135476A1 (en)

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