DE1810865C - Production of coatings using the fluidized bed sintering process - Google Patents

Description

i 810 865

1 2

It is known for the production of surface-shaped plasticizer-free, fluidized-bed sinterable mass

Coatings obtained after the fluidized bed sintering process without a subsequent thermal

different powdery masses based on poly- post-treatment is required.

Ethylene, such as Pülyäthylen-Polyisobuiylen-Mixtures, Copolymers are preferably with a through

Polyamides, mixed cellulose esters, epoxy resins, chlorinated viscosity with a K value of 53 to 56

rated polyethers and polyvinyl chloride are used. The most favorable propylene content is 1 to

(Brochure from Farbwerke Hoechst, »Plastics 5 percent by weight.

Hoechst vortex sinter, August 1967). That by suspension or suspension and

Polyvinyl chloride coatings have hitherto been copolymers produced by emulsion polymerization

mainly made of plasticizer-containing, fluid-sinterable, io sat of vinyl chloride with propylene (Belgian Palente

powdery mixtures produced (German patent 668 471, 668 472, 668 473) is known-

scripture 1 223 085). demonstrate good flow behavior. For the

For numerous new purposes of such finishing according to the fluidized bed sintering process, a surface layer must, however, a plasticizer content of the fluidized sinterable material is undesirable in addition to an excessive material. So plasticizer-free layers are particularly beneficial because of their melting behavior. The greater rigidity according to the invention, mechanical strength, heat-set copolymers of vinyl chloride with proform resistance and better electrical properties are superior both through good flow properties. Further advantages of the plasticizer retention as well as an excellent melt-free polyvinyl chloride masses are that they do not last due to short melting times and homotetrating plasticizer migration, and the lower possible meltability. Mainly because of this flammability and the improved chemical and good melting behavior, this is weather resistance according to the invention. In addition, the copolymers used must be superior to the layers used to date, which come into contact with copolymers,
come, also be free from plasticizers. 15 Furthermore, the surface-coated ones stand out

Therefore, even with the use of small workpieces, dense, pore-free and high-gloss

Proportions of suitable solvents or plasticizers from the coating layers.

for polyvinylchloride fluid-sinterable polyvinylchloride For the production of a fluid-sinterable powdery

Ride masses produced and the resulting upper mass is the vinyl chloride-propylene copolymer

surfaces after the sintering process of a long-lasting 30 with known processing aids according to the usual

Subsequent thermal treatment (Japanese processes cold mixed or hot agglomerated. This

Patent application 4971/67). Mixtures are capable of eddy currents; who thus

It is also known that with the help of a held coating, however, sometimes

polyvinylchlo- homogeneous and unevenly melted areas that are capable of being softened and free of plasticizers,

Ride Compound on Suitable Surfaces Coatings 35 It is therefore expedient to mix cold or hot

can achieve. The coatings obtained in this way are mass subjected to a granulation process and that

but porous and must be ground to a thermal after-obtained granulate to a powder,

The powdery mass should have a defined grain size.

To develop pore structure (Japanese patent application size distribution. The main part should be a

dung 16 435/67). Plasticizer-free, powdery poly-40 grain size from 0.04 to 0.50 now, preferably from 0.10 to

However, vinyl chloride compositions show 0.30 mm in the case of fluidized bed sintering.

process poor flow properties, which also The high thermal stress on the mass

by using known flow aids on during the sintering process requires the use

Based on polymethacrylate », polyvinyl chloride vinyl - highly effective stabilizers. The developing

esters, polyethylene vinylucetates, chlorinated poly- 45 speaking standard subilisalorsystenie

Ethylenes and polyethylene waxes are not used sufficiently. Uu / Cd-

can be improved. The so obtained coated and zinnoyan stabilizers with Synergistis> ch

tuiigcn / inherent thermal damage and are active additives such as organic phosphates and

also with regard to their pore structure, non-epoxidizable ferric acid esters, since these stabilizer

frying. 50 combinations do not postpone

At the same time the attempt to hastily influence surface information.

Copolymers of vinyl chloride with maleic For better () berllädieiiausbildiiii | J can expedient

säiirecstern, Iiimars.iiiiecstern, acrylic acid ester », Vi- müßigerweiic nodi (! leitmittel, f .. H auf ll.isis long-

nyloilcrii or Ailiylenvinylacct.il her / iislcllcn, felt cellular Miintansäurecsler of the C Aluin-Kelteiile

niilil / um l'ifulg 55 C ₁₄ bis (', "with the weit.uu (', part rolled around C ₁₁

It has now been found that ml α its tctl saponified in lolgroups or p.itliellc

according to the Wirbclsiiiterveffaliieii pore-free, gliillu and (ilycerinfellsäiirecsluroderlaiii'kollino, gcsatliglcAlko-

voilic ΙιιιιπιΐμΐΊΐι; Ik-.thidilungc »erli.ilti.-ii weide» liole with a carbon atom length: vnn preferably C _u

I UUiH 11, MLMIi in.in copolymers of the Vin> lililnridi mil mill C ₁ , or l'nly.itliylunw idiic with tiiu: iii Molckul; ir-

L-Mi '.' Iii i'in / I) L ₁ IIIIIIIiICII l'inp> lcii |; di.ilt, lh WIihei- Ί "luwidil von hevot / uiU! IM) O bi 1 ¹ MNK) ikiu Wirlielsinler-

.1 nt> -it, 1 Ixt '«M ism u v.-rvveiidel powder / UgC ₁ Cl /! wet ilen. You: tin.ii bulling from further

ι η'Mil 1 iiul li'i I rliiiduiit! i> l the use of vnn /us.ii/. 11 v * ie at puliv .i.e I iililsliiliilis.iluiiMi, Atiti-

(upi.ljiiifii, ii 11 ms ¹ M) to ')'> (iewiclKspni / üiit V m> l- 0xy1l.111lit.-11, Anti.tiilik.i snwn: from l'i); i »eiilcii and

ilili 11.1 mill I in. IO (krtidilspio / enl f'i.> Pyk-n mil I .1 r l >> l 1 itl'cii ist mügliih I kr / 11. Ic mwi ΙϋΙΚίοίΓεη

However, in IIIk-K WUI ', <> ii M) liii (A) i Pulveifoiiii / 111 llei · ή =, is by its Hi eiiitriichligiiiig of Aiif-

stilliiii |! from vvi κ hiii.u litriffrei Uesdin.liliiiiven ii.uh sditiiel / and I lidlvi ili.illtns the M.iv.c only limited

dem Wmtuliiiiturvv-ifiliitii i ') ailiiidi ucmIui Iioiiio zul, is-> iu

uciii! iiDfL-nfrei Deit.liit-hliingeii; ius this powder - Zur Vcihes-ici πιιμ der phy-nkalisdt media

Claims (1)

3 4 Properties such as impact strength, notched impact strength-sireck limit (kp / em ³ ) 575/550/555 wedge and breaking strength, the usual modes of elongation (° / _D ) .10 / 22/25 fication agents are used. While mixed impact strength (cmkp / cm ³ , 20 "C) 5 Pniben not polymers of ethylene with vinyl acetate when broken into salt in the usual amounts the melting behavior 5 notched impact strength (cmkp / cin ¹ . affect only insignificantly, influence modes 20 ⁰ C) 2.5 / 2.4 / 2.4 fixing agent based on methyl methacrylate-lhita-vicat (5 kp, glycol) 69/60 / 6'J diene — styrene or acrylonitrile — butadiene — styrene or. . Nitrile - rubber or vinyl chloride butadiene - H e ι s ρ ι e I - Acrylonitrile or vinyl chloride-ethylene-vinyl acetate io Furthermore, a copolymer of ¹ J5% vinyl or chlorinated polyethylene, the melting behavior is chloride and 5% propylene and the K value is below 56 the fluidized bed sintered mass is much stronger and can use the recipe mentioned in example 1 therefore only be dosed in relatively small amounts. with the same manufacturing and processing conditions In the production of surface coatings, coatings are used for the coating described, With the help of the fluidized-bed sintering process it has been shown that 15 this fluidized-bed sintered material also resulted in layers that the temperature control ensures the coating quality in the above-mentioned perfect quality, influenced. DL mechanical property values have been found to be particularly favorable for Creation of coatings with the according to the invention if determined on 4 mm press plates: We used sinterable materials a preheating yield point (kp / cm ¹ ) 540/560/545 temperature range of the workpiece from 260 to 32O ° C ao elongation ( ⁰ I ₀ ) 30/35/27 The exact temperature is not of the prostitute impact strength (cmkp / cm ² , 20 ° '., 5 samples) tion of the thermal conductivity of what is to be coated is broken Material dependent. The immersion time of the notched impact strength to be coated (cmkp / cm ² , ! ends body in the fluidized bed depends on the 20 ⁰ C) 2.7 / 2.8 / 2.6 desired layer thickness and lies between 1 and »5 Vicat (5 kp, GIy * oil) 67/67/67 12 seconds, preferably between 3 and 7 seconds. ". 13th All percentages of quantities relate to e 1 s ρ ι e on percent by weight. A fluidized bed sintered mass was made from 100 parts by weight of the copolymer mentioned in Example 1, B e i s p. i e 1 1 30 1.0 part by weight of didecylphenyl phosphite, 3.0 parts by weight of a solid Uariuni-Cadniium-Stahilizer- ,, It became a whirlwind sintering; from 100 parts 2.5 parts by weight of an epoxidized fatty acid ester ·. Copolymer of the composition ') 8.4% vinyl with an epoxy oxygen content of 6 to 6.5%, chloride and 1.6% propylene and the K value 53 and 0.5 parts by weight of one already characterized above 3.0 parts of a liquid organotin stabilizer, 35 polyethylene wax and 0.5 parts by weight of an hc- 2.5 parts of an epoxidized fatty acid ester with a partially saponified Montau- Epoxy oxygen content of 6 to 6.5% and 1 part of acid ester according to the same as mentioned in Example i of a Montansäiireester already characterized above manufacturing and processing conditions to the hot mix using a high-speed mixer ». surface coating described in unchanged This mixture was granulated and then processed 40 of perfect quality, crushed on a baffle plate mill. The powdery mechanical property values were also Molding compound had determined the required grain size distribution in this case on 4 mm pressed boards: and did not need to be sighted. Corner limit (kp / cm ² ) 580/570/586 In the fluidized bed was then an in elongation (%) 40/37/44 a shift oven for 20 minutes to 270 | 5 C pre- »5 impact strength (cmkp / cm ³ , 20 C) 5 samples not Warmed 5 mm thick sheet steel broken in for 3 seconds submerged. Notched impact strength (cmkp / cm ² , The workpiece treated in this way was with 20 "C) 2.6 / 2.5 / 2.6 a high-gloss, smooth, pore-free equal Vicat (5 kp, glycol) 70 // 0/70 moderate layer with a thickness of 0.4 mm over- 50 The same qualitative experience, i.e. the dukes. Furthermore, no color changes could be made to a high-gloss, smooth, pore-free Hanging due to thermal damage to the vertebral glcidymium layer was also found in l-insaU Isa siiileriinissc be observed. Mischpolymeri.ats from llcbeispiel 2 in combination mn It turned out to be more precise that thermal processing aids were used. treatment was not required. ss PitentaiHPiMdi Investigating the meilum'sdicii I. igenuluft .-- values of the described Ilcsdiiditiii ^ must, ge · use of copolymers au. W Ua measure 111t 4 mm thick Ptdlphilk-n n.iili the DIN- 'W (iewithlspni / ail vinyl chloride and I to IU U. Standards 51 4iS, i.l ISl h / w. VlM O) I) !, lI | mI>, il.ill wiclil pro / unl l'ionyli.-ii with a K Wit of iliu data with jnien der desULlieiidu-n H.iit PVC- 60 50 hi. M) in powder form /.ir Ila l < ΙΙιιιιμ> .πι wm II Types vctgleidibiir are, jeiloth ilei V11.it value i'l'v.is ni.idiLifaicii lli-idiichl'iii'ü.'ii null iUi <i WnUI '' - - '= ■■■ MIlIl ¹ IM If, llllt Il