Temperature-responsive material, temperature-responsive fiber and preparation method thereof

Patent metadata

Field	Value
Publication number	US-11739445-B2
Application number	US-202016835324-A
Country	US
Kind code	B2
Filing date	Mar 31, 2020
Priority date	Jul 8, 2019
Publication date	Aug 29, 2023
Grant date	Aug 29, 2023

Abstract

A temperature-responsive material having a structure represented by formula (I):is provided, where in formula (I), X has a structure represented by formula (i) or formula (ii):x and y are in a molar ratio of 9:1 to 1:3, n is an integer of 7 to 120, and m is an integer of 10 to 1,000.

First claim

What is claimed is:

1. A temperature-responsive material, comprising a structure represented by formula (I):

wherein in formula (I),
X has a structure represented by formula (i) or formula (ii):

x and y are in a molar ratio of 9:1 to 1:3,
n is an integer of 7 to 120, and
m is an integer of 10 to 1,000.

2. The temperature-responsive material according to claim 1 , wherein a weight-average molecular weight of the temperature-responsive material is 10,000 to 150,000.

3. The temperature-responsive material according to claim 1 , wherein a lower critical solution temperature (LCST) of the temperature-responsive material is 29° C. to 35° C.

4. A temperature-responsive fiber, comprising:
1 part by weight of a temperature-responsive material;
5 to 20 parts by weight of polybutylene terephthalate (PBT); and
50 to 200 parts by weight of polyethylene terephthalate (PET),
wherein the temperature-responsive material has a structure represented by formula (I):

wherein in formula (I),
X has a structure represented by formula (i) or formula (ii):

x and y are in a molar ratio of 9:1 to 1:3,
n is an integer of 7 to 120, and
m is an integer of 10 to 1,000.

5. The temperature-responsive fiber according to claim 4 , further comprising 0.1 to 0.35 parts by weight of an antioxidant, wherein the antioxidant is a hindered phenol antioxidant, a phosphorus antioxidant, or a combination thereof.

6. The temperature-responsive fiber according to claim 5 , wherein the antioxidant is a combination of the hindered phenol antioxidant and the phosphorus antioxidant at a ratio in a range of 1:5 to 5:1.

7. The temperature-responsive fiber according to claim 4 , wherein a fiber specification of the temperature-responsive fiber is 75d/72f to 75d/36f.

8. A method for preparing a temperature-responsive fiber, comprising:
providing an intrinsic temperature-responsive masterbatch, comprising evenly mixing 5 to 20 parts by weight of polybutylene terephthalate (PBT) and 1 part by weight of a temperature-responsive material and performing a powder refinement step, a powder dispersion step, and a kneading granulation step to form the intrinsic temperature-responsive masterbatch;
providing a base material masterbatch, wherein the base material masterbatch comprises polyethylene terephthalate (PET);
mixing 6 to 21 parts by weight of the intrinsic temperature-responsive masterbatch and 50 to 200 parts by weight of the base material masterbatch; and
performing a fiber spinning step to obtain a temperature-responsive fiber, wherein the temperature-responsive material has a structure represented by formula (I):

wherein in formula (I),
X has a structure represented by formula (i) or formula (ii):

x and y are in a molar ratio of 9:1 to 1:3,
n is an integer of 7 to 120, and
m is an integer of 10 to 1,000.

9. The method for preparing the temperature-responsive fiber according to claim 8 , wherein a spinning temperature is 270° C. to 295° C. and a spinning speed is 2,000 to 3,000 meters per minute in the fiber spinning step.

10. The method for preparing the temperature-responsive fiber according to claim 8 , wherein a particle size of the temperature-responsive material after the powder refinement step and the powder dispersion step is in a range of 1 μm to 500 μm.

11. The method for preparing the temperature-responsive fiber according to claim 8 , the step of evenly mixing 5 to 20 parts by weight of polybutylene terephthalate (PBT) and 1 part by weight of the temperature-responsive material comprising adding 0.1 to 0.35 parts by weight of an antioxidant and evenly mixing the antioxidant, the PBT, and the temperature-responsive material.

Assignees

• Taiwan Textile Res Inst

Inventors

• Chen Wen-Hsiang
• Lin Chun-Hung

Classifications

• D01F8/14 Primary

  with at least one polyester as constituent · CPC title

• C08G63/183

  Terephthalic acids · CPC title

• D01D5/082

  of mixed yarn · CPC title

• D01F6/36

  comprising unsaturated carboxylic acids or unsaturated organic esters as the major constituent · CPC title

• D01F8/18

  from other substances · CPC title