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Preparation method for maleic anhydride grafted modified polyolefin wax

A polyolefin wax and maleic anhydride technology, applied in the field of polyolefin wax graft modification, can solve the problems of poor instant dispersion, easy self-polymerization, side reactions, etc., and achieve uniform reaction system, stable quality, and mild reaction conditions Effect

Active Publication Date: 2015-01-14
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the activator styrene and maleic acid monoester are active monomers and participate in the grafting reaction, the products that do not want to be grafted with other monomers are limited
Although the maleic anhydride monomer is added in stages, due to the poor dispersion at the moment of addition, the local high-concentration monomer is easily self-polymerized under the action of the initiator, resulting in side reactions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0027] The preparation method of wax-coated peroxide microcapsules uses low-molecular alcohol as a solvent, the mass ratio of low-molecular alcohol to the total amount of peroxide and wax is 3:1~6:1, and the temperature is 50°C~90°C , dissolve the wax, add non-ionic surfactant, then add peroxide, stir evenly (control stirring speed 3000~8000r / min), cool down to 25℃~30℃, remove solvent by vacuum filtration, blow dry with nitrogen to obtain wax Coated with peroxide microcapsules.

[0028] Further, low molecular alcohol is used as solvent, and the mass ratio of low molecular alcohol to peroxide and the total amount of wax is 3:1~6:1. Dissolve the mixture, add non-ionic surfactant, the state is translucent, then add peroxide powder, control the stirring speed 5000~8000r / min, cool down to 25°C~30°C, remove the solvent by vacuum filtration, blow dry with nitrogen, Wax-coated peroxide microcapsules are obtained.

[0029] Among them, the low molecular weight alcohol acts as a solven...

Embodiment 1

[0047] Raw material ratio: 1000g of polyethylene wax L105, 80g of maleic anhydride, 50g of wax-wrapped peroxide type I (type I-1), 15g of wax-wrapped peroxide # 15g of liquid paraffin is dispersed into a fluid paste at room temperature.

[0048] Reaction conditions: reaction temperature 150°C~160°C, reaction time 1.0hr, initiator addition times 3 times.

Embodiment 2

[0050] Raw material ratio: polyethylene wax L105 1000g, maleic anhydride 150g, wax-wrapped peroxide type I (type I-2) 100g, wax-wrapped peroxide with 15 # 20g of liquid paraffin is dispersed into a fluid paste at room temperature.

[0051] Reaction conditions: reaction temperature 170°C~180°C, reaction time 0.5hr, initiator addition times 1 time.

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Abstract

The invention discloses a preparation method for maleic anhydride grafted modified polyolefin wax. According to the invention, a melt grafting process is employed, and a wax-wrapped peroxide microcapsule is used as an initiator; polyolefin wax and maleic anhydride are fully mixed, then the wax-wrapped peroxide microcapsule is added, so side reaction caused by radical local reaction is avoided, a reaction system is uniform and smooth, reaction conditions are mild, reaction efficiency is high, an acid value of a product is high, and the quality of the product is stable.

Description

technical field [0001] The invention belongs to the technical field of polyolefin wax graft modification, in particular to a preparation method of maleic anhydride graft modified polyolefin wax. Background technique [0002] Polyolefin wax is a polyolefin with a molecular weight of 1000~5000, mainly including polyethylene wax and polypropylene wax. There are several sources such as polymer cracking, organic monomer polymerization, and by-products of polymer production. Widely used in daily chemical, leather, ink, plastic, textile, construction, machinery and other fields. Grafting modification of polyolefin wax to give it more excellent solvent dispersibility, pigment dispersibility, lubricity, water dispersibility and other properties has always been paid attention to. [0003] Maleic anhydride graft modified polyolefin wax is an important technical means. The raw material of maleic anhydride has wide sources, economical price and strong reactivity. For polyolefin waxes...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F255/02C08F4/34
Inventor 赵起超
Owner CHINA PETROLEUM & CHEM CORP
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