Polyolefine toughening modifier and its production
A technology of toughening modifiers and modifiers, which is applied in the field of modifiers and their preparation, can solve problems such as the difficulty of adding inorganic fillers, and achieve remarkable toughening effects, strong compatibility, and good tensile strength. Effect
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Example Embodiment
[0019] The preparation method of the modifier provided by the present invention includes the following steps:
[0020] (1) Pre-mixing: Add ethylene-vinyl acetate copolymer and low-density polyethylene to a low-speed mixer with a rotation speed of 50-100 rpm, pre-mix at 20-40°C, and then slowly add cross-linking agent to mix and mix The time is preferably 5-8 minutes;
[0021] (2) Cross-linking: Add the mixed materials in step (1) to the co-rotating parallel twin-screw extruder, control the extrusion temperature of each section to 150-250℃, and the screw speed to 150-250 rpm, feeding The machine speed is 20-50 rpm to obtain cross-linked particles;
[0022] (3) Partial alcoholysis: adding cross-linked particles to an aqueous solution containing 1.0-3.0% by mass of potassium hydroxide, reacting at 50-70°C for partial alcoholysis, and controlling the degree of alcoholysis to 80-90%.
[0023] The (1) step premixing feed may further contain inorganic substances. When feeding, add ethyle...
Example Embodiment
[0037] Example 1
[0038] The partial alcoholysis cross-linked product of the present invention is prepared.
[0039] (1) Pre-mixing: Take 2100 grams of ethylene-vinyl acetate (EVA) copolymer with a content of 28.0% of vinyl acetate (VA) and a melt index of 6.2 grams / 10 minutes (produced by Beijing Organic Chemical Plant, brand EVA28-6 ), the density of 900 g is 0.923 g / cm 3 , Low-density polyethylene with a melt index of 3.1 g / 10 minutes (produced by the Plastic Factory of Qilu Petrochemical Company, brand TN26), 9 g of cross-linking agent DTBP (di-tert-butyl peroxide). First, EVA28-6 and TN26 were mixed in a low-speed mixer with a rotating speed of 60 rpm at 25°C for 3 minutes, and then DTBP was added and mixed for 8 minutes to form a mixture.
[0040](2) Cross-linking: Add the mixture of step (1) into a parallel twin-screw extruder in the same direction for granulation. The temperature distribution of the extruder is 160°C in the first zone, 180°C in th...
Example Embodiment
[0042] Example 2
[0043] Modifier B was prepared according to the method of Example 1, except that the crosslinking agent added in step (1) was 9 grams of double "2,5" vulcanizing agent [(2,5-dimethyl-2,5-di (Tert-butylperoxy)hexane]. The composition and alcoholysis degree of modifier B are shown in Table 1.
PUM
Property | Measurement | Unit |
---|---|---|
Melt index | aaaaa | aaaaa |
Granularity | aaaaa | aaaaa |
Granularity | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap