Molecular weight: 405.1
Appearance: light yellow transparent liquid
Viscosity: ≤ 380mPas (25 ℃ )
Refractive index: 1.492 (20 ℃)
Density: 1.250g/cc (20 ℃ )
Tin content: ≥ 28.0wt%
Stannous content: Stannous octanoate catalyst is an important catalyst in the production of polyurethane foam, especially polyurethane flexible foam.
The application of special HAS E in paints to be color-matched and base paints. According to Olesen et al.  of Dow Company, when color-matching paint, when the amount of color paste is about 4% to 8%, the amount of paint after adding color paste is about 4%~8%. Stormer’s viscosity decreased by about 30-40KU, which caused problems such as inconsistent viscosity, sagging, and decreased storage stability of paints of the same variety and different colors. However, the specially developed HAS E thickeners UCAR POLYPHONE T-900 and T-901 are not sensitive to the addition of colorants, so they are suitable for the thickening of color-matched paints and base paints.
For vinegar-acrylic latex paint, UCAR POLYPHONE T-900 can be used alone, or UCAR POLYPHONE T-900PHONE T-901 can be used. Mainly, add a small amount of UCAR POLY-
For fine particle size pure acrylic and styrene-acrylic latex paints, UCAR POLYPHONET-901 should be the main product, with a small amount of UCAR POLYPHONE T-900.
Polyurethane thickener and hydrophobically modified non-polyurethane thickener
Polyurethane thickener is abbreviated as HEUR, which is a hydrophobic group-modified ethoxylated polyurethane water-soluble polymer. It is a non-ionic associative thickener with a relative molecular mass of about 3X 10*~5X 104. The structure of several HEURs is shown in Figure 19-5.
HEUR is composed of three parts: hydrophobic group, hydrophilic chain and polyurethane group. The hydrophobic group acts as an association and is the decisive factor for thickening, usually oleyl, octadecyl, dodecyl phenyl, nonyl, etc. Hydrophilic chains can provide chemical stability and viscosity stability, and polyethers are commonly used, such as polyoxyethylene and its derivatives. The molecular chain of HEUR is extended by polyurethane groups. The polyurethane groups used are IP DI, TDI and HMD I, etc. The structural ethylene acrylic acid copolymer dispersion feature of associative thickeners is that they are terminated by hydrophobic groups. However, the degree of substitution of hydrophobic groups at both ends of some commercially available HEURs is lower than 0.9, and the best is only 1.7t2l.
The reaction conditions should be strictly controlled to obtain the polyurethane thickener with the narrowest molecular distribution and stable performance. Most HEURs are synthesized by stepwise polymerization, so commercially available HEURs are generally mixtures with a wide range of molecular weights.
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