SU562094A1 - Method of obtaining pre-polymers - Google Patents
Method of obtaining pre-polymersInfo
- 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
Links
Landscapes
- 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)
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
ID=20590718
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) |
-
1974
- 1974-07-11 SU SU7402043156A patent/SU562094A1/en active
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