Polyether triol-polymeric MDI

Yoshida H, Morck R, Kringstad KP, Hatakeyama H (1990) Kraft lignin in polyurethanes. II. Effects of the molecular weight of kraft lignin on the properties of polyurethanes from a kraft lignin-polyether triol-polymeric MDI system. J Appl Sci 40 1819-1932... [Pg.214]

Yoshida, H., Morck, R., Kringstad, K. P., and Hatakeyama, H., 1987, Kraft lignin in polyurethanes I. Mechanical properties of polyurethanes from a kraft lignin-polyethers triol-polymeric MDI system. J. Appl. Polym. Sci. 34 1187-1198. [Pg.118]

Figure 3. Tensile strengths (On x) of cured kraft lignin-polyether triol-polymeric MDI polyurethanes, NCO/OH ratio 0.9. Variation with content of softwood kraft lignin fractions characterized by different molecular weights that were isolated from the parent preparation through solvent extraction. (Data from reference 17.).

$Figure 3. Tensile strengths (On x) of cured kraft lignin-polyether triol-polymeric MDI polyurethanes, NCO/OH ratio 0.9. Variation with content of softwood kraft lignin fractions characterized by different molecular weights that were isolated from the parent preparation through solvent extraction. (Data from reference 17.).$

Normally a 70/30 to 50/50 blend of a 4500-6500 EO-capped polyether triol with a polymer polyol is used, together with an 80 20 blend of TDI (80/20 isomer ratio) and polymeric MDI. Recently, higher-solids-content graft polyols, e.g., 30-50% solid polyols, have become available in the market. [Pg.60]

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