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A kind of low-chlorinated chlorinated polypropylene with excellent solution stability at low temperature and preparation method thereof

A technology of chlorinated polypropylene and solution stability, which is applied in the field of polypropylene resin, can solve problems such as increased production costs, and achieve the effects of excellent performance, excellent color and luster and adhesion

Active Publication Date: 2022-07-12
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Metallocene polypropylene or acid-modified polypropylene with a low melting point has disadvantages in terms of cost or availability, resulting in a substantial increase in the production cost of low-temperature and high-fluidity CPP

Method used

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  • A kind of low-chlorinated chlorinated polypropylene with excellent solution stability at low temperature and preparation method thereof
  • A kind of low-chlorinated chlorinated polypropylene with excellent solution stability at low temperature and preparation method thereof
  • A kind of low-chlorinated chlorinated polypropylene with excellent solution stability at low temperature and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0054] The preparation method of maleic anhydride grafted polypropylene raw material:

[0055] (1) Equipment manufacturer: Coperion, model: CTE20 PLUS, nine-section barrel, screw diameter 20mm, length-diameter ratio 26.

[0056] (2) Operating parameters: 2000g polypropylene versify 4200, 60g maleic anhydride, 40g cumene hydroperoxide, and 10g N,N-dimethylformamide (DMF) within the particle size range of 10-100 mesh are fully Mix uniformly and feed to CTE20 PLUS twin-screw extruder with a residence time of 10 minutes. The barrel temperature was set to 190°C (1st barrel - 8th barrel) to carry out the reaction, and the 8th barrel was exhausted to remove unreacted maleic anhydride and DMF to obtain maleic anhydride-modified propylene-based Regular copolymer. Reaction starting materials used in Example 5.

[0057] (3) the mensuration of maleic anhydride grafting ratio: get a certain amount of above-mentioned grafts and granulate, in a certain amount of xylene, after heating and ...

Embodiment 1

[0067] The present embodiment synthesizes chlorinated polypropylene according to the following method:

[0068] (1) Vistamaxx 6502, a commercially available brand of ExxonMobil random copolymer polypropylene, uses ethylene as a comonomer, and the propylene structure accounts for 87%. Characterized by infrared, the wavenumber peak is 998cm -1 / 973cm -1 The peak area ratio is 37%, and the peak wave number is 840cm -1 / 973cm -1 The peak area ratio of 26%. Its infrared spectrum is as figure 1 shown.

[0069] In a 20L enamel reaction kettle, add 10kg of chlorobenzene and 1.5kg of Vistamaxx 6502 (melting index 45g / 10min, weight average molecular weight 150,000, molecular weight distribution 2.2), heat up to 120°C, keep the temperature for 20min to completely dissolve the polypropylene, and then Cool down to 70°C and purge with nitrogen for 20min;

[0070](2) 2.5g of azobisisobutyronitrile AIBN was added, after purging with nitrogen for 10min, the nitrogen was closed, and the ...

Embodiment 2

[0079] The present embodiment synthesizes chlorinated polypropylene according to the following method:

[0080] (1) Using Japan's Idemitsu brand low-grade polypropylene, commercially available brand product L-MODU TM S600, is a homopolymer polypropylene with an isotacticity of about 76%. Characterized by infrared, the wavenumber peak is 998cm -1 / 973cm -1 The peak area ratio is 55%, and the peak wave number is 840cm -1 / 973cm -1 The peak area ratio of 40%.

[0081] In the 20L enamel reaction kettle, add 10kg chlorobenzene and 1.5kg L-MODU TM S600 (melting index 350g / 10min, weight average molecular weight 75,000, molecular weight distribution 2.5), heat up to 120°C, keep the temperature for 20min to completely dissolve the polypropylene, then cool down to 80°C, and purge with nitrogen for 20min;

[0082] (2) Add 2.5% of dibenzoyl peroxide BPO, continue nitrogen purging for 10min, close the nitrogen gas, change the chlorine gas, the chlorine gas feeding rate is 7.5g / min,...

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Abstract

The invention provides a low-chlorinated chlorinated polypropylene with excellent solution stability at low temperature and a preparation method thereof. In the infrared spectroscopic spectrum of the raw material polypropylene used in this method, the wave number is 998cm ‑1 Peak / 973cm ‑1 The peak area ratio of the peak is 25% to 80%, and the wave number is 840cm ‑1 Peak / 973cm ‑1 The peak area ratio of the peaks is 15% to 50%. The 20% toluene solution prepared with the resin obtained by the chlorination reaction was refrigerated at ‑20°C for 30 days to maintain good fluidity without gelation or precipitation. The ink composition for gravure printing or offset printing using the chlorinated polypropylene resin , showing good adhesion on polyolefin substrates.

Description

technical field [0001] The invention belongs to the field of polypropylene resins, and in particular relates to a low-chlorinated chlorinated polypropylene with excellent solution stability at low temperature and a preparation method thereof. Background technique [0002] Thermoplastic resins include polar and non-polar resins. Among non-polar resins, polyolefin resins such as polypropylene and polyethylene have many excellent properties such as cheapness and ease of molding, chemical resistance, water resistance, electrical insulation properties, and safety. properties, so it has been widely used in recent years. As the second largest general-purpose plastic in the world, polypropylene consumes more than 60 million tons per year. Since polypropylene is a non-polar plastic with low surface energy and high crystallinity, the adhesion of inks, coatings or adhesives on its surface is very poor in finishing and bonding applications. Therefore, polypropylene substrate adhesion p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F8/22C08F210/06C08F110/06C08F255/02C09D11/108C09D11/106
CPCC08F8/22C09D11/108C08F210/06C08F110/06C08F255/02Y02P20/52
Inventor 郑超石滨黎源李同和尚永华
Owner WANHUA CHEM GRP CO LTD
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