CN104086711A

CN104086711A - Tetrafluoroethylene-hexafluoropropylene copolymer wax for improving smoothness of coating

Info

Publication number: CN104086711A
Application number: CN201410311964.8A
Authority: CN
Inventors: 王琪宇; 董建国
Original assignee: QUZHOU ZHONGTONG CHEMICAL Co Ltd
Current assignee: QUZHOU ZHONGTONG CHEMICAL Co Ltd
Priority date: 2014-06-26
Filing date: 2014-06-26
Publication date: 2014-10-08
Anticipated expiration: 2034-06-26
Also published as: CN104086711B

Abstract

The invention provides tetrafluoroethylene-hexafluoropropylene copolymer wax for improving smoothness of a coating. The wax is prepared by feeding pure water and a polymerization inhibitor into a reaction kettle, adding a certain amount of dispersing agent, initiator, tetrafluoroethylene-hexafluoropropylene copolymer powder, N-vinyl pyrrolidone, 4,5-difluoro-2,2-bi(trifluoromethyl)-1,3-dioxo heterocyclopentene and maleic anhydride, heating to a reaction temperature, and after the reaction is completed, centrifugally drying, thereby obtaining the wax.

Description

A kind of perfluoroethylene-propylene wax that strengthens the smooth performance of coating

Technical field

The present invention relates to a kind of preparation method of polymer-wax, particularly a kind of perfluoroethylene-propylene wax that strengthens the smooth performance of coating.

Background technology

In the preparation of coating material, generally with 0.01-10% concentration, add wax.Generally PE wax, PTFE wax, PP wax, amide waxe, FT paraffin, montanin wax, natural wax, coarse-grain and microcrystalline wax, polyethylene and ethylene copolymers, Isosorbide Dinitrate and metallocenes wax, with same their blend, form with thin slice, particle, powder, dispersion, emulsion or powder compounds adds these wax, and conventional type of service is the fine powder powder that granularity is at most 4 μ m.Use these waxes to reach following effect in coating material: better scratch-resistant, better wear resistance, the better dispersion of pigment, better pigment stability, the improvement of sedimentation tendency, the improvement of pigment redispersion, for the activity orientation material of effect pigment, effectively delustring, gratifying sense of touch, the improvement of oilness, the improvement of metal mark, reach effective introducing of effect pigment, the impact of rheological property, better adhesion inhibiting properties, better sand milling, degassed additive in powder coating, for increasing the additive of powder coating output.

CN 1429257 provides the purposes of wax mixture for improvement of coating material performance, this wax mixture comprises homopolymer or the multipolymer of the C2-C18 alpha-olefin of a) preparing by metallocene catalyst, with equally from the degradation wax of the relative high chain length manufacture of polyolefins of producing by metallocene catalyst, with, as auxiliary agent, one or more are selected from other following wax: b) PE wax, c) PTFE wax, d) PP wax, e) amide waxe, f) FT paraffin, g) montanin wax, h) natural wax, i) coarse-grain and microcrystalline wax, j) polar polyolefin waxes, or k) Isosorbide Dinitrate, l) polymeric amide, m) polyolefine, n) PTFE, o) wetting agent, p) silicate.

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 perfluoroethylene-propylene wax that strengthens the smooth performance of coating.

In reactor, squeeze into pure water, stopper, adds a certain amount of dispersion agent, initiator, perfluoroethylene-propylene powder/NVP/4,5-bis-is fluoro-2,2-bis-(trifluoromethyl)-1,3-dioxole/maleic anhydride, be warming up to temperature of reaction, question response finishes. and dry closing bag, obtain this patent product.

The invention provides a kind of perfluoroethylene-propylene wax that strengthens the smooth performance of coating, by following steps, realize:

The preparation of step 1. water

By weight, add 1000 parts of water in reactor, 0.5-2 part emulsifying agent, stirs;

The preparation of step 2. oil phase

By weight, by 100 parts of perfluoroethylene-propylene powders, 1-5 part NVP, 1-5 part 4,5-bis-is fluoro-2,2-bis-(trifluoromethyl)-1,3-dioxole, 5-15 part maleic anhydride monomer mixes, then adds 0.2-1 part peroxide initiator, stirs.

Step 3. polyreaction

The oil-phase solution preparing in step 2 is added in step 1 and is equipped with in the reactor of preparing water, first slow rear fast stirring, then, from 70-100 ℃ of reaction 10-15h, reaction finishes rear blowing, and washing microballoon is limpid to water, and centrifugal drying, obtains product.

Described chemical dispersant comprises anionic emulsifier, is any one in chain alkyl type anionic emulsifier, Perfluorocaprylic Acid sylvite or the ammonium salts such as ammonium lauryl sulfate, Sodium dodecylbenzene sulfonate, hexadecyl benzene sulfonic acid sodium salt, B-53, Voranol EP 2001 sodium sulfate and paraffinic hydrocarbons sodium sulfonate and the pungent sulfonate sodium of perfluor alkane or ammonium salt.And nonionic emulsifier, be any one in Voranol EP 2001, polyoxyethylene alkyl phenyl ether, polyxyethylated allyl ether, polyoxyethylene shrink Sorbitol Powder fatty acid ester, polyoxyethylene sorbitol fatty acid ester, glycerol fatty acid ester.Preferred hexadecyl benzene sulfonic acid sodium salt.

The preferred Potassium Persulphate of described peroxide initiator, ammonium persulphate.

Described 4,5-bis-is fluoro-2,2-bis-(trifluoromethyl)-1, and 3-dioxole is commercially available prod, the product of producing as Shanghai En Fujia Science and Technology Ltd.; Described NVP is commercially available prod, the product that as above special Chemical Industry Science Co., Ltd produces in the sea; Described perfluoroethylene-propylene powder is commercially available prod, as the product of Zhejiang Xingteng Chemical Co., Ltd's production.

Beneficial effect of the present invention:

Perfluoroethylene-propylene wax spheroid is through 4,5-bis-fluoro-2,2-bis-(trifluoromethyl)-1,3-dioxole and NVP carry out surface modification, for water-based or alcohol dissolubility (polar solvent system) coating system, can increase substantially the slipping of coating, due to acrylic resin, urethane resin, Synolac, epoxy resin, Vinylite, nitrocellulose resin etc. can be compatible, so can be widely used in all kinds water-borne coatings or alcohol soluble paint.

Embodiment

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

Embodiment 1

The preparation of step 1. water

In in 2000L reactor, add 1000Kg water, 2Kg hexadecyl benzene sulfonic acid sodium salt, stirs.

The preparation of step 2. oil phase

In 500L reactor, by 100Kg perfluoroethylene-propylene powder, 3Kg NVP, 2Kg4,5-bis-is fluoro-2,2-bis-(trifluoromethyl)-1,3-dioxole monomer mixes, then adds 0.2Kg ammonium persulphate, stirs.

Step 3. polyreaction

The oil-phase solution preparing in step 2 is added in step 1 and is equipped with in the reactor of preparing water, first slow rear fast stirring, then, from 84 ℃ of reaction 10h, reaction finishes rear blowing, and washing microballoon is limpid to water, and centrifugal drying obtains product, is numbered SX-1.

Embodiment 2

The preparation of step 1. water

In in 2000L reactor, add 1000Kg water, the pungent sodium sulfonate of 0.5Kg perfluor alkane, stirs.

The preparation of step 2. oil phase

In 500L reactor, by 100Kg perfluoroethylene-propylene powder, 1Kg NVP, 1Kg4,5-bis-is fluoro-2,2-bis-(trifluoromethyl)-1,3-dioxole monomer mixes, then adds 0.05Kg ammonium persulphate, stirs.

Step 3. polyreaction

The oil-phase solution preparing in step 2 beaker is added in step 1 and is equipped with in the reactor of preparing water, and first slow rear fast stirring, then from 70 ℃ of reaction 15h, reaction finishes rear blowing, washing microballoon is limpid to water, and centrifugal drying obtains product, is numbered SX-2.

Embodiment 3

The preparation of step 1. water

The preparation of step 2. oil phase

In 500L reactor, by 100Kg perfluoroethylene-propylene powder, 5Kg NVP, 5Kg4,5-bis-is fluoro-2,2-bis-(trifluoromethyl)-1,3-dioxole monomer mixes, then adds 1Kg ammonium persulphate, stirs.

Step 3. polyreaction

The oil-phase solution preparing in step 2 beaker is added in step 1 and is equipped with in the reactor of preparing water, and first slow rear fast stirring, then from 100 ℃ of reaction 10h, reaction finishes rear blowing, washing microballoon is limpid to water, and centrifugal drying obtains product, is numbered SX-3.

Comparative example 1

Do not add NVP, the other the same as in Example 1.Products obtained therefrom is numbered SX-4.

Comparative example 2

Do not add 4,5-bis-fluoro-2,2-bis-(trifluoromethyl)-1,3-dioxole, the other the same as in Example 1.Products obtained therefrom is numbered SX-5.

Comparative example 3

Do not add 4,5-bis-fluoro-2,2-bis-(trifluoromethyl)-1,3-dioxole, NVP, the other the same as in Example 1.Products obtained therefrom is numbered SX-6.

Embodiment 4

The micro mist wax that embodiment 1-3 and comparative example 1-3 make, to the introducing in nitrocellulose standard varnish, object for delustring and slip: by dissolver, by disperseing the NC varnish neutralization of 2wt% micro mist wax being introduced to 98wt% then to use framework applicator to be drawn to (60 μ m wet-film thickness) on sheet glass downwards.After dry, measure gloss.

By means of framework applicator, varnish is coated to (at least two plates in each case) on glass (60 μ m wet-film thickness).Plate in baking oven 50 ℃ at stored 24 hour thereafter.In the case, plate is placed, have coating thereon with load 500g weight.Thereafter, evaluation adhesion behavior

?	Gloss (60 ° of angles)	Slide	Blocking characteristics
				NC varnish is without wax	147	0.45	Sizable
SX-1	36	0.15	Nothing
				SX-2	49	0.22	Nothing

SX-3	21	0.11	Nothing
				SX-4	52	0.28	Trace
SX-5	79	0.31	Trace
				SX-6	92	0.37	One _{A bit}

Claims

1. a perfluoroethylene-propylene wax that strengthens the smooth performance of coating, is characterized in that comprising the following steps:

The preparation of step 1. water

The preparation of step 2. oil phase

Step 3. polyreaction

2. a kind of perfluoroethylene-propylene wax that strengthens the smooth performance of coating according to claim 1, it is characterized in that, step 2) in, use NVP, 4,5-bis-fluoro-2,2-bis-(trifluoromethyl)-1,3-dioxole, maleic anhydride carries out surface aggregate modification to perfluoroethylene-propylene powder.