阅读说明：本技术 阻燃性聚丙烯组合物 (Flame retardant polypropylene composition ) 是由 黄挺 W·李 姜朝东 禹蒙蒙 秦晓静 于 2019-09-13 设计创作，主要内容包括：本发明涉及一种阻燃性聚丙烯组合物,其包含(A)基于聚丙烯的聚合物,(B)阻燃剂,(C)选自由滑石和具有式(I)的有机硅颗粒和它们的混合物组成的组的抗起霜粒状材料,其中x为大于或等于1的正数,并且各R独立地为脂族烃基、芳族烃基或不饱和基团。R-xSiO-(2-(x/2))(I)。(The present invention relates to a flame retardant polypropylene composition comprising (a) a polypropylene based polymer, (B) a flame retardant, (C) an anti-blooming particulate material selected from the group consisting of talc and silicone particles having the formula (I) and mixtures thereof, wherein x is a positive number greater than or equal to 1, and each R is independently an aliphatic hydrocarbon group, an aromatic hydrocarbon group, or an unsaturated group. R x SiO 2‑(x/2) (I)。)

1. A flame retardant polypropylene composition comprising:

(A) a polymer based on a polypropylene, the polymer being,

(B) a flame-retardant agent which is a flame-retardant agent,

(C) an anti-blooming particulate material selected from the group consisting of talc and silicone particles having formula (I) and mixtures thereof,

R_xSiO_2-(x/2)(I)

wherein x is a positive number greater than or equal to 1 and each R is independently an aliphatic hydrocarbyl, aromatic hydrocarbyl or unsaturated group, wherein the composition further comprises (D) a synergist, wherein preferably the amount of (D) is from 0.1 to 7.0 wt. -%, preferably from 1.0 to 5.0 wt. -%, relative to the total composition.

2. The composition according to any of the preceding claims, wherein the amount of (C) the anti-blooming particulate material is from 0.5 to 5.0 wt. -%, such as from 0.6 to 3.0 wt. -% or from 0.7 to 2.0 wt. -%, relative to the total composition.

3. The composition of any preceding claim, wherein (C) the anti-blooming particulate material comprises talc having a lamella structure index (LI) of more than 2.90, defined as:

wherein d50(L) is the median particle size d50[ mass percent ] determined by laser diffraction techniques according to ISO 13320-1 and d50(S) is the median particle size d50[ mass percent ] determined by deposition techniques according to ISO 13317-3.

4. The composition of any preceding claim, wherein the anti-blooming particulate material comprises methyl silsesquioxane.

5. The composition of any of the preceding claims, wherein (a) the polypropylene-based polymer is a propylene homopolymer or a propylene random copolymer consisting of at least 70 wt% propylene monomer units and at most 30 wt% alpha-olefin monomer units, based on the propylene random copolymer.

6. The composition according to any of the preceding claims, wherein the amount of (A) the polypropylene-based polymer is from 75 to 95 wt. -%, such as from 80 to 90 wt. -%, relative to the total composition.

7. The composition of any preceding claim, wherein (B) the flame retardant is a halogenated flame retardant, preferably a brominated flame retardant, preferably selected from the group consisting of: bis (2-hydroxyethyl) ether of tetrabromobisphenol A, bis (3-acryloyloxy-2-hydroxypropyl) ether of tetrabromobisphenol A, bis (3-methacryloyloxy-2-hydroxypropyl) ether of tetrabromobisphenol A, bis (3-hydroxypropyl) ether of tetrabromobisphenol A, bis (2, 3-dibromopropyl) ether of tetrabromobisphenol A, diallyl ether of tetrabromobisphenol A, and bis (vinylbenzyl) ether of tetrabromobisphenol A; brominated polycarbonate, tetrabromobisphenol a polycarbonate oligomer, brominated polyacrylate such as poly benzyl pentabromoacrylate; brominated polystyrenes such as polydibromostyrene and polytribromostyrene; brominated BPA polyepoxide, tetrabromocyclooctane; dibromoethyldibromocyclohexane, such as 1, 2-dibromo-4- (1, 2-dibromoethyl) -cyclohexane; ethylene-bistetrabromophthalimide; hexabromocyclododecane; tetrabromophthalic anhydride; brominated diphenyl ethers such as decabromodiphenyl ether; poly (2, 6-dibromophenylene ether); tris (2,4, 6-tribromophenoxy-1, 3, 5-triazine; tris (tribromoneopentyl) phosphate; and decabromodiphenylethane.

8. Composition according to any one of the preceding claims, in which the amount of component (B) is from 1 to 25% by weight, preferably from 3 to 20% by weight, more preferably from 5 to 15% by weight, relative to the total composition.

9. The composition of any of the preceding claims, wherein components (A), (B), and (C) total at least 85 wt.%, at least 90 wt.%, or at least 95 wt.% of the total composition.

10. According to any one of the preceding claimsThe composition of, wherein (gloss)₀Degree of gloss₂₄) Gloss degree₀Is at most 0.30, more preferably at most 0.25, wherein

Degree of gloss₀Is the gloss of the composition measured at 60 ° after 0 hours according to ASTM D2457-13, and

degree of gloss₂₄Is the gloss of the composition measured at 60 ° after 24 hours according to ASTM D2457-13.

11. The composition of any of the preceding claims, wherein the composition has a gloss (gloss) measured at 60 ° after aging for 24 hours at a temperature of 50 ℃ according to ASTM D2457-13 of more than 60₂₄)。

12. The composition of any of the preceding claims, wherein the composition has a flame retardancy of V0 at a sample thickness of 1.5mm according to UL94 test standard, wherein the sample is aged at 23 ℃ ± 2 ℃ and 50% ± 10% relative humidity for 48 hours prior to testing; and/or the composition has a flame retardancy of V0 at a sample thickness of 1.5mm according to the UL94 test standard, wherein the sample is aged at 70 ℃ ± 2 ℃ for 168 hours ± 2 hours and cooled in a dryer for at least 48 hours prior to testing.

13. A process for preparing a composition according to any preceding claim, the process comprising melt mixing (a), (B) and (C) and optional components.

14. An article comprising the composition of any of claims 1-12, preferably wherein the article is a toilet component.

Examples

Materials as shown in table 1 were used in the experiments.

TABLE 1

The components of the composition as shown in table 2 were melt-mixed by a twin-screw extruder to obtain pellets. Various properties were measured.

Gloss was measured at 60 ℃ after aging in an oven at 50 ℃ for 0 hour, 4.8 hours and 24 hours, using a color chip of 90X 50X 3.20mm according to ASTM D2457-13.

Flame retardancy was measured according to UL94 test standards at a sample thickness of 1.5mm, where the sample was aged for 48 hours at 23 ℃. + -. 2 ℃ and 50%. + -. 10% relative humidity prior to testing. Flame retardancy was also measured according to UL94 test standard at a sample thickness of 1.5mm, where the sample was aged at 70 ℃. + -. 2 ℃ for 168 hours. + -. 2 hours and cooled in a desiccator for at least 48 hours prior to testing.

Flexural modulus and flexural strength were measured according to ISO 178:2010 (parallel, test geometry: 80X 10X 4mm, 2.0 mm/min).

Izod impact strength was measured according to ISO 180:2000 at-20 ℃ and 23 ℃ (test geometry: 80X 10X 4 mm).

Density is measured according to 1183-1: 2012.

The melt flow rate was measured according to ISO1133-1:2011(2.16kg/230 ℃).

TABLE 2 (amounts are in parts by weight)

From a comparison of CE1 versus CE3, it can be understood that the presence of the flame retardant results in a significant reduction in gloss after one day.

From a comparison of CE3 versus Ex4-Ex9, it can be appreciated that the reduction in gloss is reduced by the addition of the anti-blooming particulate material.

From a comparison of CE3 versus Ex4 and Ex5, it can be appreciated that the use of silicon results in higher impact strength, and the use of talc results in higher flexural properties.