Composition including polyrotaxane and product including the same

Patent metadata

Field	Value
Publication number	US-10273364-B2
Application number	US-201615270374-A
Country	US
Kind code	B2
Filing date	Sep 20, 2016
Priority date	Oct 1, 2015
Publication date	Apr 30, 2019
Grant date	Apr 30, 2019

Abstract

A composition includes a polyrotaxane (A) which includes cyclodextrin as a ring molecule and polyethylene glycol as a linear molecule, and in which a blocking group is arranged at both ends of the linear molecule; a block copolymer (B) including polysiloxane; and a polymer (C) including no polysiloxane.

First claim

The invention claimed is:

1. A composition comprising:
10 parts by mass of a polyrotaxane (A) which includes cyclodextrin as a ring molecule and polyethylene glycol as a linear molecule, and in which a blocking group is arranged at both ends of the linear molecule;
4 parts by mass to 16 parts by mass of a block copolymer (B) including polysiloxane as a crosslinking agent for the polyrotaxane; and
7 parts by mass to 11 parts by mass of a polymer (C) including no polysiloxane,
wherein the block copolymer (B) including polysiloxane has blocked isocyanate groups at its ends, and
wherein the polymer (C) including no polysiloxane has blocked isocyanate groups at its ends.

2. The composition according to claim 1 , wherein, in the polyrotaxane (A), at least a part of hydroxy groups in the cyclodextrin is substituted with a substituent having a graft chain.

3. The composition according to claim 2 , wherein the graft chain is formed by ring-opening polymerization of lactone monomers.

4. The composition according to claim 1 , wherein the block copolymer (B) including polysiloxane is a polyester-polysiloxane block copolymer.

5. The composition according to claim 4 , wherein the polyester-polysiloxane block copolymer is a polycaprolactone-polydimethylsiloxane block copolymer.

6. The composition according to claim 1 , wherein the polymer (C) including no polysiloxane is at least a copolymer selected from polyether and polyester.

7. A cured product comprising the composition as claimed in claim 1 , wherein
ring molecules of polyrotaxanes (A) are bonded to each other at crosslinking parts, and
at least a part of the crosslinking parts is the block copolymer (B) including polysiloxane.

8. A cured film comprising the cured product as claimed in claim 7 .

9. A dielectric sheet with electrode layers comprising the cured film as claimed in claim 8 serving as a dielectric material, wherein
an electrode layer is attached to opposite surfaces of the cured film.

10. The dielectric sheet with electrode layers according to claim 9 , wherein a dielectric breakdown electric field strength of the dielectric sheet with electrode layers at normal temperature and normal humidity after being left under conditions at a temperature of 60° C. and a relative humidity of 90% for 500 hours is 90% or higher, relative to a dielectric breakdown electric field strength of the dielectric sheet with electrode layers at normal temperature and normal humidity immediately after preparation.

11. An actuator comprising the dielectric sheet with electrode layers as claimed in claim 9 .

Assignees

• Toyoda Gosei Kk
• Advanced Softmaterials Inc

Inventors

• Nakai Takanori
• Takeuchi Hiromitsu
• Inoue Katsunari

Classifications

• C08L71/02

  Polyalkylene oxides · CPC title

• C08G77/445

  containing polyester sequences · CPC title

• C08L83/10 Primary

  Block- or graft-copolymers containing polysiloxane sequences (obtained by polymerising a compound having a carbon-to-carbon double bond on to a polysiloxane C08L51/08, C08L53/00) · CPC title

• H01L41/083

  Electricity · mapped topic

• C08G83/007

  Polyrotaxanes; Polycatenanes · CPC title