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A kind of plastic modifier with copy function and preparation method thereof

A technology of modifiers and plastics, which is applied in the field of plastic modifiers with copying functions and its preparation, can solve problems such as difficult discharge, unclear glossy and matte surfaces of products, and inability to clearly distinguish bright and matte surfaces, etc., to achieve cost-saving effect

Active Publication Date: 2019-07-12
广州市番禺旭升合成材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] TPR, a kind of thermoplastic rubber material in elastomer, uses thermoplastic styrene-butadiene rubber SBS as the basic raw material, and adds softening oil and other additives to produce high-quality products with high elasticity, aging resistance and oil resistance of rubber, but in terms of effect, Due to the generation of flow lines, the bright surface (glossy surface) and matte surface (subsurface) of the produced products are not obvious, and the production in an effective mold cannot clearly distinguish the bright surface and the matte surface. Surface and matte requirements
[0004] However, the components of spray paint contain a large amount of resin and xylene, which volatilize into the air and remain in the human body after being absorbed by the human body, which is difficult to discharge and causes various diseases

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0030] A kind of preparation method of the plastic modifier with duplicating function of the present invention, comprises the following steps:

[0031] A. Take hydrogenated butadiene-styrene copolymer and peroxide, and mix the two according to the weight percentage of 100:0.02~2. After mixing, carry out chain scission treatment at 200~300°C and dry to obtain Part A Butadiene-styrene small molecule copolymer;

[0032] B. Take polyolefin polymers and peroxides, mix the two according to the ratio of 100:0.01 to 2 by weight, and carry out chain scission treatment at 190 to 230°C after mixing to obtain small molecule polypropylene in part B;

[0033] C. Compounding the part A and the part B, the weight ratio of which is 1-10:2-10, mixing and granulating to obtain the polybutadiene-styrene-propylene of the part C, that is, the plastic Modifier.

[0034] Wherein, preferably, the polyolefin polymer is one or both of polystyrene, poly-α-methylstyrene, polypropylene and polyethylene. ...

specific Embodiment approach

[0053] Step (1): Select oil-extended hydrogenated butadiene styrene copolymer (SEBS), chain breaker-2.5-bis(tert-butylperoxy)hexane DBPH and mix evenly, the weight percentage is SEBS:DBPH=1000: 6.

[0054] Step (2): send to the twin-screw extruder for melt extrusion, the temperature of each temperature zone of the twin-screw extruder from the feed port to the discharge port is: 160°C, 190°C, 210°C, 230°C, 200°C, 170°C, the head temperature is 170°C.

[0055] Step (3): Extrude to obtain a colorless or light yellow small molecule SEBS with broken bonds. It is observed that its fluidity is excellent, and it is sent to a drying oven at 80°C for 1 hour to obtain the processed part A. .

[0056] Step (4): Mix the powdered polypropylene and the chain-breaking agent, the percentage by weight is polypropylene:chain-breaking agent=1000:4.

[0057] Step (5): feeding into a twin-screw extruder for melt extrusion to obtain the treated part B.

[0058] Step (6): Take part A and part B o...

Embodiment 1

[0062] 1kg SEBS and 1kg softening oil, 6g2.5-bis(tert-butylperoxy) hexane DBPH are evenly mixed, placed 24hr, melted and extruded in twin-screw extruder, each section temperature of twin-screw extruder is 160°C, 190°C, 210°C, 230°C, 200°C, 170°C, the head temperature is 170°C, and the obtained product is dried in an 80°C drying oven for 1 hr to obtain a small molecule SEBS with broken bonds.

[0063] 1kg polypropylene powder and 4g2.5-bis(tert-butylperoxy)hexane DBPH are blended uniformly, then the broken small molecule SEBS is mixed with the blended polypropylene powder in a ratio of 1:1, And interrupt chain branching in the twin-screw extruder, the processing temperature is from the feed port to the temperature of each temperature zone of the discharge port: 160 ° C, 180 ° C, 200 ° C, 210 ° C, 190 ° C, 175 ° C, to obtain the polymer of the present invention Butadiene-styrene-propylene.

[0064] Verify the specific properties of the polybutadiene-styrene-propylene:

[0065]...

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Abstract

The invention discloses a plastic modifier with a copying function and a preparation method of the plastic modifier. The plastic modifier is prepared from polybutadiene-styrene-propylene. The preparation method comprises the following steps: A, taking a hydrogenated butadiene-styrene copolymer and peroxide, mixing according to the proportions, and performing chain scission and drying to obtain a part A; B, taking polyolefin polymers and peroxide, mixing according to the proportions, and performing chain scission to obtain a part B; C, compounding the part A with the part B according to the proportions, mixing and granulating to obtain the polybutadiene-styrene-propylene. According to the plastic modifier disclosed by the invention, corresponding physical properties of plastic taking SBS (Styrene-Butadiene-Styrene) as a main body during high-temperature injection molding are changed; by means of the matching of a die, the bright surface and the matte surface of the die are synchronously and integrally copied.

Description

technical field [0001] The invention relates to the field of polymer composite materials, in particular to a plastic modifier with copying function and a preparation method thereof. Background technique [0002] In the field of polymers, there is an important class of substances-elastomers, which generally refer to materials that can return to their original shape after removal of external forces. They deform significantly under weak stress, and can quickly return to their original state and size after stress relaxation. [0003] TPR, a kind of thermoplastic rubber material in elastomer, uses thermoplastic styrene-butadiene rubber SBS as the basic raw material, and adds softening oil and other additives to produce high-quality products with high elasticity, aging resistance and oil resistance of rubber, but in terms of effect, Due to the generation of flow lines, the bright surface (glossy surface) and matte surface (subsurface) of the produced products are not obvious, and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L47/00C08L23/12C08L53/02C08J11/22
CPCC08J11/22C08J2347/00C08J2423/12C08L47/00C08L53/02C08L2205/03C08L23/12Y02W30/62
Inventor 刘和平肖致
Owner 广州市番禺旭升合成材料有限公司
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