Stabilized formaldehyde polymers containing polyvinyl pyrrolidone and thiobisphenols
Abstract
Abstract A POLYMERIC COMPOSITION, CONSISTING ESSENTIALLY OF (A) A MEMBER SELECTED FROM THE GROUP CONSISTING OF A FORMALDEHYDE POLYMER AND A FORMALDEHYDE COPOLYMER, WHICH CONTAINS (CH2O)N UNITS IN THE MACROMOLECULE THEREOF; (B) AT LEAST ONE THIOBISPHENOL COMPOUND SELECTED FROM THE GROUP CONSISTING OF THIOBISPHENOLS OF THE FORMULA: R1,R2,R3,(HO-),((R4,R5,R6,(HO-)PHENYL)-S-)BENZENE WHEREIN R1, R2, R3, R4, R5, AND R6 ARE SELECTED FROM THE GROUP CONSISTING OF HYDROGEN, METHYL, EHTYL, ISOPROPYL AND TERT-BUTYL; AND (C) POLYVINYL PYRROLIDONE, SAID THIOBISPHENOL AND SAID POLYVINYL PYRROLIDONE BEING STABILIZERS FOR THE FORMALDEHYDE POLYMER OR FORMALDEHYDE COPOLYMER, THE TOTAL AMOUNT OF STABILZERS (B) AND (C) RANGING FROM 0.01 TO 5.0% WEIGHT WITH RESPECT TO THE FORMALDEHYDE POLYMER OR FORMALDEHYDE COPOLYMER, AND THE WEIGHT RATIO OF THE THIOBISPHENOL (B) TO THE POLYVINYL PYRROLIDONE (C) BEING 0.1:1 TO 3.5:1.
Inventors
- 👤 Jacob Ackermann
- 👤 Gaudenzio Bianchi
- 👤 Pierino Radici
Bibliographic Details
Claims Analysis
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