Flame-retardant polypropylene resin composition

Claim 2

A flame-retardant polypropylene resin composition which provides a flame retardance in an UL- 94 vertical burning test of V-0 for a material having a wall thickness of 1/32 inch comprising: ______________________________________ (A) a polyethylene resin 5 to 25% by weight (B) polyammonium phosphate or poly- 12 to 25% by weight ammonium phosphate modified by melamine resin (C) a 1,3,5-triazine derivative having at least 5% by weight the structure represented by the general formula (I) ##STR8## wherein X is a morpholino group or a piperidino group, Y is a divalent group of piperazine, and n is an integer of 2 to 50, (D) a polypropylene resin remainder, the total amount of these components (A) to (D) being 100% by weight. ______________________________________

Claim 3

A flame-retardant polypropylene resin composition according to claim 1 wherein said polypropylene resin is one or a mixture of two or more of a crystalline propylene homopolymer, or crystalline copolymers each of which is composed of the propylene main component and at least one olefin selected from the group consisting of ethylene, butene-1, pentene-1, hexene-1, 4-methylpentene-1, heptene-1, octene-1 and decene-1.

Claim 4

A flame-retardant polypropylene resin composition which provides flame retardance in an UL-94 vertical burning test of 5V for a material having a wall thickness of 1/8 inch comprising: __________________________________________________________________________ (A) a polyethylene resin 5 to 30% by weight (B) polyammonium phosphate or polyammonium 12 to 25% by weight phosphate modified by melamine resin (C) a 1,3,5-triazine derivative having the structure at least 5% by weight represented by the general formula (I) ##STR9## (I) wherein X is a morpholino group or a piperidino group, Y is a divalent group of piperazine, and n is an integer of 2 to 50, (E) a thiophosphite selected from compounds at least 0.05% by weight represented by the general formulae (II), (III), (IV) and (V) ##STR10## (II) ##STR11## (III) ##STR12## (IV) ##STR13## (V) wherein R.sub.1 is an alkyl group having 6 or more carbon atoms, a cycloalkyl group or an aryl group; R.sub.2 is SR.sub.2 ' or R.sub.2 '; R.sub.3 is SR.sub.3 ' or R.sub.3 '; R.sub.2 ' and R.sub.3 ' are identical or different and each of them is an alkyl group, a cycloalkyl group or and aryl group; X is (CH.sub.2).sub.n, (CH.sub.2).sub.nO(CH.sub.2).sub.m or ##STR14## wherein n, m and l are identical or different and they are integers of 2 to 6, (F) a crosslinking agent at least 1% by weight (D) a polypropylene resin remainder, __________________________________________________________________________ the total amount of these components (A) to (F) being 100% by weight.

Claim 5

A flame-retardant polypropylene resin composition which provides flame retardance in an UL-94 vertical burning test of 5V for a material having a wall thickness of 1/8 inch comprising: __________________________________________________________________________ (A) a polyethylene resin 5 to 30% by weight (B) polyammonium phosphate or polyammonium 12 to 25% by weight phosphate modified by melamine resin (C) a 1,3,5-triazine derivative having the structure at least 5% by weight represented by the general formula (I) ##STR9## (I) wherein X is a morpholino group or a piperidino group, Y is a divalent group of piperazine, and n is an integer of 2 to 50, (E) a thiophosphite selected from compounds at least 0.05% by weight represented by the general formulae (II), (III), (IV) and (V) ##STR10## (II) ##STR11## (III) ##STR12## (IV) ##STR13## (V) wherein R.sub.1 is an alkyl group having 6 or more carbon atoms, a cycloalkyl group or an aryl group; R.sub.2 is SR.sub.2 ' or R.sub.2 '; R.sub.3 is SR.sub.3 ' or R.sub.3 '; R.sub.2 ' and R.sub.3 ' are identical or different and each of them is an alkyl group, a cycloalkyl group or and aryl group; X is (CH.sub.2).sub.n, (CH.sub.2).sub.nO(CH.sub.2).sub.m or ##STR14## wherein n, m and l are identical or different and they are integers of 2 to 6, (F) a crosslinking agent at least 1% by weight (D) a polypropylene resin remainder, __________________________________________________________________________ the total amount of these components (A) to (F) being 100% by weight.

Claim 6

A flame-retardant polypropylene resin composition according to claim 3 comprising the above-mentioned components (A), (B), (C), (D), (E) and (F), and additionally (G) an olefinic synthetic rubber or elastomer 5 to 30% by weight the amount of said polypropylene resin being partially replaced with the amount of said component (G).

Claim 7

A flame-retardant polypropylene resin composition according to claim 3 wherein said polypropylene resin is one or a mixture of two or more of a crystalline propylene homopolymer, or crystalline copolymers each of which is composed of 70% by weight or more of propylene and at least one selected from the group consisting of ethylene, butene-1, pentene-1, hexene-1, 4-methylpentene-1, heptene-1, octene-1 and decene-1.

Claim 8

A flame-retardant polypropylene resin composition according to claim 4 wherein said polypropylene resin is one or a mixture of two or more of a crystalline propylene homopolymer, or crystalline copolymers each of which is composed of 70% by weight or more of propylene and at least one selected from the group consisting of ethylene, butene-1, pentene-1, hexene-1, 4-methylpentene-1, heptene-1, octene-1 and decene-1.

Claim 9

A flame-retardant polypropylene composition according to claim 1 wherein said 1,3,5-triazine derivative is present in an amount of not more than 10% by weight.

Claim 10

A flame-retardant polypropylene composition according to claim 3 wherein said 1,3,5-triazine derivative is present in an amount of not more than 10% by weight.

Claim 11

A flame-retardant polypropylene composition according to claim 4 wherein said 1,3,5-triazine derivative is present in an amount of not more than 10% by weight.

Claim 12

A flame-retardant polypropylene composition according to claim 1 wherein said 1,3,5 triazine derivative is an oligomer or a polymer of 2-piperazinylene -4-morpholino-1,3,5,-triazine.

Claim 13

A flame-retardant polypropylene composition according to claim 3 wherein said 1,3,5, triazine derivative is an oligomer or a polymer of 2-piperazinylene -4-morpholino-1,3,5,-triazine.

Claim 14

A flame-retardant polypropylene composition according to claim 4 wherein said 1,3,5, triazine derivative is an oligomer or a polymer of 2-piperazinylene -4-morpholino-1,3,5,-triazine.

Claim 15

A flame-retardant polypropylene composition according to claim 3 wherein said crosslinking agent is a polyfunctional monomer, an oximenitroso compound or a maleimide compound.

Claim 16

A flame-retardant polypropylene composition according to claim 4 wherein said crosslinking agent is a polyfunctional monomer, an oximenitroso compound or a maleimide compound.

Claim 17

A flame-retardant polypropylene composition according to claim 3 wherein said crosslinking agent is present in an amount of not more than 15% by weight.

Claim 18

A flame-retardant polypropylene composition according to claim 4 wherein said crosslinking agent is present in an amount of not more than 15% by weight.

Claim 19

A flame-retardant polypropylene composition according to claim 3 wherein said thiophosphate is present in an amount of not more than 5% by weight.

Claim 20

A flame-retardant polypropylene composition according to claim 4 wherein said thiophosphate is present in an amount of not more than 5% by weight.