Accession Number:

ADA010388

Title:

Superhard Transparent Coatings

Descriptive Note:

Final rept.

Corporate Author:

MARKS POLARIZED CORP WHITESTONE NY

Personal Author(s):

• Marks, Alvin M.

Report Date:

1975-04-01

Pagination or Media Count:

74.0

Abstract:

The purpose of this work is to develop and provide a superhard coating Moh hardness 5 which is transparent and which will adhere to various polymeric sheet substrates. This coating is to protect helicopter transparencies from scratching and objectionable visual effects, and to avoid frequent replacement. These coatings comprise submicron hard particles in a polymeric matrix. Submicron particles of various compositions and shapes were incorporated in a compatible solution of a polymeric matrix coated on a substrate and tested to determine their physical and optical properties. The compositions selected comprised a dehydrated polyvinyl silicate chemically bound to silica or aluminum oxide particles. Optimum compositions and particle shapes were determined.

Descriptors:

• *ALUMINUM OXIDES
• *PROTECTIVE COATINGS
• *SILICATES
• COMPOSITE MATERIALS
• CRYSTALS
• HARDNESS
• HELICOPTERS
• MECHANICAL PROPERTIES
• OPTICAL PROPERTIES
• PARTICLE SIZE
• PARTICLES
• POLYMERS
• SYNTHESIS(CHEMISTRY)
• TRANSPARENCE

Subject Categories:

• Coatings, Colorants and Finishes

Distribution Statement:

APPROVED FOR PUBLIC RELEASE