The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 12, 1999
Filed:
Mar. 19, 1998
Cornelis E Koning, Schinnen, NL;
Petronella M Knape, Sittard, NL;
Robert M Leeuwendal, Maastricht, NL;
Josefina M Schiffer, Vaals, NL;
DSM N.V., Heerlen, NL;
Abstract
The invention relates to electrical and electronic components made of a polyamide composition and possessing an improved resistance under soldering conditions, particularly when the surface mounting technique is used. This is achieved by using a polyamide composition whose main chain essentially consists of units derived from aliphatic dicarboxylic acids and diamines or .alpha.,.omega.-amino acids, and in which 1-40% of the chain units are derived from 1,6-cyclohexanedicarboxylic acid and an aliphatic diamine, or from 1,4-cyclohexanediamine and an aliphatic dicarboxylic acid. As a result, the temperature at which blisters are formed during soldering by the infrared method is 20-30.degree. C. higher than in the case of the homo-polyamide.