CROSSLINKED POLYMER NANOPARTICLES CONTAINING COMPOSITION, METHOD FOR PREPARING A COPOLYMER USING THE COMPOSITION, AND VINYL CHLORIDE RESIN WITH IMPROVED FOAM MOLDING PROPERTIES

• US 20140073713A1
• Filed: 08/14/2012
• Published: 03/13/2014
• Est. Priority Date: 04/03/2012
• Status: Active Grant

• Current Assignee: LG Chem Limited (LG Corporation)
• Original Assignee: LG Chem Limited (LG Corporation)
• Inventors: Kim, Yoon Ho, Kim, Geon Soo, Lee, Kwang Jin
• Granted Patent: US 9,150,720 B2
• Time in Patent Office: Days
• US Class Current: 521/139
• CPC Class Codes: C08J 2327/06 Homopolymers or copolymers of vinyl chloride
• CPC Class Codes: C08J 2425/14 with unsaturated esters
• CPC Class Codes: C08J 2433/06 of esters containing only carbon, hydrogen, and oxygen, the oxygen atom being present only as part of the carboxyl radical
• CPC Class Codes: C08J 9/0061 characterized by the use of several polymeric components
• CPC Class Codes: C08L 2205/02 containing two or more polymers of the same C08L -group
• CPC Class Codes: C08L 2205/22 Mixtures comprising a continuous polymer matrix in which are dispersed crosslinked particles of another polymer
• CPC Class Codes: C08L 2312/00 Crosslinking
• CPC Class Codes: C08L 25/14 with unsaturated esters
• CPC Class Codes: C08L 27/06 Homopolymers or copolymers of vinyl chloride
• CPC Class Codes: C08L 33/12 Homopolymers or copolymers of methyl methacrylate
• CPC Class Codes: C08L 33/20 Homopolymers or copolymers of acrylonitrile C08L55/02 takes precedence
• CPC Class Codes: C08L 51/003 grafted on to macromolecular compounds obtained by reactions only involving unsaturated carbon-to-carbon bonds C08L51/04, C08L51/06 take precedence

Abstract

Disclosed is a crosslinked polymer nanoparticle containing composition, a method for preparing a copolymer using the composition, and a vinyl chloride resin with improved foam molding properties. Processing aid in according with the present invention, provides the effects of improved foam molding properties and processibility of a vinyl chloride resin, during a foam molding process upon being added to the vinyl chloride resin.

Claims

1. A crosslinked polymer nanoparticle containing composition comprising:

2 to 20% by weight of crosslinked polymer nanoparticles having an average particle size of 40 to 100 nm; and

80 to 98% by weight of a vinyl-based copolymer, based on the total weight of the composition.

2. The crosslinked polymer nanoparticle containing composition according to claim 1, wherein the composition is a mixed phase between a latex of the crosslinked polymer nanoparticles and a latex of the vinyl-based copolymer.

3. The crosslinked polymer nanoparticle containing composition according to claim 1, wherein the composition is a mixed phase between a latex of the crosslinked polymer nanoparticles and initial materials for the vinyl-based copolymer comprising an alkyl (meth)acrylate monomer, an aromatic vinyl monomer, and a vinyl cyanide monomer.

4. The crosslinked polymer nanoparticle containing composition according to claim 1, wherein the crosslinked polymer nanoparticles are polymers consisting of 95 to 99.8% by weight of a vinyl monomer and 0.2 to 5% by weight of a crosslinking agent.

5. The crosslinked polymer nanoparticle containing composition according to claim 4, wherein the vinyl monomer comprises at least one compound selected from the group consisting of methyl acrylate, ethyl acrylate, n-butyl acrylate, lauryl acrylate, stearyl acrylate, 2-ethylhexyl acrylate, cyclohexyl acrylate, methyl methacrylate, n-butyl methacrylate, lauryl methacrylate, stearyl methacrylate, tridecyl methacrylate, iso-butyl methacrylate, t-butyl methacrylate, 2-ethylhexyl methacrylate, and cyclohexyl methacrylate.

6. The crosslinked polymer nanoparticle containing composition according to claim 5, wherein the vinyl monomer comprises 4.8 to 25% by weight of at least one alkyl acrylate monomer selected from the group consisting of methyl acrylate, ethyl acrylate, n-butyl acrylate, lauryl acrylate, stearyl acrylate, 2-ethylhexyl acrylate, and cyclohexyl acrylate;

and 70 to 95% by weight of at least one alkyl methacrylate monomer selected from the group consisting of methyl methacrylate, n-butyl methacrylate, lauryl methacrylate, stearyl methacrylate, tridecyl methacrylate, iso-butyl methacrylate, t-butyl methacrylate, 2-ethylhexyl methacrylate, and cyclohexyl methacrylate.

7. The crosslinked polymer nanoparticle containing composition according to claim 4, wherein the crosslinking agent is at least one compound selected from the group consisting of divinyl benzene, 3-butanediol diacrylate, 1,3-butanediol dimethacrylate, 1,4-butanediol diacrylate, 1,4-butanediol dimethacrylate, allyl acrylate, allyl methacrylate, trimethylolpropane triacrylate, tetraethylene glycol diacrylate, and tetraethylene glycol dimethacrylate.

8. The crosslinked polymer nanoparticle containing composition according to claim 1, wherein the vinyl-based copolymer is a copolymer of 10 to 70% by weight of the alkyl (meth)acrylate monomer;

12 to 72% by weight of the aromatic vinyl monomer; and

6 to 36% by weight of the vinyl cyanide monomer.

9. The crosslinked polymer nanoparticle containing composition according to claim 8, wherein the alkyl (meth)acrylate monomer is at least one compound selected from the group consisting of methyl acrylate, methyl methacrylate, ethyl acrylate, ethyl methacrylate, n-butyl acrylate, n-butyl methacrylate, iso-butyl methacrylate, t-butyl methacrylate, lauryl acrylate, lauryl methacrylate, stearyl acrylate, stearyl methacrylate, tridecyl acrylate, tridecyl methacrylate, 2-ethylhexyl acrylate, 2-ethylhexyl methacrylate, cyclohexyl acrylate, and cyclohexyl methacrylate.

10. The crosslinked polymer nanoparticle containing composition according to claim 8, wherein the aromatic vinyl monomer is at least one compound selected from the group consisting of styrene, α

-methyl styrene, t-butyl styrene, chlorostyrene, and p-methyl styrene.

11. The crosslinked polymer nanoparticle containing composition according to claim 8, wherein the vinyl cyanide monomer is at least one compound selected from the group consisting of acrylonitrile, methacrylonitrile, fumaronitrile, α

-chloronitrile, and α

-cyano ethyl acrylonitrile.

12. A method for preparing a crosslinked polymer nanoparticle containing copolymer, the method comprising steps of:

preparing a latex of crosslinked polymer nanoparticles having an average particle size of 40 to 100 nm by polymerizing 95 to 99.8% by weight of a vinyl monomer and 0.2 to 5% by weight of a crosslinking agent; and

adding 2 to 20% by weight of the latex of crosslinked polymer nanoparticles to a monomer mixture consisting of 10 to 70% by weight of an alkyl (meth)acrylate monomer, 12 to 72% by weight of an aromatic vinyl monomer, and 6 to 36% by weight of a vinyl cyanide monomer, and then sequentially polymerizing the mixture.

13. The method according to claim 12, further comprising the step of obtaining a powder of the crosslinked polymer nanoparticle containing copolymer by spray drying or agglomerate drying the resultant obtained by the polymerization.

16. A foam molded properties reinforced vinyl chloride resin obtained by a formulation of the copolymer powder prepared according to the method of claim 13 of 1 to 20 parts by weight, on 100 parts by weight of the vinyl chloride resin.

14. A method for preparing a crosslinked polymer nanoparticle containing copolymer, the method comprising sequential steps of:

preparing crosslinked polymer nanoparticles having an average particle size of 40 to 100 nm by polymerizing 95 to 99.8% by weight of a vinyl monomer and 0.2 to 5% by weight of a crosslinking agent;

preparing a vinyl-based copolymer by polymerizing 10 to 70% by weight of an alkyl (meth)acrylate monomer, 12 to 72% by weight of an aromatic vinyl monomer, and 6 to 36% by weight of a vinyl cyanide monomer; and

mixing 2 to 20% by weight of the crosslinked polymer nanoparticles and 80 to 98% by weight of the vinyl-based copolymer in a latex form.

15. The method according to claim 14, further comprising the step of obtaining a powder of the crosslinked polymer nanoparticle containing copolymer by spray drying or agglomerate drying the resultant obtained by the polymerization.