Chlorinated thermoplastics stabilized with aminouracils

US4656209A · kind A · utility

Assignee

• Ciba-Geigy · US

Inventors

• Wolfgang Wehner · Ober-Ramstadt, DE
• Hermann O. Wirth · Bensheim, DE

Key dates

• Filing date: May 17, 1982
• Grant date: Apr 7, 1987
• Expiry date: May 17, 2002

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08K5/3462
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention relates to thermoplastic molding compositions based on vinyl chloride polymers and containing, as stabilizer, 0.1 to 5% by weight of an aminouracil of the formula I ##STR1## wherein R.sup.1 is hydrogen, C.sub.1 -C.sub.8 alkyl, C.sub.5 -C.sub.8 cycloalkyl, phenyl, benzyl, C.sub.1 -C.sub.4 hydroxyalkyl, hydroxyphenyl, C.sub.2 -C.sub.8 alkoxyalkyl, C.sub.2 -C.sub.8 alkylthioalkyl, C.sub.6 -C.sub.10 cycloalkoxyalkyl, C.sub.6 -C.sub.10 cycloalkylthioalkyl, C.sub.8 -C.sub.14 aralkoxyalkyl, C.sub.8 -C.sub.14 aralkylthioalkyl, C.sub.7 -C.sub.14 aryloxyalkyl, C.sub.7 -C.sub.14 arylthioalkyl, --NHR.sup.4, in which R.sup.4 is hydrogen, phenyl or chlorine-substituted phenyl, and R.sup.2 and R.sup.3, each independently of the other, are C.sub.2 -C.sub.21 alkyl, C.sub.6 -C.sub.12 aryl or C.sub.7 -C.sub.19 aralkyl, while one of R.sup.2 and R.sup.3 may also be hydrogen. The addition of such aminouracils gives vinyl chloride polymers which are very well protected against heat-induced degradation. The aminouracils cause no haze in the polymer to be protected.