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PREC Investigates Acrylic Resin Solubility in Different Solvents

Experimental Design

Rotational viscosity at 25°C was used to compare the dissolving power of five solvents for acrylic resin under varying solid contents and temperatures.

  • Temperature range: 15-65°C in 10°C increments
  • Solid content: 10-70% in 10% increments
  • Constant dissolution time (2h) and mass (104g)

For clarity, the solvents referenced in this study are abbreviated as follows:

  • EEP: 3-Ethoxyethyl Propionate
  • MMP: 3-Methoxypropyl Propionate
  • MAK: 2-Heptanone (Methyl Amyl Ketone)
  • BA: Butyl Acetate
  • PMA: Propylene Glycol Methyl Ether Acetate

Data Analysis

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At 10% solid content:

  • BA showed inferior performance
  • Below 35°C: Complete dissolution only in MMP/EEP
  • 35-65°C: Similar performance for PMA/MAK/MMP/EEP
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At 20% solid content:

  • BA remained weakest
  • MMP showed slightly higher viscosity at 55°C
  • Other solvents exhibited nearly identical performance
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At 30% solid content:

  • Above 45°C: MAK showed strongest dissolving capability
  • Below 60°C: MMP > EEP > PMA
  • At 65°C: EEP≈MMP (slightly below PMA)
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At 40% solid content:

  • Dissolution capability ranking: MAK > EEP > MMP > PMA > BA
  • Full dissolution achieved above 45°C (MAK/EEP/MMP) and 55°C (PMA/BA)

At solid contents of 50% and above, acrylic resin could not be fully dissolved in any of the five solvents.

Experimental Conclusions

Five solvents were tested for their ability to dissolve acrylic resin. Key results showed:

  • At >10% resin solid content, MAK demonstrated strongest dissolving power while BA was weakest
  • For 10-20% solid content: MMP, EEP and PMA showed similar dissolving capabilities
  • At 30-50% solid content: EEP and MMP outperformed PMA

Technical Insight

The solvent’s ability to dissolve the resin can be intuitively expressed by the viscosity of the system.

  • Lower solubility → stronger molecular aggregation → higher viscosity
  • Higher solubility → lower viscosity

For more information about functional solvents, please visit: PREC EEP Solvent and PREC MMP Solvent.

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