05-02-2012, 08:31 PM
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Member
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Join Date: Jul 1999
Location: Taint of creation
Posts: 28,342
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See Pressure-sensitive adhesive
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Composition
PSAs are usually based on an elastomer compounded with a suitable tackifier (e.g., a rosin ester). The elastomers can be based on:
Acrylics, which can have sufficient tack on their own to not require a tackifier. Bio-based acrylate. Recently, a biological-based macromonomer was grafted onto a backbone of acrylate so that the resulting PSA uses 60% bio-based materials.[1]
Butyl rubber
Ethylene-vinyl acetate (EVA) with high vinyl acetate content; can be formulated as a hot-melt PSA.
Natural rubber
Nitriles
Silicone rubbers, requiring special tackifiers based on "MQ" silicate resins, composed of a monofunctional trimethyl silane ("M") reacted with quadrafunctional silicon tetrachloride ("Q").
Styrene block copolymers (SBC), also called styrene copolymer adhesives and rubber-based adhesives, have good low-temperature flexibility, high elongation, and high heat resistance.
Styrene-butadiene-styrene (SBS), used in high-strength PSA applications
Styrene-ethylene/butylene-styrene (SEBS), used in low self-adhering non-woven applications
Styrene-ethylene/propylene (SEP)
Styrene-isoprene-styrene (SIS), used in low-viscosity high-tack PSA applications
Vinyl ethers
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See also:
http://www.enotes.com/topic/Pressure_sensitive_tape
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■Transparent office tape has a transparent film backing and an acrylic or synthetic rubber based adhesive. It is used for sealing envelopes, repairing torn paper products, general holding, etc.
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Last edited by astro; 05-02-2012 at 08:35 PM.
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