High Performance Polyurethane Elastomers. Part 2. Millable Elastomers and Syntactic Foams
Abstract
Polyurethane elastomers based on millable sulphur cured polycaprolactone, polyoxy 1,4- butylene glycol and hydroxyl terminated polybutadiene/di-isocyanate precursors, chain extended with unsaturated diols, together with liquid cast polyoxy 1,4- butylene glycol di-isocyanate prepolymers filled with small hollow spheres (syntactic foams) were assessed to determine their resistance to water 80 C) and Standard Test Fluid (65 C). Two commercially supplied urethane elastomers, one based on a low molecular weight polyether/ toluene di- isocyanate prepolymer cured with methylene- bis-(2-chloroaniline), the other on a higher molecular weight polyether/4,4'-methylene bis-cyclohexyl di-isocyanate prepolymer, cured with methylene bis-aniline were also assessed for comparison. A millable caprolactone urethane elastomer gave fair resistance to standard test fluid at 65 C COUPLED WITH A VERY LOW PERMEABILITY TO STANDARD TEST FLUID AT 30 C, while a millable polyether urethane elastomer gave good resistance to water at 80 C. A low density buoyant polyether based syntactic foam, filled either with hollow glass or 'fly-ash' spheres, gave good resistance to water at 80 C.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1972
- Accession Number
- AD0750563
Entities
People
- B. E. Brokenbrow
- D. Sims
- John Wright