Composition based resin, a method of producing compositions based on resins and mixtures of fillers for use in the compositions of resin

 

(57) Abstract:

The invention relates to the production of compositions based on thermoplastic resins. Composition based on a thermoplastic resin selected from the group of polyolefins, polyvinyl chloride and polyamide contains from 3 to 400 wt.% filler based on the weight of resin. Moreover, the specified filler includes talc and Microbiocide silicon. The mass ratio between talc and microbiocidal silicon has a value of between 15:1 and 1:15. This composition has high rigidity and high impact strength. 3 S. and 4 C.p. f-crystals, 4 tab., 2 Il.

The technical field to which the invention relates

The present invention relates to new and improved compositions based on resins and in particular to compositions based on thermoplastic resins, such as polyolefins, polyvinyl chloride and polyamide, and the method of production of compositions based on resins. The present invention also relates to mixtures of fillers, designed for use in the manufacture of compositions based on resins.

Prior art

Well known for the production of polyolefins, such as polypropylene mixtures containing functional Napo is CLASS="ptx2">

Talc is a hydrated magnesium silicate with theoretical formula 3MgO4SiO4H2O and it consists of magnesium hydroxide, which is located between the two plates of silicon dioxide.

However, it is established that when to improve other properties, such as impact strength, in addition to talc add other fillers, it turns out that the rigidity achieved when using only one of talc as filler, decreases significantly when to increase impact strength add a second filler. Therefore, it is impossible to obtain polypropylene products with both high stiffness and high impact strength. High rigidity and high impact strength is especially important for some of polypropylene products, such as automobile bumpers. The same is true for other products from thermoplastic resins.

The term "thermoplastic resin" used in this description and the claims, includes not only thermoplastic resin as such, but also their mixtures, and mixtures of thermoplastic resins with other materials, such as elastomeric nitrile rubber. The so-called thermoplay as such include polyolefins, polystyrene, polyesters, ABS copolymers, polyvinyl chloride (PVC), neoplastically polyvinyl chloride (UPVC), polyamide, acrylic polymers, polycarbonates, polysulfones, and others.

From U.S. patent 4722952 know that when added to the polyvinyl chloride of Microbiocide silicon improves the impact strength of polyvinyl chloride, used for the production of electric cables. For such products, the stiffness is not important. On the contrary, the hardness is undesirable for electrical cables.

The term "microbicide silicon used in this description and the claims, means crushed amorphous SiO2obtained by the method in which silicon dioxide is recovered, and the reduction product is subjected to oxidation in the vapor phase with the formation of amorphous silicon dioxide. Microbiocide silicon may contain at least 70 wt.% silicon dioxide (SiO2), have a density of 2.1-2.3 g/cm3and a specific surface area of 15 to 30 m2/year of Primary particles are mostly spherical. The primary particles have an average size of approximately 0.15 μm. Microbiocide silicon preferably receive as soprodukta in the production of silicon or silicon alloys in vostanovitel 2 extracted in the usual way, using a filter or other device to collect the product. For the purposes of the present invention, the term "microbicide silicon" should be understood as including fly ash, in particular particles of fly ash mainly a spherical shape having a size below 10 microns.

The essence of the present invention

The present invention is to develop a thermoplastic resin having as rigidity and impact strength.

In accordance with the first aspect of the present invention relates, therefore, to compositions based on thermoplastic resins, especially polyolefins, polyvinyl chloride and polyamide, characterized in that the composition based on thermoplastic resins contain from 3 to 400 wt.% filler based on the weight of resin, the said filler includes talc and Microbiocide silicon, where the mass ratio between talc and microbiocidal silicon has a value of between 15:1 and 1:15.

According to a preferred variant implementation of the present invention, the mass ratio of talc and Microbiocide silicon has a value of between 6:1 and 1:5.

In accordance with the second aspect of the present invention apply the polyamide, the above method differs in that the talc and Microbiocide silicon is introduced into a thermoplastic resin in a total amount of from 3 to 400 wt.% based on the weight of thermoplastic resin, where the mass ratio between talc and microbiocidal silicon support in the range between 15:1 and 1:15, and then is formed into a composition of a thermoplastic resin.

According to a preferred variant of the method of the present invention, the talc and Microbiocide silicon injected into thermoplastic resin in the form of a mixture of talc and Microbiocide silicon.

Compounding thermoplastic resin can be carried out using known processes such as injection molding, calendering, injection molding and others.

In accordance with a third aspect of the present invention relates to mixtures of fillers for use in termoplastici resins, particularly the polyolefins, polyvinyl chloride and polyamide, when the mixture contains fillers talc and Microbiocide silicon mass ratio of between 15:1 and 1:15, especially between 6:1 and 1:5.

It has been unexpectedly found that the combined use of talc and Microbiocide silica as fillers in thermoplastic resins, especially impact strength.

EXAMPLE 1.

Unfilled polypropylene copolymer VA E supplied by the company Borealis, spazout in the mixing extruder with a blend of fillers consisting of talc, supplied by the firm Mondo Minerals OY, and Microbiocide silicon supplied by the company Elkem ASA. The mass ratio between talc and microbiocidal silicon in the mixture of fillers is 2:1 and the experiments are performed by adding 5, 10, and 19 wt.% mixtures of fillers based on the weight of polypropylene copolymer. Stiffness sprasowanego polypropylene is measured as modulus of elasticity in tension in accordance with ISO 527, and impact strength of extruded polypropylene is measured by the value of impact strength with notch on Sharpie in accordance with ISO 179/1A.

For comparative purposes polypropylene copolymer spazout in the mixing extruder without the addition of filler and with the addition of 5, 10 and 18 wt.% talc and 5 and 10 wt.% Microbiocide silicon. For these comparative experiments also measure the stiffness and impact strength, as described above. The received values of stiffness and impact strength are shown in Fig. 1 and 2, respectively.

As can be seen from Fig. 1 and 2, the impact strength of polypropylene containing and tale, than polypropylene containing only Microbiocide silica as filler. The rigidity of the polypropylene containing talc, and Microbiocide silicon, significantly higher than that of polypropylene containing only Microbiocide silica as filler, and only slightly lower than that of polypropylene containing only talc as a filler. Thus, the use of a mixture of talc and Microbiocide silicon suddenly gives a polypropylene having high rigidity and high impact strength.

EXAMPLE 2.

The copolymer on the basis of unfilled high density polyethylene (HDPE) HDPE HE 2467-BL supplied by the company Borealis, spazout in the mixing extruder with a blend of fillers consisting of talc, supplied by the firm Mondo Minerals OY, and Microbiocide silicon supplied by the company Elkem ASA. The mass ratio between talc and microbiocidal silicon in the mixture of fillers was 2:1, the experiment was carried out with addition of 10 wt.% mixtures of fillers based on the weight of the HDPE-copolymer. The hardness of extruded HDPE is measured in units of the modulus of elasticity in tension in accordance with method ISO 527, and impact strength of extruded HDPE measured as impact strength according to Charpy at the level without adding filler, with the addition of 10 wt.% talc and with the addition of 10 wt. % Microbiocide silicon. Also referred to for comparative purposes, the rigidity and impact strength measured as described above. The received values of stiffness and impact strength are presented in table 1.

As can be seen from table 1, the impact strength of HDPE containing talc, and Microbiocide silicon is higher than that of HDPE containing only talc, but lower than that of HDPE containing as filler only Microbiocide silicon. The stiffness of HDPE containing talc, and Microbiocide silicon, significantly higher than that of HDPE containing only Microbiocide silica as filler, and only slightly lower than that of HDPE containing only talc as a filler. Thus, the use of a mixture of talc and Microbiocide silicon unexpectedly leads to the production of HDPE, and has high rigidity and high impact strength.

EXAMPLE 3.

Unfilled polyvinyl chloride (PVC) will calandro with a blend of fillers consisting of talc, supplied by the firm Mondo Minerals OY, and Microbiocide silicon supplied by the company Elkem ASA. The mass ratio between talc and microbiocidal silicon in the mixture of fillers was 2:1 in one experiment itcot kalandrovogo PVC is measured as the modulus of elasticity in tension in accordance with method ISO 527 and impact strength kalandrovogo PVC is measured as impact strength according to Charpy, in accordance with method ISO 179/1A.

For comparative purposes PVC will calandro without adding filler, with the addition of 5 wt.% talc and with the addition of 5 wt. % Microbiocide silicon. Also for comparison purposes specified stiffness and impact strength measured as described above. The received values of stiffness and impact strength are presented in table 2.

As can be seen from table 2, the impact strength of PVC containing talc and Microbiocide silicon in the ratio of 2:1, is approximately the same as that of the PVC containing only talc, but lower than that of PVC, contains only Microbiocide silica as filler.

You can see that for PVC containing talc and Microbiocide silicon in the ratio of 1:2, impact strength higher than for PVC containing talc and Microbiocide silicon in the ratio of 2:1, and almost as high as for PVC, containing only Microbiocide silicon. The rigidity of PVC containing talc and Microbiocide silicon in the ratio of 2:1, significantly higher than for PVC containing only Microbiocide silica as filler, and only slightly lower than for PVC containing only talc as a filler. You can see that for PVC containing talc and Microbiocide silicon in the ratio of 1: 2, the modulus of elasticity when restiani is and Microbiocide silicon unexpectedly gives PVC, with both high stiffness and high impact strength.

EXAMPLE 4.

Unfilled polyamide polymer (RA), RA Ultramid V, supplied by BASF, spazout in the mixing extruder with a blend of fillers consisting of talc, supplied by the firm Mondo Minerals OY, and Microbiocide silicon supplied by the company Elkem ASA. The addition of a mixture of fillers is 10% by weight of the polymer. The mass ratio between talc and microbiocidal silicon in the mixture of fillers in the first experiment is 1:1 and 1: 2 in the second experiment. The hardness of extruded RA is measured as the modulus of elasticity in tension in accordance with method ISO 527, and impact strength of extruded RA is measured as impact strength according to Charpy, in accordance with method ISO 179/1A.

For comparative purposes RA-copolymer spazout in the mixing extruder without the addition of filler, with the addition of 10 wt.% talc and with the addition of 10 wt.%. % Microbiocide silicon. Also for these comparative experiments rigidity and impact strength measured as described above. The received values of stiffness and impact strength are presented in table 3.

As can be seen from table 3, the impact resistance of RA, stereodinamice only Microbiocide silica as filler. You can also see that the impact strength increases with increase in the number of Microbiocide silicon in the mixture of fillers. The stiffness of RA, and containing talc, and Microbiocide silicon, significantly higher than that of RA, containing only Microbiocide silicon, but the hardness decreases slightly when uvelichivatsa content Microbiocide silicon in the mixture of fillers.

Example 5.

Unfilled polypropylene copolymer VA E supplied by the company Borealis, ekstragiruyut twice through the mixer. During the first passage through the mixer to the copolymer added to 6.67 wt.% talc based on the weight of polypropylene copolymer. During the second passage through the mixer add to 3.33 weight. % Microbiocide silicon based on the weight of polypropylene copolymer. Thus, the weight ratio between talc and microbiocidal silicon added to the copolymer is 2:1 and the total amount of filler is 10% based on the weight of the copolymer.

In the second test the above method is repeated except that the amount added talc is 13,33% by weight polypropylene copolymer and the number of added Microbiocide silicon is equal to 6.67% in the calculation in the way to 20 wt.% based on the weight of polypropylene copolymer and the weight ratio between talc and microbiocidal silicon is 2:1. For comparison polypropylene copolymer ekstragiruyut in the extruder without adding filler. The hardness of extruded polypropylene is measured as the modulus of elasticity in tension in accordance with ISO 527 and impact strength of extruded polypropylene is measured as impact strength with notch on Sharpie in accordance with ISO 179/1A.

The results are shown in table 4.

As can be seen from table 4, the impact strength of polypropylene is very high and even higher than in example 1, where talc and Microbiocide silicon added to the mixture. Stiffness is also very high. This proves that the talc and Microbiocide silicon can be added separately to achieve very good results.

1. Composition based on a thermoplastic resin selected from the group of polyolefins, polyvinyl chloride and polyamide, and a filler, characterized in that the composition based on thermoplastic resin contains from 3 to 400 wt. % filler, based on the weight of resin, with specified filler includes talc and Microbiocide silicon, where the mass ratio between talc and microbiocidal silicon has a value of between 15: 1 and 1: 15.

2. Composition based on a thermoplastic resin under item 1, from the ptx2">

3. A method of obtaining a composition based on a thermoplastic resin selected from the group of polyolefins, polyvinyl chloride and polyamide, and a filler, wherein the filler containing talc and Microbiocide silicon, is introduced into thermoplastic resin in the total number lying between 3 and 400 wt. percent, based on weight of thermoplastic resin, and where the mass ratio between talc and microbiocidal silicon support between 15: 1 and 1: 15, and then is formed into a composition of a thermoplastic resin.

4. The method according to p. 3, characterized in that the filler containing talc and Microbiocide silicon, is introduced into thermoplastic resin in the form of a mixture of talc and Microbiocide silicon.

5. The method according to p. 3, characterized in that the filler includes talc and Microbiocide silicon, which added to thermoplastic resin separately.

6. The mixture of fillers for use in the compositions based on a thermoplastic resin selected from the group of polyolefins, polyvinyl chloride and polyamide, characterized in that the mixture contains fillers talc and Microbiocide silicon mass ratio of between 15: 1 and 1: 15.

7. The mixture of fillers on p. 6, characterized in that the mixture of filler content is

 

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