US 12,351,681 B2
Polyol block copolymer, compositions and processes therefor
James Leeland, Macclesfield (GB); Rakibul Kabir, Macclesfield (GB); Kerry Riley, Macclesfield (GB); and Michael Kember, Macclesfield (GB)
Assigned to Econic Technologies, Ltd., Macclesfield (GB)
Appl. No. 17/608,249
Filed by ECONIC TECHNOLOGIES LTD, Macclesfield (GB)
PCT Filed May 1, 2020, PCT No. PCT/GB2020/051082
§ 371(c)(1), (2) Date Nov. 2, 2021,
PCT Pub. No. WO2020/222018, PCT Pub. Date Nov. 5, 2020.
Claims priority of application No. 1906210 (GB), filed on May 2, 2019.
Prior Publication US 2022/0227925 A1, Jul. 21, 2022
Int. Cl. C08G 64/18 (2006.01); C08G 18/10 (2006.01); C08G 18/44 (2006.01); C08G 18/70 (2006.01); C08G 64/02 (2006.01); C08G 64/34 (2006.01); C08G 65/26 (2006.01)
CPC C08G 64/183 (2013.01) [C08G 18/44 (2013.01); C08G 64/34 (2013.01); C08G 65/2603 (2013.01); C08G 65/2606 (2013.01); C08G 65/2663 (2013.01); C08G 18/10 (2013.01); C08G 18/70 (2013.01); C08G 64/0208 (2013.01); C08G 2650/36 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A polyol block copolymer comprising a polycarbonate block, A, (A′-Z′—Z—(Z′-A′) n-), and polyethercarbonate blocks, B, wherein the polyol block copolymer has the polyblock structure:
B-A′-Z′—Z—(Z′-A′-B)n
wherein n=t−1 and wherein t=the number of terminal OH group residues on the block A;
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;
wherein Z′—Z—(Z′) n is a starter residue; wherein Z is selected from optionally substituted alkylene, alkenylene, alkynylene, heteroalkylene, heteroalkenylene, heteroalkynylene, cycloalkylene, cycloalkenylene, heterocycloalkylene, heterocycloalkenylene, arylene, heteroarylene, an alkylarylene, heteroalkylarylene, heteroalkylheteroarylene or alkylheteroarylene group, or Z may be a combination of any of these groups;
wherein Z′ is selected from —O—, —NR′—, —S—, —C(O)O—, —P(O) (OR′)O—, —PR′ (O) (O—)2 or —PR′ (O)O—;
wherein R′ is selected from H, or optionally substituted alkyl, heteroalkyl, aryl, heteroaryl, cycloalkyl or heterocycloalkyl; and
wherein the polycarbonate block A is prepared using an epoxide.