Supercharge Your Innovation With Domain-Expert AI Agents!

Process for the production of recycled polycarbonate as raw material for flame-retardant resin compositions and polycarbonate-base flame-retardant resin compositions

A technology of polycarbonate resin and resin composition, which is applied to the manufacture of recycled polycarbonate raw materials for flame-retardant resin compositions and the field of polycarbonate-based flame-retardant resin compositions, and can solve the problem of unspecified sorting Problems such as out-of-process, increased environmental load, energy consumption, etc., to achieve the effect of low cost, small environmental load, and reliable raw materials

Inactive Publication Date: 2009-05-27
IDEMITSU KOSAN CO LTD
View PDF3 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Also, many technical proposals have been proposed for a recycling system for supplying recycled plastics capable of imparting stable quality to recycled products (for example, refer to Patent Documents 3 and 4), but all of them have a process of sorting and recycling, crushing, sorting and recycling. The process of discarding discs and the process of taking out only PC resin sheets from pulverized PC resin sheets, especially Patent Document 3 is characterized by a process for ensuring its quality, although these processes are not limited to plastic products, but can be easily obtained from It is sorted out from the general recycling system such as waste paper and empty cans that existed before, and Patent Documents 3 and 4 do not specifically disclose the sorting method
[0006] Of course, it is also advocated to decompose PC resin into monomers such as 2,2-bis(4-hydroxyphenyl)propane [bisphenol A] in a supercritical state, but it is necessary to polymerize such monomers into PC resin again. More cost, consumes energy and increases environmental load

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] About 100 kg of disk-shaped optical discs were loaded into a container. The optical discs were recovered from the optical disc manufacturing apparatus and were out-of-standard optical discs on which aluminum was laminated as a heterogeneous layer on a polycarbonate substrate. In order to remove the polystyrene dummy substrate from this optical disk, 265 polystyrene dummy substrates in which rainbow colors were seen were removed by observing the double refraction of the substrate with a polarizing plate.

[0072] Next, by using the substrate portion of the disc-shaped optical disc with 1H-NMR analysis was carried out to measure the dihydric phenol monomer composition and hydroxyl terminal fraction of the polycarbonate main chain constituting the substrate.

[0073] As a result of measurement, the OH end fraction of the recovered optical disc was 5.0 mol%, and the monomer composition was 94.5 mol% of bisphenol A and 5.5 mol% of PTBP. From this result, it was confirmed th...

Embodiment 2

[0079] In 80 parts by mass of recovered PClB obtained in Example 1, 10 parts by mass of ABS resin (manufactured by Japan A&L Company, AT-05), 10 parts by mass of talc (manufactured by Fuji Talc Industry Co., Ltd., PT-A25), and 0.3 parts by mass of polytetrafluoroethylene (PTFE: manufactured by Asahi Chlorine Polymers Co., Ltd., CD076), 0.1 parts by mass of an organometallic chlorine compound (manufactured by Dainippon Ink Chemical Industry Co., Ltd., Megafac F-114), and 0.1 parts by mass of stabilized Chemical agent (manufactured by Ciba Specialty Chemicals, Irgfos168), after kneading, a predetermined number of 3.0mm×13mm×127mm rods (rod 1A) and 1.5mm×13mm×127mm rods (rod 1B) were produced by injection molding.

[0080] As a result of flame retardancy evaluation, the critical oxygen index (measured with rod 1A) was 36, and the flame retardancy test of UL94 (measured with rod 1B) was V-0.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
limiting oxygen indexaaaaaaaaaa
composition ratioaaaaaaaaaa
composition ratioaaaaaaaaaa
Login to View More

Abstract

A process for producing recycled polycarbonate (PC) as raw material for flame-retardant resin compositions from waste and / or recovered optical discs whose substrates are made of PC resin which comprises the step (a) of judging whether the PC resin which the substrate of a waste or recovered optical disc is made of is one prepared by using only 2,2-bis(4-hydroxyl- phenyl)propane as the raw material dihydric phenol or not and the step (b) of collecting waste and / or recovered optical discs wherein the PC resins of the substrates are judged to be ones prepared by using only 2,2-bis(4-hydroxyphenyl)propane as the raw material dihydric phenol and removing impurities from the discs by chemical treatment. According to the process, used optical discs or optical discs rejected in the production step thereof which contain PC resin substrates can be treated at a low cost with a small environmental load and recycled as raw material for PC-base flame retardant resin compositions.

Description

technical field [0001] The present invention relates to a method for producing regenerated polycarbonate raw materials for flame-retardant resin compositions and polycarbonate-based flame-retardant resin compositions. A method of recycling a used optical disc or a discarded optical disc as a defective product in the manufacturing process as a raw material of a flame-retardant resin composition, and polycarbonate using the recycled polycarbonate raw material obtained by this method An ester-based flame-retardant resin composition. Background technique [0002] Polycarbonate resin (hereinafter, sometimes referred to as PC resin) is excellent in mechanical strength (especially impact resistance), electrical properties, transparency, etc., and is widely used as engineering plastics in the fields of OA equipment, electrical and electronic equipment, automobiles, and construction. are widely used in various fields. Among various thermoplastic resins, the polycarbonate resin has ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B29B17/00B29B17/04C08G64/40C08J11/06C08L69/00G11B7/253G11B7/26
CPCC08J11/06B29L2017/005C08J2369/00B29B17/02B29B2017/0282B29B2017/0279B29B2017/0203B29K2069/00G11B7/26B29B17/00B29B2017/0296G11B7/2534Y02W30/62Y10T428/31507Y10T428/31504
Inventor 矶崎敏夫
Owner IDEMITSU KOSAN CO LTD
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com