Low-VOC (volatile organic compound) low-odor polypropylene resin as well as preparation method and application thereof
A polypropylene resin, low odor technology, applied in the field of polyolefin, can solve the problems of reducing odor, limited effect, affecting material properties, etc., and achieve the effect of low VOC content, low odor, and narrow molecular weight distribution
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[0027] The present invention also provides a preparation method of low-VOC and low-odor polypropylene resin, comprising the following steps:
[0028] Step 1: In the presence of Ziegler-Natta catalyst, make propylene or propylene and C except propylene 2 -C 12 The mixture of olefins is continuously polymerized to obtain polypropylene powder;
[0029] The Ziegler-Natta catalyst contains:
[0030](i) a solid catalyst component, the solid catalyst component is obtained by using a magnesium halide and an alcohol compound as a dissolution system, using a composite electron donor as a precipitation aid, and adopting a particle molding process and an internal electron donor compounding technology Reactant;
[0031] (ii) organoaluminum compounds; and
[0032] (iii) an external electron donor; the external electron donor is selected from the general formula R n Si(OR') 4-n At least two of the silane compounds; where 01 -C 20 Alkyl, C 3 -C 20 Cycloalkyl, C 6 -C 20 Aryl or C 1...
Embodiment approach
[0035] According to a preferred embodiment of the present invention, the composite auxiliary agent includes antioxidant, acid absorbing agent and talcum powder, and the mass ratio is:
[0036] Antioxidant: acid absorbing agent: talcum powder=20:3:2-20:12:5.
[0037] The antioxidant is preferably one or more of hindered phenolic antioxidants, phosphite antioxidants and pentaerythritol ester antioxidants; more preferably, the hindered phenolic antioxidants are selected from Tetrakis(β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate) pentaerythritol ester), β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate n-octadecyl Carbon alcohol ester, calcium bis(3,5-di-tert-butyl-4-hydroxybenzylphosphonic acid monoethyl ester), N,N'-bis-(3-(3,5-di-tert-butyl-4- Hydroxyphenyl) propionyl) hexamethylenediamine, 1,3,5-three (3,5-di-tert-butyl-4-hydroxybenzyl) isocyanuric acid, the phosphite antioxidant is (2 , 4-di-tert-butylphenyl) phosphite triester, two (2,4-di-tert-butylphenol) pentaerythrito...
Embodiment 1
[0125] This example is used to illustrate the polypropylene of the present invention and its preparation method. Described polypropylene and polypropylene resin are obtained as follows:
[0126] (1) In the reactor that has been repeatedly replaced with high-purity nitrogen, add 3.150mol (300.0g) of anhydrous magnesium chloride, 19.68mol (2.1L) of toluene, and 8.4mol (1.1L) of 2-ethylhexanol in sequence , under the conditions of a stirring speed of 450rpm and a temperature of 110°C, the reaction was carried out for 3.0 hours to obtain a stable and uniform alcoholate solution;
[0127] (2) Add 3,5-heptanediol dibenzoate 48mmol (24ml), diisobutyl phthalate 336mmol (90ml) and tetrabutyl titanate 132mmol (45ml) to the above alcoholate solution , stirred for 60 minutes, cooled to room temperature to obtain a homogeneous solution; the above homogeneous solution was added to fully replaced by nitrogen, and equipped with 60mol (6.6L) of titanium tetrachloride and 11.4mol (1.2L) of tol...
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