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:
Mar. 26, 2024
Filed:
Jul. 11, 2017
Akzo Nobel Chemicals International B.v., Arnhem, NL;
Christina Nyholm, Sundsvall, SE;
Per Anders Restorp, Sävedalen, SE;
Anders Törncrona, Bohus, SE;
Helena Bergenudd, Sundsvall, SE;
Andreas Sundblom, Alingsås, SE;
Bo Andreasson, Sundsvall, SE;
NOURYON CHEMICALS INTERNATIONAL B.V., Arnhem, NL;
Abstract
The invention relates to a process for the manufacture of thermally expandable thermoplastic microspheres. The process comprises, providing a mixture of monomeric materials suitable for polymerisation to form a thermoplastic polymer and at least one blowing agent, providing to the mixture a colloidal silica that is surface-modified with at least hydrophobic organosilane groups and forming an emulsion. A polymerisation is performed to form the thermally expandable thermoplastic microspheres. The invention further relates to thermally expandable thermoplastic micro spheres, expanded micro spheres and their use in the manufacture of products.