SP-1056 is a heat-reactive phenolic resin based on brominated octyl phenol-formaldehyde. It is similar to SP-1055 but with higher bromine content.
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SP-1056 is a brominated phenolic resin that is heat reactive and contains methylol groups for cross-linking and curing. It offers a faster cure of butyl rubbers and other unsaturated elastomers without the need for halogen donors. SP-1056 prevents quick deterioration by curing or cross-linking.
SP-1056 can also be used for cross-link elastomers in manufacturing pressure-sensitive adhesives. It provides improved cohesive strength while imparting little color to the finished adhesive, allowing high-clarity film formation.
Form: Solid flakes
Specific gravity: 1.05
Softening point (ball and ring): 85°C–95°C
Methylol content: 9.0%–11.0%
Bromine content: 6.0%–7.5%
Primary Chemistry: Brominated octylphenol formaldehyde resin
Scorch safety issues with phenolic resins Poor cohesive strength or color changes while curing rubber adhesives
Butyl rubbers and unsaturated elastomers Rubber and elastomeric pressure-sensitive adhesives
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