US 2026/0042876 A1 · LOW Tg MULTI-TETHER COPOLYMERIZED DIBLOCK COPOLYMERS FOR DIRECTED SELF-ASSEMBLY

Abstract

Disclosed are two different block copolymer families having general structures (I) or (III), composition thereof, and the process of using these compositions for DSA; wherein B segment and B1 segment are polar block copolymer segments comprising either alkyl 2-methylenealkanoate derived repeating units, lactone derived repeat units, oxirane derived repeat units, oxetane or cyclic carbonate derived repeat units; L and L1 are either a direct valence bond or a linking moiety derived from a 1,1-diarylethene; A segment and A1 are non-polar block copolymer segment comprising styrenic repeat unit, E′, E″ E3 and E4 are different types of end groups, A2 is a block segment derived from an olefin or a diene having a Tg of about −5° C. to about −50° C., and in structure (I) is multi-tethered with oligo flexible tethered groups at various positions as outlined. E′-A-L-B-E″ (I) E3-A1-A2-L1-B1-E4 (III)

Claims48

Dependent claims

A block copolymer having structure (I), wherein

A segment is a non-polar block copolymer segment comprising styrenic repeat units,
L is either a direct valence bond or a linking moiety derived from a 1,1-diarylethene;
B segment is a polar block copolymer segment comprising either alkyl 2-methylenealkanoate derived repeating units, lactone derived repeat units, oxirane derived repeat units, oxetane derived repeating units, or cyclic carbonate derived repeat units;
E′ is a C-1 to C-12 alkyl end group,
E″ is and end group selected from H an alkyl, a carbonylalkyl (—C═O-alkyl), a carbonyloxyalkyl (—C═O—O-alkyl, and an alkyl 2-arylacrylate derived end group (—CH2—CH(Aryl)(C(═O))—O-alkyl);
and further,
said block copolymer of structure (1) is multi-tethered with oligo flexible tethered groups which are selected from oligo linear alkylene tethered groups, oligo ether tethered groups, and oligo dialkyl siloxane tethered groups, and these oligo flexible tethered groups are multi-tethered on at least one of either the A segments, B segments, and L, if L is a linking moiety derived from a 1,1-diarylethene, and said block copolymer has a polydispersity ranging from 1 to about 1.09, and a Mn of at least 40,000:

4 more elements

A block copolymer having structure (III), wherein

A1 is a styrenic block copolymer segment, which has a Tg from about 50° C. to about 100° C.
A2 is block copolymer segment with a Tg ranging from about −5° C. to about −50° C., which comprises repeat units derived from either an olefin selected from the group consisting of an alkene, an alkadiene, and an alkatriene, or a from mixture of at least two different olefins selected from this group;
B1 is a polar block copolymer segment, which has a Tg of about 50° C. to about 100° C., comprising either alkyl 2-methylenealkanoate derived repeating units, lactone derived repeat units, oxirane derived repeat units, oxetane derived repeating units, or cyclic carbonate derived repeat units;
L1 is either a direct valence bond or a linking moiety derived from a 1,1-diarylethene;
wherein
E3 is an alkyl,
E4 is an groups selected from H, an alkyl, a carbonylalkyl (—C═O-alkyl), a carbonyloxyalkyl (—C═O—O-alkyl, and an alkyl 2-arylacrylate derived end group (—CH2—CH(Aryl)(C(═O))—O-alkyl), and further wherein
said block copolymer has a polydispersity ranging from 1 to about 1.09,

5 more elements

Dependencies are inferred from the claim text.

LOW Tg MULTI-TETHER COPOLYMERIZED DIBLOCK COPOLYMERS FOR DIRECTED SELF-ASSEMBLY

Life of this patent

LOW Tg MULTI-TETHER COPOLYMERIZED DIBLOCK COPOLYMERS FOR DIRECTED SELF-ASSEMBLY

Life of this patent

Abstract

Claims48