Resin composition for preparing polyolefin based flame retardant foamed articles and flame retardant foamed articles therefrom

Patent metadata

Field	Value
Publication number	US-10882976-B2
Application number	US-201716333525-A
Country	US
Kind code	B2
Filing date	Sep 19, 2017
Priority date	Sep 19, 2016
Publication date	Jan 5, 2021
Grant date	Jan 5, 2021

Abstract

The present disclosure relates to a resin composition for preparing polyolefin-based foamed articles having flame retardancy and flame retardant foamed articles formed therefrom. The resin composition according to the present disclosure can provide foamed articles having excellent flame retardancy and flame resistance while exhibiting a high fusion ratio and a low shrinkage ratio in the foam molding.

First claim

The invention claimed is:

1. A resin composition for preparing polyolefin-based flame retardant foamed articles, comprising 94 to 97 wt % of a polyolefin resin and 3 to 6 wt % of a flame retardant,
wherein the flame retardant contains a bromine-based flame retardant, a phosphorous-based flame retardant, and a nitrogen-based flame retardant in a weight ratio of 1:0.6 to 30:0.6 to 20,
wherein the bromine-based flame retardant is 1,3,5-triazine-2,4,6-triamine hydrobromide, polybrominated diphenyl ethers, polybrominated biphenyls, tetrabromo bisphenol A, or hexabromocyclododecane; the phosphorous-based flame retardant is ammonium polyphosphate, phosphoric acid, or pentaerythritol phosphate; and the nitrogen-based flame retardant is melamine cyanurate.

2. The resin composition for preparing polyolefin-based flame retardant foamed articles of claim 1 ,
wherein the flame retardant consists of 0.06 to 1.75 wt % of the bromine-based flame retardant, 0.5 to 3.25 wt % of the phosphorous-based flame retardant, and 0.5 to 2.25 wt % of the nitrogen-based flame retardant based on a total weight of the resin composition.

3. The resin composition for preparing polyolefin-based flame retardant foamed articles of claim 1 ,
wherein the polyolefin resin is at least one resin selected from the group consisting of polyethylene, polypropylene, polybutene, polyisobutylene, polymethylpentene, an ethylene-propylene copolymer, an ethylene-butene copolymer, and a propylene-butene copolymer.

4. Polyolefin-based flame retardant foamed articles comprising foam-molded articles of the resin composition according to claim 1 .

5. The polyolefin-based flame retardant foamed articles of claim 4 ,
having an HF-1 rating according to a UL 94 HBF Test, and
satisfying a carbonized distance of 15 cm or less according to Article 7 (Standards and Methods for Flame Resistant Performance Measurement of synthetic resin plates, plywood and the like) of ‘Flame Resistant Performance Standards’ of the Korean Ministry of Public Safety and Security Notification No. 2015-1.

6. The polyolefin-based flame retardant foamed articles of claim 4 ,
wherein the polyolefin-based flame retardant foamed articles are obtained by fusion-molding the foam-molded articles, and
when an arbitrary cut surface of the foamed articles is observed, an area where the foam-molded articles are fused together represents 50 to 80% of the arbitrary cut surface area.

7. The polyolefin-based flame retardant foamed articles of claim 4 ,
wherein the polyolefin-based flame retardant foamed articles are obtained by fusion-molding the foam-molded articles, and
they have a shrinkage ratio of 2.5% or less, which is determined by comparing dimensions of the foamed articles obtained by drying the foam-molded articles at 50° C. for 6 hours immediately after molding with dimensions of a mold used for the molding.

Assignees

• Lotte Chemical Corp

Inventors

• Kwon Yong Jin
• Lim Sung Hwan
• Eom Se Yeon

Classifications

• C08J9/00 Primary

  Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof (mechanical aspects of shaping of plastics or substances in a plastic state for the production of porous or cellular articles B29C) · CPC title

• C08L23/22

  Copolymers of isobutene; Butyl rubber; Homopolymers or copolymers of other iso-olefins · CPC title

• C08L23/16

  Ethylene-propylene or ethylene-propylene-diene copolymers · CPC title

• C08L23/00

  Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers · CPC title

• C08L23/12

  Polypropene · CPC title