CN106243561A - A kind of aging-resistant PVC and preparation method thereof - Google Patents

Abstract

The invention discloses a kind of aging-resistant PVC, it is characterized in that, it is prepared from by the raw material of following weight portion: Corvic, phenol, the formalin of 8 10%, aluminium hydroxide, the aqueous acetic acid of 8 10%, white carbon black, PTT, palmitoleic acid, formic acid, hydrogen peroxide, magnesium oxide, zinc oxide, ethylene bis stearamide, three (nonyl phenyl) phosphite ester, Tissuemat E, chlorinated polyvinyl chloride resin, octadecylimidazoline, Polyethylene Glycol.The feature that the PVC that the present invention prepares has high intensity and high tenacity is laid equal stress on, strong shock resistance, and product component is cheap, the market competitiveness is big.

Description

A kind of aging-resistant PVC and preparation method thereof

Technical field

The present invention relates to construction material, particularly relate to a kind of aging-resistant PVC and preparation method thereof.

Technical background

Polrvinyl chloride (PVC) difficulty is fired, wear-resisting, resist chemical, gas steam are low leakage good, has excellent mechanical property Can, the PVC product transparency, electrical insulating property, heat insulation, eliminate the noise, shock absorbing good, be the versatile material that cost performance is excellent, building lead Territory is made into overall plastic window frame, is extensively applied.But PVC material is hard, plasticity is poor, impact resistance and weatherability poor, belong to the most crisp Material, especially low-temperature flexibility are poor, in order to meet the building trade demand to hard PVC goods in the epoch to mould Dai Gang, no The disconnected range of application expanding high impact plastics, improves processing conditions, overcomes PVC plastic black brittleness and to notch sensitivity Shortcoming, for many years, the research of PVC toughening modifying is the most active

Gao Changquan, Wang Haiyan use the shock resistances such as polyvinyl chloride resin, EVA, CPE, ACR in " research of high impact PVC pipe " literary composition Modifying agent, the raw material such as organic tin stabilizer, calcium stearate, OPE, PE wax, titanium dioxide, carbon black is prepared for the high-impact of a kind of modification Hit PVC, and the physical and mechanical property of its excellence is tested, analyzes, evaluated.This tubing has at a relatively high toughness, Can apply under more rugged environment, retain the high design stress of tradition PVC-U tubing simultaneously.

Summary of the invention

It is an object of the invention to provide a kind of aging-resistant PVC and preparation method thereof.

To achieve these goals, present invention employs following technical scheme:

A kind of aging-resistant PVC, it is characterised in that it is prepared from by the raw material of following weight portion: Corvic 200 parts, phenol 8-10 part, formalin 40-50 part of 8-10%, aluminium hydroxide 15-20 part, the aqueous acetic acid of 8-10% 30-35 part, white carbon black 15-20 part, PTT 8-10 part, palmitoleic acid 20-25 part, formic acid 5-8 part, dioxygen Water 2-3 part, magnesium oxide 5-8 part, zinc oxide 5-8 part, ethylene bis stearamide 10-12 part, three (nonyl phenyl) phosphite ester 3-4 Part, Tissuemat E 5-6 part, chlorinated polyvinyl chloride resin 3-4 part, octadecylimidazoline 3-4 part, Polyethylene Glycol 8-10 part.

Described aging-resistant PVC, it is characterised in that it is prepared from by following steps:

(1) formalin of phenol and 8-10% is mixed, heat and stir, making phenol all dissolve；Add aluminium hydroxide, 70-90 DEG C of reaction 8-10h, adds the aqueous acetic acid of 8-10%, is cooled to room temperature and carries out decompression dehydration, obtains liquid mixing Thing；Add white carbon black and PTT, 100-110 DEG C of stirring reaction 3-5h, be dried, obtain activated carbon black；

(2) at 60-80 DEG C-, palmitoleic acid is mixed with acetic acid, after mix homogeneously, drips hydrogen peroxide while stirring, drip After, 80-90 DEG C of reaction 10-12h, it is washed to neutrality, vacuum dehydration；Addition magnesium oxide and zinc oxide, ultrasonic mixing 30-40min, Add ethylene bis stearamide, 80-110 DEG C of stirring reaction 3-5h, after reaction terminates, cool down, obtain product；

(3) by Corvic, activated carbon black, the product of step (2), three (nonyl phenyl) phosphite ester adds in mixer Mix, be then heated to 75-85 DEG C, stir 3-4h；Continue the material in mixer is stirred, and be sequentially added into poly- Ethylene waxes, chlorinated polyvinyl chloride resin and antistatic additive octadecylimidazoline are stirred 5-8h and are warmed to 105-110 After DEG C, after adding Polyethylene Glycol stirring 2-3h, it is cooled to 55 DEG C of dischargings；Pre-mixed material is joined in extruder through superfusion Melt, plastify, the process such as mixing from the continuous extruded material of head, be PVC material；

(4) by the conical double screw extruder extrusion molding of PVC material, pipe, conical double screw extruder die head are obtained Temperature 180-195 DEG C；After air cooling, enter water-cooled sizing tank after pipe extrusion determined the outside dimension of tubing by calibration sleeve, cold But temperature 15-20 DEG C of water；Through being cut into pieces after pipe cooling and shaping, obtain pipe to be orientated；

(5) pipe to be orientated is immersed in 90-98 DEG C of water bath, heating in water bath 3-6min, it is passed through 90-98 DEG C in making tube chamber Hot water, carries out axial tension, rate of extension 25-30mm/s with stretching device by pipe；To tube cavity heat while pipe stretching Water applies pressure, and heat hydraulic pressure is 1.6-3.0MPa, makes pipe radially dilate by the pressure of pipe inner chamber hot water, dilates Meanwhile, with sizing sleeve pipe, the pipe external diameter swollen is carried out sizing, after sizing, pipe is placed on the water-bath that temperature is 10-15 DEG C Middle cooling, cool time is 3-7min, and polyvinyl chloride pipe is shaped to finished product.

The invention has the beneficial effects as follows: the present invention utilizes white carbon black toughened modified polyvinyl chloride resin, and activates it, makes charcoal Black being evenly dispersed in polrvinyl chloride, the motion for polrvinyl chloride strand has inhibition, in addition to reducing cost, also Rigidity and the thermostability of material can be improved, improve weatherability, increase dimensionally stable and be conducive to extrusion and sizing, giving full play to The low price advantage of PVC and excellent mechanical property thereof；Add chlorinated polyvinyl chloride resin, and with three (nonyl phenyl) phosphorous Acid esters synergism, increases heat stability and the ageing resistace of polychloroethylene pipes；The PVC that the present invention prepares has height The feature that intensity and high tenacity are laid equal stress on, strong shock resistance, and products material are cheap, and the market competitiveness is big.

Detailed description of the invention

A kind of aging-resistant PVC of the present embodiment, it is prepared from by the raw material of following weight portion: polrvinyl chloride tree 200 parts of fat, phenol 10 parts, the formalin 50 parts of 10%, aluminium hydroxide 20 parts, the aqueous acetic acid 35 parts of 10%, white carbon black 20 Part, PTT 10 parts, palmitoleic acid 25 parts, 8 parts of formic acid, hydrogen peroxide 3 parts, magnesium oxide 8 parts, zinc oxide 8 Part, ethylene bis stearamide 12 parts, three (nonyl phenyl) phosphite ester 4 parts, Tissuemat E 6 parts, chlorinated polyvinyl chloride resin 4 Part, octadecylimidazoline 4 parts, Polyethylene Glycol 10 parts.

The aging-resistant PVC of the present embodiment, it is prepared from by following steps:

(1) formalin of phenol and 8-10% is mixed, heat and stir, making phenol all dissolve；Add aluminium hydroxide, 90 DEG C of reaction 10h, add the aqueous acetic acid of 8-10%, are cooled to room temperature and carry out decompression dehydration, obtaining liquefied mixture；Add Enter white carbon black and PTT, 110 DEG C of stirring reaction 5h, be dried, obtain activated carbon black；

(2) at 80 DEG C, palmitoleic acid is mixed with formic acid, after mix homogeneously, drip hydrogen peroxide while stirring, after dripping, 90 DEG C of reaction 12h, are washed to neutrality, vacuum dehydration；Add magnesium oxide and zinc oxide, ultrasonic mixing 40min, add ethylene double hard Acyl amine, 110 DEG C of stirring reaction 5h, after reaction terminates, cooling, obtain product；

(3) by Corvic, activated carbon black, the product of step (2), three (nonyl phenyl) phosphite ester adds in mixer Mix, be then heated to 85 DEG C, stir 4h；Continue the material in mixer is stirred, and be sequentially added into polyethylene After wax, chlorinated polyvinyl chloride resin and antistatic additive octadecylimidazoline are stirred 8h and are warmed to 110 DEG C, add After Polyethylene Glycol stirring 3h, it is cooled to 55 DEG C of dischargings；Pre-mixed material is joined in extruder through melting, plastify, mixing Etc. process from the continuous extruded material of head, it is PVC material；

(4) by the conical double screw extruder extrusion molding of PVC material, pipe, conical double screw extruder die head are obtained Temperature 180 DEG C；After air cooling, enter water-cooled sizing tank after pipe extrusion determined the outside dimension of tubing by calibration sleeve, cool down water Temperature 20 DEG C；Through being cut into pieces after pipe cooling and shaping, obtain pipe to be orientated；

(5) pipe to be orientated is immersed in 90 DEG C of water bath, heating in water bath 6min, it is passed through the hot water of 90 DEG C in making tube chamber, uses Pipe is carried out axial tension, rate of extension 30mm/s by stretching device；Pressure is applied to tube cavity hot water while pipe stretching, Heat hydraulic pressure is 3.0MPa, makes pipe radially dilate by the pressure of pipe inner chamber hot water, while dilating, uses sizing sleeve pipe The pipe external diameter swollen being carried out sizing, pipe is placed on after sizing in the water-bath that temperature is 15 DEG C cooling, cool time is 7min, polyvinyl chloride pipe is shaped to finished product.

After tested, the PVC of the present embodiment, impact strength is more than 5KJ/m², hot strength is more than 60MPa, and fracture is stretched Long rate is more than 30%.

Claims (2)

1. an aging-resistant PVC, it is characterised in that it is prepared from by the raw material of following weight portion: polrvinyl chloride tree 200 parts of fat, phenol 8-10 part, formalin 40-50 part of 8-10%, aluminium hydroxide 15-20 part, the aqueous acetic acid of 8-10% 30-35 part, white carbon black 15-20 part, PTT 8-10 part, palmitoleic acid 20-25 part, formic acid 5-8 part, dioxygen Water 2-3 part, magnesium oxide 5-8 part, zinc oxide 5-8 part, ethylene bis stearamide 10-12 part, three (nonyl phenyl) phosphite ester 3-4 Part, Tissuemat E 5-6 part, chlorinated polyvinyl chloride resin 3-4 part, octadecylimidazoline 3-4 part, Polyethylene Glycol 8-10 part.

2. according to the aging-resistant PVC described in claim 1, it is characterised in that it is prepared from by following steps:

(1) formalin of phenol and 8-10% is mixed, heat and stir, making phenol all dissolve；Add aluminium hydroxide, 70-90 DEG C of reaction 8-10h, adds the aqueous acetic acid of 8-10%, is cooled to room temperature and carries out decompression dehydration, obtains liquid mixing Thing；Add white carbon black and PTT, 100-110 DEG C of stirring reaction 3-5h, be dried, obtain activated carbon black；

(2) at 60-80 DEG C-, palmitoleic acid is mixed with formic acid, after mix homogeneously, drips hydrogen peroxide while stirring, drip After, 80-90 DEG C of reaction 10-12h, it is washed to neutrality, vacuum dehydration；Addition magnesium oxide and zinc oxide, ultrasonic mixing 30-40min, Add ethylene bis stearamide, 80-110 DEG C of stirring reaction 3-5h, after reaction terminates, cool down, obtain product；

(3) by Corvic, activated carbon black, the product of step (2), three (nonyl phenyl) phosphite ester adds in mixer Mix, be then heated to 75-85 DEG C, stir 3-4h；Continue the material in mixer is stirred, and be sequentially added into poly- Ethylene waxes, chlorinated polyvinyl chloride resin and antistatic additive octadecylimidazoline are stirred 5-8h and are warmed to 105-110 After DEG C, after adding Polyethylene Glycol stirring 2-3h, it is cooled to 55 DEG C of dischargings；Pre-mixed material is joined in extruder through superfusion Melt, plastify, the process such as mixing from the continuous extruded material of head, be PVC material；

(4) by the conical double screw extruder extrusion molding of PVC material, pipe, conical double screw extruder die head are obtained Temperature 180-195 DEG C；After air cooling, enter water-cooled sizing tank after pipe extrusion determined the outside dimension of tubing by calibration sleeve, cold But temperature 15-20 DEG C of water；Through being cut into pieces after pipe cooling and shaping, obtain pipe to be orientated；

(5) pipe to be orientated is immersed in 90-98 DEG C of water bath, heating in water bath 3-6min, it is passed through 90-98 DEG C in making tube chamber Hot water, carries out axial tension, rate of extension 25-30mm/s with stretching device by pipe；To tube cavity heat while pipe stretching Water applies pressure, and heat hydraulic pressure is 1.6-3.0MPa, makes pipe radially dilate by the pressure of pipe inner chamber hot water, dilates Meanwhile, with sizing sleeve pipe, the pipe external diameter swollen is carried out sizing, after sizing, pipe is placed on the water-bath that temperature is 10-15 DEG C Middle cooling, cool time is 3-7min, and polyvinyl chloride pipe is shaped to finished product.