Weather-resistant polyamides and method of their production

Details Weather-resistant polyamides and method of their production Weather-resistant polyamides and method of their production

1997-07-09

1999-06-29

Hampton-Hightower, P.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From carboxylic acid or derivative thereof

528310, 528322, 528327, 528331, 528335, 528336, 528341, 528349, 524100, 524154, C08G 6908, C08G 7300

Patent

active

059170042

ABSTRACT:
The invention is relative to weather-resistant polyamides and to methods of their production in which the polymerization or polycondensation of the polyamide-forming monomers (I) is carried out in the presence of 0.02 to 0.7% by weight 4-amino-2,2,6,6-tetraalkylpiperdine (II), 0 to 0.5% by weight of an aliphatic or cycloaliphatic diamine (III) carrying a primary and a tertiary amino group and 0.02 to 0.7% by weight of a 2,6-dialkylphenol (IV) functionalized in 4-position to the OH group and with the formula ##STR1## in which R.sup.1 and R.sup.2 are the same or different alkyl groups with 1 to 6 C atoms, R.sup.3 is either a hydrogen atom or a methyl group, functional group A represents either a free carboxyl group or a carboxyl group esterified with C.sub.1 -C.sub.4 alcohols or represents a primary amino group, in the case of the amino group the value combinations (x=2/y=1); (x=2/y=0); (x=1/y=0) and (x=0/y=1) are possible for x and y and in the case of the free or esterified carboxyl group x and y can additionally each be 0,

REFERENCES:
patent: 4333868 (1982-06-01), Schmidt et al.

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