Unlock instant, AI-driven research and patent intelligence for your innovation.

PVC (polyvinyl chloride) foam parent material and method for preparing same

A foaming masterbatch and foaming agent technology, applied in the field of PVC foaming masterbatch and its preparation, can solve the problems of low tensile strength, low impact strength, and low bending strength of plastic alloy materials, and achieve low cost and high strength , the effect of simple operation

Inactive Publication Date: 2016-07-20
陈逸君
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] Aiming at the above technical problems, the present application provides a PVC foam masterbatch and its preparation method to solve the technical problems of low tensile strength, low impact strength and low bending strength of existing plastic alloy materials.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Take by weight 100 parts of PVC; 15 parts of azodicarbonamide; 55 parts of DOP; 3 parts of hexamethylenetetramine; 8 parts of tribasic lead sulfate; 6 parts of dibasic lead phosphite; 1 part of zinc oxide; 5 parts of AC blowing agent; 10 parts of NBR; 2 parts of triallyl cyanurate; 14 parts of SBR.

[0027] Put the materials into a high-speed kneader, raise the temperature to 90°C, and knead at 800r / min for 5min.

[0028] Put into twin-screw extruder after kneading, barrel temperature 120°C, 125°C, 130°C, 135°C, 140°C, screw temperature 140°C, head temperature 140°C, 145°C, 150°C, 165°C, 170°C, The screw speed is 55r / min, and the feeding speed is 20r / min.

[0029] High product strength, tensile strength 45MPa, tensile modulus 3300MPa, Shore hardness 70D; impact strength 15kJ / m 2 , heat distortion temperature 90 ℃; flexural strength 25MPa, flexural modulus 2.5GPa; elongation at break 110%, melt flow index 8-12g / 10min.

Embodiment 2

[0031] Weigh 100 parts of PVC according to the weight ratio; 35 parts of azodicarbonamide; 75 parts of DOP; 7 parts of cyclohexamethylenetetramine; 12 parts of tribasic lead sulfate; 10 parts of dibasic lead phosphite; 5 parts of zinc oxide; 25 parts of AC blowing agent; 30 parts of NBR; 6 parts of triallyl cyanurate; 18 parts of SBR.

[0032] Put the materials into a high-speed kneader, raise the temperature to 100°C, and knead for 15 minutes at a speed of 1000r / min.

[0033]Put into twin-screw extruder after kneading, barrel temperature 130°C, 135°C, 140°C, 145°C, 150°C, screw temperature 150°C, head temperature 150°C, 155°C, 160°C, 175°C, 180°C, The screw speed is 75r / min, and the feeding speed is 40r / min.

[0034] High product strength, tensile strength 55MPa, tensile modulus 3400MPa, Shore hardness 73D; impact strength 25kJ / m 2 , heat distortion temperature 95 ℃; flexural strength 35MPa, flexural modulus 3GPa; elongation at break 120%, melt flow index 9g / 10min.

Embodiment 3

[0036] Weigh 100 parts of PVC according to the weight ratio; 20 parts of azodicarbonamide; 60 parts of DOP; 4 parts of cyclohexamethylenetetramine; 9 parts of tribasic lead sulfate; 7 parts of dibasic lead phosphite; 2 parts of zinc oxide; 10 parts of AC blowing agent; 15 parts of NBR; 3 parts of triallyl cyanurate; 15 parts of SBR.

[0037] Put the materials into a high-speed kneader, raise the temperature to 90°C, and knead at 800r / min for 5min.

[0038] Put into twin-screw extruder after kneading, barrel temperature 120°C, 125°C, 130°C, 135°C, 140°C, screw temperature 140°C, head temperature 140°C, 145°C, 150°C, 165°C, 170°C, The screw speed is 55r / min, and the feeding speed is 20r / min.

[0039] High product strength, tensile strength 65MPa, tensile modulus 3500MPa, Shore hardness 75D; impact strength 35kJ / m 2 , heat distortion temperature 100 ℃; flexural strength 45MPa, flexural modulus 3.5GPa; elongation at break 130%, melt flow index 10g / 10min.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Tensile strengthaaaaaaaaaa
Tensile modulusaaaaaaaaaa
Impact strengthaaaaaaaaaa
Login to View More

Abstract

The invention discloses a PVC (polyvinyl chloride) foam parent material and a method for preparing the same. The method includes weighing, by weight, PVC, azodicarbonamide, DOP (dioctyl phthalate), hexamethylenetetramine, tribasic lead sulfate, dibasic lead phosphite, DCP (dicumyl peroxide), zinc oxide, AC (azodicarbonamide) foaming agents, NBR (nitrile butadiene rubber), SBR (styrene butadiene rubber) and triallyl cyanurate. The PVC foam parent material and the method have the advantages that the PVC foam parent material is high in strength, the tensile strength of the PVC foam parent material is 45-85 MPa, the tensile modulus of the PVC foam parent material is 3300-3700 MPa, and the Shore hardness of the PVC foam parent material is 70-80 D; the impact strength of the PVC foam parent material is 15-55 kJ / m<2>, and the thermal deformation temperature of the PVC foam parent material is 90-110 DEG C; the bending strength of the PVC foam parent material is 25-65 MPa, and the bending modulus of the PVC foam parent material is 2.5-4.5 GPa; the breaking elongation of the PVC foam parent material is 110-150%, and the melt flow index of the PVC foam parent material is 8-12 g / 10min; the PVC foam parent material is low in cost and easy to operate and can be widely produced, and accordingly existing materials can be continuously replaced.

Description

technical field [0001] The application belongs to the field of PVC materials, and in particular relates to a PVC foam masterbatch and a preparation method thereof. Background technique [0002] Polyvinyl chloride, English abbreviation PVC (Polyvinylchloride), is a vinyl chloride monomer (vinylchloridemonomer, referred to as VCM) in peroxides, azo compounds and other initiators; or under the action of light and heat according to the mechanism of free radical polymerization. of polymers. Vinyl chloride homopolymers and vinyl chloride copolymers are collectively referred to as vinyl chloride resins. [0003] The molecular weight of industrially produced PVC is generally in the range of 50,000 to 110,000, with a large polydispersity, and the molecular weight increases with the decrease of the polymerization temperature; there is no fixed melting point, it starts to soften at 80 to 85°C, and becomes viscoelastic at 130°C , 160 ~ 180 ℃ began to change into a viscous flow state; ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C08L27/06C08L9/02C08L9/06C08K5/12C08K5/17C08K3/30C08K3/32C08K3/22C08K5/14C08K5/3492C08J3/22C08J9/10B29C47/00
CPCC08L27/06B29C48/022C08J3/226C08J9/103C08J2203/04C08J2327/06C08J2409/02C08J2409/06C08L2203/14C08L2205/02C08L2205/03C08L9/02C08L9/06C08K5/12C08K5/17C08K2003/3045C08K3/32C08K2003/2296C08K5/14C08K5/34924
Inventor 陈逸君
Owner 陈逸君