Dipiperidyl propane is a chemical compound used in laboratory equipment. It serves as a key component in various analytical and research applications.
Example 9
A polyurea copolymer was synthesized by combining 0.0764 grams 1,3-diamino-2-hydroxy-propane (0.8 mmole, Sigma Aldrich, Milwaukee, Wis.) and 0.2186 grams dipiperidyl propane (1.0 mmole, Sigma Aldrich, Milwaukee, Wis.) in 15 ml of isopropanol. To this, 0.415 ml of hexane diisocyanate (2.6 mmoles, Sigma Aldrich, Milwaukee, Wis.) was added. The reaction mixture precipitated vigorously, the resulting white copolymer was insoluble in isopropanol.
Example 6
A silicone urea triblock copolymer was synthesized by combining 0.93 ml of Jeffamine ED600 (1.6 mmole, Sigma Aldrich, Milwaukee, Wisc.) and 0.0842 grams dipiperidyl propane (0.4 mmole, Sigma Aldrich, Milwaukee, Wisc.) in 15 ml of isopropanol. To this, 0.33 grams monofunctional silicone isocyanate (MW˜15,000, 0.02 mmoles, Silar, Wilmington, N.C.) was added with stirring for 15 minutes at room temperature, followed by the addition of 0.415 ml of hexane diisocyanate (2.6 mmoles, Sigma Aldrich, Milwaukee, Wisc.). The reaction mixture was stirred vigorously at room temperature for 1 hour, then used without further purification. The resulting product was soluble in isopropanol.
Example 20
A polyurea copolymer containing benzophenone photoreactive end group is synthesized as follows. 8 mg of 4-aminobenzophenone (40 umol, Sigma Aldrich, St. Louis, Mo.) is dissolved in 15 ml of isopropanol, to which 185 mg of dipiperidyl propane (0.88 mmole, Sigma Aldrich, St. Louis, Mo.) and 52.8 mg of Jeffamine™ ED600 (0.88 mmol Sigma Aldrich, St. Louis, Mo.) is added. After all the amines dissolve, 0.42 ml of isophorone diisocyanate (2 mmol, Sigma Aldrich, St. Louis, Mo.) is added via syringe and the reaction mixture stirs at room temperature for 2 hours. The benzophenone-terminated polyurea can be used without further purification.
Example 1
A silicone urea triblock copolymer was synthesized by combining 2.117 grams of Jeffamine ED1900 (1 mmole, Sigma Aldrich, Milwaukee, Wisc.) and 0.20137 grams dipiperidyl propane (1 mmole, Sigma Aldrich, Milwaukee, Wisc.) in 15 ml of isopropanol. To this, 0.300 grams monofunctional silicone isocyanate (MW˜15,000, 0.02 mmoles, Sitar, Wilmington, N.C.) was added with stirring for 15 minutes at room temperature, followed by the addition of 0.415 ml of hexane diisocyanate (2.6 mmoles, Sigma Aldrich, Milwaukee, Wisc.). The reaction mixture was stirred vigorously at room temperature for 1 hour, then used without further purification.
Example 8
A silicone urea triblock copolymer was synthesized by combining 0.13 ml of m-xylylene diamine (1.0 mmole, Sigma Aldrich, Milwaukee, Wisc.) and 0.2145 grams dipiperidyl propane (1.0 mmole, Sigma Aldrich, Milwaukee, Wisc.) in 15 ml of isopropanol. To this, 0.34 grams monofunctional silicone isocyanate (MW˜15,000, 0.02 mmoles, Silar, Wilmington, N.C.) was added with stirring for 15 minutes at room temperature, followed by the addition of 0.415 ml of hexane diisocyanate (2.6 mmoles, Sigma Aldrich, Milwaukee, Wisc.). The reaction mixture was stirred vigorously at room temperature for 1 hour, then used without further purification. The resulting product immediately precipitated and was insoluble in isopropanol.
Example 13
A silicone urea triblock copolymer was synthesized by combining 0.0060 grams of L-lysine (0.04 mmole, Sigma Aldrich, Milwaukee, Wisc.) and 1.9189 grams of Jeffamine ED1900 (0.96 mmole, Sigma Aldrich, Milwaukee, Wisc.) and 0.2204 grams of dipiperidyl propane (1.0 mmole, Sigma Aldrich, Milwaukee, Wisc.) in 7.5 ml of isopropanol with 7.5 ml of deionized water. To this, 0.0371 grams monofunctional silicone isocyanate (MW˜15,000, 0.002 mmoles, Silar, Wilmington, N.C.) was added with stirring for 15 minutes at room temperature, followed by the addition of 0.415 ml of hexane diisocyanate (2.6 mmoles, Sigma Aldrich, Milwaukee, Wisc.). The reaction mixture was stirred vigorously at room temperature for 1 hour, then used without further purification. The resulting product immediately precipitated and was insoluble in isopropanol/water.
Example 5
A polyurea copolymer was synthesized by combining 0.1313 grams of Jeffamine™ ED600 (0.2 mmole, Sigma Aldrich, Milwaukee, Wis.) and 0.3826 grams dipiperidyl propane (1.8 mmole, Sigma Aldrich, Milwaukee, Wis.) in 15 ml of isopropanol. To this, 0.415 ml of hexane diisocyanate (2.6 mmoles, Sigma Aldrich, Milwaukee, Wis.) was added. The reaction mixture precipitated vigorously, the resulting white copolymer was insoluble in isopropanol.
Example 3
A silicone urea triblock copolymer was synthesized by combining 0.41 ml of Jeffamine ED600 (0.7 mmole, Sigma Aldrich, Milwaukee, Wisc.) and 0.273 grams dipiperidyl propane (1.3 mmole, Sigma Aldrich, Milwaukee, Wisc.) in 15 ml of isopropanol. To this, 1.500 grams monofunctional silicone isocyanate (MW˜15,000, 0.1 mmoles, Silar, Wilmington, N.C.) was added with stirring for 15 minutes at room temperature, followed by the addition of 0.415 ml of hexane diisocyanate (2.6 mmoles, Sigma Aldrich, Milwaukee, Wisc.). The reaction mixture was stirred vigorously at room temperature for 1 hour, then used without further purification.
Example 16
A silicone urea triblock copolymer was synthesized by combining 0.3612 grams dipiperidyl propane (1.7 mmole, Sigma Aldrich, Milwaukee, Wisc.) and 0.1891 grams of Jeffamine ED600 (0.3 mmole, Sigma Aldrich, Milwaukee, Wisc.) in 15 ml isopropanol. To this, 0.3126 grams monofunctional silicone isocyanate (MW˜15,000, 0.02 mmoles, Silar, Wilmington, N.C.) was added with stiffing for 15 minutes at room temperature, followed by the addition of 0.415 ml of hexane diisocyanate (2.6 mmoles, Sigma Aldrich, Milwaukee, Wisc.). The reaction mixture was stirred vigorously at room temperature for 1 hour. The resulting product was insoluble in isopropanol and in water:isopropanol mixtures.
Example 18
A polyurea copolymer containing benzophenone photoreactive group was synthesized as follows. 88.6 mg of 4,4′-diaminobenzophenone (0.45 mmole, Sigma Aldrich, St. Louis, Mo.) was dissolved in 30 ml of methanol with 88.3 mg of dipiperidyl propane (0.42 mmole, Sigma Aldrich, St. Louis, Mo.) and 2406 mg of Jeffamine™ ED 1900 (1.3 mmole, Sigma Aldrich, St. Louis, Mo.) at 60° C. overnight. The solution was then cooled to room temperature, and 445 mg of isophorone diisocyanate (2.0 mmole Sigma Aldrich, St. Louis, Mo.) was added. The reaction mixture was stirred for 4 hours and was used without purification. The reaction mixture was diluted into deionized water to form a 10 mg/ml solution.
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