Name: C5/C9 Copolymer Resin Tackifier C59-100
Brand: Coatingsink
SKU: c5-c9-copolymer-tackifier
Availability: InStock

Question 1

Is C59-100 compatible with both SIS- and SBR-based PSA formulations?

Accepted Answer

Yes. The mixed aliphatic-aromatic backbone of C5/C9 copolymer resins provides broad compatibility with SIS (styrene-isoprene-styrene), SBR (styrene-butadiene rubber), and EVA-based hot-melt adhesives. In SIS-based PSAs, C59-100 enhances midblock tack contribution while preserving cohesive strength derived from the polystyrene end-blocks.

Question 2

How does a 100°C softening point influence PSA label performance at elevated service temperatures?

Accepted Answer

A softening point of ~100°C ensures the tackifier remains dimensionally stable at typical label service temperatures up to 60–70°C, resisting cold flow and maintaining shear resistance. For applications requiring label integrity above 80°C, blending C59-100 with a higher-softening-point resin (110–120°C) at 30–50% substitution is recommended.

Question 3

What loading level of C59-100 is recommended in solventborne contact adhesives?

Accepted Answer

In solventborne contact adhesives based on SBR or polychloroprene, C59-100 is typically used at 30–60 phr relative to the rubber polymer. Higher loadings (50–60 phr) maximize initial tack; lower loadings (30–40 phr) favor heat resistance and cohesive strength for structural bonding where creep resistance is critical.

Acid Value	<1 mg KOH/g
Bromine Number	<5 g Br/100g
Color (Gardner)	≤3
Density (25°C)	0.97–1.00 g/cm³
Softening Point (Ring & Ball)	98–102°C

C5/C9 Copolymer Resin Tackifier C59-100

Specifications

FAQ

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