CN103694779A

CN103694779A - Mixed wax for printing oil and preparation method for mixed wax

Info

Publication number: CN103694779A
Application number: CN201310730600.9A
Authority: CN
Inventors: 刘创新; 许益生; 翁渭荣
Original assignee: QUZHOU ZHONGTONG CHEMICAL Co Ltd
Current assignee: QUZHOU ZHONGTONG CHEMICAL Co Ltd
Priority date: 2013-12-14
Filing date: 2013-12-14
Publication date: 2014-04-02
Anticipated expiration: 2033-12-14
Also published as: CN103694779B

Abstract

The invention provides mixed wax for printing ink and a preparation method for the mixed wax. The preparation method comprises the following steps: adding pure water and a polymerization inhibitor into a reaction kettle, adding a certain amount of dispersing agent, a proper amount of initiator and a certain amount of PE (polyethylene) wax/perfluoroalkylethyl acrylate mixture, raising the temperature to reaction temperature, and performing drying and discharging to obtain surface-grafted polyethylene wax powder after reaction; mixing the polyethylene wax powder and PTFE (polytetrafluoroethylene) powder, and pulverizing and crushing the mixture in a pulverizer to obtain a product. According to the mixed wax and the preparation method for the same, a small amount of perfluoroalkylethyl acrylate monomers with double bonds are introduced into a polyethylene wax skeleton as grafting monomers to improve the compatibility of a PE/PTFE polymer, and complete contact and uniform dispersion in a crushing mixing process can be ensured; in addition, multiple carbonyls are introduced into perfluoroalkylethyl acrylate to improve the intermolecular polarity of the mixed wax, damage the crystallinity of printing ink resin and maintain the polarity of the printing ink, so that the hue error resistance and scuffing resistance of the printing ink are improved.

Description

A kind of printing-ink blended wax and preparation method thereof

Technical field

The present invention relates to a kind of preparation method of blended wax, particularly a kind of printing-ink blended wax processed and preparation method thereof.

Background technology

Tetrafluoroethylene wax is added into polymer coating, can improvement table top or transmit the non-wettability of adhesion article travelling belt, and easily sticky article do not stick containing wax coating.Tetrafluoroethylene wax is added into mineral oil or synthetic oil, as viscosifying agent, prepares special oil.Because tetrafluoroethylene wax has the special tortoise of high-low temperature resistant, anticorrosive and low friction, thereby the grease of institute's multiviscosisty also correspondingly had these valuable performances, can get rid of in the special occasions of environment harshness.Tetrafluoroethylene wax is added into ink, can improve the Abherent of ink, is applicable to high speed printing.Tetrafluoroethylene wax is white, can make an addition to any ink, can not affect the color effect of ink.

When EP-A-0890619 discloses the material that produces while particularly using metallocene catalyst system to prepare polyolefin-wax for printing-ink, can bring the scratching protection effect of raising.The purposes of the pure polyolefin-wax of preparing by metalloscene catalyst in printing-ink contained the basic demand for the scratch protection with respect to original ink improvement.Yet, in addition, the scratching protectiveness that some application requiring improve especially in addition or high surface lubrication or good over print ability, as: when printing sand paper or using in packages printing field.

CN1406267 provides the mixture of one or more other additives to preparing the purposes of printing-ink: the homopolymer of the C2-C18 alpha-olefin of a) preparing with metalloscene catalyst or multipolymer and the degradation wax of preparing with the long-chain polyolefine that metalloscene catalyst is produced, b) tetrafluoroethylene of molecular weight (Mn) 30000-2000000g/mol, c), molecular weight (Mn) the thermoplasticity PTFE that is 500000-10000000g/mol.D), amide waxe, e), montanin wax, f), natural phant wax, g), sorbyl alcohol and reaction product saturated and/or unsaturated fatty acids and/or montanic acid, h), synthetic hydrocarbon, i), paraffin and Microcrystalline Wax, j), polar polyolefin waxes, k), polymeric amide, l), polyolefine, for example high-density or Low Density Polyethylene, polypropylene or their multipolymer, reduce the reagent (wetting agent) of surface tension of liquid m), conventionally.

Existing known technology all has complicated components, and cost is high, and between high molecular polymer, consistency is poor, mixes the shortcomings such as inhomogeneous, has affected the use effect in full scale plant

Summary of the invention

For the deficiencies in the prior art, the invention provides a kind of printing-ink blended wax processed and preparation method thereof.In reactor, squeeze into pure water, stopper, adds a certain amount of dispersion agent, initiator, polyethylene wax PE/ perfluor alkyl ethyl acrylate mixture,, be warming up to temperature of reaction, question response finishes. dry closing bag, obtain the polyethylene wax powder of surface grafting. then mix with polytetrafluoroethylene PTFE powder, in pulverizing mill, grind fragmentation, obtain this patent product.

The present invention introduces on a small quantity perfluor alkyl ethyl acrylate monomer with unsaturated link(age) as grafted monomer, to improve the consistency of PE/PTFE polymkeric substance on polyethylene wax skeleton.

The invention provides a kind of printing-ink blended wax processed and preparation method thereof, by following steps, realize:

The preparation of step 1. water

By weight, add 1000 parts of water in pressure reaction still, 0.5-2 part organic chemistry dispersion agent (preferably 0.5 part), stirs;

Described chemical dispersant is selected from polyvinyl alcohol, gelatin or Walocel MT 20.000PV etc., preferably polyethylene alcohol.

The preparation of step 2. oil phase

By weight, by 100 parts of PE waxes, 0-10 part perfluor alkyl ethyl acrylate

Monomer mixes, then adds 0.05-1 part peroxide initiator (preferably 0.2 part), stirs.

Step 3. suspension polymerization

The oil-phase solution preparing in step 2 beaker is added in step 1 and is equipped with in the pressure reaction still of preparing water, first slow rear fast stirring, then from 40-80 ℃ of (preferably 50 ℃) staged temperature reaction 10-15h (preferably 10h), reaction finishes rear blowing, washing microballoon is limpid to water, obtains product.

Step 4. blend is pulverized

85-98 part step 3 is obtained to the polyethylene wax powder of surface grafting. then mix with 2-15 part PTFE powder, weight is ground broken in pulverizing mill, obtains this patent product.

Perfluor alkyl ethyl acrylate (CF described in step 2 ₂) nC ₅h ₇fO ₂monomer structure formula is as follows:

The preferred benzoyl peroxide of peroxide initiator described in step 2.

In step 4, pulverizing mill can be used to preparation/mixed powder or other materials, and described equipment can comprise, without limitation, for example: multiple agitator, comprise revolving stirrer, and multiple pulverizing mill, comprise ball mill, electromagnetic ball grinding machine, disc flour mill, needle mill, high energy impact shredder, stream energy impact mill, reversal nozzle jet mill, fluidised-bed spray grinding machine, beater grinder, tumbling mill, mechanic diffusion handler, or impact mill.In described pulverizing mill, at a high speed and/or high strength can be employed or be applied on dry powder material, to realize high-shear or HI high impact is applied to dry powder material, be preferably fluidised-bed spray grinding machine.

Beneficial effect of the present invention:

Polyethylene wax spheroid carries out surface grafting through perfluor alkyl ethyl acrylate monomer, has improved the consistency with tetrafluoroethylene, can contact fully in being pulverized and mixed process, and dispersion more even.The introducing of many carbonyls in alkyl vinyl ether simultaneously, improves the intermolecular polarity of blended wax, can destroy the crystallinity of ink resin, keeps the polarity of ink, thereby has made to improve anti-aberration ability and the anti-scuffing function of ink.

Embodiment

Following examples are only to further illustrate the present invention, are not restriction the scope of protection of the invention.

The preparation of step 1. water

By weight, add 1000 parts of water in pressure reaction still, 0.5 part of polyvinyl alcohol, stirs.

The preparation of step 2. oil phase

By weight, by 100 parts of PE waxes, 4 parts of perfluor alkyl ethyl acrylate monomers mix, then add 0.2 part of peroxide initiator, stir.

Step 3. suspension polymerization

The oil-phase solution preparing in step 2 beaker is added in step 1 and is equipped with in the pressure reaction still of preparing water, first slow rear fast stirring, then, from 50 ℃ of reactions 10, reaction finishes rear blowing, and washing microballoon is limpid to water, obtains product.

Step 4. blend is pulverized

94 parts of steps 3 are obtained to the polyethylene wax powder of surface grafting. then mix with 6 parts of PTFE powders, weight is ground broken in fluidised-bed spray grinding machine, obtains this patent product.Be numbered SX-1.

Embodiment 2

85 parts of steps 3 are obtained to the polyethylene wax powder of surface grafting. then mix with 15 parts of PTFE powders, weight is ground broken in fluidised-bed spray grinding machine, obtains this patent product.Be numbered SX-2.

Embodiment 3

98 parts of steps 3 are obtained to the polyethylene wax powder of surface grafting. then mix with 2 parts of PTFE powders, weight is ground broken in fluidised-bed spray grinding machine, obtains this patent product.Be numbered SX-3.

Embodiment 4

In step 2, perfluor alkyl ethyl acrylate monomer is 10 parts, the other the same as in Example 1.Products obtained therefrom is numbered SX-4

Embodiment 5

In step 2, perfluor alkyl ethyl acrylate monomer is 10 parts, the other the same as in Example 2, and products obtained therefrom is numbered SX-5.

Embodiment 6

In step 2, perfluor alkyl ethyl acrylate monomer is 10 parts, the other the same as in Example 3, and products obtained therefrom is numbered SX-6.

Embodiment 7

In step 2, perfluor alkyl ethyl acrylate monomer is 2 parts, the other the same as in Example 1, the other the same as in Example 1.Products obtained therefrom is numbered SX-7.

Embodiment 8

In step 2, perfluor alkyl ethyl acrylate monomer is 2 parts, the other the same as in Example 2, the other the same as in Example 1.Products obtained therefrom is numbered SX-8.

Embodiment 9

In step 2, perfluor alkyl ethyl acrylate monomer is 2 parts, the other the same as in Example 3, the other the same as in Example 1.Products obtained therefrom is numbered SX-9.

Embodiment 10

Polyethylene wax powder does not carry out grafting, only carries out the blend of step 4, does not carry out the reaction of step 1-3, the other the same as in Example 1.Products obtained therefrom is numbered SX-10.

Embodiment 11

First, by Powdered initial substance premix, then on fluidized-bed reverse jetting mill, continue to be crushed to average particle size particle size and be less than 10 μ m.Wax joins in printing-ink with dry powdered form.At 115/m ²phoenomatt type paper try to print, on scratch testing tool with 48g/cm ²scratch load, the scratching rate test scratch behavior of 15cm/ second.Evaluating is intensity and the damage that ink shifts to the test scraps of paper after 100 scratching circulations, Hunterlab D25-2 test for aberration.

Production code member	Aberration	Image lesion
			SX-1	2.6	Nothing
SX-2	2.2	Nothing
			SX-3	4.2	Nothing
SX-4	2.1	Nothing
			SX-5	1.9	Nothing
SX-6	3.6	Nothing
			SX-7	7.2	Nothing
SX-8	4.7	Nothing
			SX-9	6.8	Nothing
SX-10	16.8	Have

Claims

1. printing-ink blended wax and preparation method thereof, is characterized in that comprising the following steps:

The preparation of step 1. water

By weight, add 1000 parts of water in pressure reaction still, 0.5-2 part organic chemistry dispersion agent, stirs;

Described chemical dispersant is selected from polyvinyl alcohol, gelatin or Walocel MT 20.000PV etc.

The preparation of step 2. oil phase

By weight, by 100 parts of PE waxes, 0-10 part perfluor alkyl ethyl acrylate monomer mixes, then adds 0.05-1 part peroxide initiator, stirs.

Step 3. suspension polymerization

By weight, the oil-phase solution preparing in step 2 beaker is added in step 1 and is equipped with in the pressure reaction still of preparing water, first slow rear fast stirring, then from 40-80 ℃ of temperature reaction 10-15h, reaction finishes rear blowing, and washing microballoon is limpid to water, obtains product.

Step 4. blend is pulverized

By weight, 85-98 part step 3 is obtained to the polyethylene wax powder of surface grafting. then mix with 2-15 part PTFE powder, weight is ground broken in pulverizing mill, obtains this patent product.

2. printing-ink blended wax and preparation method thereof, is characterized in that step 2) (monomer carries out Surface grafting reaction to PE wax to middle use perfluor alkyl ethyl acrylate, perfluor alkyl ethyl acrylate (CF ₂) nC _sh ₇fO ₂monomer structure formula is as follows:

。