Article comprising a polymer body and a metal plating
US-2020157699-A1 · May 21, 2020 · US
Method for preparing graft copolymer and thermoplastic resin molded article
US11214645B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11214645-B2 |
| Application number | US-201916767465-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jan 23, 2019 |
| Priority date | Feb 7, 2018 |
| Publication date | Jan 4, 2022 |
| Grant date | Jan 4, 2022 |
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Abstract
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The present invention relates to a method for preparing a graft copolymer including polymerizing a conjugated diene-based monomer to prepare a small-size conjugated diene-based polymer; enlarging the small-size conjugated diene-based polymer to prepare a large-size conjugated diene-based polymer; and polymerizing the small-size conjugated diene-based polymer, the large-size conjugated diene-based polymer, an aromatic vinyl-based monomer and a vinyl cyan-based monomer to prepare a graft copolymer, wherein a weight ratio of the small-size conjugated diene-based polymer and the large-size conjugated diene-based polymer is 10:90 to 40:60 in preparing the graft copolymer.
First claim
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The invention claimed is: 1. A method for preparing a graft copolymer, the method comprising: polymerizing a conjugated diene-based monomer to prepare a small-size conjugated diene-based polymer; enlarging the small-size conjugated diene-based polymer to prepare a large-size conjugated diene-based polymer; and polymerizing the small-size conjugated diene-based polymer, the large-size conjugated diene-based polymer, an aromatic vinyl-based monomer and a vinyl cyan-based monomer to prepare a graft copolymer with a graft ratio of 45-60%, wherein a weight ratio of the small-size conjugated diene-based polymer and the large-size conjugated diene-based polymer is 10:90 to 40:60 in preparing the graft copolymer, and wherein the gel content of the small-size conjugated diene-based polymer is 80 to 95%. 2. The method for preparing a graft copolymer according to claim 1 , wherein a weight ratio of the small-size conjugated diene-based polymer and the large-size conjugated diene-based polymer is 25:75 to 35:65 in preparing the graft copolymer. 3. The method for preparing a graft copolymer according to claim 1 , wherein an average particle diameter of the small-size conjugated diene-based polymer is 0.05 to 0.15 μm. 4. The method for preparing a graft copolymer according to claim 1 , wherein preparing the large-size conjugated diene-based polymer corresponds to enlargement by adding a coagulant to the small-size conjugated diene-based polymer. 5. The method for preparing a graft copolymer according to claim 4 , wherein the coagulant is one or more selected from the group consisting of phosphoric acid and acetic acid. 6. The method for preparing a graft copolymer according to claim 1 , wherein an average particle diameter of the large-size conjugated diene-based polymer is 0.3 to 0.5 μm. 7. The method for preparing a graft copolymer according to claim 1 , wherein the polymerization is performed by emulsion polymerization. 8. A thermoplastic resin molded article manufactured using a thermoplastic resin composition comprising: the graft copolymer prepared according to claim 1 ; and a copolymer comprising a unit derived from an aromatic vinyl-based monomer and a unit derived from a vinyl cyan-based monomer, wherein a plating adhesion strength is 7 N/m or more. 9. The thermoplastic resin molded article according to claim 8 , wherein the thermoplastic resin molded article has an izod impact strength of 25 kg·cm/cm or more. 10. The method of claim 1 , wherein the shell of the graft copolymer has a molecular weight distribution of 1.8 to 2.7.
Assignees
Inventors
Classifications
Oxidation · CPC title
- C08F279/04Primary
Vinyl aromatic monomers and nitriles as the only monomers · CPC title
Polymer with special particle form or size · CPC title
Emulsion polymerisation · CPC title
Polymerisation using regulators, e.g. chain terminating agents {, e.g. telomerisation} · CPC title
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- What does patent US11214645B2 cover?
- The present invention relates to a method for preparing a graft copolymer including polymerizing a conjugated diene-based monomer to prepare a small-size conjugated diene-based polymer; enlarging the small-size conjugated diene-based polymer to prepare a large-size conjugated diene-based polymer; and polymerizing the small-size conjugated diene-based polymer, the large-size conjugated diene-bas…
- Who is the assignee on this patent?
- Lg Chemical Ltd
- What technology area does this patent fall under?
- Primary CPC classification C08F279/04. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Jan 04 2022 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 4 related publications on this page (citations in our corpus or others sharing the same primary CPC).