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A kind of door and window sealing strip composition and preparation method thereof

A sealing strip and composition technology, applied in the field of chlorinated polyethylene sealing strip composition and its preparation, can solve the problems of performance degradation, poor cold resistance, high market price, etc., and achieve high tensile strength and low temperature embrittlement resistance performance, reduce production costs, and improve production efficiency

Inactive Publication Date: 2020-09-04
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the sealing strips for plastic doors and windows are basically made of soft polyvinyl chloride materials, because a large amount of plasticizers used in them will gradually migrate and lose as the product is used for a long time, resulting in performance degradation, hardening and brittleness, and poor cold resistance.
One of the solutions to this problem is to use rubber materials, but the manufacturing process of rubber products is cumbersome and complicated, and the raw materials and production costs are high
[0003] Solving the problem of plasticizer precipitation in the formulation has always been a hot spot in the research of sealing strips. Through literature analysis, it is found that there are not many literatures on the anti-plasticizer precipitation performance in the formulation of door and window sealing strips.
[0005] The applicant found that in the routine test of the present invention, it was found that the cohesive force values ​​of plasticizers such as DOP, DOTP, TOTM, and even polyester plasticizers in soft polyvinyl chloride were greater than 12N, and the high melting index, high VA The high molecular weight plasticizers such as ethylene-vinyl acetate copolymer, although the bonding force between the sealing strip and the PCM sheet can be made very small, but these high molecular plasticizers are all pellets, and they are mixed with polyvinyl chloride resin powder. The uniformity of bulk blending is not good, resulting in insufficient stability of the sealing strip performance, and these pellets often suffocate the feeding screw in the twin-screw extrusion granulation; moreover, these polymer plasticizers are used in a large amount in the formula, Compared with the market price, it is relatively high, and it is not easy to purchase, which limits the application of polymer plasticizers in sealing strips

Method used

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  • A kind of door and window sealing strip composition and preparation method thereof
  • A kind of door and window sealing strip composition and preparation method thereof
  • A kind of door and window sealing strip composition and preparation method thereof

Examples

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preparation example Construction

[0054] The synthetic method of carbon dioxide base polymer, comprises the steps:

[0055] 1) dry monomer: epoxy compound with CaH at room temperature 2 Mixed, stirred for two days, evaporated under reduced pressure, degassed three times to remove oxygen, and then stored at low temperature under anhydrous and anaerobic conditions for later use; 2 After passing through the dehydration and deoxygenation silica gel column, it is passed into step 2) polymerization reaction system;

[0056] 2) Polymerization reaction: Pre-install a stirrer in the autoclave, put it into the glove box, add 38.5mg of rare earth dialkyl compound as a catalyst, then measure 2mL of cyclohexene oxide and add it to the autoclave, after the autoclave is assembled Take out the glove box, put CO 2 To the pressure of 4.9MPa, adjust the heater to the reaction temperature of 70°C, start timing, and react for 15 to 48 hours; after the reaction is completed, add chloroform to dilute the reaction solution, and the...

Embodiment 1～12

[0058] The preparation method of embodiment 1~12 adopts following steps:

[0059] 1) Add chlorinated polyethylene, polyvinyl chloride, calcium-zinc composite stabilizer, magnesium oxide, stearic acid, paraffin and DCP into the high-speed mixer, start high-speed mixing and slowly add DOP, and finally add carbon black and titanium dioxide Calcium carbonate pretreated with ester coupling agent, stirred at 90 degrees for 5 minutes.

[0060] 2) Add the above powder into the twin-screw extruder for shear extrusion granulation, the twin-screw structure is combined into strong shear, and the granulation temperature

[0061] 160-170 degrees, the obtained thermoplastic elastic pellets can be used for the production of plastic door and window sealing strips.

[0062] The preparation method of calcium carbonate pretreated by titanate coupling agent described in step 1): add calcium carbonate in the mixer, start stirring, heat up to 70°C-80°C, and then uniformly add titanate by spraying m...

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Abstract

A door and window sealing strip composition comprises the following parts by weight of raw materials: 60 to 80 parts of chlorinated polyethylene; 20 to 40 parts of polyvinyl chloride; 10 to 20 parts of a plasticizer; 2 to 3 parts of magnesium oxide; 3-6 parts of a calcium and zinc compound stabilizer; 0.5-1 part of stearic acid; 0.5-1 part of paraffin; 0.5-1.5 part of a peroxide crosslinker; 0.5-1part of a titanate coupling agent; 30 to 40 parts of calcium carbonate and 2 to 3 parts of carbon black. The door and window sealing strip composition has high anti-precipitation performance, can meet high-speed extrusion production of 80 m / min, improves production efficiency, has high tensile strength and low temperature embrittlement resistance, and is suitable for use in low temperature areas.

Description

technical field [0001] The invention belongs to the technical field of processing and application of polymer materials, and in particular relates to a chlorinated polyethylene sealing strip composition and a preparation method thereof. Background technique [0002] At present, the sealing strips for plastic doors and windows are basically made of soft polyvinyl chloride, because a large amount of plasticizer used in them will gradually migrate and lose with the use time of the product, resulting in performance degradation, hardening and brittleness, and poor cold resistance. One of the solutions to this problem is to use rubber materials, but the manufacturing process of rubber products is cumbersome and complicated, and the raw material and production costs are relatively high. [0003] Solving the problem of plasticizer precipitation in the formulation has always been a hot spot in the research of sealing strips. Through literature analysis, it is found that there are not ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/28C08L27/06C08L67/02C08L69/00C08K13/02C08K3/22C08K5/09C08K3/26C08K3/04
CPCC08K2201/003C08L23/286C08L2205/03C08L2205/035C08L27/06C08K13/02C08K2003/222C08K5/09C08K2003/265C08K3/04C08L67/02C08L69/00
Inventor 王勋林
Owner QINGDAO UNIV OF SCI & TECH
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