SU562094A1 - Method of obtaining pre-polymers - Google Patents

Method of obtaining pre-polymers

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Publication number
SU562094A1
SU562094A1 SU7402043156A SU2043156A SU562094A1 SU 562094 A1 SU562094 A1 SU 562094A1 SU 7402043156 A SU7402043156 A SU 7402043156A SU 2043156 A SU2043156 A SU 2043156A SU 562094 A1 SU562094 A1 SU 562094A1
Authority
SU
USSR - Soviet Union
Prior art keywords
polymers
obtaining pre
conversion
methyl methacrylate
prepolymer
Prior art date
Application number
SU7402043156A
Other languages
Russian (ru)
Inventor
И.А. Воронкова
Т.И. Радбиль
Н.А. Михалев
Б.П. Штаркман
Original Assignee
Предприятие П/Я М-5927
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Предприятие П/Я М-5927 filed Critical Предприятие П/Я М-5927
Priority to SU7402043156A priority Critical patent/SU562094A1/en
Application granted granted Critical
Publication of SU562094A1 publication Critical patent/SU562094A1/en

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  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
  • Polymerisation Methods In General (AREA)

Description

1one

Изобретение относитс  к получению форполимеров эфиров метакрйловой кислоты или смеси эфиров метакрйловой и акриловой кислот, примен емых при изготовлении конструкционных материалов путем пропитки стекловолокна, дерева и др., при получении профильных полимерных изделий непрерывньал методом, при производстве гранул литьевого или экструзионного назначени , при изготовлении полимерных изделий путем блочной полимеризации в форме.The invention relates to the preparation of prepolymers of methacrylic acid esters or a mixture of methacrylic and acrylic acid esters used in the manufacture of structural materials by impregnation of fiberglass, wood, etc., in the preparation of core polymer products by a continuous method, in the production of injection-molded or extruded granules, in the manufacture of polymer materials products by block polymerization in the form.

Известен способ получени  форполимера метилметакрилата путем пропускани  99 вес.ч. метилметакрилата и 1 вес.ч. трет-бутилпербензоата под давлением через трубчатый реактор сначала при , а затем при . ; В зоне реактора с температурой 144 с мономер полимеризуетс  до конверсии Ilj5%fl.A known method for producing methyl methacrylate prepolymer by passing 99 parts by weight. methyl methacrylate and 1 weight.h. tert-butyl perbenzoate under pressure through a tubular reactor, first at and then at. ; In the reactor zone at a temperature of 144 ° C, the monomer is polymerized to Ilj5% fl conversion.

Этот способ имеет тот недостаток,что процесс форполимеризаций в значительной мере чувствителен ко времени пребывани  полимеризуемого материала в реакторе. Незначительное изменение времени пребывани  при высокой скорости процесса может привести к значителному изменению степени конверсии и в This method has the disadvantage that the prepolymerization process is significantly sensitive to the residence time of the polymerized material in the reactor. A slight change in the residence time at a high speed of the process can lead to a significant change in the degree of conversion and in

некоторой мере к изменению молекул рного веса. Поэтому при этом способе форполимеризации необходимо проводить резкое охлаждение полимеризуемого матриала по достижении заданной степени конверсии, что вызывает большие ТРУДНОСТИ в случае,если процесс проходит в сравнительно большом объеме материала .to some extent to a change in molecular weight. Therefore, with this method of prepolymerization, it is necessary to carry out a sharp cooling of the polymerized material upon reaching a given degree of conversion, which causes great DIFFICULTIES if the process takes place in a relatively large volume of material.

Известен способ получени  форполимера метилметакрилата путем полимеризации его в атмосфере азота без инициатора в присутствии передатчиков цепи при 65-105 с. Благодар  тому, что в реакционную среду не ввод т инициатор , процесс поли 1еризации легко управл ем (процесс превращени  проходит с небольшой скоростью), а форполимер получаетс  стабильным при хранении Недостатком этого способа  вл етс  длительность процесса полимеризации (100-380 мин), если требуетс  получить достаточную высокую степень кОЕгверсии 2 .A known method of producing methyl methacrylate prepolymer by polymerizing it in nitrogen atmosphere without initiator in the presence of chain transmitters at 65-105 s. Due to the fact that the initiator is not introduced into the reaction medium, the polymerization process is easily controlled (the transformation process takes place at a low speed) and the prepolymer is stable during storage. The disadvantage of this method is the duration of the polymerization process (100-380 min) if required to obtain a sufficiently high degree of coexistence 2.

Claims (4)

1.Патент АНГЛИИ 875853, кл. 2 (6) р, 1970.1. The patent of England 875853, cl. 2 (6) r, 1970. 2.Патент Японии 40693, кл, С 08, 1971.2. Japanese Patent 40693, Cl, C 08, 1971. 3.Патент Англии №937215, ,кл. 2 (6) р, 1971.3.Patent of England No. 937215,, cl. 2 (6) p, 1971. 4.Патент ФРГ № 2062976, кл. 09 в 4 3/68, 24.06.71.4. The patent of Germany No. 2062976, cl. 09 at 4 3/68, 06.24.71.
SU7402043156A 1974-07-11 1974-07-11 Method of obtaining pre-polymers SU562094A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU7402043156A SU562094A1 (en) 1974-07-11 1974-07-11 Method of obtaining pre-polymers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU7402043156A SU562094A1 (en) 1974-07-11 1974-07-11 Method of obtaining pre-polymers

Publications (1)

Publication Number Publication Date
SU562094A1 true SU562094A1 (en) 1978-03-05

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
SU7402043156A SU562094A1 (en) 1974-07-11 1974-07-11 Method of obtaining pre-polymers

Country Status (1)

Country Link
SU (1) SU562094A1 (en)

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