JPH02296815A - Production of integral-skin polyurethane molding - Google Patents
Production of integral-skin polyurethane moldingInfo
- Publication number
- JPH02296815A JPH02296815A JP11770089A JP11770089A JPH02296815A JP H02296815 A JPH02296815 A JP H02296815A JP 11770089 A JP11770089 A JP 11770089A JP 11770089 A JP11770089 A JP 11770089A JP H02296815 A JPH02296815 A JP H02296815A
- Authority
- JP
- Japan
- Prior art keywords
- integral
- skin polyurethane
- polyether polyol
- monochlorodifluoromethane
- polyurethane molding
- 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.)
- Pending
Links
- 239000004814 polyurethane Substances 0.000 title claims abstract description 13
- 229920002635 polyurethane Polymers 0.000 title claims abstract description 13
- 238000004519 manufacturing process Methods 0.000 title claims description 6
- 238000000465 moulding Methods 0.000 title abstract description 6
- 229920005862 polyol Polymers 0.000 claims abstract description 28
- 150000003077 polyols Chemical class 0.000 claims abstract description 28
- 229920000642 polymer Polymers 0.000 claims abstract description 11
- VOPWNXZWBYDODV-UHFFFAOYSA-N Chlorodifluoromethane Chemical compound FC(F)Cl VOPWNXZWBYDODV-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000003431 cross linking reagent Substances 0.000 claims abstract description 9
- 125000003118 aryl group Chemical group 0.000 claims abstract description 6
- 229920001228 polyisocyanate Polymers 0.000 claims abstract description 6
- 239000005056 polyisocyanate Substances 0.000 claims abstract description 6
- 150000001875 compounds Chemical class 0.000 claims abstract description 4
- 239000001257 hydrogen Substances 0.000 claims abstract description 4
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 4
- 239000000178 monomer Substances 0.000 claims abstract description 4
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 claims abstract description 3
- GOOHAUXETOMSMM-UHFFFAOYSA-N Propylene oxide Chemical compound CC1CO1 GOOHAUXETOMSMM-UHFFFAOYSA-N 0.000 claims abstract description 3
- 238000010107 reaction injection moulding Methods 0.000 claims abstract description 3
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims abstract description 3
- 229920002554 vinyl polymer Polymers 0.000 claims abstract description 3
- 239000007809 chemical reaction catalyst Substances 0.000 claims description 6
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 3
- 230000000379 polymerizing effect Effects 0.000 claims description 3
- 239000004721 Polyphenylene oxide Substances 0.000 abstract description 15
- 229920000570 polyether Polymers 0.000 abstract description 15
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 abstract description 8
- 239000004604 Blowing Agent Substances 0.000 abstract description 6
- 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 abstract description 5
- 239000003054 catalyst Substances 0.000 abstract description 2
- 229920000578 graft copolymer Polymers 0.000 abstract description 2
- 125000002924 primary amino group Chemical class [H]N([H])* 0.000 abstract description 2
- 238000007259 addition reaction Methods 0.000 abstract 1
- 238000010559 graft polymerization reaction Methods 0.000 abstract 1
- -1 hydrogen compound Chemical class 0.000 abstract 1
- 210000003491 skin Anatomy 0.000 description 11
- 239000000203 mixture Substances 0.000 description 5
- 241000288673 Chiroptera Species 0.000 description 4
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 4
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 description 2
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 description 2
- WERYXYBDKMZEQL-UHFFFAOYSA-N butane-1,4-diol Chemical compound OCCCCO WERYXYBDKMZEQL-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 235000013772 propylene glycol Nutrition 0.000 description 2
- VOZKAJLKRJDJLL-UHFFFAOYSA-N tolylenediamine group Chemical group CC1=C(C=C(C=C1)N)N VOZKAJLKRJDJLL-UHFFFAOYSA-N 0.000 description 2
- IMNIMPAHZVJRPE-UHFFFAOYSA-N triethylenediamine Chemical compound C1CN2CCN1CC2 IMNIMPAHZVJRPE-UHFFFAOYSA-N 0.000 description 2
- DNIAPMSPPWPWGF-VKHMYHEASA-N (+)-propylene glycol Chemical compound C[C@H](O)CO DNIAPMSPPWPWGF-VKHMYHEASA-N 0.000 description 1
- DNIAPMSPPWPWGF-GSVOUGTGSA-N (R)-(-)-Propylene glycol Chemical compound C[C@@H](O)CO DNIAPMSPPWPWGF-GSVOUGTGSA-N 0.000 description 1
- YPFDHNVEDLHUCE-UHFFFAOYSA-N 1,3-propanediol Substances OCCCO YPFDHNVEDLHUCE-UHFFFAOYSA-N 0.000 description 1
- PISLZQACAJMAIO-UHFFFAOYSA-N 2,4-diethyl-6-methylbenzene-1,3-diamine Chemical compound CCC1=CC(C)=C(N)C(CC)=C1N PISLZQACAJMAIO-UHFFFAOYSA-N 0.000 description 1
- DSKYSDCYIODJPC-UHFFFAOYSA-N 2-butyl-2-ethylpropane-1,3-diol Chemical compound CCCCC(CC)(CO)CO DSKYSDCYIODJPC-UHFFFAOYSA-N 0.000 description 1
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 1
- UEEJHVSXFDXPFK-UHFFFAOYSA-N N-dimethylaminoethanol Chemical compound CN(C)CCO UEEJHVSXFDXPFK-UHFFFAOYSA-N 0.000 description 1
- 229920002323 Silicone foam Polymers 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- ZJCCRDAZUWHFQH-UHFFFAOYSA-N Trimethylolpropane Chemical compound CCC(CO)(CO)CO ZJCCRDAZUWHFQH-UHFFFAOYSA-N 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- BMRWNKZVCUKKSR-UHFFFAOYSA-N butane-1,2-diol Chemical compound CCC(O)CO BMRWNKZVCUKKSR-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 229960002887 deanol Drugs 0.000 description 1
- 239000012972 dimethylethanolamine Substances 0.000 description 1
- SZXQTJUDPRGNJN-UHFFFAOYSA-N dipropylene glycol Chemical compound OCCCOCCCO SZXQTJUDPRGNJN-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 210000002615 epidermis Anatomy 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 235000011187 glycerol Nutrition 0.000 description 1
- XXMIOPMDWAUFGU-UHFFFAOYSA-N hexane-1,6-diol Chemical compound OCCCCCCO XXMIOPMDWAUFGU-UHFFFAOYSA-N 0.000 description 1
- OHMBHFSEKCCCBW-UHFFFAOYSA-N hexane-2,5-diol Chemical compound CC(O)CCC(C)O OHMBHFSEKCCCBW-UHFFFAOYSA-N 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 239000006082 mold release agent Substances 0.000 description 1
- SLCVBVWXLSEKPL-UHFFFAOYSA-N neopentyl glycol Chemical compound OCC(C)(C)CO SLCVBVWXLSEKPL-UHFFFAOYSA-N 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 150000002902 organometallic compounds Chemical class 0.000 description 1
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 description 1
- 229920000768 polyamine Polymers 0.000 description 1
- 229920000166 polytrimethylene carbonate Polymers 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 239000013514 silicone foam Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 150000003512 tertiary amines Chemical group 0.000 description 1
- KSBAEPSJVUENNK-UHFFFAOYSA-L tin(ii) 2-ethylhexanoate Chemical compound [Sn+2].CCCCC(CC)C([O-])=O.CCCCC(CC)C([O-])=O KSBAEPSJVUENNK-UHFFFAOYSA-L 0.000 description 1
- CYRMSUTZVYGINF-UHFFFAOYSA-N trichlorofluoromethane Chemical compound FC(Cl)(Cl)Cl CYRMSUTZVYGINF-UHFFFAOYSA-N 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
- C08G18/66—Compounds of groups C08G18/42, C08G18/48, or C08G18/52
- C08G18/6666—Compounds of group C08G18/48 or C08G18/52
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Polyurethanes Or Polyureas (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
Abstract
Description
本発明は、ステアリングホイール、ホーンバット、クラ
ッシュバット、アームレスト、グラブボックス等の自動
車内装材や家具用椅子のアームレスト等に用いられるイ
ンテグラルスキンポリウレタン成形品の製造方法に関す
る。The present invention relates to a method for manufacturing an integral skin polyurethane molded product used for automobile interior materials such as steering wheels, horn bats, crash bats, armrests, and glove boxes, armrests of furniture chairs, and the like.
ポリエーテルポリオールまたはポリマーポリオールおよ
び架橋剤を、有機発泡剤と反応触媒の存在下に、芳香族
ポリイソシアネートと反応させてインテグラルスキンポ
リウレタン成形品を製造することは、持分１ｆｌ ５５
−２１０４５号公報や特公昭５５−２７０９８号公報に
記載されている。
一方、表面が柔軟なインテグラルスキンポリウレタン成
形品を製造するために、反応性が異なる２種のポリエー
テルポリオールと架橋剤に発泡剤として不活性気化剤を
組み合わせることは、特公昭６３−１６４０７号公報に
記載されている。The production of integral skin polyurethane moldings by reacting a polyether polyol or a polymer polyol and a crosslinking agent with an aromatic polyisocyanate in the presence of an organic blowing agent and a reaction catalyst is based on equity 1 fl 55
It is described in Japanese Patent Publication No. 21045-21045 and Japanese Patent Publication No. 55-27098. On the other hand, Japanese Patent Publication No. 63-16407 describes the combination of two types of polyether polyols with different reactivities and a crosslinking agent with an inert vaporizing agent as a blowing agent in order to produce an integral skin polyurethane molded product with a flexible surface. It is stated in the official gazette.
しかしながら、緻密な表皮層を得るためには、３０°Ｃ
〜６０“Ｃの比較的低い型温で成形する必要がある。ま
た低い型温で成形すると硬化速度は遅くなる。硬化速度
を速くするために反応触媒量を多くすると、硬化速度は
速くなるが、流れ性が慝くなり、流れ端部に近い成形品
のコアあるいは表皮層に、ボイドまたはピンホールが多
発し、成形品の表面状態や機械的物性は必ずしも満足す
べきものであるとは言えない。
本発明者らは、これらの課題を解決するために鋭意検討
を重ねた結果、特定のポリエーテルポリオールまたはそ
のグラフト重合体と発泡剤としてモノクロロジフルオロ
メタンを組み合せることにより製造されるインテグラル
スキンポリウレタン成形品は、成形品の表面状態および
機械的物性が良好であることを見い出し、本発明を完成
した。
［課題を解決するための手段］
本発明は、２〜４官能の活性水素含有化合物にプロピレ
ンオキシド（以下、ＰＯという）とエチレンオキシド（
以下、ＥＯという）を付加した分子量が２０００〜８０
００であり、末端１級化率が９０％以上であるポリエー
テルポリオールまたはこれにとニルモノマーをグラフト
重合したポリマーポリオールおよび架橋剤をモノクロロ
ジフルオロメタンと反応触媒の存在下に、芳香族ポリイ
ソシアネートと反応射出成形方法（以下、ＲＩＭ法とい
う）により反応させることよりなるインテグラルスキン
ポリウレタン成形品の製造方法に関する。
ポリエーテルポリオールは、プロピレングリコール、グ
リセリン、 トリメチロールプロパン、 トリエタノー
ルアミン、ペンタエリスリトール等の２〜４官能の低分
子量のアルコールまたはエチレンジアミン、トリレンジ
アミン等の低分子量のアミノ化合物である活性水素含有
化合物にＰＯとＥＯを付加した分子量が２０００〜８０
００であり、末端１級化率が９０％以上のものである。
ポリマーポリオールは、このポリエーテルポリオールに
スチレン、アクリロニトリル等のビニルモノマーをグラ
フト重合したものである。
架橋剤は、エチレングリコール、 １，３−プロパンジ
オール、１，２−プロパンジオール、ｌ、４−ブタンジ
オール、１．２−ブタンジオール、２゜３−ブタンジオ
ール、１．５−ベンタンジオール、１．６−ヘキサンジ
オール、２．５−ヘキサンジオール、１．７−へ１タン
ジオール、１．８−オクタンジオール、 １．１ｏ−デ
カンシール、ジエチレングリコール、ジプロピレングリ
コール、ネオペンチルグリコール、２−エチル−２−ｎ
−ブチル−１，３−プロパンジオール、２． ２． ４
−トリメチル−１，３−ベンタンジオール等のグリコー
ル、 トリエタノールアミン、ジェタノールアミン、Ｎ
−メチルジェタノールアミン等のアミノアルコール、エ
チレンジアミン、トリレンジアミン、ジエチルトルエン
ジアミン等のジアミノやそれらにＥＯやＰＯを付加した
ＯＨ価が２５０〜９ｏ。
Ｍ ＫＯＨ／ ｇのポリエーテルポリオールまたはポリ
アミンであり、ポリエーテルポリオールまたはポリマー
ポリオール１００重量部に対して、１〜２０重量部用い
られる。
反応触媒は、 トリエチレンジアミン、ジメチルエタノ
ールアミン等の第３級アミンやオクタン酸錫、ジプチル
錫ジラウレート等の有機金属化合物であり、ポリエーテ
ルポリオールまたはポリマーポリオール１００重量部に
対して、０．１〜３． ０重量部用いられる。
芳香族ポリイソシアネートは、ジフェニルメタンジイソ
シアネート（以下、ＭＤＩという）、ＭＤＩとその同族
体との混合物、これらをグリコール等の多官能性水酸基
含有化合物と反応したりカルボジイミド化した変性ＭＤ
Ｉ等である。
発泡剤であるモノクロロジフルオロメタンの添加量は、
ポリエーテルポリオールまたはポリマーポリオール１０
０重量部に対して、１〜６重量部であり、目的のインテ
グラルスキンポリウレタン成形品の平均密度に合わせて
調整される。
発泡助剤として、モノクロロジフルオロメタンに、極少
量の水を併用してもよいし、ポリエーテルポリオールま
たはポリマーポリオールに空気あるいは窒素のような不
活性ガスを混入して用いてもよい。
ポリエーテルポリオールまたはポリマーポリオールに必
要に応じ加えられるものとして、有機シリコーン系整泡
剤、着色剤、内部離型剤、酸化防止剤等がある。
ポリエーテルポリオールまたはポリマーポリオールおよ
び架橋剤と芳香族ポリイソシアネートとの反応は、モノ
クロロジフルオロメタンと反応触媒の存在下に、インシ
アネート基と活性水素含有基との当量比（以下、当量比
という）が０．８〜１．５になるようにしてＲＩＭ法に
より行われる。
［実施例１
ポリエーテルポリオールと架橋剤と反応触媒とからなる
混合液に、モノクロロジフルオロメタンを加え、常温常
圧で撹拌してポリオール組成物を得た。
このポリオール組成物とグリコール変性ＭＤＩを当量比
が１．０５になるように、それぞれ高圧反応射出成形機
の原料タンクに仕込み、４０℃に保温し、吐出圧を１８
０ ｋｇ／ｃｍ”に設定した。
ついでこれを厚み６ ｍ、 輻３００關、長さ９００
關で型温を５０°Ｃに設定したスチール製の密閉金型に
注入した。
注入後５分で脱型して、インテグラルスキンポリウレタ
ン成形品を得た。
成形品の表面状態を、上面表皮層中にある０、３〜０．
５關径の平均ボイド数／Ｃ璽２でしらべた。機械的物性
は、成形品の平均密度、引張強度および成形収縮率でし
らべた。結果を第１表に示す。
比較例として、モノクロロジフルオロメタンの代わりに
モノフルオロトリクロロメタンを用いる以外はすべて実
施例と同様にしてインテグラルスキンポリウレタン成形
品を得、その表面状態や機械的物性をしらべた。結果を
第１表に示す。
以下余白
【発明の効果］
本発明の製造方法により得られるインテグラルスキンポ
リウレタン成形品は、表皮層のボイド数が少なく、引張
強度が大きく、成形収縮率が小さく、表面状態および機
械的物性のいずれの面でも従来品に比べて優れている。
従って、ステアリングホイール、ホーンバット、クラッ
シュバット、アームレスト、グラブボックス等の自動車
内装材や家具用椅子のアームレスト等に広く用いること
ができる。
以上However, in order to obtain a dense epidermal layer, it is necessary to
It is necessary to mold at a relatively low mold temperature of ~60"C. Also, molding at a low mold temperature will slow down the curing speed. If the amount of reaction catalyst is increased to speed up the curing speed, the curing speed will increase, but , flowability becomes poor, voids or pinholes occur frequently in the core or skin layer of the molded product near the flow end, and the surface condition and mechanical properties of the molded product are not necessarily satisfactory. As a result of intensive studies to solve these problems, the present inventors have developed an integral skin produced by combining a specific polyether polyol or its graft polymer with monochlorodifluoromethane as a blowing agent. The present invention has been completed based on the discovery that polyurethane molded products have good surface conditions and mechanical properties. [Means for Solving the Problems] Propylene oxide (hereinafter referred to as PO) and ethylene oxide (
The molecular weight after adding EO (hereinafter referred to as EO) is 2000 to 80.
00 and a terminal primaryization rate of 90% or more, or a polymer polyol obtained by graft polymerizing a nyl monomer thereto and a crosslinking agent, and a crosslinking agent are reacted with monochlorodifluoromethane. In the presence of a catalyst, react with an aromatic polyisocyanate. The present invention relates to a method for producing an integral skin polyurethane molded article, which involves reaction using an injection molding method (hereinafter referred to as RIM method). Polyether polyols are active hydrogen-containing compounds that are di- to tetrafunctional low-molecular-weight alcohols such as propylene glycol, glycerin, trimethylolpropane, triethanolamine, and pentaerythritol, or low-molecular-weight amino compounds such as ethylenediamine and tolylenediamine. The molecular weight of adding PO and EO to is 2000-80
00, and the terminal primaryization rate is 90% or more. Polymer polyol is obtained by graft polymerizing vinyl monomers such as styrene and acrylonitrile to this polyether polyol. The crosslinking agent is ethylene glycol, 1,3-propanediol, 1,2-propanediol, 1,4-butanediol, 1,2-butanediol, 2゜3-butanediol, 1,5-bentanediol, 1 .6-hexanediol, 2.5-hexanediol, 1.7-hexanediol, 1.8-octanediol, 1.1o-decanediol, diethylene glycol, dipropylene glycol, neopentyl glycol, 2-ethyl-2 -n
-butyl-1,3-propanediol, 2. 2. 4
- Glycols such as trimethyl-1,3-bentanediol, triethanolamine, jetanolamine, N
- Amino alcohols such as methyljetanolamine, diaminos such as ethylene diamine, tolylene diamine, and diethyl toluenediamine, and OH values of EO and PO added to them are 250 to 9o. M KOH/g of polyether polyol or polyamine, used in 1 to 20 parts by weight per 100 parts by weight of polyether polyol or polymer polyol. The reaction catalyst is a tertiary amine such as triethylenediamine or dimethylethanolamine, or an organometallic compound such as tin octoate or diptyltin dilaurate, and is used in an amount of 0.1 to 3 parts by weight per 100 parts by weight of polyether polyol or polymer polyol. ．． 0 parts by weight are used. Aromatic polyisocyanates include diphenylmethane diisocyanate (hereinafter referred to as MDI), mixtures of MDI and its homologs, and modified MD obtained by reacting these with polyfunctional hydroxyl group-containing compounds such as glycol or carbodiimidating them.
I etc. The amount of monochlorodifluoromethane added, which is a blowing agent, is
Polyether polyol or polymer polyol 10
The amount is 1 to 6 parts by weight relative to 0 parts by weight, and is adjusted according to the average density of the desired integral skin polyurethane molded product. As a foaming aid, monochlorodifluoromethane may be used in combination with a very small amount of water, or a polyether polyol or polymer polyol may be mixed with air or an inert gas such as nitrogen. Things that may be added to the polyether polyol or polymer polyol as necessary include an organic silicone foam stabilizer, a coloring agent, an internal mold release agent, and an antioxidant. The reaction of the polyether polyol or polymer polyol and the crosslinking agent with the aromatic polyisocyanate is carried out in the presence of monochlorodifluoromethane and a reaction catalyst so that the equivalent ratio of incyanate groups to active hydrogen-containing groups (hereinafter referred to as equivalent ratio) is The RIM method is used to adjust the ratio to 0.8 to 1.5. [Example 1] Monochlorodifluoromethane was added to a mixed solution consisting of a polyether polyol, a crosslinking agent, and a reaction catalyst, and the mixture was stirred at room temperature and pressure to obtain a polyol composition. This polyol composition and glycol-modified MDI were charged into the raw material tank of a high-pressure reaction injection molding machine at an equivalent ratio of 1.05, kept at 40°C, and the discharge pressure was adjusted to 18°C.
The thickness was set to 6 m, the radius was 300 mm, and the length was 900 mm.
The mixture was poured into a closed steel mold with a mold temperature of 50°C. The mold was removed 5 minutes after injection to obtain an integral skin polyurethane molded product. The surface condition of the molded product is determined by the range of 0,3 to 0.
The average number of voids for 5 diameters/C2 was investigated. The mechanical properties were determined by the average density, tensile strength, and molding shrinkage of the molded product. The results are shown in Table 1. As a comparative example, an integral skin polyurethane molded product was obtained in the same manner as in the example except that monofluorotrichloromethane was used instead of monochlorodifluoromethane, and its surface condition and mechanical properties were examined. The results are shown in Table 1. The following margin [Effects of the invention] The integral skin polyurethane molded product obtained by the production method of the present invention has a small number of voids in the skin layer, high tensile strength, low mold shrinkage, and has excellent surface condition and mechanical properties. It is also superior to conventional products in terms of Therefore, it can be widely used for automobile interior materials such as steering wheels, horn bats, crash bats, arm rests, and glove boxes, arm rests of furniture chairs, and the like. that's all
Claims (1)
シドとエチレンオキシドを付加した分子量が２０００〜
８０００であり、末端１級化率が９０％以上であるポリ
エーテルポリオールまたはこれにビニルモノマーをグラ
フト重合したポリマーポリオールおよび架橋剤を、モノ
クロロジフルオロメタンと反応触媒の存在下に、芳香族
ポリイソシアネートと反応射出成形方法により反応させ
ることよりなるインテグラルスキンポリウレタン成形品
の製造方法。The molecular weight of propylene oxide and ethylene oxide added to a mono-, di- to tetra-functional active hydrogen-containing compound is 2000~
8000 and a terminal primaryization rate of 90% or more, or a polymer polyol obtained by graft polymerizing a vinyl monomer thereto, and a crosslinking agent, are mixed with an aromatic polyisocyanate in the presence of monochlorodifluoromethane and a reaction catalyst. A method for producing an integral skin polyurethane molded product, which comprises reacting by a reaction injection molding method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11770089A JPH02296815A (en) | 1989-05-11 | 1989-05-11 | Production of integral-skin polyurethane molding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11770089A JPH02296815A (en) | 1989-05-11 | 1989-05-11 | Production of integral-skin polyurethane molding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02296815A true JPH02296815A (en) | 1990-12-07 |
Family
ID=14718141
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11770089A Pending JPH02296815A (en) | 1989-05-11 | 1989-05-11 | Production of integral-skin polyurethane molding |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02296815A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52142797A (en) * | 1976-05-21 | 1977-11-28 | Bayer Ag | Process for manufacturing elastic object |
| JPS5457598A (en) * | 1977-09-29 | 1979-05-09 | Union Carbide Corp | Thermoplastic polyether polyurethane elastmor |
| JPS60252612A (en) * | 1984-05-29 | 1985-12-13 | Sanyo Chem Ind Ltd | Polymeric polyol composition and its use |
-
1989
- 1989-05-11 JP JP11770089A patent/JPH02296815A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52142797A (en) * | 1976-05-21 | 1977-11-28 | Bayer Ag | Process for manufacturing elastic object |
| JPS5457598A (en) * | 1977-09-29 | 1979-05-09 | Union Carbide Corp | Thermoplastic polyether polyurethane elastmor |
| JPS60252612A (en) * | 1984-05-29 | 1985-12-13 | Sanyo Chem Ind Ltd | Polymeric polyol composition and its use |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR100210563B1 (en) | An isocyanate-terminated prepolymer and flexible polyurethane foam prepared therefrom | |
| DE69114621T2 (en) | Process for the production of moldings provided with an integral polyurethane outer layer and moldings produced in this way. | |
| CN111718462B (en) | Self-skinning polyurethane foam rapid demoulding composition for automobile steering wheel and preparation method thereof | |
| JPH0324108A (en) | Manufacture of foam with skin layer | |
| US3865762A (en) | Flexible polyurethane foams prepared by the using a mixture of polyether-polyols and mixture of polyisocyanates | |
| JP2000515893A (en) | Alkanolamine / carbon dioxide adduct and polyurethane foam | |
| CN111607061B (en) | Flame retardant-free high-flame-retardance low-odor full-water self-skinning polyurethane foam and preparation method thereof | |
| US5084486A (en) | Reactive feed stream to replace inert blowing agent feed stream in a polyurethane foam process | |
| CN105294991A (en) | Cold cure high resilient foam and preparation method | |
| JPH04227619A (en) | Production of flexible polyurethane foam excellent in gas diffusibility | |
| JPS62177013A (en) | Production of polyurethane foam | |
| EP0902039B1 (en) | Polyurea foam made from a partially aminated polyether polyamine | |
| CN1341132A (en) | Process for making microcellular polyurethane elastomers with improved processability | |
| JPH072971A (en) | Production of integral-skin-clad polyurethane foam | |
| JPH04185627A (en) | Flexible polyurethane form | |
| JPH02296815A (en) | Production of integral-skin polyurethane molding | |
| JPH01110521A (en) | Production of polyurethane urea elastomer | |
| JP2000336138A (en) | Production of reaction injection molded polyurethane foam | |
| JP3937811B2 (en) | Method for producing flexible polyurethane foam | |
| JP3311388B2 (en) | Manufacturing method of polyurethane foam with integral skin | |
| JP3780522B2 (en) | Method for producing flexible polyurethane foam for automobile seat cushion | |
| JPS6131421A (en) | Production of polyurethane resin | |
| JP3214781B2 (en) | Method for producing flexible polyurethane foam | |
| JPS5925810A (en) | Preparation of flexible polyurethane foam | |
| JPH06271643A (en) | Production of polyurethane foam |