Reactive flame retardant and flame-retardant resin processed article
View Patent ↗Disclosed is a reactive flame retardant which provides a resin with excellent flame retardance even when it is added in a small amount while being prevented from bleedout. Also disclosed is a flame-retardant resin processed article obtained by using such a reactive flame retardant. An organophosphorus compound represented by the general formula (I) below, wherein at least one or more of X 1 -X 3 represent a group containing phosphorus and having a terminal unsaturated group, is used as a reactive flame retardant which is reactive with resins. A flame-retardant resin processed article can be obtained by solidifying the resin composition containing the organophosphorus compound and then reacting it through heating or application of radiation.
1. A reactive flame retardant, comprising an organophosphorus compound represented by the following general formula (I) or (II), the organophosphorus compound having a terminal unsaturated group:
where X 1 to X 3 each independently represent —OH or a group represented by the following formula (A), X 4 represents a single bond or a group represented by the following formula (B), and one or more of X 1 to X 3 each represent a group represented by the following formula (A) and containing CH 2 ═CH—CH 2 — at a terminal of the group;
where R 1 represents CH 2 ═CH—CH 2 —, an aryl group having 12 or less carbon atoms, or an aralkyl group having 12 or less carbon atoms, R 2 and R 3 each independently represent a hydrogen atom, CH 2 ═CH—CH 2 —, an aryl group having 12 or less carbon atoms, or an aralkyl group having 12 or less carbon atoms, and Y represents a single bond, —NH—, or —O—;
where R 4 to R 9 each represent a group selected from phenyl, benzyl, α-naphthyl, β-naphthyl, p-biphenyl, phenoxy, benzyloxy, α-naphthoxy, β-naphthoxy, p-biphenyloxy, (CH 2 ═CH—CH 2 ) 2 N—, CH 2 ═CH—CH 2 NH—, CH 2 ═CH—CH 2 O—, and CH 2 ═CH—CH 2 — groups, R 10 represents H or CH 2 ═CH—CH 2 —, at least one of R 4 to R 10 represents a group containing CH 2 ═CH—CH 2 —, at a terminal of the group, and R 4 to R 9 may be identical to or different from one another.
2. A flame-retardant resin processed article obtained by molding or film-coating a resin composition which contains the reactive flame retardant according to claim 1 and a resin and then reacting the resin with the reactive flame retardant by heating or irradiation with a radiation, the flame-retardant resin processed article comprising 1 to 20 mass % of the reactive flame retardant with respect to an entirety of the flame-retardant resin processed article.
3. The flame-retardant resin processed article according to claim 2 , wherein the resin composition contains two or more kinds of the reactive flame retardants at least one kind of which is multifunctional.
4. The flame-retardant resin processed article according to claim 2 , wherein the resin composition further contains, other than the reactive flame retardant, a flame retardant being a cyclic nitrogen-containing compound having at least one unsaturated group at a terminal of the compound.
5. The flame-retardant resin processed article according to claim 2 , wherein the resin composition further contains an addition type flame retardant having no reactivity.
6. The flame-retardant resin processed article according to claim 2 , wherein the resin composition further contains a crosslinking agent which is a multifunctional monomer or oligomer having an unsaturated group at an end of main skeleton thereof.
7. The flame-retardant resin processed article according to claim 2 , further comprising 1 to 45 mass % of an inorganic filler with respect to the entirety of the flame-retardant resin processed article.
8. The flame-retardant resin processed article according to claim 7 , further comprising 1 to 10 mass % of a laminar clay obtained by laminating silicate layers as the inorganic filler with respect to the entirety of the flame-retardant resin processed article.
9. The flame-retardant resin processed article according to claim 2 , further comprising 5 to 50 mass % of reinforced fibers with respect to the entirety of the flame-retardant resin processed article.
10. The flame-retardant resin processed article according to claim 2 , which is obtained by a reaction between the resin and the reactive flame retardant through irradiation with an electron beam or a γ ray at a dose of 10 kGy or more.
11. The flame-retardant resin processed article according to claim 2 , which is obtained by a reaction between the resin and the reactive flame retardant at a temperature higher than a temperature at which the resin composition is molded by 5° C. or higher.
12. The flame-retardant resin processed article according to claim 2 , which comprises one selected from a molded article, a coating film, and a sealing compound.
13. The flame-retardant resin processed article according to claim 2 , which is used as an electrical component or an electronic component.