polyurethane

Polyurethane foam / polyurethane insulator / polyurethane adalah / polyurethane film / polyurethane coating /

Polyurethane Foam

polyurethane foam terdiri dari beberapa material kimia yang direaksikan sehingga terbentuk lah busa atau yang lebih dikenal polyurethane

 

Jual Busa Peredam Polyurethane Foam (Rigid Foam)

Busa peredam suara PU Foam (Polyurethane Foam)

Busa Polyurethane Foam  ini sangan efektif sekali digunakan untuk peredam suara, panas.

Polyurethane foam ini memiliki daya redam paling tinggi dibandingkan dengan peredam yang lain.

 

Beberapa aplikasi peredam yang menggunkan Polyurethane Foam ini sebagai berikut

1. Studio Musik

Beberapa studio musik ini mulai beralih ke Polyurethane foam karena polyurethane foam selain sebagai peredam dia bisa menghasilkan akustik yang suara yang bagus sehingga cocok sekali digunakan untuk peredam studio musik tersebut.

Aplikasi pemakaian busa polyurethane foam ini dipasang pada posisi dalem gipsum, polyurethane foam ini sebagai pengganti glass wool, rok wool dan yang lain. pastikan studio musik anda menggunakan kwalitas peredam yang bagus. setelah menggunakan polyurethane foam ini posisi luar ditambah dengan busa telur akan menghasilkan akustik suara  bagus dan redaman suara keluar seminimum mungkin.

2. Get Set

Untuk meredamkan suara genset sangat cocok menggunkan busa polyurethane yang mana suara dan panas yang dihasilkan dari genset tidak dapat merambak keluar secara maxsimal. setelah menggunakan polyurethane foam ini posisi luar ditambah dengan busa telur akan menghasilkan kedap suara dan panas maximal.

3. Box Vaksin

box vaksin ini memerlukan kesetabilan suhu minus derajat sehingga Polyurethane lah yang paling cocok digunakan untuk menahan temperatur tertentu sehingga suhu dalam box stabil

4. Headlining mobil (atap mobil)

dalam dunia automotif headlining berbagai kendaraan mewah menggunkan Polyurethane yang mana polyurethane ini dapat meredam panas dan suara sehingga kenyamaman mobil dapat terpenuhi. teknologi terbaru belum ada yang menemukan busa peredam selain dari pada polyurethane ini. sehingga polyurethane ini memiliki daya redam yang sangat tinggi terhadap suara ataupun panas.

 

Dan beberapa aplikasi lain yang menggunkan busa Polyurethane foam ini adalah : Pipa Steam, Cool storage, Kulkas, Mobil cool storage, Genset. inside door dan lain2.

 

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Harga untuk busa Polyurethane foam ini sebagai berikut :

Ukuran 200x100x2 cm Rp 160.000,-

Ukuran 200x100x3 cm Rp 240.000,-

dan kelipatan Rp 80.000,- untuk penambahan harga tiap 1 cm ketebalan.

Ketebalan sesuai dengan permintaan customer

 

A polyurethane (PUR and PU) is polymer composed of a chain of organic units joined by carbamate (urethane) links.

Polyurethane polymers are formed by combining two bi- or higher functional monomers. One contains two or more isocyanate functional groups (with formula –N=C=O) and the other contains two or more hydroxyl groups (with formula –OH). The alcohol and the isocyanate groups combine to form a urethane linkage:

ROH + R’NCO → ROC(O)N(H)R’ (R and R’ are alkyl or aryl groups)

This combining process, sometimes called condensation, typically requires the presence of a catalyst. More complicated monomers are also used.

Polyurethanes are used in the manufacture of flexible, high-resilience foam seating; rigid foam insulation panels; microcellular foam seals and gaskets; durable elastomeric wheels and tires; automotive suspension bushings; electrical potting compounds; high performance adhesives; surface coatings and surface sealants; synthetic fibers (e.g., Spandex); carpet underlay; and hard-plastic parts (e.g., for electronic instruments).

Polyurethane is also used for the manufacture of hoses and skateboard wheels as it combines the best properties of both rubber and plastic.

 

 

Polyurethanes are in the class of compounds called reaction polymers, which include epoxies, unsaturated polyesters, and phenolics.[5][6][7][8][9] A urethane linkage is produced by reacting an isocyanate group, -N=C=O with a hydroxyl (alcohol) group, -OH. Polyurethanes are produced by the polyaddition reaction of a polyisocyanate with a polyalcohol (polyol) in the presence of a catalyst and other additives. In this case, a polyisocyanate is a molecule with two or more isocyanate functional groups, R-(N=C=O)n ≥ 2 and a polyol is a molecule with two or more hydroxyl functional groups, R’-(OH)n ≥ 2. The reaction product is a polymer containing the urethane linkage, -RNHCOOR’-. Isocyanates will react with any molecule that contains an active hydrogen. Importantly, isocyanates react with water to form a urea linkage and carbon dioxide gas; they also react with polyetheramines to form polyureas. Commercially, polyurethanes are produced by reacting a liquid isocyanate with a liquid blend of polyols, catalyst, and other additives. These two components are referred to as a polyurethane system, or simply a system. The isocyanate is commonly referred to in North America as the ‘A-side’ or just the ‘iso’. The blend of polyols and other additives is commonly referred to as the ‘B-side’ or as the ‘poly’. This mixture might also be called a ‘resin’ or ‘resin blend’. In Europe the meanings for ‘A-side’ and ‘B-side’ are reversed. Resin blend additives may include chain extenders, cross linkers, surfactants, flame retardants, blowing agents, pigments, and fillers.

The first essential component of a polyurethane polymer is the isocyanate. Molecules that contain two isocyanate groups are called diisocyanates. These molecules are also referred to as monomers or monomer units, since they themselves are used to produce polymeric isocyanates that contain three or more isocyanate functional groups. Isocyanates can be classed as aromatic, such as diphenylmethane diisocyanate (MDI) or toluene diisocyanate (TDI); or aliphatic, such as hexamethylene diisocyanate (HDI) or isophorone diisocyanate (IPDI). An example of a polymeric isocyanate is polymeric diphenylmethane diisocyanate, which is a blend of molecules with two-, three-, and four- or more isocyanate groups, with an average functionality of 2.7. Isocyanates can be further modified by partially reacting them with a polyol to form a prepolymer. A quasi-prepolymer is formed when the stoichiometric ratio of isocyanate to hydroxyl groups is greater than 2:1. A true prepolymer is formed when the stoichiometric ratio is equal to 2:1. Prepolymers can be used as moisture cure polyurethane. Important characteristics of isocyanates are their molecular backbone, % NCO content, functionality, and viscosity.

The second essential component of a polyurethane polymer is the polyol. Molecules that contain two hydroxyl groups are called diols, those with three hydroxyl groups are called triols, et cetera. In practice, polyols are distinguished from short chain or low-molecular weight glycol chain extenders and cross linkers such as ethylene glycol (EG), 1,4-butanediol (BDO), diethylene glycol (DEG), glycerine, and trimethylolpropane (TMP). Polyols are polymers in their own right. They are formed by base-catalyzed addition of propylene oxide (PO), ethylene oxide (EO) onto a hydroxyl or amine containing initiator, or by polyesterification of a di-acid, such as adipic acid, with glycols, such as ethylene glycol or dipropylene glycol (DPG). Polyols extended with PO or EO are polyether polyols. Polyols formed by polyesterification are polyester polyols. The choice of initiator, extender, and molecular weight of the polyol greatly affect its physical state, and the physical properties of the polyurethane polymer. Important characteristics of polyols are their molecular backbone, initiator, molecular weight, % primary hydroxyl groups, functionality, and viscosity.

PU reaction mechanism catalyzed by a tertiary amine
reaction meachanism
carbon dioxide gas formed by reacting water and isocyanate
water isocyanate reaction

The polymerization reaction is catalyzed by tertiary amines, such as dimethylcyclohexylamine, and organometallic compounds, such as dibutyltin dilaurate or bismuth octanoate. Furthermore, catalysts can be chosen based on whether they favor the urethane (gel) reaction, such as 1,4-diazabicyclo[2.2.2]octane (also called DABCO or TEDA), or the urea (blow) reaction, such as bis-(2-dimethylaminoethyl)ether, or specifically drive the isocyanate trimerization reaction, such as potassium octoate.

 

 

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