Syringe filled with resin composition and storage method therefor

Patent metadata

Field	Value
Publication number	US-11850625-B2
Application number	US-202017414754-A
Country	US
Kind code	B2
Filing date	Jan 29, 2020
Priority date	Feb 8, 2019
Publication date	Dec 26, 2023
Grant date	Dec 26, 2023

Abstract

There are provided a syringe filled with a resin composition and a storage method thereof. According to the syringe and the storage method, mixed air, which causes the resin composition to be intermittently discharged from the syringe, is suppressed. The syringe filled with the resin composition includes a syringe, a resin composition filling the syringe, and a plunger. The resin composition contains voids. The ratio of the volume of the voids relative to the volume of the resin composition is 1.0 ppm by volume to 520 ppm by volume. The voids have a maximum diameter of 2,500 μm or less.

First claim

The invention claimed is:

1. A syringe filled with a resin composition, comprising:
a syringe;
a resin composition filling the syringe; and
a plunger, wherein
the resin composition contains voids,
a ratio of a volume of the voids relative to a volume of the resin composition is 1.0 ppm by volume to 520 ppm by volume, and
the voids have a maximum diameter of 2,500 μm or less.

2. The syringe filled with the resin composition according to claim 1 ,
wherein the voids have an average diameter of 200 μm to 400 μm or less.

3. The syringe filled with the resin composition according to claim 1 ,
wherein the resin composition includes at least one resin selected from epoxy resin and acrylic resin.

4. The syringe filled with the resin composition according to claim 1 ,
wherein the resin composition has a viscosity of 2.5 Pa·s to 650 Pa·s, when a viscosity of less than 200 Pa·s is measured at a rotational speed of 50 rpm, and a viscosity of 200 Pa·s or more is measured at a rotational speed of 10 rpm, at 25° C. using a rotary viscometer.

5. The syringe filled with the resin composition according to claim 1 ,
wherein thixotropic indices TI1 to TI3 measured under any of conditions (1) to (3) below, in the resin composition, are 0.8 to 3.5:
(1) Thixotropic index TI1 that is a ratio between a viscosity at 5 rpm and a viscosity at 50 rpm, when a viscosity at 50 rpm measured at 25° C. using a rotary viscometer is in a range of not less than 2.5 Pa·s and less than 20 Pa·s,
(2) Thixotropic index TI2 that is a ratio between a viscosity at 5 rpm and a viscosity at 50 rpmn, when a viscosity at 50 rpm measured at 25° C. using a rotary viscometer is in a range of not less than 20 Pa·s and less than 200 Pa·s, and
(3) Thixotropic index TI3 that is a ratio between a viscosity at 1 rpm and a viscosity at 10 rpm, when a viscosity at 10 rpm measured at 25° C. using a rotary viscometer is in a range of 200 Pa·s or more and 1,000 Pa·s or less.

6. The syringe filled with the resin composition according to claim 1 ,
wherein the syringe is made from polypropylene or polyethylene.

7. The syringe filled with the resin composition according to claim 1 ,
wherein the syringe has a capacity of 1 cm 3 to 600 cm 3 .

8. A storage method of a syringe filled with a resin composition, comprising
storing the syringe filled with the resin composition according to claim 1 at a temperature of −80° C. to 0° C.

Assignees

• Namics Corp

Inventors

• MYODO Hiroki
• Sakai Yosuke
• Hoshiyama Masaaki

Classifications

• B05C17/00593 Primary

  Hand tools of the syringe type · CPC title

• C08F222/102

  of dialcohols, e.g. ethylene glycol di(meth)acrylate or 1,4-butanediol dimethacrylate · CPC title

• C08G59/245

  aromatic · CPC title

• C08G59/5033 Primary

  aromatic · CPC title

• B05C5/02 Primary

  {the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g.} from an outlet device in contact or almost in contact, with the work · CPC title