JPH0420925B2 - - Google Patents
Info
- Publication number
- JPH0420925B2 JPH0420925B2 JP59112306A JP11230684A JPH0420925B2 JP H0420925 B2 JPH0420925 B2 JP H0420925B2 JP 59112306 A JP59112306 A JP 59112306A JP 11230684 A JP11230684 A JP 11230684A JP H0420925 B2 JPH0420925 B2 JP H0420925B2
- Authority
- JP
- Japan
- Prior art keywords
- mold release
- release agent
- castor oil
- hydrogenated castor
- agent
- 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 - Lifetime
Links
- 239000006082 mold release agent Substances 0.000 claims description 20
- 239000004359 castor oil Substances 0.000 claims description 18
- 235000019438 castor oil Nutrition 0.000 claims description 18
- ZEMPKEQAKRGZGQ-XOQCFJPHSA-N glycerol triricinoleate Natural products CCCCCC[C@@H](O)CC=CCCCCCCCC(=O)OC[C@@H](COC(=O)CCCCCCCC=CC[C@@H](O)CCCCCC)OC(=O)CCCCCCCC=CC[C@H](O)CCCCCC ZEMPKEQAKRGZGQ-XOQCFJPHSA-N 0.000 claims description 18
- 239000000047 product Substances 0.000 claims description 16
- 239000004814 polyurethane Substances 0.000 claims description 15
- 229920002635 polyurethane Polymers 0.000 claims description 15
- 229920001228 polyisocyanate Polymers 0.000 claims description 12
- 239000005056 polyisocyanate Substances 0.000 claims description 12
- 229920005862 polyol Polymers 0.000 claims description 11
- 150000003077 polyols Chemical class 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 238000000465 moulding Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- 239000003431 cross linking reagent Substances 0.000 claims description 4
- 239000012752 auxiliary agent Substances 0.000 claims description 3
- 239000003054 catalyst Substances 0.000 claims description 3
- 239000007795 chemical reaction product Substances 0.000 claims description 3
- 239000004604 Blowing Agent Substances 0.000 claims description 2
- 150000002009 diols Chemical class 0.000 claims description 2
- 150000001875 compounds Chemical class 0.000 description 8
- IMNIMPAHZVJRPE-UHFFFAOYSA-N triethylenediamine Chemical compound C1CN2CCN1CC2 IMNIMPAHZVJRPE-UHFFFAOYSA-N 0.000 description 8
- 239000011541 reaction mixture Substances 0.000 description 7
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 6
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 6
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 4
- 239000004721 Polyphenylene oxide Substances 0.000 description 3
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 3
- 125000003277 amino group Chemical group 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 239000012948 isocyanate Substances 0.000 description 3
- 150000002513 isocyanates Chemical class 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 235000019198 oils Nutrition 0.000 description 3
- 229920000570 polyether Polymers 0.000 description 3
- UPMLOUAZCHDJJD-UHFFFAOYSA-N 4,4'-Diphenylmethane Diisocyanate Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=C(N=C=O)C=C1 UPMLOUAZCHDJJD-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 description 2
- GOOHAUXETOMSMM-UHFFFAOYSA-N Propylene oxide Chemical compound CC1CO1 GOOHAUXETOMSMM-UHFFFAOYSA-N 0.000 description 2
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical group OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 description 2
- 125000002947 alkylene group Chemical group 0.000 description 2
- HIFVAOIJYDXIJG-UHFFFAOYSA-N benzylbenzene;isocyanic acid Chemical class N=C=O.N=C=O.C=1C=CC=CC=1CC1=CC=CC=C1 HIFVAOIJYDXIJG-UHFFFAOYSA-N 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 235000011187 glycerol Nutrition 0.000 description 2
- IQPQWNKOIGAROB-UHFFFAOYSA-N isocyanate group Chemical group [N-]=C=O IQPQWNKOIGAROB-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- HOSGXJWQVBHGLT-UHFFFAOYSA-N 6-hydroxy-3,4-dihydro-1h-quinolin-2-one Chemical group N1C(=O)CCC2=CC(O)=CC=C21 HOSGXJWQVBHGLT-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- UEEJHVSXFDXPFK-UHFFFAOYSA-N N-dimethylaminoethanol Chemical compound CN(C)CCO UEEJHVSXFDXPFK-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 150000001414 amino alcohols Chemical class 0.000 description 1
- CDQSJQSWAWPGKG-UHFFFAOYSA-N butane-1,1-diol Chemical compound CCCC(O)O CDQSJQSWAWPGKG-UHFFFAOYSA-N 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229960002887 deanol Drugs 0.000 description 1
- 239000012973 diazabicyclooctane Substances 0.000 description 1
- 239000012972 dimethylethanolamine Substances 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 150000008282 halocarbons Chemical class 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002736 metal compounds Chemical class 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- DYFXGORUJGZJCA-UHFFFAOYSA-N phenylmethanediamine Chemical compound NC(N)C1=CC=CC=C1 DYFXGORUJGZJCA-UHFFFAOYSA-N 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- 230000002250 progressing effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000000344 soap Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 150000003512 tertiary amines Chemical class 0.000 description 1
- CYRMSUTZVYGINF-UHFFFAOYSA-N trichlorofluoromethane Chemical compound FC(Cl)(Cl)Cl CYRMSUTZVYGINF-UHFFFAOYSA-N 0.000 description 1
- 235000015112 vegetable and seed oil Nutrition 0.000 description 1
- 239000008158 vegetable oil Substances 0.000 description 1
- -1 vinyl compound Chemical class 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Injection Moulding Of Plastics Or The Like (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Polyurethanes Or Polyureas (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
ポリウレタン成形品はその物理的性状に応じ
て、座席のクツシヨン、自動車用部品、電子・電
気機器用部品などに利用されており、近年自動車
部品として内装材、外装材への応用が進んでい
る。
発泡した中心部分と非発泡のあるいは微細な気
泡を有する表皮部分とを持つポリウレタン成形品
が、自動車のバンバー、アームレスト、ハンドル
などに用いられている。
〔従来の技術および問題点〕
ポリウレタン成形品は、ポリイソシアネート、
イソシアネート基と反応性の水素原子を少なくと
も２個含有する化合物（以下、ポリオールとい
う）、および添加剤などからなる反応混合物を密
閉できる型に導入することによつて製造されてい
る。
反応混合物は型内で硬化し、成形品として取り
出される。型は反応温度を制御するため、熱伝導
性の高い素材で作られ、一般には金属製の型が用
いられている。
通常、ポリウレタン成形品が金型表面に固着す
るのを防ぐため、金型表面にワツクス、金属石け
ん、油などの離型剤を塗布する方法が採られてい
る。この場合成形品と金型表面との間に、表面張
力が小さい薄膜が形成され、この薄膜は成形品に
も金型表面にも固着しないため、成形品を容易に
取り出すことができる。
しかし、この方法では、成形を行うたびに新し
い離型剤を塗布し、さらに一定の回数毎に金型表
面に残留する旧い離型剤を取り除かなければなら
ない。これはかなりの人力と時間を要する。
一方離型性を有する化合物をポリウレタン反応
混合物に添加する方法も研究されており、金型表
面に塗布する離型剤を外部離型剤と呼び、ポリウ
レタン反応混合物に添加する離型剤を内部離型剤
と呼んでいる。
外部離型剤の塗布作業を軽減し、あるいは成形
金型の表面の清掃を省略することができ、成形工
程における操作を減少させ、生産性の向上に寄与
するポリウレタン成形品の製造方法を提供するこ
とが本発明の目的である。
〔問題点を解決するための手段〕
本発明は、予め外部離型剤を塗布した成形金型
に、有機ポリイソシアネート、ポリオール、架橋
剤、触媒、および内部離型剤、必要に応じて更に
発泡剤、助剤よりなる反応混合物を導入してポリ
ウレタン成形品を製造する方法において、内部離
型剤として硬化ヒマシ油あるいは硬化ヒマシ油と
有機ポリイソシアネートとの反応物を用いるポリ
ウレタン成形品の製造方法である。
本発明で用いられる有機ポリイソシアネートと
しては、ジフエニルメタンジイソシアネート、ジ
フエニルメタンジイソシアネートとその同族体と
の混合物、これらのポリイソシアネートを多官能
性水酸基含有化合物と反応させたりあるいはカル
ボジイミド化により変性した変性イソシアネー
ト、およびこれらのポリイソシアネートや変性イ
ソシアネートの混合物などがある。ポリオールと
しては、グリセリンなどの多官能性水酸基含有化
合物またはトリエタノールアミンなどのアミノ基
および水酸基を含有する化合物あるいはジアミノ
トルエンなどのアミノ基含有化合物に、エチレン
オキシド、プロピレンオキシドなどのアルキレン
オキシドを付加した分子中に２〜６個の水酸基を
含有し、平均水酸基当量が1000〜3000のポリエー
テルポリオール、あるいはポリエーテルポリオー
ル中でビニル化合物を重合させたポリマーポリオ
ールなどが用いられる。架橋剤としては、主にエ
チレングリコール、プロピレングリコール、ブタ
ンジオールなどの低分子量ジオールが用いられ、
トリエタノールアミンなどのアミノアルコール、
アミノ基含有化合物、あるいはこれらにアルキレ
ンオキシドを付加させたポリオールなども併用さ
れる。
触媒としては、トリエチレンジアミン、ジメチ
ルエタノールアミンなどの第３級アミンや、金属
化合物が用いられる。
発泡剤としては、水あるいはハロゲン化炭化水
素類、窒素などが用いられる。助剤としては、気
泡調整剤、変色防止剤、流れ性改良剤、着色剤な
ど種々のものが必要に応じて使用されている。
これらの物質は、必要量を予めポリオールに加
えるか、あるいはポリイソシアネートとの反応時
に加えても良い。
外部離型剤としては、固形分融点が100℃以上
のワツクス系離型剤が好ましい。
本発明は、硬化ヒマシ油を内部離型剤として用
いることを特徴とするものである。
硬化ヒマシ油は、ヒマシ油に水素を添加して固
状の脂肪に変えたものであり、植物油を原料にす
る硬化油（水素添加油）の一種である（「油脂」
第23巻第１号第（26）頁（1970年）参照）。
また硬化ヒマシ油と有機ポリイソシアネートと
の反応物も内部離型剤として有効である。硬化ヒ
マシ油を有機ポリイソシアネートに添加し、その
反応混合物をそのままポリウレタン成形品の製造
に用いることもできる。硬化ヒマシ油の添加量は
ポリウレタン成形品の重量に対して0.1〜５％、
好ましくは１〜３％である。
本発明を実施例および比較例により詳細に説明
する。
〔実施例 １〜３〕
グリセリンにエチレンオキシドとプロピレンオ
キシドを付加した水酸基価24mgKOH／ｇのポリ
エーテルポリオール100部、エチレングリコール
20部、トリエチレンジアミン0.2部、トリエチレ
ンジアミン誘導体（DABCO DC−２）0.2部、フ
レオン11を６部、および硬化ヒマシ油（融点約85
℃、水酸基価約150）の所定量を良く混合したポ
リオール成分と、イソシアネート基含有量26.5％
のジフエニルメタンジイソシアネート誘導体（ウ
レタン変性体とカルボジイミド変性体との混合
物）とを、イソシアネート・インデツクスが105
となるような割合で混合した。
この反応混合物を、予めワツクス系離型剤（中
京油脂製リムリケイＢ−269）をはけ塗りし、温
度を80℃に設定したアルミ製のＵ字型金型に注入
した。この金型は長さ40cm、幅20cm、深さ20cmで
ある。約30秒後に金型を開きＵ字型の成形品を得
た。その後外部離型剤の塗布および金型表面の清
掃を行うことなく、上述と同じ操作を繰り返し、
脱型できなくなるまでの回数を調べた。
〔実施例 ４〕
硬化ヒマシ油５部を実施例１〜３のジフエニル
メタンジイソシアネート誘導体117部に加え、撹
拌しながら２時間80℃に保つた。室温まで冷却し
たのち、実施例１〜３に示した。硬化ヒマシ油を
除くポリオール成分と混合し、実施例１〜３と同
様に操作した。
〔比較例 １〜２〕
実施例に対して、(1)硬化ヒマシ油を加えない
例、(2)ヒマシ油を加えた例を示す。ポリウレタン
成形品の重量に対する硬化ヒマシ油の添加量と、
繰り返し脱型回数との関係は表に示すとおりであ
る。
〔発明の効果〕
実施例および比較例から明らかなように、硬化
ヒマシ油をポリウレタン成形品原料に加えること
によりポリウレタン成形品の脱型性が改良され、
外部離型剤の塗布作業は大幅に軽減される。
【表】[Detailed Description of the Invention] [Field of Industrial Application] Depending on their physical properties, polyurethane molded products are used for seat cushions, automobile parts, electronic/electrical equipment parts, etc. Its application to interior and exterior materials is progressing. Polyurethane molded products having a foamed center portion and a non-foamed skin portion or a skin portion containing fine cells are used for automobile bumpers, armrests, steering wheels, etc. [Conventional technology and problems] Polyurethane molded products are made of polyisocyanate,
It is produced by introducing a reaction mixture consisting of a compound containing at least two hydrogen atoms reactive with isocyanate groups (hereinafter referred to as polyol), additives, etc. into a sealable mold. The reaction mixture is cured in the mold and removed as a molded article. The mold is made of a material with high thermal conductivity in order to control the reaction temperature, and metal molds are generally used. Normally, in order to prevent polyurethane molded products from sticking to the mold surface, a method of applying a mold release agent such as wax, metallic soap, or oil to the mold surface is adopted. In this case, a thin film with low surface tension is formed between the molded product and the mold surface, and since this thin film does not adhere to either the molded product or the mold surface, the molded product can be easily removed. However, with this method, a new mold release agent must be applied each time molding is performed, and the old mold release agent remaining on the mold surface must be removed at regular intervals. This requires considerable manpower and time. On the other hand, a method of adding a compound with mold release properties to the polyurethane reaction mixture is also being researched.The mold release agent applied to the mold surface is called an external mold release agent, and the mold release agent added to the polyurethane reaction mixture is called an internal release agent. It is called a molding agent. To provide a method for producing a polyurethane molded product that can reduce the work of applying an external mold release agent or omit cleaning the surface of a molding die, reduce operations in the molding process, and contribute to improved productivity. This is the object of the present invention. [Means for Solving the Problems] The present invention provides a mold that has been coated with an external mold release agent in advance, an organic polyisocyanate, a polyol, a crosslinking agent, a catalyst, an internal mold release agent, and, if necessary, a foaming mold. A method for producing a polyurethane molded article by introducing a reaction mixture consisting of an agent and an auxiliary agent, and a method for producing a polyurethane molded article using hydrogenated castor oil or a reaction product of hydrogenated castor oil and an organic polyisocyanate as an internal mold release agent. be. The organic polyisocyanates used in the present invention include diphenylmethane diisocyanate, mixtures of diphenylmethane diisocyanate and its homologs, and modified polyisocyanates obtained by reacting these polyisocyanates with polyfunctional hydroxyl group-containing compounds or by carbodiimidization. These include isocyanates and mixtures of these polyisocyanates and modified isocyanates. Polyols include molecules in which alkylene oxides such as ethylene oxide and propylene oxide are added to polyfunctional hydroxyl group-containing compounds such as glycerin, compounds containing amino groups and hydroxyl groups such as triethanolamine, or amino group-containing compounds such as diaminotoluene. Polyether polyols containing 2 to 6 hydroxyl groups and having an average hydroxyl equivalent of 1000 to 3000, or polymer polyols obtained by polymerizing a vinyl compound in polyether polyols are used. As a crosslinking agent, low molecular weight diols such as ethylene glycol, propylene glycol, and butanediol are mainly used.
amino alcohols such as triethanolamine,
Amino group-containing compounds or polyols obtained by adding alkylene oxide to these compounds are also used. As the catalyst, tertiary amines such as triethylenediamine and dimethylethanolamine, and metal compounds are used. As the blowing agent, water, halogenated hydrocarbons, nitrogen, etc. are used. Various auxiliary agents, such as bubble control agents, discoloration inhibitors, flowability improvers, and coloring agents, are used as necessary. These substances may be added in advance to the polyol in the required amount, or may be added during the reaction with the polyisocyanate. As the external mold release agent, a wax type mold release agent having a solid content melting point of 100° C. or higher is preferable. The present invention is characterized in that hydrogenated castor oil is used as an internal mold release agent. Hydrogenated castor oil is made by adding hydrogen to castor oil to turn it into a solid fat, and is a type of hydrogenated oil (hydrogenated oil) made from vegetable oil.
(See Vol. 23, No. 1, p. (26) (1970)). A reaction product of hydrogenated castor oil and an organic polyisocyanate is also effective as an internal mold release agent. It is also possible to add hydrogenated castor oil to an organic polyisocyanate and use the reaction mixture as is for the production of polyurethane moldings. The amount of hydrogenated castor oil added is 0.1 to 5% based on the weight of the polyurethane molded product.
Preferably it is 1 to 3%. The present invention will be explained in detail with reference to Examples and Comparative Examples. [Examples 1 to 3] 100 parts of polyether polyol with a hydroxyl value of 24 mgKOH/g, which is obtained by adding ethylene oxide and propylene oxide to glycerin, ethylene glycol
20 parts of triethylenediamine, 0.2 parts of triethylenediamine, 0.2 parts of triethylenediamine derivative (DABCO DC-2), 6 parts of Freon 11, and hydrogenated castor oil (melting point approx. 85
℃, hydroxyl value approximately 150) and an isocyanate group content of 26.5%.
diphenylmethane diisocyanate derivative (mixture of urethane-modified product and carbodiimide-modified product) with an isocyanate index of 105
They were mixed in such a proportion that This reaction mixture was poured into an aluminum U-shaped mold which had been brushed with a wax-based mold release agent (Limurikei B-269, manufactured by Chukyo Yushi Co., Ltd.) and whose temperature was set at 80°C. This mold is 40cm long, 20cm wide, and 20cm deep. After about 30 seconds, the mold was opened to obtain a U-shaped molded product. After that, repeat the same operation as above without applying external mold release agent or cleaning the mold surface.
The number of times the mold could no longer be demolded was investigated. [Example 4] 5 parts of hydrogenated castor oil were added to 117 parts of the diphenylmethane diisocyanate derivatives of Examples 1 to 3, and the mixture was kept at 80°C for 2 hours with stirring. After cooling to room temperature, it was shown in Examples 1 to 3. It was mixed with polyol components except hydrogenated castor oil and operated in the same manner as in Examples 1 to 3. [Comparative Examples 1 to 2] In contrast to the examples, (1) an example in which hydrogenated castor oil was not added and (2) an example in which castor oil was added are shown. The amount of hydrogenated castor oil added to the weight of the polyurethane molded product,
The relationship with the number of times of repeated demolding is shown in the table. [Effects of the Invention] As is clear from the Examples and Comparative Examples, adding hydrogenated castor oil to the raw material for polyurethane molded products improves the demoldability of polyurethane molded products,
The work of applying an external mold release agent is greatly reduced. 【table】
Claims (1)
ポリイソシアネート、ポリオール、架橋剤、触
媒、および内部離型剤、必要に応じて更に発泡
剤、助剤よりなる反応混合物を導入してポリウレ
タン成形品を製造する方法において、内部離型剤
として硬化ヒマシ油あるいは硬化ヒマシ油と有機
ポリイソシアネートとの反応物を用いることを特
徴とするポリウレタン成形品の製造方法。 ２ 硬化ヒマシ油の添加量が、成形品重量に対し
て0.1〜５％であることを特徴とする特許請求の
範囲第１項に記載の製造方法。 ３ 架橋剤として低分子量ジオールを用いること
を特徴とする特許請求の範囲第１項あるいは第２
項に記載の製造方法。[Scope of Claims] 1 A reaction consisting of an organic polyisocyanate, a polyol, a crosslinking agent, a catalyst, an internal mold release agent, and further a blowing agent and an auxiliary agent as necessary is applied to a molding die coated with an external mold release agent in advance. A method for producing a polyurethane molded article by introducing a mixture, the method comprising using hydrogenated castor oil or a reaction product of hydrogenated castor oil and an organic polyisocyanate as an internal mold release agent. 2. The manufacturing method according to claim 1, wherein the amount of hydrogenated castor oil added is 0.1 to 5% based on the weight of the molded product. 3. Claim 1 or 2, characterized in that a low molecular weight diol is used as a crosslinking agent.
The manufacturing method described in section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59112306A JPS60255835A (en) | 1984-05-31 | 1984-05-31 | Production of polyurethane molding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59112306A JPS60255835A (en) | 1984-05-31 | 1984-05-31 | Production of polyurethane molding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60255835A JPS60255835A (en) | 1985-12-17 |
| JPH0420925B2 true JPH0420925B2 (en) | 1992-04-07 |
Family
ID=14583372
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59112306A Granted JPS60255835A (en) | 1984-05-31 | 1984-05-31 | Production of polyurethane molding |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60255835A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0777733B2 (en) * | 1986-12-15 | 1995-08-23 | 三井東圧化学株式会社 | Cast polymerization method for lenses made of sulfur-containing urethane resin |
| US5753730A (en) * | 1986-12-15 | 1998-05-19 | Mitsui Toatsu Chemicals, Inc. | Plastic lenses having a high-refractive index, process for the preparation thereof and casting polymerization process for preparing sulfur-containing urethane resin lens and lens prepared thereby |
-
1984
- 1984-05-31 JP JP59112306A patent/JPS60255835A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60255835A (en) | 1985-12-17 |
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