JPS5921899B2 - How to process casein plastics - Google Patents
How to process casein plasticsInfo
- Publication number
- JPS5921899B2 JPS5921899B2 JP8237375A JP8237375A JPS5921899B2 JP S5921899 B2 JPS5921899 B2 JP S5921899B2 JP 8237375 A JP8237375 A JP 8237375A JP 8237375 A JP8237375 A JP 8237375A JP S5921899 B2 JPS5921899 B2 JP S5921899B2
- Authority
- JP
- Japan
- Prior art keywords
- plastics
- casein plastics
- casein
- present
- treatment
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired
Links
- 239000005018 casein Substances 0.000 title claims description 16
- BECPQYXYKAMYBN-UHFFFAOYSA-N casein, tech. Chemical compound NCCCCC(C(O)=O)N=C(O)C(CC(O)=O)N=C(O)C(CCC(O)=N)N=C(O)C(CC(C)C)N=C(O)C(CCC(O)=O)N=C(O)C(CC(O)=O)N=C(O)C(CCC(O)=O)N=C(O)C(C(C)O)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=O)N=C(O)C(CCC(O)=O)N=C(O)C(COP(O)(O)=O)N=C(O)C(CCC(O)=N)N=C(O)C(N)CC1=CC=CC=C1 BECPQYXYKAMYBN-UHFFFAOYSA-N 0.000 title claims description 16
- 235000021240 caseins Nutrition 0.000 title claims description 16
- 229920003023 plastic Polymers 0.000 title claims description 14
- 239000004033 plastic Substances 0.000 title claims description 14
- 238000000034 method Methods 0.000 title claims description 11
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 claims description 6
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 claims description 5
- 239000007864 aqueous solution Substances 0.000 claims description 5
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 17
- -1 methylol groups Chemical group 0.000 description 3
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 2
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010828 elution Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229940108461 rennet Drugs 0.000 description 1
- 108010058314 rennet Proteins 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
- 235000010265 sodium sulphite Nutrition 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 235000010215 titanium dioxide Nutrition 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Treatments Of Macromolecular Shaped Articles (AREA)
Description
【発明の詳細な説明】
本発明はカゼインプラスチツクスの処理方法に関するも
のである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for treating casein plastics.
特にカゼインをホルマリンで硬化せしめたカゼインプラ
スチツクスを亜硫酸塩または重亜価酸塩の水溶液で処理
することを特徴とするカゼインプラスチツクスのホルム
アルデヒドの溶出防止方法に関するものである。カゼイ
ンプラスチツクスはカゼインをホルマリンで硬化させた
プラスチックス中に未反応の状態で存在すると思われる
ホルムアルデヒドは勿論、不完全硬化の状態である樹脂
結合の末端基となつているメチロール基などが、カゼイ
ンプラスチツクスからのホルムアルデヒドの溶出原因と
なり、使用上種々の問題となつている。In particular, the present invention relates to a method for preventing the elution of formaldehyde from casein plastics, which is characterized by treating casein plastics, which are casein hardened with formalin, with an aqueous solution of sulfite or binitrate. Casein plastics are made by hardening casein with formalin, which contains not only formaldehyde, which is thought to exist in an unreacted state, but also methylol groups, which are the end groups of resin bonds in an incompletely hardened state. This causes formaldehyde to elute from plastics, causing various problems in use.
本発明者らは、かゝる問題点について鋭意検討した結果
、本発明を完成した。The present inventors have completed the present invention as a result of intensive study on such problems.
即ち、本発明は、カゼインプラスチツクスを亜硫酸塩ま
たは重亜硫酸塩の水溶液で処理することを特徴とするカ
ゼインプラスチツクスの処理方法に関するものである。
本発明において用いる亜硫酸塩又は重亜硫酸塩としては
、アルカリまたはアルカリ土類金属塩が好ましく、特に
工業的に大量生産されているナトリウム塩が入手し易く
好ましい。亜硫酸塩または重亜硫酸塩の水溶液の濃度は
３ｗｔ％以下で充分で、それ以上でも効果は殆んど変ら
ない。That is, the present invention relates to a method for treating casein plastics, which comprises treating casein plastics with an aqueous solution of sulfite or bisulfite.
As the sulfite or bisulfite used in the present invention, alkali or alkaline earth metal salts are preferred, and sodium salts, which are industrially mass-produced, are particularly preferred because they are readily available. It is sufficient that the concentration of the aqueous solution of sulfite or bisulfite is 3 wt% or less, and the effect will hardly change even if the concentration is more than 3 wt%.
但し、該濃度が高くなるとカゼインプラスチツクスが着
色するため１ｗｔ％以下が特に好ましい。本発明におけ
る処理温度及び時間は相関係するものである。However, if the concentration becomes high, the casein plastics will be colored, so it is particularly preferably 1 wt% or less. The processing temperature and time in the present invention are interrelated.
処理温度が低いと、処理時間は長くなり、処理温度が高
くなると処理時間はその逆と・なる。実用上好ましい処
理温度は３０〜４０℃で処理時間は２〜４日である。本
発明における処理方法の前に硬化せしめたカゼインプラ
スチツクスをスチーム処理すると、本発明による処理方
法の効果を更に高めるのに役立Ｊつ。When the processing temperature is low, the processing time becomes long, and vice versa when the processing temperature becomes high. Practically preferred treatment temperature is 30 to 40°C and treatment time is 2 to 4 days. Steam treatment of the cured casein plastics prior to the treatment method according to the invention serves to further increase the effectiveness of the treatment method according to the invention.
スチーム処理の方法としては、例えば６０℃の飽和蒸気
で１〜２時間処理する。又、本発明における処理方法に
おいて、硬化せしめたカゼインプラスチツクスを乾燥す
ることなく、即ち未乾燥の状態のまゝで前述のスチーム
処５理を行ない、そして本発明の処理方法を実施するこ
とが好ましい。As a method of steam treatment, for example, treatment is performed with saturated steam at 60° C. for 1 to 2 hours. Furthermore, in the treatment method of the present invention, it is possible to carry out the above-mentioned steam treatment 5 without drying the hardened casein plastics, that is, in an undried state, and then carry out the treatment method of the present invention. preferable.
即ち以上の様な処理方法により、亜硫酸塩又は重亜硫酸
塩の分子がカゼインプラスチツクスの奥深くにまで十分
に浸透し、未反応のホルムアルデ０ ヒトのみでなくメ
チロール基とも反応して、これらを除去できるものと考
えられる。In other words, by the treatment method described above, sulfite or bisulfite molecules can sufficiently penetrate deep into the casein plastics and react not only with unreacted formaldehyde but also with methylol groups to remove them. considered to be a thing.
実施例 １
レンネツトカゼイン１００部、水３０部、チタンホワイ
ト０．７部を良く混合し、室温で１日間熟”５成したも
のを、３０’Ｃで５分間ロール練りし約５ｍｍの厚さの
シートを作製した。Example 1 100 parts of rennet casein, 30 parts of water, and 0.7 parts of titanium white were thoroughly mixed and aged at room temperature for 1 day.The mixture was roll-kneaded at 30'C for 5 minutes to a thickness of about 5 mm. A sheet was prepared.
そのものを更に８０゜Ｃ、１００ｋｇ／一で１０分間プ
レスを行ない、り０−厚さ４１１のシートを作製した。This was further pressed at 80° C. and 100 kg/1 for 10 minutes to produce a sheet with a thickness of 411 mm.
このシートから、直径１８ｕ１に押切りし円形状サンプ
ルを得、このものを１０倍の５％ホルマリン水溶液に１
５日間浸漬して硬化を行なつた。そのものを表１に示す
如き条件で、亜硫酸ソーダ溶液で処理を行ない溶出ホル
マリン量を測定した。A circular sample was obtained from this sheet by pressing it into a diameter of 18μ1, and the sample was diluted with 10 times the amount of 5% formalin aqueous solution.
Curing was performed by immersion for 5 days. The sample itself was treated with a sodium sulfite solution under the conditions shown in Table 1, and the amount of formalin eluted was measured.
Claims (1)
塩の水溶液で処理することを特徴とするカゼインプラス
チツクスの処理方法。1. A method for treating casein plastics, which comprises treating casein plastics with an aqueous solution of sulfite or bisulfite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8237375A JPS5921899B2 (en) | 1975-07-04 | 1975-07-04 | How to process casein plastics |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8237375A JPS5921899B2 (en) | 1975-07-04 | 1975-07-04 | How to process casein plastics |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS526772A JPS526772A (en) | 1977-01-19 |
| JPS5921899B2 true JPS5921899B2 (en) | 1984-05-23 |
Family
ID=13772772
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8237375A Expired JPS5921899B2 (en) | 1975-07-04 | 1975-07-04 | How to process casein plastics |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5921899B2 (en) |
-
1975
- 1975-07-04 JP JP8237375A patent/JPS5921899B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS526772A (en) | 1977-01-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| ATE56030T1 (en) | PROCESS FOR THE MANUFACTURE OF HYDROLYSIS-STABLE POWDER-FORM AMMONIUM POLYPHOSPHATES. | |
| ES404748A1 (en) | Process for preparing injectionable compositions | |
| JPS5921899B2 (en) | How to process casein plastics | |
| Davenport et al. | Block staining of nervous tissue with silver IV. Embryos | |
| US3141873A (en) | Preparation of lignosulfonate resins | |
| US2926146A (en) | Ion exchange material from bark and formaldehyde | |
| ATA433175A (en) | METHOD FOR THE PRODUCTION OF HIGHLY DISPERSED UREA-FORMALDEHYDE CONDENSATION POLYMERS MODIFIED BY SULFOGROUPES | |
| ES418324A1 (en) | Procedure for the manufacture of a three-dimensional or flat structure based on cork particles. (Machine-translation by Google Translate, not legally binding) | |
| JPS5921898B2 (en) | Processing method for casein molded products | |
| GB525158A (en) | Process for hardening fibres, filaments, threads, films and the like obtained from protein solutions | |
| US2325272A (en) | Accelerating of hardening of plastic protein articles | |
| JPS5921897B2 (en) | Processing of casein plastics | |
| SU463679A1 (en) | Method for modifying xanthates of hydroxyl-containing polymers | |
| AT353243B (en) | PROCESS FOR THE PRODUCTION OF CARBONIC ACID ESTERS, KETONES OR NITRILE BY DECARBAL COXYLATION | |
| SU117197A1 (en) | The method of processing synthetic fiber based on polyvinyl alcohol | |
| US2061063A (en) | Tanning process | |
| SU104394A2 (en) | The method of preparation of core and molding mixture | |
| JPS6039480A (en) | Sericine fixing and weight increasing process of silk fiber | |
| GB377205A (en) | Process for accelerating the thorough hardening of masses made of casein and other protein substances | |
| US1992478A (en) | Process for accelerating the hardening of shaped casein articles | |
| GB556432A (en) | Improvements in the manufacture of gramophone needles | |
| DE346832C (en) | Process for the production of artificial threads, films, plastic masses, etc. | |
| SU128118A1 (en) | The method of obtaining synthetic resins | |
| GB278684A (en) | Improved treatment of hydrated cellulose | |
| DE872860C (en) | Process for finishing wood |