DE1544803A1 - Process for the production of molding compounds based on tactical homo- or copolymers of vinyl chloride - Google Patents

Description

Troisdorf. the 1Iyyy

NOBüiL AKTIi] IiGaSEiLLSCHAi ¹ T i'roisdorf Bez. Cologne

'Process for the production of molding compounds on the basis of tactical homo- or co-polymers of vinyl chloride

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ils is known the mechanical properties of tactical To improve polyvinyl chloride by adding chlorinated atactic polyvinyl chloride; see Belgian patent specification 626 843 · Products made from molding compounds on this basis stand out due to a high dimensional stability in the heat and. through improved mechanical values versus those of purely tactical values Polyvinyl chloride, however, for example, the U-notch toughness is sufficient for certain purposes not off «

It is also known atactic polyvinyl chloride with high molecular weight To elasticize compounds such as chlorinated polyethylene, which results in optimum values here with regard to the Ü-notch toughness} butadiene polymers and copolymers are also used and graft polymers, polyurethanes and copolymers of ethylene and vinyl acetate or ethylene and acrylic acid esters as Plasticizers for use. ''

As already apparent from the Belgian patent specification 626 843, attempts were made to also use molding compounds based on tactical polyvinyl chloride with butadiene copolymers and chlorinated polyethylene, but these additives did not show the same effectiveness as with atactic polyvinyl chloride ..

Js has now been found that the above-mentioned run of iJlastifizie- _e ^- si £ omponents Llischpolyuere of vinyl acetate Rait ethyl en tactical polyvinyl chloride was added, resulting Orinmasö ^ n & Rait particularly high U-iCerbzähigkeiten with respect to the products produced therefrom with hardly reduced Vicat temperature. In the pale to corresponding grain skins made of atactic polyvinyl chloride, surprisingly, the I-notch toughness ran even higher, although one must process these ordinary materials at temperatures between 190 and 10 ° C, because in general the U-notch strengths decrease with increasing processing > opening body door. As shown in Examples 9 and 10, the U-notch toughness of a test plate made of atactic polyvinyl chloride is 5 'parts

Copolymers of vinyl acetate and ethylene at 190-210 C processing temperature 5 »9» at 170-180 C processing temperature 8.8 cmkp / cm. Ide test plate produced analogously to 190-210 G. made of tactical polyvinyl chloride shows, according to Example 7, a U-notch toughness that is still well above that of that processed up to 180.degree Test plate made of atactic polyvinyl chloride lies.

The copolymers of vinyl acetate and ethylene used for elasticization should have a vinyl acetate content of 30-70 Qevt.fo and a relative viscosity (1 ^ Ag in chloroform) between 1.8 and 6.5. The copolymers can also be crosslinked, the degrees of crosslinking being between 10 and 40, determined by the chloroform absorption * in g -per g of polymer after storage for 24 hours at 20 ° C. in chloroform. Molding compounds made from tactical polyvinyl chloride and cross-linked! Copolymers made from vinyl acetate-ethylene are also characterized by increased resistance to chemicals. The content of copolymers of vinyl acetate-ethylene in the molding compounds is between 0.5 and 10

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based on da, s polyvinyl chloride. ^r 7 * '

009813/1608 BAD original

As a tactical polyvinyl chloride, a polymer! s-.t denotes, whose chloro atoms are arranged syndiotactically to about 55-85> j Tactical polyvinyl chloride can be produced by various processes, see e.g. »SAS 1 187 374» the Belgian patent specification 627 674 and British patents 895 153 and 93t 629.

For the characterization of tactical polyvinyl chloride, in addition to the X-ray orbital examination, the heat resistance according to Vicat (YDE 0302 Paragraph ¹ ) can also be used, and the degree of viability of tactical polyvinyl chloride is around l5 ° above that of atactic polyvinyl chloride Tactical Hoaopölyiiiereh des Tinylchlorids can also tactical Gopölyraere Jes' / inylchlörids φΐΐ Cöaonöiaeren ^ between 0,5 ühd 20öe # * 70, -.vie for example ethylene, propylene, vinyl acetate acrylic acid esters, i.ichloi "Äihyien and similar with deix copolymers made of vinyl acetate and ethylene fjeiaiis der Jri'itiäu-äg are elasticized every day % ti this ilör

j Pdlyvinyldthei * ü » da as well as istähiliaa j Füitstcif-'e etc. eiithälii *

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15U803

Example 1;

100 parts of tactical polyvinyl chloride (RN , 2.8) are rolled with 1.5 parts of tin stabilizer (trade name 17 M) and 0.5 part of lubricant (trade name j ^ wax) at 190 ° C. and pressed at 210 ° C. to form a test plate.

Example 2-8; Under the conditions given in Example 1, an additional 5 parts of the elasticizing component are incorporated into the batch on the roller.

Example 9 <

Instead of the 100 Jeile tactical polyvinyl chloride - as in Example 7 - 100 parts of atactic polyvinyl chloride used.

Example 10:

. "ie Example 9> however, the processing follows on the i / alze at 170 and on the press cei 180c.

The table below shows the results.

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iilastification component Tensile strength-elongation U-notch “Vicat speed ρ (yo) (cml: p / cm) (C) , - (kp / cm).

1. -

2.5% polyethylene

(Plaskon 101) *

3.5 parts chlorinated polyethylene. (Plaskon 105) * 645

550

525

55

60

3.1

5.4

4.9- 'S8

4 «, ο parts of polyurethane (Estane

645

21

2.0

5 "i'eile gopolyethylene-II-ethyl acrylate

(DPD 6169) * 53Ö

27

5.2

6 »5 parts of graft butadiene styrene I, 'ie methyl methacrylate

(Paraloid 228) * 595

28;

5.6.

7. 5 parts of Copo.lyra * Tinylacetate-II.ethylene

(Levapren 450} * 40

.8, 5 parts iievapren 450 * networked 9. 5 'file LaTäFapren · 450 *' 03 * 5 ', parts Befwapren, 450 *

55

5.4

a, a

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Claims (1)

Patents η-spray . Process for the production of -ö'ormciassen on the basis of tactical homo- or Qopolyiaerisaten of Vinylc "lorids, characterized, that, for the elasticization of Llischpolyiuere / inrlacetat and ethylene in Hengen of 0.5 to 10 Gew.yo incorporated, their acetate _ö -eh.alt between 30 and and their relative "viscosity is 1.8 to 6.5. 'ά. Process according to Claim 1, characterized in that the yinylacetate-ji-ethylene copolyiders are crosslinked. 003813/1608