Process for producing phenoxyphosphazene compound, flame- retardant resin composition, and flame-retardant resin molding

a technology of phenoxyphosphazene and resin, which is applied in the direction of organic chemistry, chemistry apparatus and processes, group 5/15 element organic compounds, etc., can solve the problems of discoloration of synthetic resins, deterioration of heat resistance, and serious drawbacks of phenoxyphosphazene compounds, so as to reduce mechanical characteristics, reduce molecular weight, and change the hue
US20030040643A1Inactive Publication Date: 2003-02-27OTSUKA CHEM CO LTD
0 Cites 35 Cited by

Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
OTSUKA CHEM CO LTD
Publication Date
2003-02-27
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The phenoxyphosphazene compound of the present invention is prepared by treating a phenoxyphosphazene compound with (a) at least one adsorbent selected from activated carbon, silica gel, activated alumina, activated clay, synthetic zeolite and macromolecular adsorbents, (b) at least one reagent selected from metal hydrides, hydrazine, hypochlorites, thiosulfates, dialkyl sulfuric acids, ortho esters, diazoalkanes, lactones, alkanesultones, epoxy compounds and hydrogen peroxide or (c) both the adsorbent and reagent. Incorporation of the phenoxyphosphazene compound prepared by the process of the invention into a synthetic resin achives the following advantages: the synthetic resin can be prevented from discoloration; when the resultant resin composition is stored for a long time, the properties of the synthetic resin, such as heat resistance, weatherability, resistance to discoloration and chemical resistance are not deteriorated; and the resin composition gives a resin composition molded article excellent in properties such as flame retardancy, thermal stability, and moldability.
Need to check novelty before this filing date? Find Prior Art

Description

[0001] The present invention relates to a process for the preparation of phenoxyphosphazene compounds, flame-retardant resin compositions and flame-retardant resin molded articles.

[0002] Phenoxyphosphazene compounds are the oligomers or polymers which are prepared by reacting a dichlorophosphazene compound with an alkali metal salt of a phenol compound. The use of these compounds as additives, modifiers, etc., for synthetic resins has been heretofore studied.

[0003] Phenoxyphosphazene compounds can impart high flame retardancy, thermal stability, molding processability and other properties to synthetic resins. However, phenoxyphosphazene compounds have a serious drawback: they discolor synthetic resins when added thereto.

[0004] In addition, the addition of a phenoxyphosphazene compound to a synthetic resin may deteriorate the heat resistance, weathering resistance, discoloration resistance, chemical resistance and other properties of the synthetic resin in long-term storage, although...

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