scholarly journals Influence of Acrylic Acid and Tert-Dodecyl Mercaptan in the Adhesive Performance of Water-Based Acrylic Pressure-Sensitive Adhesives

Polymers ◽  
2020 ◽  
Vol 12 (12) ◽  
pp. 2879
Author(s):  
Irene Márquez ◽  
Núria Paredes ◽  
Felipe Alarcia ◽  
José Ignacio Velasco
Keyword(s):  
Acrylic Acid ◽  
Chain Transfer ◽  
Shear Resistance ◽  
Chain Transfer Agent ◽  
Adhesive Properties ◽  
Gel Content ◽  
Pressure Sensitive Adhesives ◽  
Pressure Sensitive ◽  
Water Based ◽  
Dodecyl Mercaptan

Currently, pressure-sensitive adhesives (PSA) are used in more than 80% of all labels in the market today. They do not require any heat, solvent, or water to activate: It only takes light pressure to apply them to a product surface. Many products that come in glass bottles need labels that have staying power in harsh conditions. For that reason, it is necessary to have a good balance between all the polymer adhesive properties. In this study is described how adhesive properties of water-based PSA were affected by varying the amount of functional monomer acrylic acid (AA) and chain transfer agent, tert-dodecyl mercaptan (TDM). Four series of PSA were prepared by emulsion polymerization. Within each polymer series, the AA monomer proportion was held constant between 0.5 and 3.0 phm, and the fraction of the chain transfer agent was varied 0.0 to 0.2 phm. The results showed that the gel content decreased with the increase of the chain transfer agent and with the reduction of AA. All adhesives properties (tack, peel, and shear resistance) improved with increasement of the AA monomer. The increase of chain transfer agent caused decrease of the gel content resulting in higher peel resistance and tack values, but lower shear resistance values.

Rheology and adhesive properties of filled PIB-based pressure-sensitive adhesives. I. Rheology and shear resistance

2014 ◽  
Vol 29 (17) ◽  
pp. 1831-1848 ◽  
Author(s):  
Anna Kostyuk ◽  
Viktoria Ignatenko ◽  
Nina Smirnova ◽  
Tatiana Brantseva ◽  
Sergey Ilyin ◽  
...  
Keyword(s):  
Shear Resistance ◽  
Adhesive Properties ◽  
Pressure Sensitive Adhesives ◽  
Pressure Sensitive

scholarly journals Influence of Acrylic Acid on Kinetics of UV-Induced Cotelomerization Process and Properties of Obtained Pressure-Sensitive Adhesives

Materials ◽  
2020 ◽  
Vol 13 (24) ◽  
pp. 5661
Author(s):  
Agnieszka Kowalczyk ◽  
Mateusz Weisbrodt ◽  
Beata Schmidt ◽  
Konrad Gziut
Keyword(s):  
Acrylic Acid ◽  
Crosslinking Agent ◽  
Solid Content ◽  
Scanning Calorimetry ◽  
Adhesive Properties ◽  
Pressure Sensitive Adhesives ◽  
Molecular Weights ◽  
Pressure Sensitive ◽  
Physicochemical Features ◽  
Kinetics Of

A new environmentally friendly method of photoreactive pressure-sensitive adhesives (PSAs) preparation was demonstrated. PSAs based on n-butyl acrylate (BA), acrylic acid (AA) and 4-acryloyloxy benxophenone (ABP) were prepared via the UV-induced cotelomerization process in the presence of a radical photoinitiator (acylphosphine oxide) and telogen (tetrabromomethane). Hydroxyterminated polybutadiene was used as a crosslinking agent. Influence of AA concentration (0–10 wt %) on kinetics of the cotelomerization process was investigated using a photodifferential scanning calorimetry method, selected physicochemical features of obtained photoreactive BA/AA/ABP cotelomers (molecular masses, polydispersity, monomers conversion and dynamic viscosity) and self-adhesive properties of obtained PSAs (adhesion, tack and cohesion) were studied, as well. It turned out that AA content is the important factor that influences monomers conversion (thereby the volatile parts content in prepolymer) and PSAs’ properties. As the acrylic acid content increases, the reaction rate increases, but the total monomers conversion and the solid content of the prepolymer decreases. Additionally, the adhesion and cohesion of PSAs were grown up, and their tackiness decreased. However, the AA content has no effect on molecular weights (Mw and Mn) and polydispersity (c.a. 1.5) of photoreactive cotelomers. The optimal AA content necessary to obtain a prepolymer with low volatile parts content and good PSA properties was determined.

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