Extrusion grade polymethyl methacrylate composition and preparation method

Abstract

The invention relates to an extrusion grade polymethyl methacrylate composition with high gloss and high impact strength and a preparation method. The polymethyl methacrylate composition comprises the following components in percentage by weight: 30%-50% of acrylic rubber elastomers, 40%-69.5% of polymethyl methacrylate PMMA, 0.4%-2% of pentaerythritol tetrastearate, and 0.1%-0.5% of micronized ester wax. The extrusion grade polymethyl methacrylate composition, disclosed by the invention, is suitable for an extrusion technology, achieves specular high light, and has relatively high shock resistant characteristics.

Description

【Technical field】 [0001] The invention relates to a polymethyl methacrylate composition, in particular to a copolyacrylate composition exhibiting specular high gloss and high impact strength in an extrusion process and a preparation method thereof. 【Background technique】 [0002] With the improvement of individual requirements in the construction industry and the continuous development of the building materials market, the brilliant colors of the colored co-extruded PMMA (polymethyl methacrylate composition for short) plastic-steel door and window profiles are more and more popular among people. mainstream trend. [0003] The technical process of color co-extruded PMMA is becoming more and more mature. Because of its rich colors and excellent weather resistance, it has become one of the main applications of plastic-steel door and window profiles. The traditional process currently on the market: conventional PMMA materials are co-extruded on the surface of the profile. It is...

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Problems solved by technology

[0004] However, this traditional process and the PMMA material itself have the following disadvantages: 1. There are obvious linear scratches on the PMMA surface after polishing, which will affect the appearance if it is very obvious at close range.

2. The surface of the polished PMMA profile is prone to electrostatic adsorption of dust

3. After planing, the adhesion between the PMMA surface and the packaging adhesive sheet is enhanced, and the adhesiveness of the adhesive sheet can easily lead to residual glue marks on the surface of the profile

4. At present, the toughness of the conventional PMMA material itself is not good, and the co-extrusion surface layer of the profile is easy to "white" when it is mechanically cut. The reason is that the co-extrusion layer PMMA is too brittle and easy to crack and fall off.

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