Resin formed body having surface that exhibits excellent water-sliding property

Patent metadata

Field	Value
Publication number	US-10266735-B2
Application number	US-201414896721-A
Country	US
Kind code	B2
Filing date	Jun 24, 2014
Priority date	Jul 2, 2013
Publication date	Apr 23, 2019
Grant date	Apr 23, 2019

Abstract

A resin formed body 10 having a surface in which hydrophobic fine particles 11 are distributed, the hydrophobic fine particles having a BET specific surface area of not less than 300 m 2 /g. Despite the hydrophobic fine particles are added in a small amount, the resin formed body exhibits a high water-sliding property and can be used also in the form of a film and a bottle.

First claim

The invention claimed is:

1. A resin formed body having a surface in which hydrophobic fine particles are distributed, (a) said hydrophobic fine particles are dispersed in a surface resin layer that forms the surface of said resin formed body in an amount of 40 to 100 parts by weight per 100 parts by weight of the resin, said hydrophobic particles being dispersed so as to be partly exposed on the surface of the resin formed body;
(b) said hydrophobic fine particles have a BET specific surface area of not smaller than 400 m 2 /g; and
wherein the surface of the resin formed body in which said hydrophobic fine particles are distributed has a sliding angle of not more than 5°, the sliding angle being defined as a tilt angle of said surface with respect to the horizontal plane and on which a 30 mg of pure water that is dropped thereon slides down thereon.

2. The resin formed body according to claim 1 , wherein
said hydrophobic fine particles are fine silica particles having a hydrophobic functional group introduced into the surfaces thereof.

3. The resin formed body according to claim 2 , wherein said hydrophobic functional group is an alkylsilyl group, an alkyl group, a fluoroalkylsilyl group or a fluoroalkyl group.

4. The resin formed body according to claim 1 , wherein said resin formed body has the form of a film, and said hydrophobic fine particles are distributed on said film.

5. The resin formed body according to claim 1 , wherein said resin formed body has the form of a bottle, and said hydrophobic fine particles are distributed in an inner surface or in a mouth portion of said bottle.

6. The resin formed body according to claim 1 , wherein said resin formed body has the form of a pouring fitting or a cap, and said hydrophobic fine particles are distributed in a portion that turns into a content solution pouring passage in the pouring fitting or in the cap.

7. The resin formed body according to claim 1 , wherein said resin formed body has the form of a tray, and said hydrophobic fine particles are distributed on an inner surface of said tray.

8. The resin formed body according to claim 1 , wherein said resin formed body has the form of a cup, and said hydrophobic fine particles are distributed on an inner surface of said cup.

9. The resin formed body according to claim 1 , wherein hydrophobic particles having a BET specific surface area of less than 400 m 2 /g are substantially not present in the surface resin layer that forms the resin formed body.

10. A resin formed body having a surface in which hydrophobic fine particles are distributed, (a) said hydrophobic fine particles are dispersed in a surface resin layer that forms the surface of said resin formed body in an amount of 40 to 100 parts by weight per 100 parts by weight of the resin, said hydrophobic particles being dispersed so as to be partly exposed on the surface of the resin formed body;
(b) said hydrophobic fine particles have a BET specific surface area of not smaller than 400 m 2 /g; and
wherein said resin formed body has the form of a bottle, and said hydrophobic fine particles are distributed in an inner surface or in a mouth portion of said bottle.

11. A resin formed body having a surface in which hydrophobic fine particles are distributed, (a) said hydrophobic fine particles are dispersed in a surface resin layer that forms the surface of said resin formed body in an amount of 40 to 100 parts by weight per 100 parts by weight of the resin, said hydrophobic particles being dispersed so as to be partly exposed on the surface of the resin formed body;
(b) said hydrophobic fine particles have a BET specific surface area of not smaller than 400 m 2 /g; and
wherein said resin formed body has the form of a pouring fitting or a cap, and said hydrophobic fine particles are distributed in a portion that turns into a content solution pouring passage in the pouring fitting or in the cap.

12. A resin formed body having a surface in which hydrophobic fine particles are distributed, (a) said hydrophobic fine particles are dispersed in a surface resin layer that forms the surface of said resin formed body in an amount of 40 to 100 parts by weight per 100 parts by weight of the resin, said hydrophobic particles being dispersed so as to be partly exposed on the surface of the resin formed body;
(b) said hydrophobic fine particles have a BET specific surface area of not smaller than 400 m 2 /g; and
wherein said resin formed body has the form of a tray, and said hydrophobic fine particles are distributed on an inner surface of said tray.

Assignees

• Toyo Seikan Group Holdings Ltd

Inventors

• Iwamoto Shinya
• Akutsu Yosuke

Classifications

• C08J2367/02

  Polyesters derived from dicarboxylic acids and dihydroxy compounds; (C08J2367/06 takes precedence) · CPC title

• C08K2201/013

  Additives applied to the surface of polymers or polymer particles · CPC title

• C08J2467/02

  Polyesters derived from dicarboxylic acids and dihydroxy compounds (C08J2467/06 takes precedence) · CPC title

• C08J7/0427

  with only one layer of a composition containing a polymer binder (with more layers C08J7/042) · CPC title

• C09K3/18 Primary

  for application to surfaces to minimize adherence of ice, mist or water thereto (rendering particulate materials free flowing, in general, e.g. making them hydrophobic B01J2/30); Thawing or antifreeze materials for application to surfaces (used in liquids for heat-transfer, heat-exchange or heat-storage or for the production of heat or cold other than by combustion, e.g. radiator liquids, C09K5/00) · CPC title