Fiber coatings with low modulus and high critical stress

[0227] Several exemplary coatings prepared from coating compositions comprising oligomeric materials according to the present disclosure were prepared and tested. Testing included measurements of Young's modulus, tear strength and critical stress. The preparation of the oligomer materials, description of the components of the coating compositions, processing conditions used to form the oligomer materials and coatings, test methods, and test results are described below.

[0228] oligomer material. The coating composition is a curable coating composition comprising an oligomeric material of the type described herein. For illustrative purposes, the reaction scheme from H12MDI (4,4'-methylene bis(cyclohexyl isocyanate)), PPG4000 (polypropylene glycol, M n 4000 g / mole) and HEA (2-hydroxyethyl acrylate) to prepare exemplary oligomer materials. All reagents used were provided by the manufacturer without further purification. H12MDI was purchased from ALDRICH Company. PPG4000 is ...