Spacer particle for resin composition layer and use thereof

Patent metadata

Field	Value
Publication number	US-9975970-B2
Application number	US-201214345500-A
Country	US
Kind code	B2
Filing date	Sep 27, 2012
Priority date	Sep 27, 2011
Publication date	May 22, 2018
Grant date	May 22, 2018

Abstract

Spacer particles for a resin composition layer have a compressive strength at 10% compressive deformation (10% compressive strength) at room temperature (rt) of 0.05 to 10 MPa, have a rate of change in 10% compressive strength-by a temperature change from rt to 50° C. of 5% or less or have a rate of change in 10% compressive strength by a temperature change from −20° C. to rt of 30% or less, and have a volume average particle diameter of 2 to 200 μm and a coefficient of variation in particle diameter of 15% or less.

First claim

The invention claimed is:

1. Spacer particles for a resin composition layer, the spacer particles being used for being added into the resin composition layer for controlling a thickness of the resin composition layer,
the spacer particles having a compressive strength at 10% compressive deformation at room temperature ranging from 0.05 to 2.06 MPa,
the spacer particles having a rate of change in compressive strength at 10% compressive deformation by a temperature change from room temperature to 50° C. of 5% or less,
the spacer particles having a volume average particle diameter ranging from 2 to 200 μm,
the spacer particles having a coefficient of variation in particle diameter of 15% or less, and the spacer particles consisting of a cross-linked acrylic ester resin that is a polymer of a monomer mixture containing an acrylic ester monofunctional monomer in an amount of 50 to 95% by mass and a cross-linkable monomer in an amount of 5 to 50% by mass.

2. The spacer particles for a resin composition layer according to claim 1 ,
wherein the spacer particles have a rate of change in compressive strength at 10% compressive deformation by a temperature change from −20° C. to room temperature of 30% or less.

3. The spacer particles for a resin composition layer according to claim 1 ,
wherein the acrylic ester monofunctional monomer is an acrylic ester of a C 1-8 alcohol.

4. A laminated sheet comprising:
a sheet substrate; and
a resin composition layer on the sheet substrate,
the resin composition layer comprising the spacer particles for a resin composition layer according to claim 1 .

5. Spacer particles for a resin composition layer, the spacer particles being used for being added into the resin composition layer for controlling a thickness of the resin composition layer,
the spacer particles having a compressive strength at 10% compressive deformation at room temperature ranging from 0.05 to 2.06 MPa,
the spacer particles having a rate of change in compressive strength at 10% compressive deformation by a temperature change from −20° C. to room temperature of 30% or less,
the spacer particles having a volume average particle diameter ranging from 2 to 200 μm,
the spacer particles having a coefficient of variation in particle diameter of 15% or less, and the spacer particles consisting of a cross-linked acrylic ester resin that is a polymer of a monomer mixture containing an acrylic ester monofunctional monomer in an amount of 50 to 95% by mass and a cross-linkable monomer in an amount of 5 to 50% by mass.

6. The spacer particles for a resin composition layer according to claim 5 ,
wherein the acrylic ester monofunctional monomer is an acrylic ester of a C 1-8 alcohol.

7. A laminated sheet comprising:
a sheet substrate; and
a resin composition layer on the sheet substrate,
the resin composition layer comprising the spacer particles for a resin composition layer according to claim 5 .

8. Spacer particles for a resin composition layer, the spacer particles being used for being added into the resin composition layer for controlling a thickness of the resin composition layer,
the spacer particles having a compressive strength at 10% compressive deformation at room temperature ranging from 0.05 to 2.06 MPa,
the spacer particles having a compressive load at room temperature ranging from 0.01 to 2 N, the compressive load being determined at 10% compressive deformation in a thickness direction of the resin composition layer, when the spacer particles are added into the resin composition layer so that the resin composition layer contains 48% by mass of the spacer particles,
the spacer particles having a rate of change in compressive load by a temperature change from −50° C. to 50° C. of 15% or less, the compressive load being determined at 10% compressive deformation in a thickness direction of the resin composition layer, when the spacer particles are added into the resin composition layer so that the resin composition layer contains 48% by mass of the spacer particles,
the spacer particles having a volume average particle diameter ranging from 2 to 200 μm,
the spacer particles having a coefficient of variation in particle diameter of 15% or less, and the spacer particles consisting of a cross-linked acrylic ester resin that is a polymer of a monomer mixture containing an acrylic ester monofunctional monomer in an amount of 50 to 95% by mass and a cross-linkable monomer in an amount of 5 to 50% by mass.

9. The spacer particles for a resin composition layer according to claim 8 ,
wherein the acrylic ester monofunctional monomer is an acrylic ester of a C 1-8 alcohol.

10. A laminated sheet comprising:
a sheet substrate; and
a resin composition layer on the sheet substrate,
the resin composition layer comprising the spacer particles for a resin composition layer according to claim 8 .

Assignees

• Sekisui Plastics

Inventors

• Harada Ryosuke
• Takahashi Tomoyuki
• Ishimori Fumitaka

Classifications

• C08L33/08

  Homopolymers or copolymers of acrylic acid esters · CPC title

• Y10T428/254

  Polymeric or resinous material · CPC title

• C08F2500/24

  Polymer with special particle form or size · CPC title

• C08F2/18 Primary

  Suspension polymerisation · CPC title

• Y10T428/2982

  Particulate matter [e.g., sphere, flake, etc.] · CPC title