5 Most Important Additives for Waterborne Adhesives
Ideally, plasticizers should be: Highly compatible with polymers, Stable in both high and low temperature environments, Sufficiently lubricate over a wide temperature range, Insensitive to solar ultraviolet radiation, Leaching and migration resistant, Inexpensive, Fulfilling health and safety regulations.
Selecting Tackifiers for Adhesives and Sealants
Tackifiers have been found to be especially useful in improving adhesion to hard-to-bond substrates such as low surface energy plastics and coated paper. They have also been found to promote high temperature adhesive performance in certain adhesive systems. Two examples that illustrate the additional benefits of tackifiers are:
Tarene 90P - Natrochem - Tackifier - Good Stain Resistance
Tarene 90P is a low-cost, dark, non-staining, thermoplastic oleo-resinous product having a pitch base, with viscosity adjustments made with a process oil. The performance properties are comparable to or superior to pine tar. Tarene 90P finds its widest application as plasticizer, tackifier, and processing aid in rubber compounding.
Dibenzoate Plasticizers in Waterborne Acrylic PSAs
Figure 3 illustrates the loop tack data, where the plasticizer addition had a positive effect on tack. Notice that the highest value of tack was at the maximum level of both plasticizer and tackifier (10% and 30%, respectively). Rolling ball tack is illustrated in Figure 4.
Kraton Corporation - Chemicals
A low softening point rosin ester with good stability and mild odor. Its polymer compatibility allows it to be used as a tackifier/plasticizer in many adhesive systems, particularly where better wetting or low temperature tack is required. RE 85: A rosin ester combines excellent adhesive performance with low odour and volatility. RE 95
- What is a tackifier resin?
- Pinerez® tackifier resins are recommended to enhance the adhesive performance in hot-melt and solvent-based adhesive applications. They are stabilized, light-colored resins with excellent viscosity stability, and have excellent compatibility with a range of polymers that are widely used in packaging and pressure-sensitive adhesives.
- What is tackifier & plasticizer?
- Due to the molecular property of the resin the tackifier quicky travels to the substrate on the compound providing the much needed building tack. Plasticizer: These resins contribute as plasticizers during the compound of the rubber compound.
- What are Tackifiers used for?
- In adhesive and sealant formulations, tackifiers are used to generate tack and improve specific adhesion (peel strength). They are incorporated into base polymers which mainly lack tackiness and pressure-sensitive properties but provide cohesion.
- What are Tackifiers & plasticizers in PSAs?
- Source: Extance, A., “Using Tackifiers and Plasticizers in PSAs”, SpecialChem, February 9, 2009. Plasticizers are organic liquids or solids that are incorporated by melt processing or diffusion into a compatible polymer to reduce interaction between molecules and improve molecular mobility.
- Does tackifier increase Tg?
- Therefore, the tackifier addition raises the Tg of the final adhesive. Tackifiers operate opposite to plasticizers which lower the Tg of the adhesive formulation. The tackifying agent must be compatible with the base polymer. With hot-melt adhesives, consideration must also be given to the heat stability of the tackifier in the melt.
- How do I choose a tackifier for a hot-melt adhesive?
- With hot-melt adhesives, consideration must also be given to the heat stability of the tackifier in the melt. Tackifiers with unsaturation could potentially gel while the adhesive is in the melt phase. They should also have a relatively low surface tension so as to readily wet the substrate.
