Graft copolymer, crosslinked particles, graft crosslinked particles, rubbery polymer, and thermoplastic resin composition using same

Inactive Publication Date: 2018-11-01
TECHNO UMG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent text describes a new type of polymer that can be added to thermoplastic resin to make it more durable and resistant to damage. This polymer helps improve the impact resistance, weather resistance, and color developability of the resulting resin composition. The addition of this polymer also improves the flowability and impact resistance of the resin without affecting its color developability. Overall, this patent provides a way to create a thermoplastic resin with improved properties that can be used for a variety of applications.

Problems solved by technology

However, ASA resins may disadvantageously result in poor appearance due to, for example, a reduction in color developability of a colored molded article or may provide low impact resistance.
The thermoplastic resin composition described above is insufficient in any of impact resistance, weather resistance, color developability, and molded appearance and cannot sufficiently meet the recent strong need.
To improve impact resistance, a graft copolymer obtained by seeded polymerization using a rubber having a uniform particle size is proposed, but it is difficult to prepare rubber particles of 200 nm or more, and the impact-resistance-improving effect is not sufficient (PTL 10).

Method used

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  • Graft copolymer, crosslinked particles, graft crosslinked particles, rubbery polymer, and thermoplastic resin composition using same
  • Graft copolymer, crosslinked particles, graft crosslinked particles, rubbery polymer, and thermoplastic resin composition using same
  • Graft copolymer, crosslinked particles, graft crosslinked particles, rubbery polymer, and thermoplastic resin composition using same

Examples

Experimental program
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Effect test

embodiment of first invention

[Graft Copolymer (C)]

[0098]A graft copolymer (C) of the first invention is obtained by graft-polymerizing one or two or more monomers (B) selected from (meth)acrylic acid esters, aromatic vinyls, vinyl cyanides, N-substituted maleimides, and maleic acid onto a composite rubber-like polymer (A) (hereinafter also referred to as “the composite rubber-like polymer (A) of the first invention”) obtained by miniemulsifying a mixture (Ac) containing a polyorganosiloxane (Aa) and an acrylic acid ester (Ab) in water solvent and then polymerizing the polyorganosiloxane (Aa) and the acrylic acid ester (Ab) in the miniemulsion.

[0099]By polymerizing the mixture (Ac) of the polyorganosiloxane (Aa) and the acrylic acid ester (Ab) after being miniemulsified, the composition of each of the resulting composite rubber-like polymer (A) particles tends to be uniform. A thermoplastic resin composition obtained by incorporating the graft copolymer (C) produced using the composite rubber-like polymer (A) ha...

embodiment of second invention

[0179]Hereinafter, “abrasion resistance” means resistance to damage (abrasion, wear) that can occur when a surface of a molded article is rubbed with a soft material such as cotton work gloves, gauze, or a cloth.

[0180]“Residue” refers to a structural portion that is derived from a compound used to produce a polymer (crosslinked particles (A-I) in the second invention) and incorporated into the polymer. For example, a residue X described below corresponds to the rest of a polyalkylene glycol, a polyester diol, a polycarbonate diol, or a polymer of one or more thereof from each of the two hydroxyl groups of which one hydrogen atom is removed.

[0181]In the second invention, number average molecular weights (Mn) of the crosslinked particles (A-I) and diols incorporated as divalent residues X are values measured using gel permeation chromatography (GPC) relative to polystyrene standards.

[0182]The same applies to the third invention described below.

[0183][Crosslinked Particles (A-I)]

[0184]...

embodiment of third invention

[0248]In the third invention, “abrasion resistance” and “residue” each have the same meaning as in the second invention. Number average molecular weights (Mn) of crosslinked particles (A-II) and diols incorporated as divalent residues X are values measured using gel permeation chromatography (GPC) relative to polystyrene standards.

[0249][Crosslinked Particles (A-II)]

[0250]The crosslinked particles (A-II) of the third invention are obtained by polymerizing a monomer mixture (i-II) containing a di(meth)acrylic acid ester (a) represented by the following formula (1) and having a number average molecular weight of 800 to 9,000 and a mono(meth)acrylic acid ester (d). The content of the di(meth)acrylic acid ester (a) in 100% by mass of the monomer mixture (i-II) is 20% to 80% by mass. Therefore, the crosslinked particles (A-II) of the third invention are constituted by a structural unit derived from the di(meth)acrylic acid ester (a), a structural unit derived from the mono(meth)acrylic a...

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Abstract

Provided is a graft copolymer that has an excellent impact-resistance-imparting effect and that can provide a thermoplastic resin composition excellent in weather resistance and color developability. A graft copolymer (C) obtained by graft-polymerizing one or two or more monomers (B), which are selected from (meth)acrylic acid esters, aromatic vinyls, vinyl cyanides, N-substituted maleimides, and maleic acid, onto a composite rubber-like polymer (A), which is obtained by polymerizing a mixture (Ac) containing a polyorganosiloxane (Aa) and an acrylic acid ester (Ab) after forming a miniemulsion in water solvent. A thermoplastic resin composition that contains the graft copolymer (C) and a thermoplastic resin (D).

Description

TECHNICAL FIELD[0001]The present invention relates to first to fourth inventions below.[0002]The first invention relates to a graft polymer that has an excellent impact-resistance-imparting effect and that can provide a thermoplastic resin composition excellent in weather resistance and color developability, a production method thereof, a thermoplastic resin composition including the graft copolymer, and a molded article thereof.[0003]The second invention relates to crosslinked particles and graft crosslinked particles that, as modifiers of a thermoplastic resin, can improve the flowability, impact resistance, and abrasion resistance of the resin without impairing its color developability and mold shrinkage rate, a thermoplastic resin composition including the crosslinked particles and / or the graft crosslinked particles, and a molded article thereof.[0004]The third invention relates to crosslinked particles and graft crosslinked particles that, as modifiers of a thermoplastic resin,...

Claims

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Application Information

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IPC IPC(8): C08L83/10C08G81/02C08J3/07C08J3/24C08K5/00
CPCC08L83/10C08G81/024C08J3/07C08J3/24C08K5/0025C08L2312/00C08F220/18C08F2/26C08F265/04C08L25/12C08F283/12C08F285/00C08L33/12C08F290/062C08F290/061C08F220/14C08F212/10C08L51/003C08F212/08C08F220/44C08L51/085C08F222/40C08F20/20C08F2/22C08F2/44C08L101/00C08L51/08C08F220/1804C08F279/00C08F291/02C08L51/02C08L51/04C08L51/06C08F265/06C08L69/00C08F257/02C08F2/56C08L55/02C08F279/02C08F2/24C08F220/40
Inventor IWANAGA, TAKASHINAITO, YOSHITAKAATSUTA, HIROYUKIKAMATA, ICHIROMATSUYAMA, HIRONORIFUKAMACHI, YUUSUKE
Owner TECHNO UMG CO LTD
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