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Biodegradable resin compositions and molded objects thereof

A technology of resin composition and biodegradability, which is applied in the field of biodegradable resin composition and its molded body, can solve the problem of not disclosing the processability and heat resistance of biodegradable plastics, and not being able to meet the requirements of biodegradability and resin combination things and other issues

Inactive Publication Date: 2007-11-28
KANEKA CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, neither the resin composition comprising the above-mentioned graft composite rubber and polyester resin nor the thermoplastic resin composition can satisfy the level of biodegradability and physical properties of the resin composition.
[0007] On the other hand, as in Patent Documents 4 and 5, attempts have been made to improve the crystallization properties by adding sorbitol or the like to lactic acid polymers such as polylactic acid, but there is still no disclosure of improving the biological properties of plants as described above. Processability and heat resistance technology of degradable plastics
[0008] In addition, as in Patent Documents 6 and 7, attempts have been made to improve the crystallization characteristics by adding amide compounds or urea compounds to polymers of lactic acid such as polylactic acid, but there is still no disclosure of improving the crystallization properties of the plant-derived Technology for Processability and Heat Resistance of Biodegradable Plastics

Method used

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  • Biodegradable resin compositions and molded objects thereof
  • Biodegradable resin compositions and molded objects thereof
  • Biodegradable resin compositions and molded objects thereof

Examples

Experimental program
Comparison scheme
Effect test

manufacture example 1

[0205] (Manufacture example 1) [Manufacture of polyorganosiloxane latex (S-1)]

[0206] 1 part of tetraethoxysilane, 1.5 parts of γ-methacryloxypropyldimethoxymethylsilane, and 97.5 parts of octamethylcyclotetrasiloxane were mixed to obtain 100 parts of a siloxane mixture. Add 100 parts of the above-mentioned mixed siloxane to 200 parts of distilled water in which 1 part of sodium dodecylbenzenesulfonate and dodecylbenzenesulfonic acid have been dissolved, and pre-stir with a homomixer at 10000 rpm, then use Homogenizer at 300kg / cm 2 emulsification and dispersion under high pressure to obtain organosiloxane latex. Transfer the mixed solution to a separable flask with a condenser and a stirring blade, heat at 90° C. for 5 hours while stirring and mixing, then place it at 20° C. After 48 hours, use aqueous sodium hydroxide solution to the latex The pH was neutralized to 7.5, and the polymerization was terminated to obtain polyorganosiloxane rubber latex S-1. The polymerizatio...

manufacture example 2

[0207] (Manufacture example 2) [Manufacture of polyalkylacrylate latex (R-1)]

[0208] 200 parts of pure water, 1.5 parts of sodium citronellate, 0.4 parts of SFS, 0.01 parts of Disodium ethylenediaminetetraacetic acid (EDTA), 0.0025 parts of ferrous sulfate. While stirring the system, the temperature was raised to 40°C under a nitrogen flow. After reaching 40°C, a solution containing 100 parts of butyl acrylate (BA), 1 part of allyl methacrylate (A1MA), and 0.1 part of hydrogen peroxide was continuously added dropwise for 6 hours. Mixture of cumene oxide (CHP). After completion of the dropwise addition, stirring was continued at 40° C. for 1 hour to complete the polymerization. The polymerization conversion rate was 97%. The obtained latex had a pH of 8.2, a solid content concentration of 32%, an average particle diameter of 80 nm, and a gel content of 99%.

manufacture example 3

[0209] (Manufacture example 3) [manufacture of composite rubber]

[0210] (SR-1)

[0211]Take the above-mentioned polyorganosiloxane rubber latex S-1 with 10 parts of solid content, put it into a separable flask with a stirrer, add 180 parts of distilled water, carry out nitrogen replacement, heat up to 40 ° C, add 65 parts of acrylic acid After the mixed solution of butyl ester, 0.65 part of allyl methacrylate and 0.065 part of CHP was stirred for 30 minutes, the mixed solution was impregnated into the polyorganosiloxane rubber particles. Next, a mixed solution of 0.0025 parts of ferrous sulfate, 0.01 parts of EDTA, 0.3 parts of SFS and 5 parts of distilled water was charged to start free radical polymerization, and then kept at an internal temperature of 70°C for 2 hours to complete the polymerization to obtain a composite rubber latex. A part of this latex was collected, and the average particle diameter of the composite rubber was measured to be 0.22 μm.

[0212] (SR-2) ...

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Abstract

The present invention has its object to provide a resin composition excellent in impact resistance, tensile properties and transparency using a plant-derived biodegradable polymer obtained by positive fixation of carbon dioxide on the earth and, moldings thereof, and, further, provide a resin composition and moldings thereof improved in processability and thermal stability. The present invention relates to a resin composition which comprises (A), an aliphatic polyester type biodegradable polymer and (B) at least one copolymer selected from the group consisting of composite rubber graft copolymers (b1) and core-shell type graft copolymers (b2); or, a resin composition which comprises (A) an aliphatic polyester type biodegradable polymer and (C) at least one compound selected from the group consisting of sorbitol compounds (c1) having a particular chemical structure and urea bond-containing substituted urea compounds (c2).

Description

technical field [0001] The present invention relates to a composition containing a plant-derived biodegradable polymer and a molded article thereof, which are obtained by positively fixing carbon dioxide on the earth, and are expected to contribute to the prevention of global warming. In addition, it relates to a composition and a molded article that are simultaneously excellent in processability, heat resistance, impact resistance, elastic modulus, and the like. Background technique [0002] In the past, although plastics have the characteristics of easy processing and use, on the other hand, they have become disposable items due to difficulty in recycling and hygiene problems. However, with the large-scale use and disposal of plastics, the problem of landfill or incineration has been paid attention to. The shortage of landfills and the impact of non-degradable plastics in the environment have an impact on the ecosystem. Burning Oxygen is produced from time to time, and a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08K7/02C08K5/1575C08L51/04C08K5/21C08L101/16
CPCC08L51/04C08L51/085C08F265/04C08K5/21C08F283/12C08L67/04C08L51/003C08K5/1575
Inventor 桥本芳彦青山泰三中村信雄铃木纪之
Owner KANEKA CORP
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