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US 2014/0005313 A1Published application
Acrylic acid polymer nanocomposites from aminosilane-modified colloidal silica
AssigneeE. I. Du Pont de Nemours and Company
InventorsPaul Gregory Bekiarian, Gregory Scott Blackman, Gordon Mark Cohen
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Abstract
This invention relates to compositions comprising blends of acrylic add polymers and/or ethylene acrylic add copolymers and colloidal silica modified with certain aromatic aminosilanes, aromatic aminoalkylsilanes, alkenyl aminoalkylsilanes, secondary or tertiary aliphatic aminosilanes. These compositions can provide improved properties such loss modulus, storage modulus, creep resistance, and wear resistance, without sacrificing optical clarity.
Claims11
A nanocomposite comprising:
- a) an acrylic polymer comprising monomers selected from the group consisting of methacrylic acid and acrylic add;
- and
- b) an aminosilane-modified colloidal silica, wherein the aminosilane-modified colloidal silica is prepared by contacting colloidal silica with an aminosilane of Formula 1:
- wherein
- R1 and R2 are independently selected from the group consisting of H, C1-C10 alkyl, C3-C10 alkenyl, and C6-C10 aryl;
- A is a linker group selected from the group consisting of C1-C20 alkylene, arylene, and arylalkylene;
- and
- R3 is a C1-C10 alkoxy group;
- and
- R4 and R5 are independently selected from the group consisting of C1-C10 alkyl and C1-C10 alkoxy groups,
- provided that if R1 and R2 are H, A is phenylene.
8 more elements
Dependencies are inferred from the claim text.