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Pvc-based plasticised compositions

IPC classes for russian patent Pvc-based plasticised compositions (RU 2431647):
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FIELD: chemistry.

SUBSTANCE: stable plasticised composition contains C4-C30-alkyl-pyrrolidone with a straight, branched or cyclic alkyl radical in amount ranging from more than 10 phr to 400 phr (parts per 100 parts of PVC), sufficient for plasticising said PVC to a flexible state. The PVC product is characterised by Shore hardness (scale A) less than 100 and is in form of calendered sheet, plastisol, foam, dispersion, film, siding, tube or pipe.

EFFECT: ensuring prolonged plastification of PVC in order to endow the PVC-based composition with flexibility, ductility or lower melting point for making articles.

19 cl, 3 ex, 4 tbl

 

The technical field to which the invention relates

The present invention relates to plasticized compositions based on PVC and, in particular, to sustainable plasticized compositions based on PVC, including C4-C30-alkyl-pyrrolidone present in an amount sufficient for the PVC plasticization and making PVC flexibility, softness, elasticity and lower melting temperature.

The level of technology

From prior art it is known that the addition to the PVC of some organic compounds called plasticizers, attached PVC desirable properties such as flexibility, softness, good tactile quality and ease of processing, compliance and lower melting temperature [Encyclopedia of PVC, Vol. 1-2, L.I.Nass (1976)]. When dissolved in PVC plasticizers reduce the energy density of cohesion between the polymer chains and reduce the polar interaction between the atoms of Halogens in PVC. Any organic compound that works as an effective plasticizer for PVC, (a) should have a very high solubility in PVC, (b) must have a polar group, and (c) must have a low capacity for diffusion and release of the polymer during its lifetime. In addition, the plasticizer should not cause color PVC must be non-toxic, have no smell, oblad the th low volatility and be thermally stable at the temperature of mixing and compositions of PVC with plasticizer. Many organic compounds are known to be effective plasticizers for PVC. These compounds include esters of phthalic anhydride with aliphatic alcohols (linear/branched) with four-fifteen carbon atoms in the chain, epoxydecane soybean oil, esters trimellitic acid, phosphates, esters of benzoic and citric acids, and halogenated hydrocarbons. Also as plasticizers are high molecular weight polyesters (mass 800-6000)obtained by condensation of diols with adipic or sabatinovka acids. Of the above compounds due to its excellent compatibility with PVC, ease of welding and versatile desired properties of the most widely used plasticizers based on phthalates.

However, phthalates also have drawbacks. The dioctylphthalate considered as a carcinogenic substance that causes liver cancer in rats. Low molecular weight phthalates allows them to quickly diffuse from PVC and cause "fogging" (muddy sediments) on glass and other transparent surfaces. Also phthalates are easily extracted with organic solvents, which makes them unsuitable for applications requiring contact with solvents.

Prior art in the field is lassification characterized by the following Patents and Published Applications US: 5777014; 6118012; 6706815; 2004/0001948 and 2004/0198909.

U.S. patent 5294644 describes surface-active lactams, which are especially pronounced surface activity for use as additives to the active organic compounds, such as agricultural chemicals and medicines. These lactams have many other unique properties, including anti-static, anti-adhesive and lubricating properties. A particularly valuable property of these lactams was their ability to form a stable emulsion concentrates water-insoluble agricultural chemicals.

Thus, the aim of the present invention is the provision of long plasticization of PVC in order to give compositions based on PVC flexibility, softness, elasticity and/or a lower melting temperature.

Another objective of the present invention is to provide these plasticized compositions based on PVC in order to apply for the manufacture of films, panels, sheets, pipes and pipelines, as well as calendered sheets, plastisols, foams and dispersions.

The INVENTION

Sustainable plasticized composition based on polymer PVC includes alkyl-pyrrolidone with a linear, branched or cyclic C4-C30-alkyl group present is in the amount of 5-400 phr (parts per hundred parts of polymer), sufficient for the plasticization of the specified PVC to a flexible state.

Preferably, the composition includes C6-C2O-alkyl-pyrrolidone is present in amount of at least 5 phr (parts per 100 parts of the composition), preferably 5-400 phr, and most preferably 10-100 phr. With8-C12-alkyl-pyrrolidone, which are liquid at room temperature, are preferred for use in the present invention.

Compositions in accordance with the invention provide PVC products, characterized by the value shore hardness (scale A) from the <100 to <10 (from semi-hard to very flexible).

PVC product in accordance with the invention, including composition, plasticized or one C4-C30-alkyl-pyrrolidone, or in combination with one or more primary or secondary plasticizers may respectively be in the form of a calendered sheet, plastisol, foam or dispersion in the film, siding, pipe or pipeline, etc.

DETAILED description of the INVENTION

Suitable for use as plasticizers in PVC compositions alkyl-pyrrolidone represent alkyl-pyrrolidone with a linear, branched or cyclic C4-C30alkyl group, preferably C6-C20-alkyl-pyrroline is s, including cyclohexylpiperidine, and, most preferably, are liquid at room temperature, such as a linear N-octyl(C8)pyrrolidone (NOP) and linear N-dodecyl(C12)pyrrolidone (NDP), which are commercially available under the trademark Surfadone®LP 100 and 300, respectively, supplied by International Specialty Products (ISP). These C8and C12alkyl-pyrrolidone work effectively in the amount of at least 5 phr, preferably 5-400 phr, and most preferably 10-100 phr, relative to the amount of PVC. The specified amount is enough for the plasticization of PVC flexible state. Can be used in a mixture with one or more primary or secondary plasticizers. Accordingly, the amount of plasticizer allows you to receive plasticized PVC in such diverse forms as calendered sheets, plastisol, foam and dispersion for the manufacture of films, panels, pipes, or pipelines, while PVC has the flexibility, softness, elongation and lower melting temperature.

The following examples explain in more detail the present invention.

EXAMPLE 1

Typical PVC composition according to the invention are shown in Table 1 below.

T the blitz 1
Example No.
Loading (phr)
Additive 1 2 3 4
VESTOLIT®B 7021*(PVC) 100 100 100 100
VESTINOL®9**(DINP) 60
Surfadone®LP 100 (NOP) 60
Surfadone®LP 300 (NDP) 60
* Vestolit®B 7021 (Vestolit Corp./Marl, Germany) is an S-PVC with a constant value of K (the ratio of the mol. mass to viscosity), is equal to 70
** Vestinol®9 is Diisononylphthalate (DINP)

A. Manufacture of calendered sheets using the compositions of Table 1

Calendered sheets of the above compositions with NOP the NDP were much softer and more transparent, than compositions with DINP. Leaves with NOP are the most flexible; about two times softer than the sheet with DINP. Using blends of DINP/NOP (3:1) and DINP/NDP (3:1) were also obtained more flexible sheets than with pure DINP in the same amount (60 phr).

B. Plastisol

NOP and NDP increased viscosity plastisols, showing the beginning of gelation, and also lowered the temperature of gelation and increased the degree of gelation. To achieve long solidification plastisols more appropriate was higher alkyl-pyrrolidone.

C. Foam

We used the following compositions shown in Table 2 below.

Table 2
Example No.
Loading (phr)
Additive 1 2 3 4 5 6
VESTOLIT®B 7021 100 100 100 100 100 100
VESTINOL®9 5 52 47 52 47 42
Surfadone®LP 100 5 10
Surfadone®LP 300 5 10 15
Porofor ADC/L-C2* (1:1) 6 6 6 6 6 6
Lankromark LZK 125** 1,5 1,5 1,5 1,5 1,5 1,5
* Porofor ADC/L-C2 is a foaming agent-based azodicarbonamide
** Lankomark LZK 125 is a regulator on the basis of a mixture of metal salts

Foaming of the above compositions was performed at 200°C. the Obtained result is s foam density (g/cm 3the Y-axis) in relation to the time of foaming (s, X axis) show that the addition of C8or C12alkyl-pyrrolidone allows to obtain a foam of higher density and more stable than with DINP. Adding more NOP and NDP in the composition resulted in a smoother and more smooth surfaces.

D. Variance

2-8% NOP or NDP in aqueous dispersions of PVC lowered the minimum film forming temperature (MFT) from 14 to 2°C, which is a significant reduction and the desired result.

EXAMPLE 2. The effectiveness of plastifitsirovanie when using N-dodecyl-2-pyrrolidone

We used the following compositions shown in Table 3 below.

Table 3
Example No.
Loading (phr)
Additive 1 2 3 4
SOLVIN®271 PC* 100 100 100 100
VESTINOL®9 60
Surfadone®LP 300 20 40 60
Baerostab®CT 9156X** 2,5 2,5 2,5 2,5
* Solvin 271 PC is an S-PVC with a constant value of K equal to 71
** Baerostab CT 9156X is a Ca/Zn stabilizer

Calendered sheets of the above compositions were tested on the shore hardness scale a, tensile strength, elongation at break and water absorption 1 day and 7 days.

Table 4
Example Hardness shore a* The ratio of tensile strength**
(N/mm2)
Elongation at break***
(mm)
Water absorption (%)
1 day 7 days
1 77 20,0 136 0,14 0,19
2 96 23,5 79 0,14 0,18
3 77 11,8 94 0,43 0,67
4 63 6,8 117 0,88 1,15
* Test method ASTM D-2240
** Test method ASTM D-412
*** Test method ASTM D-42

The results in Table 4 show that the compositions of the invention containing 40 phr NDP, provide value shore hardness equal to the value reached at 60 phr Vestinol 9 (DINP), i.e. NDP significantly more effective than DINP in achieving the desired flexibility PVC.

EXAMPLE 3

A. Reduced temperature gelation

In the compositions of PVC, plasticized NOP and NDP, the gelation of PVC occurs at 45°C or below.

B. Increased rate of gelation

Plastifitsirovanie and gelation occur faster in the case of PVC, plastificatola the aqueous NOP and NDP, resulting in increased output.

C. Elasticity

NDP highly effective at getting super-elastic PVC in much lower concentrations than other plasticizers. At 100 phr NDP in PVC (70 K) is reached shore a hardness equal to 40.

The composition of the present invention can be effectively used for the manufacture of insulation and jacket for wire and cable; liners for pools, ponds, landfill, irrigation trenches; protective coatings for water beds; to cover tissue; the basis for carpets; automotive parts such as instrument panels, door panels, armrests, and others; to cover the underbody of the vehicle; tiles; wall coverings; floor coverings; packaging films; conveyor belts; canvas; roll roofing; electrical plugs and connections; inflatable shelters; toys; garden hose; pipes and pipelines; agricultural films; for gaskets of refrigerators and freezers; of soles and upper parts of shoes, production shoes; fishing lures, with the use in the manufacture of the above products is one of the technologies of the prior art, such as calendering, extrusion, plastisol, foam, dispersion.

Although the present invention has been described through the specific references to some embodiments of, it should be understood that there may be changes and modifications that fall within the technical level.

1. Sustainable plasticized composition for the manufacture of products based on polymer PVC, which includes4-C30-alkyl-pyrrolidone with a linear branched or cyclic alkyl radical in an amount of from more than 10 to 400 phr (parts per 100 parts PVC), sufficient to plastifitsirovanie the specified PVC to a flexible state.

2. The composition according to claim 1, where the specified number is more than 10 to 100 phr.

3. The composition according to claim 1, where the specified number is more than 10 to 400 phr.

4. The composition according to claim 1, which provides PVC product, characterized by the value shore hardness (scale A)<100.

5. The composition according to claim 1, which includes6-C20-alkyl-pyrrolidone.

6. The composition according to claim 1, which includes6-C20-cycloalkyl-pyrrolidone.

7. The composition according to claim 1, in which4-C30-alkyl-pyrrolidone is a liquid at room temperature and, optionally, can include a mixture with one or more primary and/or secondary plasticizers.

8. The composition according to claim 1, which includes a linear C8-alkyl-pyrrolidone.

9. The composition according to claim 1, which includes linear With12-alkyl-pyrrolidone.

10. The composition according to claim 7, further is part comprising a mixture of one or more primary and/or secondary plasticizers.

11. The composition according to claim 7, in which a4-C30-alkyl-pyrrolidone is a liquid at room temperature.

12. PVC product comprising the composition according to claim 1, which is in the form of a calendered sheet, plastisol, foam, dispersion, film, siding, pipe, or pipeline.

13. PVC product, including sustainable plasticized composition based on a polymer PVC, which includes4-C30-alkyl-pyrrolidone with a linear, branched or cyclic alkyl radical in an amount of from more than 10 to 400 phr (parts per 100 parts PVC), sufficient to plastifitsirovanie the specified PVC to a flexible state, and the specified PVC product is characterized by the value shore hardness (scale A)<100.

14. PVC product according to item 13, which is in the form of a calendered sheet, plastisol, foam, dispersion, film, siding, pipe, or pipeline.

15. PVC product according to item 13, where a specified number of pyrrolidone is from more than 10 to 100 phr.

16. PVC product according to item 13, which includes6-C20-alkyl-pyrrolidone.

17. PVC product according to item 13, which includes6-C20-cycloalkyl-pyrrolidone.

18. PVC product according to item 13, which includes a linear C8-alkyl-pyrrolidone.

19. PVC product according to item 13, which includes linear With12-alkyl-pyrrolidone.

 

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