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:
Jul. 08, 2025
Filed:
May. 01, 2020
Econic Technologies Ltd, Macclesfield, GB;
James Leeland, Macclesfield, GB;
Rakibul Kabir, Macclesfield, GB;
Kerry Riley, Macclesfield, GB;
Michael Kember, Macclesfield, GB;
Econic Technologies, Ltd., Macclesfield, GB;
Abstract
A polyol block copolymer comprising a polycarbonate block, A (-A'-Z′—Z—(Z′-A′)-), and polyethercarbonate blocks, B. The polyol block copolymer has the polyblock structure:B-A′-Z′—Z—(Z′-A′-B)wherein n=t−1 and wherein t=the number of terminal OH group residues on the block A; and wherein each A′ is independently a polycarbonate chain having at least 70% carbonate linkages, and wherein each B is independently a polyethercarbonate chain having 50-99% ether linkages and at least 1% carbonate linkages; and wherein Z′—Z—(Z′)is a starter residue. A process of producing a polyol block copolymer from a two step process carried out in two reactors, and products and compositions incorporating such copolymers.