Raw materials for producing polyurethane can be purchased there
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Our company is working on a project to produce polyurethane, but we don’t know where we can purchase the raw materials. I hope you can help us out
Here are a few recommendations: the polyester polyols used by our company are supplied by Yantai Huada Chemical, while the MDI comes from Yantai Wanhua; TDI is imported. MDI is abbreviated as HMDI – hydrogenated MDI, DMDI, H12MDI. The chemical name is 4,4′-dicyclohexylmethane diisocyanate. Its molecular formula is C15H12N2O2, with a relative molecular mass of 262.35. The CAS number is 5124-30-1. Physical properties of H12MDI: H12MDI may crystallize at temperatures below 25°C. The NCO mass fraction of H12MDI: 31.8~32.0%. Purity: ≥99.5%
Total chlorine content: ≤1000ppm
Hydrolyzed chlorine: ≤10ppm
Density: Approximately 1.07 g/cm3
Viscosity: Approximately 30 Mpa.s
Color (Hazen): ≤30
Refractive index: Approximately 1.496
Vapor pressure: 0.002 Pa
Flash point: Approximately 201°C
Melting point: Approximately 25°C
Uses of H12MDI: It can be used to produce polyurethane products that do not yellow over time; it is suitable for manufacturing polyurethane materials with excellent light stability, weather resistance, and mechanical properties. It is particularly useful in the production of polyurethane elastomers, water-based polyurethanes, fabric coatings, and radiation-cured polyurethane acrylate coatings. In addition to its excellent mechanical properties, H12MDI also confers outstanding hydrolysis resistance and chemical resistance to the resulting products. Bayer’s H12MDI: used for UV curing, for high-quality applications where yellowing resistance is important, in water-based polyurethanes (PU), for curing in humid conditions, in synthetic leather, as a coating agent for leather, in bras and cushions, for surface treatments, in RIM polyurethanes, and for coating fabrics. Overview of TDI: Toluene diisocyanate, abbreviated as TDI. TDI has two isomers: 2,4-TDI and 2,6-TDI. The industrial product is mainly a mixture in a mass ratio of 80:20 (TDI-80 or TDI-80/20), as well as pure 2,4-TDI (also known as TDI-100) and TDI-65 (a mixture of the two isomers in a mass ratio of 65:35). The CAS number for TDI (a mixture of isomers) is 26471-62-5; the CAS number for 2,4-TDI is 584-84-9, and the CAS number for 2,6-TDI is 91-08-7. At room temperature, TDI is a transparent liquid that is colorless or pale yellow, with a distinctive pungent odor; its color deepens when exposed to light. Insoluble in water, soluble in propane, ethyl acetate, toluene, and halogenated hydrocarbons. TDI-80 will form white crystals when stored at temperatures below 10°C. The TDI product of Dow Chemical is branded as Voranate T-80. BASF’s product with the grade Lupranate T80-2 is a high-acidity TDI product. KFC Korea’s TDI-100 has a TDI purity of ≥99.7%, 2,4-TDI content of ≥98%, 2,6-TDI content of ≤2%, acidity (HCl) of ≤0.002%, hydrolyzed chlorides of ≤0.005%, and total chloride content of ≤0.018%. Special and application-specific toluene diisocyanate is the most important diisocyanate product for polyurethane synthesis, and it is widely used in soft polyurethane foams, coatings, elastomers, adhesives, sealants, and other polyurethane products. TDI is an aromatic diisocyanate with higher reactivity than softer aliphatic isocyanates. TDI itself and its polyurethane products tend to yellow when exposed to natural light over time. The NCO groups present in TDI are highly reactive and readily react with water, alcohols, amines, etc.; under certain conditions they can undergo self-polymerization. These reactions can be catalyzed by basic substances and many transition metal compounds. Improper handling can lead to rapid heat release and temperature increases, resulting in quality or safety hazards, so care must be taken. Among TDI industrial products, TDI-80 is the most widely used and in the largest quantities; TDI-100 has a regular structure and can be used to synthesize special prepolymers, primarily for polyurethane elastomers ； TDI-65 is mainly used in polyester polyurethane foam plastics and similar materials. Manufacturers include Hebei Cangzhou Dahuata TDI Co., Ltd., Gansu Yinguang Chemical TDI Industrial Company (Gansu Yinguang Juyin Chemical Co., Ltd.), Shanxi Taiyuan Lanxing TDI Chemical Co., Ltd., Bayer MaterialScience of Germany for TDI, BASF of Germany for TDI, Lyondell Chemical of the United States for TDI, Dow Chemical of the United States for TDI, Mitsui Takeda TDI Chemical Co., Ltd. of Japan, Korea Fine TDI Chemical Company (KFC), Korea Oriental TDI Chemical Company (OCT), Polyurethane Industry Co., Ltd. of Japan for TDI, Borsodchem of Hungary for TDI, Rhodia of France for TDI, Zaklady Chemical of Poland for TDI, Rubicon Chemical of the United States for TDI, Narmada Petrochemicals of India for TDI, Hindustan Inorganic Company of India for TDI, and others.
Total chlorine content: ≤1000ppm
Hydrolyzed chlorine: ≤10ppm
Density: Approximately 1.07 g/cm3
Viscosity: Approximately 30 Mpa.s
Color (Hazen): ≤30
Refractive index: Approximately 1.496
Vapor pressure: 0.002 Pa
Flash point: Approximately 201°C
Melting point: Approximately 25°C
Uses of H12MDI: It can be used to produce polyurethane products that do not yellow over time; it is suitable for manufacturing polyurethane materials with excellent light stability, weather resistance, and mechanical properties. It is particularly useful in the production of polyurethane elastomers, water-based polyurethanes, fabric coatings, and radiation-cured polyurethane acrylate coatings. In addition to its excellent mechanical properties, H12MDI also confers outstanding hydrolysis resistance and chemical resistance to the resulting products. Bayer’s H12MDI: used for UV curing, for high-quality applications where yellowing resistance is important, in water-based polyurethanes (PU), for curing in humid conditions, in synthetic leather, as a coating agent for leather, in bras and cushions, for surface treatments, in RIM polyurethanes, and for coating fabrics. Overview of TDI: Toluene diisocyanate, abbreviated as TDI. TDI has two isomers: 2,4-TDI and 2,6-TDI. The industrial product is mainly a mixture in a mass ratio of 80:20 (TDI-80 or TDI-80/20), as well as pure 2,4-TDI (also known as TDI-100) and TDI-65 (a mixture of the two isomers in a mass ratio of 65:35). The CAS number for TDI (a mixture of isomers) is 26471-62-5; the CAS number for 2,4-TDI is 584-84-9, and the CAS number for 2,6-TDI is 91-08-7. At room temperature, TDI is a transparent liquid that is colorless or pale yellow, with a distinctive pungent odor; its color deepens when exposed to light. Insoluble in water, soluble in propane, ethyl acetate, toluene, and halogenated hydrocarbons. TDI-80 will form white crystals when stored at temperatures below 10°C. The TDI product of Dow Chemical is branded as Voranate T-80. BASF’s product with the grade Lupranate T80-2 is a high-acidity TDI product. KFC Korea’s TDI-100 has a TDI purity of ≥99.7%, 2,4-TDI content of ≥98%, 2,6-TDI content of ≤2%, acidity (HCl) of ≤0.002%, hydrolyzed chlorides of ≤0.005%, and total chloride content of ≤0.018%. Special and application-specific toluene diisocyanate is the most important diisocyanate product for polyurethane synthesis, and it is widely used in soft polyurethane foams, coatings, elastomers, adhesives, sealants, and other polyurethane products. TDI is an aromatic diisocyanate with higher reactivity than softer aliphatic isocyanates. TDI itself and its polyurethane products tend to yellow when exposed to natural light over time. The NCO groups present in TDI are highly reactive and readily react with water, alcohols, amines, etc.; under certain conditions they can undergo self-polymerization. These reactions can be catalyzed by basic substances and many transition metal compounds. Improper handling can lead to rapid heat release and temperature increases, resulting in quality or safety hazards, so care must be taken. Among TDI industrial products, TDI-80 is the most widely used and in the largest quantities; TDI-100 has a regular structure and can be used to synthesize special prepolymers, primarily for polyurethane elastomers ； TDI-65 is mainly used in polyester polyurethane foam plastics and similar materials. Manufacturers include Hebei Cangzhou Dahuata TDI Co., Ltd., Gansu Yinguang Chemical TDI Industrial Company (Gansu Yinguang Juyin Chemical Co., Ltd.), Shanxi Taiyuan Lanxing TDI Chemical Co., Ltd., Bayer MaterialScience of Germany for TDI, BASF of Germany for TDI, Lyondell Chemical of the United States for TDI, Dow Chemical of the United States for TDI, Mitsui Takeda TDI Chemical Co., Ltd. of Japan, Korea Fine TDI Chemical Company (KFC), Korea Oriental TDI Chemical Company (OCT), Polyurethane Industry Co., Ltd. of Japan for TDI, Borsodchem of Hungary for TDI, Rhodia of France for TDI, Zaklady Chemical of Poland for TDI, Rubicon Chemical of the United States for TDI, Narmada Petrochemicals of India for TDI, Hindustan Inorganic Company of India for TDI, and others.
Where are you from? Huludao has polyethers and TDI available for purchase, as well as some technologies
Yantai Wanhua is the best in China. World-class quality
When it comes to polyethers, Takahashi Petrochemical is the best choice without a doubt.
Is the original poster in the polyurethane resin business? We specialize in online monitoring and control of resins, such as conducting online tests on viscosity, degree of polymerization, conversion rate, molecular weight, and other parameters. If you need anything, feel free to contact the Online Testing Project Team at Shanghai Jiao Tong University; add me on QQ, it’s listed in my profile.
This post was last edited by Oath-taking on 2011-10-14 at 11:33. Our company is involved in the trade of such raw materials; everyone is welcome to exchange ideas~