Perekat Plastisol Pvc

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Perekat plastisol PVC 1. Plastisol 2. Solvent Cement Organosol 3. Solvent Cement Rigid www.duraposita.com [email protected] [email protected]

1. Plastisol zPlastisol adalah suatu disperse dari resin termoplastis yang sangat lembut dalam cairan, biasanya polyvinyl chloride dalam plasticizer. Hasil pastanya merupakan cairan yang sangat kental, apabila dipanasi akan menjadi homogen sehingga menghasilkan fase padat yang tunggal

Kelebihan plastisol zAplikasinya mudah zKekuatan ikatan moderat – tinggi dapat untuk berbagai substrat zFleksibilitasnya awet maka dapat mengakomodasi gerakan relatif substrat dan bereaksi sebagai peredam zFormulasinya luas, menjadi busa yang lembut sampai padat keras rapat.

Kekurangan Plastisol ztemperatur curing yang tinggi sehingga menyebabkan keterbatasan aplikasinya pada substrat yang sensitif terhadap panas zAda kemungkinan terjadi korosi disebabkan karena pembebasan dari HCL

Type of Polymerization Process

zSuspension z Emulsion

Suspension z Characteristics Involves the free radical catalyzed polymerization of discrete droplets of vinyl chloride monomer suspended in water by agitation. Protective colloids are gelatin, methyl cellulose, polyvinyl chloride, etc.

z Process The suspending agent is dissolved in deionized and deaerated water and added to a glass-lined or stainless reactor. The remainder of the water, catalyst, and other additives are then added. Liquefied monomer is pumped in, and the closed system is then heated to about 50°C and raised to 125 psi. Typical conversion rates are 92-93% and particle sizes are about 100 microns.

Emulsi zCharacteristics Involves the use of surface active agents (emulsifiers) and water soluble catalysts. Although agitation is necessary, the emulsion is stabilized by the surface active agents.

zProcess The process is similar to the suspension polymerization process. At the conclusion of the reaction, unreacted monomer is recovered by vacuum and recycled. The stabilizer like sodium carbonate is then added to the latex, and the latex is spray dried. Particles from the emulsion process are about 1 micron.

Perekat dan sealant PVC plastisol z z z z

PVC resins ( Asahi type C 150 s ) Plasticizers ( e.g.DOP, DBP dll ) Inert filler (e.g., calcium carbonate) Heat stabilizers ( e.g.epon 28, lead, cadmium, sabun alkalin, basic lead compound, organo tin compound ) z Acid scavengers ( e.g. Calcium carbonate ) z Adhesion promoters ( e.g. MgO, CaO )

Formulasi Plastisol dan sealant Component PVC polymer(s) Plasticizer(s) Precipitated calcium carbonate Ground calcium chloride

Parts by Weight 25 36 20 12

Other additives including: Adhesion promoters Hydrocarbon oils Heat stabilizer Acid scavenger

7

Aplikasi z Sealing panel z Sealing deck otomotif z Asembling ( filter oli, alkohol dll)

2. Solvent Cement Organosol z Seperti juga plastisol hanya ada penambahan solvent sebagai thinner z Sebagai jawaban masalah fluiditas plastisol yang sangat kental. z Keunggulan sistem non volatile menjadi hilang

Formulasi solvent cement organosol Komposisi Pvc resin Cyclo Hexanone MEK DOP MIBK

Berat 50 250 100 10 12.5

Aplikasi zPerekat untuk bahan bersifat fleksibel mis Sol sepatu pvc, Panel dll

3. Solvent Cement z Merupakan bahan yang digunakan untuk menggabungkan plastik substrat dengan formulasi solvent. z Mengandung bahan kimia yang dapat melarutkan PVC atau bahan plastik yang lain z Apabila pelarut menguap, meninggalkan PVC resin yang akan menggabungkan dua permukaan PVC

Formulasi Component PVC resin CycloHexanone MEK

Parts by Weight 25 100 – 150 75

Aplikasi zPerekat untuk barang dari bahan PVC mis pipa, lembaran, talang dll

Reference 1. 2. 3. 4. 5. 6. 7. 8.

www.specialchem4adhesive.com www.duraposita.com www.freepatentsonline.com Adhesive technology, marcia gutcho, noyes data corp 1983 PVC Plastik, W V Titow, Elseiver Aplied Scince Handbook of adhesives, SBP Board Consultant n engineer, Adhesive and sealant, David lammas,argus books 1991 Yellow Pages

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