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Graft copolymer and resin compositions containing the same

A technology of graft copolymers and silane compounds, which is applied in the field of resin compositions, can solve the problems of lack of flame retardancy and achieve excellent flame retardancy and impact resistance

Inactive Publication Date: 2007-04-18
KANEKA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, any flame retardant resin composition cannot obtain a sufficient level of anti-dripping agent because it is used in the molded products of the high-wall and thin field on the market, or due to the restriction of the use of halogens, or the reduction of the cost of raw materials. Flame retardancy, so it is expected to greatly improve the flame retardancy

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0063] Although the present invention is specifically described based on examples, the present invention is not limited to these examples. In addition, the measurements and tests in the following examples and comparative examples were performed as follows.

[0064] [grafting efficiency]

[0065] A polyorganosiloxane-containing graft copolymer latex whose ratio was determined to be used as a graft component in the entire polymer was added to about 10 times the amount of methanol and allowed to coagulate. Next, it dried under reduced pressure at 80 degreeC for 12 hours, and obtained the graft copolymer polymer. Accurately weigh 1 g of the graft copolymer polymer, and soak it in acetone for 8 hours, so that the graft polymer not bound to the polyorganosiloxane is dissolved in the acetone. Next, centrifugation was performed at 12000 rpm for 60 minutes to remove acetone-insoluble components by separation to obtain a polymer-containing acetone solution. Next, the same acetone imm...

manufacture example 1

[0075] Add 5 parts by weight to a mixture containing 300 parts by weight of pure water, 0.5 parts by weight of sodium dodecylbenzenesulfonate (SDBS) (solid content), and 98 parts by weight of octamethylcyclotetrasiloxane (D4). For the graft crossing agent in Table 1, use a homomixer to stir at 7000rpm for 5 minutes to prepare the emulsion, and add it to 5 ports equipped with agitator, reflux condenser, nitrogen blowing port, monomer addition port, and thermometer at one time. in the flask.

[0076] Next, the temperature was raised to 80° C. under a nitrogen stream while stirring, and 1 part by weight (solid content) of a 10% aqueous solution of dodecylbenzenesulfonic acid was added. After continuous stirring at 80° C. for 6 hours, it was cooled to 25° C. and left standing for 30 hours to obtain polyorganosiloxane latex.

[0077] Next, 30 parts by weight (solid content) of polyorganosiloxane latex was charged into a 5-necked flask equipped with a stirrer, a reflux condenser, a...

manufacture example 2～8

[0079] 300 parts by weight of pure water and 12 parts by weight of sodium dodecylbenzenesulfonate (SDBS) (solid content) were mixed in a 5-necked flask equipped with a stirrer, a reflux condenser, a nitrogen blowing port, a monomer addition port, and a thermometer. Then, the temperature was raised to 50°C, and when the liquid temperature reached 50°C, nitrogen substitution was performed. Then, 10 parts by weight of butyl acrylate (BA), 3 parts by weight of t-dodecyl mercaptan (tDM), and 0.01 parts by weight of p-oxane hydroperoxide were added. After 30 minutes, ferrous sulfate (FeSO 4 ·7H 2 O) 0.002 parts by weight, 0.005 parts by weight of ethylenediaminetetraacetic acid·2Na salt, and 0.2 parts by weight of sodium formaldehyde sulfoxylate were then polymerized for 1 hour. Then, a liquid mixture of 90 parts by weight of butyl acrylate (BA), 27 parts by weight of tert-dodecyl mercaptan (tDM), and 0.1 part by weight of p-oxane hydroperoxide was continuously added over 3 hours....

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Abstract

The present invention relates to a thermoplastic resin excellent in the effect of improving flame retardance and impact resistance; and compositions containing the resin. Specifically, a polyorganosiloxane -containing graft copolymer obtained by adding 0.1 to 10 parts by weight of a grafting agent (C) to 30 to 94.9 parts by weight of a polyorganosiloxane (B) which is modified with a grafting agent (A) and takes the form of a latex to conduct a reaction, reacting the obtained product with 0 to 10 parts by weight of a mixture (F) containing a polyfunctional monomer having two or more polymerizable unsaturated bonds in the molecule, and then polymerizing 5 to 69.9 parts by weight of a vinyl monomer (G) in the presence of the resulting reaction mixture (with the proviso that the total of the components (B), (C), (F), and (G) is 100 parts by weight), characterized in that the grafting agent (C) is one which can attain a graft efficiency higher than that of the grafting agent (A); and resin compositions containing the graft copolymer.

Description

technical field [0001] The present invention relates to a graft copolymer containing polyorganosiloxane and a resin composition containing the graft copolymer which is excellent in flame retardancy and impact resistance. Background technique [0002] Polycarbonate-based resins are widely used as electric / electronic parts, office (OA) equipment, household goods, or construction materials due to their excellent impact resistance, heat resistance, electrical characteristics, and the like. Polycarbonate-based resins have higher flame retardancy than polystyrene-based resins, but there are also those that require higher flame retardancy, mainly in the fields of electrical and electronic components, office (OA) equipment, etc. field, and seek improvement by adding various flame retardants. As a non-halogen and non-phosphorus flame retardant, it has been proposed to use a polyorganosiloxane compound (also referred to as polysiloxane). Conventionally, as a method of obtaining a fl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/12C08L51/08C08L101/00
CPCC08L51/085C08F283/12C08L51/08C08L101/00
Inventor 桥本友道高木彰
Owner KANEKA CORP
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