SU61268A1 - Method for increasing heat resistance of extruded and cast polystyrene products - Google Patents
Method for increasing heat resistance of extruded and cast polystyrene productsInfo
- Publication number
- SU61268A1 SU61268A1 SU30856A SU30856A SU61268A1 SU 61268 A1 SU61268 A1 SU 61268A1 SU 30856 A SU30856 A SU 30856A SU 30856 A SU30856 A SU 30856A SU 61268 A1 SU61268 A1 SU 61268A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- heat resistance
- extruded
- polystyrene
- increasing heat
- products
- Prior art date
Links
Landscapes
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Description
Теплостойкость полистирола колеблетс в пределах 70-90° по Мартенсу. В р де случаев требуетс повысить теплостойкость полистирола . Также желательно устранить наблюдающиес иногда влени растрескивани изделий из полистирола, что указывает на его старение. По литературным указани м, устранение растрескивани достигаетс применением нагревани при температуре пор дка 100°, т. е. выше температуры разм гчени полистирола. При этой температуре прогрев следует вести в формах, иначе издели тер ют свою конфигурацию.The heat resistance of polystyrene varies in the range of 70-90 ° Martens. In a number of cases, it is required to increase the heat resistance of polystyrene. It is also desirable to eliminate the occasional occurrence of cracking of polystyrene products, which indicates its aging. According to the literature, the elimination of cracking is achieved by applying heat at a temperature of about 100 °, i.e., above the softening temperature of polystyrene. At this temperature, heating should be carried out in forms, otherwise the products lose their configuration.
В результате проведенных авторами исследований была установлена возможность повышени теплостойкости прессованных или литых изделий из полистирола, причем одновременно достигаетс и предохранение их от влений старени путем прогрева, например, в термостате при температуре на несколько градусов ниже температуры их разм гчени по Мартенсу.As a result of the research conducted by the authors, the possibility of increasing the heat resistance of extruded or molded polystyrene products was established, while their protection against aging is also achieved by heating, for example, in a thermostat at a temperature several degrees below Martens softening temperature.
В зависимости от температуры прогрева, длительности его и качества исходного полистирола наблюдаетс повышение теплостойкости на 10-20°. Так, например, дл изделий из эмульсионного полистирола с теплостойкостью в 90° по Мартенсу после прогрева при 70° в течение 72 час получена теплостойкость в 110°, т. е. достигаетс повышение на 20°.Depending on the heating temperature, its duration and the quality of the original polystyrene, an increase in heat resistance by 10–20 ° C is observed. For example, for products made of emulsion polystyrene with heat resistance of 90 ° Martens, after heating at 70 ° for 72 hours, heat resistance of 110 ° is obtained, i.e., an increase of 20 ° is achieved.
Прогревом изделий из того же полистирола при температуре 85- 86° в течение 24 час достигаетс повышение теплостойкости на 18 (т. е. 108° по Мартенсу).By heating products of the same polystyrene at a temperature of 85-86 ° for 24 hours, an increase in heat resistance of 18 (i.e., 108 ° by Martens) is achieved.
Дл изделий из наполненного полистирола (наполнитель кварц, тальк и др.) наблюдаетс также при прогреве повышение теплостойкостиFor products made of filled polystyrene (filler quartz, talc, etc.), an increase in heat resistance is also observed during heating.
№ 61268- 2 -No. 61268-2 -
на 15-20°. Так, например, прогретое при 80° в течение 24 час изделие из полистирола с кварцем дало повышение теплостойкости на 15° (115° по Мартенсу).by 15-20 °. For example, a polystyrene product with quartz heated at 80 ° for 24 hours increased heat resistance by 15 ° (115 ° according to Martens).
Прогретые образцы при длительном хранении показывают полную стабильность: «е наблюдаетс по влени трещин, матовости и др. влелений , характеризующих старение полистирола.Heated specimens during long-term storage show complete stability: there is no occurrence of cracks, haze, and other properties characterizing the aging of polystyrene.
Предмет изобретени Subject invention
Способ повышени теплостойкости прессованных и литых изделий из полистирола путем термической обработки, отличающийс тем, что указанные издели подвергают прогреву при температуре ниже температуры их разм гчени по Мартенсу.A method of increasing heat resistance of extruded and cast products from polystyrene by heat treatment, characterized in that said products undergo heating at a temperature below their softening temperature according to Martens.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU30856A SU61268A1 (en) | 1940-03-10 | 1940-03-10 | Method for increasing heat resistance of extruded and cast polystyrene products |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU30856A SU61268A1 (en) | 1940-03-10 | 1940-03-10 | Method for increasing heat resistance of extruded and cast polystyrene products |
Publications (2)
Publication Number | Publication Date |
---|---|
SU17475A1 SU17475A1 (en) | 1930-09-30 |
SU61268A1 true SU61268A1 (en) | 1941-11-30 |
Family
ID=48242713
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU30856A SU61268A1 (en) | 1940-03-10 | 1940-03-10 | Method for increasing heat resistance of extruded and cast polystyrene products |
Country Status (1)
Country | Link |
---|---|
SU (1) | SU61268A1 (en) |
-
1940
- 1940-03-10 SU SU30856A patent/SU61268A1/en active
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