Unlock instant, AI-driven research and patent intelligence for your innovation.

Expandable styrenic resin particles, method for producing same, and expanded particle molded body

A technology of styrene-based resin and polystyrene resin, which is applied in the field of foamable styrene-based resin particles and its manufacturing, can solve the problems of lower heat-resistant temperature and limited application range, and achieve excellent heat resistance and excellent insulation Heat resistance and heat resistance, the effect of excellent foam moldability

Active Publication Date: 2017-08-25
JSP CORP
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the heat-resistant temperature of such a polystyrene foam is lowered to 70 to 80°C, its range of applications will be limited from the viewpoint of heat resistance.

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Expandable styrenic resin particles, method for producing same, and expanded particle molded body
  • Expandable styrenic resin particles, method for producing same, and expanded particle molded body
  • Expandable styrenic resin particles, method for producing same, and expanded particle molded body

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0099] (1) Production of granules

[0100] Using a Φ30mm single-screw extruder, at a temperature of 210 to 230°C, 87 parts by mass of styrene-methacrylic acid copolymer (manufactured by PS Japan Co., Ltd., G9001: glass transition temperature 121°C), 13 parts by mass Graphite masterbatches (average particle size of graphite powder: about 15 μm, graphite concentration: 40% by mass, matrix resin (polystyrene): balance) were melted and kneaded. Then, the molten resin was extruded in a strand form from an extrusion die having a hole diameter of 1.4 mm. The extrudate was directly introduced into a water tank for cooling, then cut and made into small cylindrical pellets (seed pellets) of about 0.8 mg / pc. In this way, seed particles are obtained.

[0101] (2) Production of expandable resin particles

[0102] In an autoclave with a stirring device and an inner volume of 3 L, add 788 g of deionized water, 4.6 g of sodium pyrophosphate, and 11.4 g of magnesium nitrate, and synthesize ...

Embodiment 2

[0111] This example is an example of manufacturing expanded resin particles, pre-expanded particles, and expanded particle molded bodies by changing the proportion of seed particles and styrene in Example 1, and further adding a flame retardant.

[0112] Specifically, first, using a Φ30mm single-screw extruder, at a temperature of 210-230°C, 78 parts by mass of styrene-methacrylic acid copolymer, 13 parts by mass of graphite masterbatch and 9 parts by mass of bromine-based Flame retardant masterbatch melt mixing. Using the same substance as in Example 1 as styrene-methacrylic acid copolymer and graphite masterbatch, using 2,2-bis[4'-(2",3"-dibromo-2 with a composition of 23% by mass. "-methylpropoxy)-3',5'-dibromophenyl]propane, 15% by mass of 2,2-bis[4'-(2",3"-dibromopropoxy)-3 ', 5'-dibromophenyl]propane and the flame retardant masterbatches whose balance is matrix resin (polystyrene) are used as brominated flame retardant masterbatches. Then, as in Example 1, the molten re...

Embodiment 3

[0116] This example is an example of manufacturing expandable resin particles, pre-expanded particles, and expanded particle molded bodies by further changing the proportion of seed particles and styrene in Example 1, and adding a flame retardant.

[0117] Specifically, first, using a Φ30mm single-screw extruder, at a temperature of 210-230°C, 74 parts by mass of styrene-methacrylic acid copolymer, 15 parts by mass of graphite masterbatch and 11 parts by mass of bromine-based Flame retardant masterbatch melt mixing. Use the same material as in Example 1 as the styrene-methacrylic acid copolymer and the graphite master batch, and use the same material as in Example 2 as the brominated flame retardant master batch. Next, in the same manner as in Example 1, the molten resin was extruded in the form of a strand, cooled, and then cut to produce cylindrical seed pellets.

[0118] Next, expandable resin particles are prepared using such particles. The manufacturing process of the e...

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
glass transition temperatureaaaaaaaaaa
diameteraaaaaaaaaa
particle sizeaaaaaaaaaa
Login to View More

Abstract

The present invention can obtain foamed particle moldings excellent in heat resistance and heat insulation, and also provides expandable polystyrene resin particles excellent in foamability, a method for producing the same, and expanded styrene resin particles Shaped body. The present invention relates to expandable styrene resin particles containing graphite and a foaming agent, a method for producing the same, and foamable styrene resin particles obtained by heating and fusing the obtained pre-expanded particles in a mold Foam molding. The matrix resin of expandable styrene-based resin particles is obtained by impregnating and polymerizing styrene into seed particles mainly composed of styrene-(meth)acrylic acid copolymer. Styrene-(meth)acrylic acid copolymer Composite resin of acrylic copolymer and polystyrene resin. The mass ratio of the above-mentioned styrene-(meth)acrylic acid copolymer to the above-mentioned polystyrene resin is 20:80-80:20. Graphite content is 0.1-6 mass parts with respect to 100 mass parts of matrix resins.

Description

technical field [0001] The present invention relates to a kind of styrene-(meth)acrylic acid copolymer and polystyrene resin as base resin, and aliphatic hydrocarbon as foaming agent foamable styrene-based resin particles and its production method, also relates to a A styrene resin foamed particle molded body obtained by using expandable styrene resin particles. Background technique [0002] Plastic foams such as polystyrene foam, for example at 25kg / m 3 When the density is lower than below, the thermal conductivity rises sharply, and the thermal insulation performance decreases. This is because the thickness of the cell film of the foam decreases along with the decrease in density, and the influence of radiation heat transfer increases. [0003] Therefore, polystyrene foams containing fillers such as graphite and metal powder having an infrared shielding function have been developed in order to prevent the decrease in thermal insulation performance due to densification (s...

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 Patents(China)
IPC IPC(8): C08L25/14C08L25/06C08K3/04C08F112/08C08F2/44C08J9/18C08J9/20
Inventor 冈村和树坂本智弥原口健二
Owner JSP CORP
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