SU75871A1 - The method of obtaining thermosetting resins - Google Patents
The method of obtaining thermosetting resinsInfo
- Publication number
- SU75871A1 SU75871A1 SU384214A SU384214A SU75871A1 SU 75871 A1 SU75871 A1 SU 75871A1 SU 384214 A SU384214 A SU 384214A SU 384214 A SU384214 A SU 384214A SU 75871 A1 SU75871 A1 SU 75871A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- thermosetting resins
- phase
- resins
- resin
- phenol
- Prior art date
Links
- 229920005989 resin Polymers 0.000 title claims description 21
- 239000011347 resin Substances 0.000 title claims description 21
- 229920001187 thermosetting polymer Polymers 0.000 title claims description 6
- 238000000034 method Methods 0.000 title claims description 5
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 7
- 239000007864 aqueous solution Substances 0.000 claims description 7
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 6
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims description 5
- 239000000243 solution Substances 0.000 claims description 5
- 229910021529 ammonia Inorganic materials 0.000 claims description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 2
- 239000011707 mineral Substances 0.000 claims description 2
- 239000003377 acid catalyst Substances 0.000 claims 1
- 239000007859 condensation product Substances 0.000 claims 1
- 238000001035 drying Methods 0.000 claims 1
- 239000011148 porous material Substances 0.000 claims 1
- 239000002904 solvent Substances 0.000 claims 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- 230000005494 condensation Effects 0.000 description 4
- 238000009833 condensation Methods 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 235000011114 ammonium hydroxide Nutrition 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 2
- 229920003987 resole Polymers 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- -1 methylol groups Chemical group 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000000123 paper Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000012265 solid product Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000002966 varnish Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
Description
Известно получение термореактивных смол двухфазной конденсацией: в первой фазе в щелочной среде, во второй в кислой среде, когда из растворимых в воде основных резольных смол выпадают в виде твердого осадка смолы, способные при нагревании переходить в неплавкое и нерастворимое состо ние .It is known to obtain thermosetting resins by two-phase condensation: in the first phase in an alkaline medium, in the second in an acidic medium, when from the water-soluble basic resole resins fall out in the form of a solid precipitate of the resin, capable of turning into a non-meltable and insoluble when heated.
Выделенные смолы при охлаждении промывают водой и примен ют затСдМ дл изготовлени прессовочных композиций или лаков.The recovered resins are washed with water while cooling, and the application of SCSDM is used for the manufacture of molding compositions or varnishes.
Преимуществом этих смол вл етс повышенна скорость отверладени и незначительное содержание фенола.The advantage of these resins is an increased rate of hardening and a low content of phenol.
Установлено, что под действием водных растворов аммиака на термо:реактивные смолы, осажденные кислотами из водных щелочных pacтворов , образуютс водные растворы высокой концентрации.It has been established that under the action of aqueous ammonia solutions on thermo: reactive resins, precipitated with acids from aqueous alkaline solutions, aqueous solutions of high concentration are formed.
Такими свойствами не обладают обычные резольные смолы, содержащие свободные гидроксильные и метилольные группы, даже в тех случа х , когда их раствор ют в слабых водных растворах сильных оснований .Conventional resole resins containing free hydroxyl and methylol groups do not possess such properties, even in those cases when they are dissolved in weak aqueous solutions of strong bases.
Дл производственных целей смолы раствор ют в водных растворах аммиака, пропитывают этими растсорами ткань, бумагу или древесину , после чего высушивают и прессуют обычным способом.For production purposes, the resins are dissolved in aqueous solutions of ammonia, fabric, paper or wood is impregnated with these solutions, then dried and pressed in the usual way.
Когда необходимо получить твердые термореактивные смолы без наполнител , аммиачные водные растворы смол высушивают распь лением или под вакуумом.When it is necessary to obtain solid thermosetting resins without filler, ammoniacal aqueous solutions of the resins are dried by spraying or under vacuum.
Предлагаемый способ дает возможность получать быстроотвердевающие термореактивные смолы, которые содержат незначительное количество свободного фенола.The proposed method makes it possible to obtain rapidly hardening thermosetting resins, which contain a small amount of free phenol.
Можно получать также термореактивные смолы, совершенно не содержащие фенола, дл чего первуюфазу конденсации в щелочной среде провод т с большим избытком формальдегида , а после подкислени смолы минеральной кислотой выпавший порошкообразный осадок смолы многократно промывают водой .Thermosetting resins that do not contain phenol can also be obtained, for which the first phase of condensation in an alkaline medium is carried out with a large excess of formaldehyde, and after acidifying the resin with mineral acid, the precipitated powdery resin residue is repeatedly washed with water.
Пример.Example.
I моль фенола конденсируют с 2 мол ми формальдегида, вз того в виде 37%-ного водного раствора. Конденсаци проходит при нагревании до 55-60°С. В качестве катализатора примен ют 3% едкого натра от веса вз того фенола, счита на твердый продукт. Конденсацию заканчивают при содержании в водном растворе смолы 3-4% свободного фенола и 5-6% свобод-89I mole of phenol is condensed with 2 moles of formaldehyde, taken as a 37% aqueous solution. Condensation takes place when heated to 55-60 ° C. The catalyst used is 3% sodium hydroxide based on the weight of the phenol taken, based on the solid product. Condensation is completed when the content in the resin aqueous solution is 3-4% free phenol and 5-6% svobod-89
Horo формальдегида. К полученному водному раствору смолы прибавл ют 5%-ную сол ную кислоту. Выпавший осадок смолы тщательно промывают водой дл удалени следов сол ной кислоты. Промытый осадок смолы раствор ют в водных растворах аммиака, начина с 37оной концентрации.Horo formaldehyde. 5% hydrochloric acid was added to the resulting aqueous resin solution. The precipitated resin is thoroughly washed with water to remove traces of hydrochloric acid. The washed resin residue is dissolved in aqueous ammonia solutions, starting from 37th concentration.
Предмет изобретени Subject invention
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU384214A SU75871A1 (en) | 1948-09-13 | 1948-09-13 | The method of obtaining thermosetting resins |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU384214A SU75871A1 (en) | 1948-09-13 | 1948-09-13 | The method of obtaining thermosetting resins |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU75871A1 true SU75871A1 (en) | 1948-11-30 |
Family
ID=48250939
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU384214A SU75871A1 (en) | 1948-09-13 | 1948-09-13 | The method of obtaining thermosetting resins |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU75871A1 (en) |
-
1948
- 1948-09-13 SU SU384214A patent/SU75871A1/en active
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