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:
Nov. 15, 1977
Filed:
Aug. 01, 1975
Jean Claude Bonnet, Blois (Loir & Cher), FR;
Other;
Abstract
A process for preparing liquid treating agents, stable under storage, especially for improving the wrinkle-free characteristics of cellulosic textiles treated with the liquid in which urea is condensed with formaldehyde in an aqueous solution in the presence of glyoxylic acid. This condensation is carried out in a first step using an acid pH between 2 and 5 with a molar ratio of urea/formaldehyde/glyoxylic acid of 1 : 2 to 10 : 0.03 to 0.6 and at a temperature between 20.degree. and 100.degree. C. In a second stage the reaction is carried out at a slightly acidic pH between 6 and 7 at a temperature between 20.degree. and 60.degree. C with addition of a fresh quantity of urea and eventually a fresh quantity of formaldehyde in an aqueous solution so as to obtain an overall molar ratio of urea/formaldehyde/glyoxylic acid of 1 : 1.5 to 3.5 : 0.03 to 0.6.