Composition for preparing vinyl chloride-based polymer and method for preparing vinyl chloride-based polymer using the same

Patent metadata

Field	Value
Publication number	US-11912810-B2
Application number	US-201917058316-A
Country	US
Kind code	B2
Filing date	Oct 7, 2019
Priority date	Oct 8, 2018
Publication date	Feb 27, 2024
Grant date	Feb 27, 2024

Abstract

The present disclosure provides a composition for preparing a vinyl chloride-based polymer, including a vinyl chloride-based first seed; a vinyl chloride-based second seed; an initiator composition including a water-soluble initiator and an oil-soluble initiator; a reducing agent; and a vinyl chloride-based monomer, wherein a metal catalyst is not included in the composition, and a method for preparing a vinyl chloride-based polymer using the same.

First claim

The invention claimed is:

1. A composition for preparing a vinyl chloride-based polymer, the composition comprising:
a vinyl chloride-based first seed;
a vinyl chloride-based second seed;
an initiator composition comprising a water-soluble initiator and an oil-soluble initiator;
a reducing agent; and
a vinyl chloride-based monomer,
wherein the composition does not comprise a metal catalyst, and
wherein an amount of the reducing agent is 60 to 100 ppm based on a weight of the vinyl chloride-based monomer.

2. The composition of claim 1 , wherein the first seed is comprised in 2.5 to 10 parts by weight based on 100 parts by weight of the vinyl chloride-based monomer.

3. The composition of claim 1 , wherein the second seed is comprised in 2.5 to 10 parts by weight based on 100 parts by weight of the vinyl chloride-based monomer.

4. The composition of claim 1 , wherein the water-soluble initiator is one or more selected from the group consisting of potassium persulfate, sodium persulfate, ammonium persulfate and hydrogen peroxide.

5. The composition of claim 1 , wherein an amount of the water-soluble initiator is 160 to 360 ppm based on a weight of the vinyl chloride-based monomer.

6. The composition of claim 1 , wherein the oil-soluble initiator is one or more selected from the group consisting of lauryl peroxide (LPO), di-2-ethylhexyl peroxycarbonate (OPP), diisopropyl peroxy dicarbonate, t-butyl peroxypivalate, t-butylperoxyneodecanoate and 2,2-azobisisobutyronitrile.

7. The composition of claim 1 , wherein an amount of the oil-soluble initiator is 500 to 1000 ppm based on a weight of the vinyl chloride-based monomer.

8. The composition of claim 1 , wherein the reducing agent is one or more selected from the group consisting of ascorbic acid, potassium metabisulfite (PMBS) and sodium formaldehyde sulfoxylate (SFS).

Assignees

• Lg Chemical Ltd

Inventors

• Youk Kyung Seog
• Bae Heung Kwon
• Lee Jung Rae
• Lee Hyun Min
• Lim Joong Chul
• Kang Min Jeong

Classifications

• C08F4/38 Primary

  Mixtures of peroxy-compounds · CPC title

• C08F2/22

  Emulsion polymerisation · CPC title

• C08F2/26 Primary

  anionic · CPC title

• C08F257/00 Primary

  Macromolecular compounds obtained by polymerising monomers on to polymers of aromatic monomers as defined in group C08F12/00 · CPC title

• C08F14/06

  Vinyl chloride · CPC title