CN103602056A - Mildewproof and antibacterial polycarbonate composition suitable for outdoor use - Google Patents

Abstract

The invention relates to a mildewproof and antibacterial polycarbonate composition suitable for outdoor use. The composition is characterized by comprising the following components by weight: 85 parts of polycarbonate (PC), 1-20 parts of a toughening agent, 1-10 parts of a flame retardant, 0.1-5 parts of a mildewproof and antibacterial agent, and 0.1-5 parts of an anti-aging agent. Specifically, the mildewproof and antibacterial agent is at least one of a silicone quaternary ammonium salt, bitertanol, dibenzoyl peroxide, alpha-bromobeta-phenylacrolein; and the anti-aging agent is at least one of 4, 4'-thiobis(6-tert-butyl-3-methylphenol), beta-(3, 5-tert-butyl-4-hydroxyphenyl)octadecyl propionate, phosphite triester(2, 4-di-tert-butylphenyl), and bis(2.4-di-tert-butylphenyl) pentaerythritol diphosphite. Compared with the prior art, the mildewproof and antibacterial performance of polycarbonate compositions is enhanced during use in subtropical zones.

Description

A kind of antimildew and antibacterial type polycarbonate composition of applicable outdoor use

Technical field

The antimildew and antibacterial type polycarbonate composition that the present invention relates to a kind of applicable outdoor use, belongs to polymer composite field.

Background technology

Polycarbonate (being called for short PC) is the high molecular polymer that contains carbonate group in molecular chain, it is a kind of line style carbonic acid polyester, carbonic acid group and other group alternative arrangements in molecule, polycarbonate is the amorphous polymer of almost colourless vitreous state, has well optical.Polycarbonate has very high toughness, and socle girder notched Izod impact strength is higher, also has higher heat-drawn wire, but poor fluidity, difficult forming, goods are responsive to breach, easily produce stress cracking, not resistance to solvent.In order to make polycarbonate material be applicable to industrial application, the modes of blend or copolymerization that adopt increase more in the prior art, but contriver finds the existing polycarbonate compositions having strengthened by blend or copolymerization in use for some time, very easy going mouldy, make degraded appearance, structural strength also decreases, in order to address this problem, many producers all adopt and in intermingling material, add antimildew and antibacterial agent, the generation of going mouldy to draw up, but find in application process, while using out of doors, in material, added the polycarbonate blending of antimildew and antibacterial agent or situation that copolymeric material goes mouldy still comparatively serious, the problem further occurring for solving this, there is contriver to propose to add antiaging agent in polycarbonate blending or copolymeric material, to solve weather-proof problem, but further test is found, the situation of going mouldy when having increased ageing-resistant polycarbonate blending or copolymeric material and using is out of doors the performance of non-rule, the in the situation that of antimildew and antibacterial agent kind, be not all antiaging agent and composite effects that all has lifting or obviously promote the antimildew and antibacterial performance of material of antimildew and antibacterial agent, in its antimildew and antibacterial performance of the open air of different zones use, also there is significant otherness simultaneously, in sum, obviously prior art has further improved necessity.

Summary of the invention

The object of the present invention is to provide a kind of antimildew and antibacterial type polycarbonate composition of applicable outdoor use, the antimildew and antibacterial type polycarbonate composition of the outdoor use in a kind of applicable subtropics particularly, the problem existing to overcome prior art.

The antimildew and antibacterial type polycarbonate composition of a kind of applicable outdoor use of the present invention, is characterized in that counting by weight it composed as follows:

The polycarbonate of 85 parts (PC), the toughner of 1～20 part, the fire retardant of 1～10 part, the antimildew and antibacterial agent of 0.1～5 part, the antiaging agent of 0.1～5 part;

Described toughner is selected from least one in POE, ethylene-butylene copolymer, ethylene propylene copolymer and styrene-butadiene-copolymer;

Described antimildew and antibacterial agent is selected from least one in silicone quaternary ammonium salt, Bitertanol, dibenzoyl peroxide, alpha-brominated phenyl cinnamic aldehyde;

Described antiaging agent is selected from 4,4 '-thiobis (the 6-tertiary butyl-3-methylphenol), β-(3, tri-grades of butyl-4-hydroxy phenyls of 5-) at least one in propionic acid octadecanol ester, tris phosphite (2,4-di-tert-butyl-phenyl), two (2.4-di-tert-butyl-phenyl) pentaerythritol diphosphites;

Described fire retardant is selected from least one in triphenylphosphate, Tritolyl Phosphate, dihydroxyphenyl propane bis phosphoric acid diphenyl ester.

The antimildew and antibacterial type polycarbonate composition of this applicable outdoor use of the present invention, can adopt conventional mixing extruding and pelletizing process to produce, the production method of recommending is: each component mixes rear extruding pelletization, obtains cold resisting type antimildew and antibacterial series polycarbonate resin polymkeric substance.In the present embodiment, during mixing, use homogenizer to stir, while extruding, adopt 75# twin screw extruder, rotating speed is 450r/min, and the first district of forcing machine temperature is that 270 ℃， bis-district's temperature are 275 ℃, three district's temperature are that 275 ℃， tetra-district's temperature are that 275 ℃， five district's temperature are 270 ℃.

This case contriver shockingly find, be selected from silicone quaternary ammonium salt, Bitertanol, dibenzoyl peroxide, the antimildew and antibacterial agent of at least one in alpha-brominated phenyl cinnamic aldehyde be selected from 4, 4 '-thiobis (the 6-tertiary butyl-3-methylphenol), β-(3, tri-grades of butyl-4-hydroxy phenyls of 5-) propionic acid octadecanol ester, tris phosphite (2, 4-di-tert-butyl-phenyl), the corresponding ratio of weight and number that the antiaging agent of at least one in two (2.4-di-tert-butyl-phenyl) pentaerythritol diphosphites provides by the present invention is adaptive, when can guarantee that polycarbonate composition of the present invention can be possessed good mechanical performance index, the antimildew and antibacterial performance of simultaneously using under the outdoor condition in temperate zone has obtained larger lifting.One of major reason that polycarbonate easily goes mouldy is polycarbonate facile hydrolysis, and in the not weather-proof aging situation of polycarbonate, hydrolysis situation becomes even more serious, polycarbonate after hydrolysis very easily goes mouldy, merely at polycarbonate, in the mode of blend, add antimildew and antibacterial agent to go mouldy and have certain effect drawing up, but in the comparatively serious situation of hydrolysis, it is very limited that the effect of antimildew and antibacterial agent just becomes, and ageing-resistant principle is that it can absorb the UV-light of 270-380 nanometer, thereby can prevent the aging hydrolysis of polycarbonate, different antiaging agents is different to the ultraviolet sensitivity of different wave length and varying strength, same compound scheme presents different effects under different applied environments for this reason, the present invention adds specific antimildew and antibacterial agent and antiaging agent by the mode with blend simultaneously, finally significantly promoted the antimildew and antibacterial performance that polycarbonate composition of the present invention is used under subtropical environment, in sum, obvious object of the present invention is achieved.

Embodiment

Below in conjunction with specific embodiment and comparative example, the present invention will be further described, but described embodiment and comparative example are only for illustrating the present invention rather than restriction the present invention.

The antimildew and antibacterial type polycarbonate composition of a kind of applicable outdoor use of various embodiments of the present invention and comparative example is counted by weight it and is formed as shown in Table 1, and wherein embodiment 3 is comparative example:

Table one:

Component	Embodiment 1	Embodiment 2	Embodiment 3	Embodiment 4
					Polycarbonate (PC)	85 parts	85 parts	85 parts	85 parts
Toughner:	?	?	?	?
					POE	15 parts	15 parts	15 parts	15 parts
Ethylene-butylene copolymer	?	?	?	?
					Ethylene propylene copolymer	?	?	?	?
Styrene-butadiene-copolymer	?	?	?	?
					Fire retardant:	?	?	?	?
Dihydroxyphenyl propane bis phosphoric acid diphenyl ester	5 parts	5 parts	5 parts	5 parts
					Triphenylphosphate	?	?	?	?
Tritolyl Phosphate	?	?	?	?
					Antimildew and antibacterial agent:	?	?	?	?
Silicone quaternary ammonium salt	2.5 part	5 parts	2.5 part	0.5 part
					Bitertanol	?	?	?	?
Dibenzoyl peroxide	?	?	?	?
					A-bromobenzene propenal	?	?	?	?
Antiaging agent:	?	?	?	?
					4,4 '-thiobis (the 6-tertiary butyl-3-methylphenol)	?	?	?	?
β-(tri-grades of butyl-4-hydroxy phenyls of 3,5-) propionic acid octadecanol ester	2.5 part	2.5 part	8 parts	2.5 part
					Tris phosphite (2,4-di-tert-butyl-phenyl)	?	?	?	?
Two (2.4-di-tert-butyl-phenyl) pentaerythritol diphosphites	?	?	?	?

The antimildew and antibacterial type polycarbonate composition of a kind of applicable outdoor use of various embodiments of the present invention and comparative example 3, its production method all each component mixes rear extruding pelletization, obtains cold resisting type antimildew and antibacterial series polycarbonate resin polymkeric substance.In the present embodiment, during mixing, use homogenizer to stir, while extruding, adopt 75# twin screw extruder, rotating speed is 450r/min, and the first district of forcing machine temperature is that 270 ℃， bis-district's temperature are 275 ℃, three district's temperature are that 275 ℃， tetra-district's temperature are that 275 ℃， five district's temperature are 270 ℃.

The performance test condition of the antimildew and antibacterial type polycarbonate composition of a kind of applicable outdoor use of various embodiments of the present invention and comparative example 3 is as shown in Table 2:

Table two:

As shown in Table 3, wherein table three is the test data under subtropical environment to the performance perameter of the test gained of the antimildew and antibacterial type polycarbonate composition of a kind of applicable outdoor use of various embodiments of the present invention and comparative example 3:

Table three:

According to test result, the antimildew and antibacterial type polycarbonate composition of a kind of applicable outdoor use of various embodiments of the present invention has all been possessed good mechanical property, under the outdoor working conditions in subtropics, all possess good antimildew and antibacterial performance simultaneously, another embodiment 3 is comparative example, test data shows, in comparative example 3, antiaging agent consumption is more, its ratio of weight and number is 8, over 5 parts, but to the lifting of weathering resistance not obvious, embodiment bis-discovery of comparing with embodiment mono-, after the ratio of weight and number of antimildew and antibacterial agent surpasses 2.5, no longer obvious to the lifting of fungicidal properties, too much antimildew and antibacterial agent has a certain impact to mechanical property simultaneously, embodiment mono-shows with enforcement four contrasts, the ratio of weight and number of antimildew and antibacterial agent changes the impact of antimildew and antibacterial performance is to significance downwards from 2.5.

Claims (1)

1. be applicable to an antimildew and antibacterial type polycarbonate composition for outdoor use, it is characterized in that counting by weight it composed as follows:

The polycarbonate of 85 parts (PC), the toughner of 1 ~ 20 part, the fire retardant of 1 ~ 10 part, the antimildew and antibacterial agent of 0.1 ~ 5 part, the antiaging agent of 0.1 ~ 5 part;

Described toughner is selected from least one in POE, ethylene-butylene copolymer, ethylene propylene copolymer and styrene-butadiene-copolymer;

Described antimildew and antibacterial agent is selected from least one in silicone quaternary ammonium salt, Bitertanol, dibenzoyl peroxide, alpha-brominated phenyl cinnamic aldehyde;

Described antiaging agent is selected from 4,4 '-thiobis (the 6-tertiary butyl-3-methylphenol), β-(3, tri-grades of butyl-4-hydroxy phenyls of 5-) at least one in propionic acid octadecanol ester, tris phosphite (2,4-di-tert-butyl-phenyl), two (2.4-di-tert-butyl-phenyl) pentaerythritol diphosphites;

Described fire retardant is selected from least one in triphenylphosphate, Tritolyl Phosphate, dihydroxyphenyl propane bis phosphoric acid diphenyl ester.