TREA

Tetrakis(3-(3,5-di-tert.buyl-4-hydroxyphenyl)propionyl-oxymethyl) methane with amorphous structure, process for its preparation and its use as a stabilizer

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Information

  • Patent Grant
  • 4886900
  • Patent Number
    4,886,900
  • Date Filed
    Friday, July 17, 1987
    37 years ago
  • Date Issued
    Tuesday, December 12, 1989
    35 years ago
Information
Abstract
Tetrakis[3,5-di-tert.butyl-4-hydroxyphenyl)-propionyl-oxymethyl]methane with amorphous structure, with glass transition temperature T.sub.g comprised within the range of from about 40.degree. C. to 50.degree. C. and free from endothermic melting peaks at temperatures higher than 50.degree. C. and of up to 200.degree. C. is obtained by means of the melting of crystalline tetrakis[3-(3,5-di-tert.butyl-4-hydroxyphenul)-propionyl-oxymethyl]methane and sudden cooling of the molten material.
Description
Claims
  • 1. The compound:
  • Tetrakis(3-(3,5-di-tert.butyl-4-hydroxyphenyl)-propionyl-oxymethyl)methane having an amorphour structure, a glass transition temperature of from about 40.degree. C. to 50.degree. C. and no endothermic melting peaks at temperatures from 50.degree. C. to 200.degree. C., said amorphous tetrakis(3-(3,5-di-tert.butyl-4-hydroxyphenyl)-propionyl-oxymethyl)methane maintaining unchanged said characteristics during at least four heating and cooling cycles between -100.degree. C. and +100.degree. C.
  • 2. The compound according to claim 1 wherein said tetrakis(3-(3,5-di-tert.butyl-4-hydroxyphenyl)-propionyl-oxymethyl)methane exhibits a X-ray spectrum as follows:
  • ______________________________________MAIN PEAKS2T D I (CPS) I/I.sub.o______________________________________13.40 6.607 975 5715.51 5.712 987 5815.86 5.587 1014 6016.01 5.535 1032 6116.40 5.405 1112 6516.57 5.349 1140 6716.81 5.275 1200 7116.95 5.229 1266 7517.05 5.199 1294 7617.41 5.094 1363 8017.69 5.013 1491 8818.16 4.886 1607 9518.51 4.794 1677 9918.60 4.769 1685 10018.79 4.721 1661 9818.98 4.675 1638 9719.27 4.605 1577 9319.68 4.510 1373 8119.98 4.443 1279 7520.53 4.325 1020 60______________________________________
  • and an IR spectrum, as reported in FIG. 4.
  • 3. Process for amorphous tetrakis(3-(3,5-di-tert.butyl-4-hydroxyphenyl)-propionyl-oxymethyl)-methane having a glass transition temperature from about 40.degree. C. to 50.degree. C. and no endothermic melting peaks at temperatures from about 50.degree. C. to 200.degree. C., said amorphous tetrakis(3-(3,5-di-tert.butyl-4-hydroxyphenyl)-propionyl-oxymethyl)-methane maintaining unchanged said characteristics during at least four heating and cooling cycles between -100.degree. C. and +100.degree. C. and exhibiting a X-ray spectrum as follows:
  • ______________________________________MAIN PEAKS2T D I (CPS) I/I.sub.o______________________________________13.40 6.607 975 5715.51 5.712 987 5815.86 5.587 1014 6016.01 5.535 1032 6116.40 5.405 1112 6516.57 5.349 1140 6716.81 5.275 1200 7116.95 5.229 1266 7517.05 5.199 1294 7617.41 5.094 1363 8017.69 5.013 1491 8818.16 4.886 1607 9518.51 4.794 1677 9918.60 4.769 1685 10018.79 4.721 1661 9818.98 4.675 1638 9719.27 4.605 1577 9319.68 4.510 1373 8119.98 4.443 1279 7520.53 4.325 1020 60______________________________________
  • and an IR spectrum, as reported in FIG. 4, said process comprising:
  • melting crystalline tetrakis(3-(3,5-di-tert.butyl-4-hydroxyphenyl)-propionyl-oxymethyl)methane into a molten material; and
  • solidifying said molten material by sudden cooling.
  • solidifying said molten material by sudden cooling.
  • 4. The process according to claim 3, wherein said sudden cooling is accomplished by pouring said molten material on a cold metal sheet.
  • 5. The process according to claim 3, wherein said sudden cooling is accomplished by pouring said molten material into water.
  • 6. The process according to claim 3, wherein said sudden cooling is accomplished by contacting said molten material as drops with agas.
  • 7. Stabilized polymeric compositions comprising an organic polymer and a stabilizing amount of an amorphous tetrakis-3-(3,5-di-tert.butyl-4-hydroxyphenyl)-propionyl-oxymethyl)-methane having a glass transition temperature from about 40.degree. C. to 50.degree. C. and no endothermic melting peaks at temperatures from about 50.degree. C. to 200.degree. C., said amorphous tetrakis(3-(3,5-di-tert.butyl-4-hydroxyphenyl)-propionyl-oxymethyl)-methane maintaining unchanged said characteristics during at least four heating and cooling cycles between -100.degree. C. and +100.degree. C. and exhibiting a X-ray spectrum as follows:
  • ______________________________________MAIN PEAKS2T D I (CPS) I/I.sub.o______________________________________13.40 6.607 975 5715.51 5.712 987 5815.86 5.587 1014 6016.01 5.535 1032 6116.40 5.405 1112 6516.57 5.349 1140 6716.81 5.275 1200 7116.95 5.229 1266 7517.05 5.199 1294 7617.41 5.094 1363 8017.69 5.013 1491 8818.16 4.886 1607 9518.51 4.794 1677 9918.60 4.769 1685 10018.79 4.721 1661 9818.98 4.675 1638 9719.27 4.605 1577 9319.68 4.510 1373 8119.98 4.443 1279 7520.53 4.325 1020 60______________________________________
  • and an IR spectrum, as reported in FIG. 4.
Priority Claims (1)
Number Date Country Kind
21258 A/86 Jul 1986 ITX
Parent Case Info

The present invention relates to tetrakis[3-(3,5-di-tert.butyl-4-hydroxyphenyl)-propionyl-oxymethyl]methane with amorphous structure, to the process for preparing it and to its use as a stabilizer, in particular for organic polymers. Tetrakis[3-(3,5-di-tert.butyl-4-hydroxyphenyl)-propionyl-oxymethyl]methane is a compound having the formula: ##STR1## useful as a stabilizer for the organic materials, in particular the organic polymers, which undergo oxidative degradation due to the action of light and/or of heat, such as, e.g., disclosed in U.S. Pat. No. 3,644,428. Furthermore, the commercial products of tetrakis[3-(3,5-di-tert.butyl-4-hydroxyphenyl)-propionyl-oxymethyl]-methane are known, such as, e.g., those marketed by Ciba-Geigy under the trade name Irganox.RTM. 1010 and those sold by the Italian company Bozzetto under the trade name Anox.RTM. 20.

US Referenced Citations (1)
Number Name Date Kind
4683326 Orban et al. Jul 1987