Bis-type alicyclic cardo phenol resin for moisture barrier

The patent changes the molecular structure parameters of the additive by introducing a rigid cyclic structure with specific functional groups (carboxyl, hydroxyl, or amino groups). This structural modification allows the additive to reduce moisture permeability while maintaining compatibility with the resin matrix, thereby preserving transparency. The rigid cyclic structure prevents excessive molecular motion that would cause incompatibility and haze formation.

The patent creates a composite system where a low molecular weight substance with specific functional groups is combined with polymer chains. The composite structure utilizes hydrogen bonding or ionic interactions between the additive and polymer chains to achieve uniform dispersion, maintaining transparency while providing moisture barrier properties through the synergistic interaction between the two components.

The patent modifies the physical and chemical parameters of the additive by incorporating a rigid cyclic structure, which fundamentally changes how the additive interacts with polymer chains. Instead of acting as a plasticizer that increases molecular motion, the rigid structure restricts polymer chain movement through hydrogen bonding or ionic interactions, thereby maintaining or even improving heat resistance while reducing moisture permeability.

The patent converts the potential harmful effect of adding low molecular weight substances (which usually cause plasticization and reduce heat resistance) into a beneficial effect. By carefully designing the molecular structure with rigid cyclic groups and specific functional groups, the additive becomes a heat-resistant moisture barrier agent that simultaneously improves moisture protection without compromising thermal stability.

The patent changes the functional parameters of the resin system by incorporating low molecular weight substances with specific molecular structures (rigid cyclic structures with carboxyl, hydroxyl, or amino groups) into the acrylic resin matrix. This modification creates hydrogen bonding networks or ionic interactions that significantly reduce free volume and molecular motion, achieving ultra-low moisture permeability levels below 50 g/m²/day, which is sufficient for outdoor polarizing plate applications.

The patent creates a composite material system combining acrylic resin with specifically designed low molecular weight additives. The composite structure leverages the hydrophobic nature of acrylic resin and the hydrogen bonding capability of the additive to achieve synergistic moisture barrier properties, resulting in films with sufficiently low moisture permeability for demanding outdoor applications.