CN102675871A

CN102675871A - Low-water absorption polyamide 66/polypropylene alloy material

Info

Publication number: CN102675871A
Application number: CN2011100627688A
Authority: CN
Inventors: 吕静; 李军; 蒋中; 许乾慰
Original assignee: SHANGHAI NIUK NEW PLASTIC TECHNOLOGY Co Ltd
Current assignee: SHANGHAI NIUK NEW PLASTIC TECHNOLOGY Co Ltd
Priority date: 2011-03-16
Filing date: 2011-03-16
Publication date: 2012-09-19

Abstract

The invention discloses a low-water absorption polyamide 66/polypropylene (PA 66/PP) alloy material, which takes PA 66 and PP as base materials. The alloy material is characterized by comprising the following components in percentage by weight: 30 to 80 percent of PA 66, 8 to 40 percent of PP, 1 to 10 percent of compatilizer, 0.1 to 1 percent of antioxidant and 0.1 to 1 percent of lubricant, wherein the compatilizer is PP-grafted maleic anhydride, ethylene-vinyl acetate-grafted maleic anhydride or ethylene-octene copolymer-grafted maleic anhydride. Compared with the prior art, the invention has the beneficial effects that the PA66/PP alloy material maintains the high physical and mechanical performance of PA 66, can be used under higher humidity, and has lower water absorption, and the dimensional stability of the material is improved; and due to the use of a small amount of compatilizer, PA 66 master batches with high physical and mechanical performance and water absorption performance can be obtained, requirements for the use of a PA 66 product in a higher-humidity environment can be met, and the cost of the product is lowered.

Description

Low water absorbable nylon 66 polypropylene alloy materials

Technical field

The present invention relates to a kind of nylon material, relate in particular to a kind of low water absorbable nylon 66 polypropylene alloy materials, can be under the higher levels of humidity environment alternative nylon product.

Background technology

Nylon 66 (PA66) is one of the most frequently used engineering plastics, and wear resistance is good, and erosion resistance is strong, and has HS, high-weatherability, and processing characteristics is excellent, is widely used in fields such as automobile, electronics, living utensil, packing.But its water-absorbent is high, makes its dimensional stability relatively poor, has limited it and has further applied.

Vestolen PP 7052 (PP) has light weight, water-intake rate is low, point insulating property is good, the good fluidity easy-formation; The characteristics that price is lower, but its mechanics physicals can not show a candle to nylon 66, if with the two compound composition alloy material; Then can reduce the water-absorbent of nylon 66 significantly; Keep the good physical of nylon 66 simultaneously, and reduce cost, thereby further widen the Application Areas of nylon 66 polypropylene alloy materials.

People such as Li Hui have reported the influence of water-intake rate to nylon 66 mechanical properties on " engineering plastics application " 2008 the 36th volumes the 8th phase 64-67 page or leaf; Water-intake rate all has remarkably influenced to flexural strength, tensile strength, the notched Izod impact strength of PA66; Wherein flexural strength and tensile strength all descend with the water-intake rate increase, and notched Izod impact strength improves with the water-intake rate increase.And find that the physical and mechanical property of nylon descends more obvious when adding the high spun glass of same water-absorbent.

People such as Wu Qinghe then find at the RP that " engineering plastics application " 2007 the 35th volumes the 6th phase 12-15 page or leaf is delivered, in PA6, add the water-absorbent that PP can effectively improve PA6, but its mechanical properties decrease are obvious.

People such as P.Ghosh have reported that at " Polymer " 1998 the 39th volume 193-201 page or leaf grafting PP mainly is that acid anhydrides isopolarity group is with the NH among the PA6 owing to be grafted on the carboxylic acid in the polar monomer on the PP macromolecular chain to the compatibilization of PA6/PP ₂Group generation condensation reaction increases the bonding force between PA6 and the PP, has improved the consistency between PP and the PA6.

Add the water-absorbent that PP can reduce PA66 among the PA66 though existing research is illustrated in, also make the good physical mechanics property loss of energy of intermingling material serious.Its major cause is that the consistency of PP and PA66 is poor, and the interface is prone to phase-splitting during blend, causes material mechanical performance to descend.

Summary of the invention

Technical problem to be solved by this invention is, do not have the problem of low water absorbable and good physical behavior concurrently to existing nylon plastic, and a kind of low water absorbable nylon 66 polypropylene alloy materials that have low water absorbable and good physical behavior simultaneously are provided.

The present invention adopts following technical proposal to solve the problems of the technologies described above: a kind of low water absorbable nylon 66 polypropylene alloy materials are base material with nylon 66 with Vestolen PP 7052, and by weight percentage, each component is respectively:

Nylon 66 30-80%

Vestolen PP 7052 8-40%

Compatilizer 1-10%

Inhibitor 0.1-1%

Lubricant 0.1-1%,

Said compatilizer is polypropylene grafted maleic anhydride, ethene-vinyl acetate grafted maleic anhydride or ethylene-octene copolymer grafted maleic anhydride.The present invention is matrix with nylon 66 with Vestolen PP 7052, is compatilizer with the maleic anhydride graft superpolymer, makes a kind of low water absorbable PA66/PP alloy material, and the low water absorbable ability and the high physical and mechanical property that have solved the PA66 product are difficult to satisfied simultaneously problem.

Its action principle is: be grafted on the carboxylic acid in the polar monomer on the macromolecular chain, acid anhydrides isopolarity group is with the NH among the PA66 ₂Group generation condensation reaction; Bonding force between PA66 and the PP is increased; Improved the consistency between PP and the PA66; Use thereby can satisfy under the higher levels of humidity when making the PA66/PP alloy material keep the good physical and mechanical property of nylon 66, have, the dimensional stability of material is improved than low water absorbable.

In the above-mentioned prescription, the ratio of nylon 66 can be specially 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%, 70%, 75 or 80%;

Vestolen PP 7052 can be specially 8%, 10%, 12%, 15%, 20%, 25%, 30%, 35% or 40%;

Compatilizer can be specially 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9% or 10%;

Inhibitor specifically can be 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9% or 1%;

Lubricant specifically can be 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9% or 1%.

Said lubricant is an ethylenebisstearamide.Lubricant can make nylon 66 polypropylene alloy materials add the demoulding more easily in man-hour, and improves the processing characteristics of nylon 66.

Said inhibitor is the mixture of phenols, ester class, metal passivator or these compounds, like antioxidant 1010 etc.Inhibitor makes nylon 66 and Vestolen PP 7052 in the course of processing, keep chemicalstability, avoids oxidized and makes performance impaired.

Preparation technology of the present invention is: with said components in proportion in high-speed mixer after the mixed number minute, granulation in screw extrusion press, processing temperature 200-300 ℃, the screw rod revolution is at 200-580 rev/min.

Compared with prior art, the present invention has following beneficial effect:

The PA66/PP alloy material can satisfy under the higher levels of humidity when keeping the good physical and mechanical property of PA66 and uses, and has than low water absorbable, and the dimensional stability of material is improved; Through using a small amount of compatilizer, just can obtain all splendid nylon of physical and mechanical property and water absorbing properties 66 master batches, can satisfy under the higher levels of humidity environment request for utilization, and the cost of product descends to nylon 66 products.

Embodiment

Is matrix resin with nylon 66 with Vestolen PP 7052, during each compositions in weight percentage is listed in the table below.

The component concentration of table 1 low water absorbable nylon 66 polypropylene alloy materials

Title material	Embodiment 1	Embodiment 2	Embodiment 3	Embodiment 4	Embodiment 5
						Nylon 66	80	70	60	75	74.7
Vestolen PP 7052	13.7	25.7	33.7	20.7	24
						Compatilizer	5	3	5	3	0
Inhibitor	0.3	0.3	0.3	0.3	0.3
						Lubricant	1	1	1	1	1

Above-mentioned compatilizer is a polypropylene grafted maleic anhydride;

Above-mentioned inhibitor is antioxidant 1010 (3,5-di-t-butyl-4 hydroxy phenyl propionic acid octadecanol ester);

Above-mentioned lubricant is an ethylenebisstearamide.

Said components after the mixed number minute, is sent into to extrude in the screw extrusion press and made material in high-speed mixer in proportion, and processing temperature 200-300 ℃, the screw rod revolution is at 200-580 rev/min.

The PA66/PP alloy that above-mentioned preparation method is obtained carries out the water absorbing properties test: the PA66/PP alloy is processed sample, sample is soaked in water under 90 ℃ of conditions, dry the processing of weighing after 24 hours, and the calculation formula of relative water-intake rate is:

Relative water-intake rate=(handling back sample mass-original sample mass)/original sample mass * 100%

Low water absorbable nylon 66 polypropylene alloy materials to embodiment 1 to embodiment 5 gained carry out physical mechanics and water absorbing properties test:

The physical mechanics and the water absorbing properties of table 2 low water absorbable nylon 66 polypropylene alloy materials

Claims

1. low water absorbable nylon 66 polypropylene alloy materials are base material with nylon 66 with Vestolen PP 7052, and it is characterized in that: by weight percentage, each component is respectively:

Nylon 66 30-80%

Vestolen PP 7052 8-40%

Compatilizer 1-10%

Inhibitor 0.1-1%

Lubricant 0.1-1%,

Wherein, said compatilizer is polypropylene grafted maleic anhydride, ethene-vinyl acetate grafted maleic anhydride or ethylene-octene copolymer grafted maleic anhydride.

2. low water absorbable nylon 66 polypropylene alloy materials according to claim 1 is characterized in that said lubricant is an ethylenebisstearamide.

3. low water absorbable nylon 66 polypropylene alloy materials according to claim 1 is characterized in that said inhibitor is an antioxidant 1010.