Detail of "28961-43-5"

Reference

Radiation hardenable thinning agent for radiation hardenable compositions

Radiation hardenable thinning agent for radiation hardenable compositions. Schuster, Karl Ernst; Rosenkranz, H. J.; Fuhr, Karl; Rudolph, Hans (Bayer A.-G., Ger.). Ger. Offen. DE 2651507 24 May 1978, 19 pp. (German). (Germany). CODEN: GWXXBX. CLASS: IC: C08J003-28. APPLICATION: DE 76-2651507 11 Nov 1976. DOCUMENT TYPE: Patent CA Section: 42 (Coatings, Inks, and Related Products) Polyfunctional acrylic acid esters of oxyethylated trimethylolpropane are used as radiation-curable thinners for radiation-curable binders. The esters are a mixt. of triacrylates of trimethylolpropane-ethylene oxide reaction products with av. degree of oxyethylation 2.5-4 and distribution mono- 4-5, di- 14-16, tri- 20-30, tetra- 20-30, penta- 16-18, and hexaoxyethylation 6-8%. Thus, 402 g trimethylolpropane contg. 1 g MeONa was treated with 495 g ethylene oxide at 100° to give a colorless product with OH no. 555, Hoeppler viscosity 500 cP at 20°, and product distribution mono- 4, di- 14, tri- 29, tetra- 30, penta- 16, and hexaoxyethylation 6%. Then 300 g product (degree of oxyethylation 3.75) in 50 mL toluene was treated with 216 g acrylic acid in the presence of 2.5 g p-toluenesulfonic acid to give an oxyethylated trimethylolpropane triacrylate (I) [28961-43-5] with OH no. 13 and Hoeppler viscosity 102 cP. A UV-curable mixt. of I, acrylic acid-bisphenol A diglycidyl ether copolymer [52985-33-8], and a-cyanoethylbenzoin Et ether had a lower viscosity and better reactivity on exposure to UV irradn. than similar compns. contg. conventional thinners.

Dynamic surface tension measurement in radcure systems

Dynamic surface tension measurement in radcure systems. McDermott, Michael (Coatings and Inks Division, Henkel Corporation, USA). PPCJ, Polymers Paint Colour Journal, 186(4383), S5-S6 (English) 1996 FMJ International Publications. CODEN: PPCJF8. ISSN: 1357-731X. DOCUMENT TYPE: Journal CA Section: 42 (Coatings, Inks, and Related Products) Among the oligomers studied, polyesters consistently provided the lowest dynamic surface tension followed by polyurethanes and finally epoxy resins. Considering alkoxylation types, the general trend indicated that propoxylation provided the lowest dynamic surface tension for a given monomer type, followed by ethoxylation and those without alkoxylation.In this article, certain chemicals are used. Some of their cas registry numbers are 106158-22-9 and 28961-43-5 The roles of ethoxylation and propoxylation reversed themselves at high epoxy concns., but the propoxylated monomer were less susceptible to increase in the rate of surface generation so that at generation times of 200 ms, the effectiveness of both monomers was approx. equiv. The Me ether of ethoxylated trimethylolpropane diacrylate was esp. effective in reducing the dynamic surface tension of a system, providing a redn. of 3-10 dyne/cm over its parent monomer. .