VINYL POLYMER MICROPARTICLES, AND MASTERBATCH AND RESIN FILM CONTAINING THE SAME

• US 20190322782A1
• Filed: 04/18/2019
• Published: 10/24/2019
• Est. Priority Date: 04/20/2018
• Status: Active Grant

• Current Assignee: Nippon Shokubai Company Limited
• Original Assignee: Nippon Shokubai Company Limited
• Inventors: NAKAMURA, Ryo, NAKATANI, Yasutaka, IGAWA, Yoichi, HANAI, Erina
• Granted Patent: US 11,421,126 B2
• Time in Patent Office: Days
• CPC Class Codes: C08F 220/14 Methyl esters , e.g. methyl (meth)acrylate
• CPC Class Codes: C08F 220/282 and containing two or more oxygen atoms
• CPC Class Codes: C08F 222/102 of dialcohols, e.g. ethylene glycol di(meth)acrylate or 1,4-butanediol dimethacrylate
• CPC Class Codes: C08F 2500/24 Polymer with special particle form or size
• CPC Class Codes: C08J 2333/10 Homopolymers or copolymers of methacrylic acid esters
• CPC Class Codes: C08J 2333/14 of esters containing halogen, nitrogen, sulfur, or oxygen atoms in addition to the carboxy oxygen
• CPC Class Codes: C08J 2423/12 Polypropene
• CPC Class Codes: C08J 3/226 using a polymer as a carrier
• CPC Class Codes: C08J 5/18 Manufacture of films or sheets
• CPC Class Codes: C08K 3/011 Crosslinking or vulcanising agents, e.g. accelerators
• CPC Class Codes: C08K 3/014 Stabilisers against oxidation, heat, light or ozone
• CPC Class Codes: C08L 2310/00 Masterbatches
• CPC Class Codes: C08L 33/10 Homopolymers or copolymers of methacrylic acid esters
• CPC Class Codes: C09D 123/04 Homopolymers or copolymers of ethene

Abstract

Provided are vinyl polymer microparticle which can reduce an average volume of the microparticles dropping off from a film surface while reducing the friction of the film. The vinyl polymer microparticles satisfy the following (1) to (3):

(1) a coefficient of variation of particle sizes is 30% or more on a volume basis;

(2) a proportion of vinyl polymer microparticles having a particle size of 1.7 times or more and 2.5 times or less a volume average particle size is 0.040% or less on a number basis; and

(3) a volume average particle size is 3.7 μm or more.

Claims

1. Vinyl polymer microparticles that satisfy the following (1) to (3):

(1) a coefficient of variation of particle sizes is 30% or more on a volume basis;

(2) a proportion of vinyl polymer microparticles having a particle size of 1.7 times or more and 2.5 times or less a volume average particle size is 0.040% or less on a number basis; and

(3) a volume average particle size is 3.7 μ

m or more.

2. The vinyl polymer microparticles according to claim 1, comprising a copolymer of a (meth)acrylic monofunctional monomer and a (meth)acrylic difunctional crosslinkable monomer.

3. The vinyl polymer microparticles according to claim 2, wherein the (meth)acrylic monofunctional monomer is a C_1-4 alkyl (meth)acrylate, and the (meth)acrylic difunctional crosslinkable monomer is an alkanediol di(meth)acrylate.

4. The vinyl polymer microparticles according to claim 1, wherein a residual amount of the (meth)acrylic monomer is 700 ppm or less.

5. A masterbatch comprising the vinyl polymer microparticles according to claim 1 and a resin.

6. The masterbatch according to claim 5, wherein the resin is a polyolefin resin.

7. A resin film comprising the vinyl polymer microparticles according to claim 1 and a resin.

8. The resin film according to claim 7, wherein a content of the vinyl polymer microparticles is 0.01% by mass or more and 10% by mass or less,

9. The resin film according to claim 7, having a thickness of 0.1 μ

m or more and 1 mm or less.