MAA/AN copolymer polyfoam and preparation method thereof

A technology of foamed plastics and copolymers, applied in the field of foamed plastics, can solve the problems of poor thickness of MAA/AN copolymer foamed plastics, and achieve the effects of easy control of polymerization, uniform polymerization rate, and low cost

Active Publication Date: 2014-02-05
威海维赛新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] In order to overcome the deficiencies in the thickness difference of the MAA / AN copolymer foam plastic prepared by the existing preparation method, the invention provides a kind of MAA / AN copolymer foam plastic

Method used

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  • MAA/AN copolymer polyfoam and preparation method thereof
  • MAA/AN copolymer polyfoam and preparation method thereof
  • MAA/AN copolymer polyfoam and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Example 1: The formula components are composed according to the following weight ratio: 42 parts of methacrylic acid, 58 parts of acrylonitrile, 0.04 part of azobisisobutyronitrile, 0.08 part of azobisisoheptanonitrile, 0.10 part of tert-butyl perbenzoate Esters, 2.0 parts of acrylamide, 4.0 parts of formamide, 2.0 parts of n-butanol, 0.5 parts of urea, 0.1 parts of n-dodecyl mercaptan. Configure the raw material solution according to the formula components, pour the raw material solution into a mold made of two flat inorganic glasses and rubber sealing rings, the distance between the glasses is 15mm, and the outside of the glass mold is clamped by a clamp; the raw material solution will be filled Put the glass mold into a strong circulating water bath device for polymerization. Polymerization conditions: water temperature 46°C for 30-40 minutes. When the reaction system turns from transparent to turbid, quickly lower the water temperature to 38°C and continue the reacti...

Embodiment 2

[0058] Embodiment 2: The formulation components are the same as in Embodiment 1, and the distance between two flat inorganic glasses is 20mm. In this case, the polymerization conditions are: water temperature 46°C for 50-70 minutes, when the reaction system turns from transparent to turbid, quickly lower the water temperature to 35.5°C, then raise the temperature to 37°C after 6 hours and continue the reaction for 60 hours. The copolymer sheet that makes can be foamed according to embodiment 1, and the thickness of foam plate is 40~60mm, and density is 40~100kg / m 3 .

Embodiment 3

[0059] Example 3: The formula components are composed according to the following weight ratio: 42 parts of methacrylic acid, 58 parts of acrylonitrile, 0.16 part of azobisisobutyronitrile, 0.08 part of azobisisoheptanonitrile, 0.08 part of tert-butyl perbenzoate Esters, 2.0 parts of acrylamide, 4.0 parts of formamide, 2.0 parts of n-butanol, 0.5 parts of urea, 0.1 parts of n-dodecyl mercaptan. Configure the raw material solution according to the formula components, pour the raw material solution into a mold made of two flat inorganic glasses and rubber sealing rings, the distance between the glasses is 15mm, and the outside of the glass mold is clamped by a clamp; the raw material solution will be filled The glass mold was placed in a strong circulating water bath device for polymerization to form a hard and transparent copolymer sheet. The polymerization reaction time was 48 hours, and the water temperature was 48°C. Freely foam the foamable MAA / AN copolymer sheet obtained in...

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Abstract

The invention discloses an MAA (Methyl Acrylic Acid) / AN (Acrylic Nitrile) copolymer polyfoam, and also discloses a preparation method of the MAA / AN copolymer polyfoam to solve the technical problem that MAA / AN copolymer polyfoam prepared in methods of the prior art is not thick enough. In the technical scheme, monomer MAA, AN, foaming agent, cross-linking agent and compound initiator are taken as basic materials. By utilizing a compensation effect of various half life periods of the compound initiator, the numbers of active centers generated by the initiator in different polymerization phases are slightly different, the polymerization rate thereby tends to be uniform and accordingly the polymerization becomes easy to control. At the same time, the polymerization rate is adjusted by a gradient temperature compensation method in the polymerization process, thus, an MAA / AN copolymer board prepared in the method is thickened to 35 mm from 15 mm in the background art; the MAA / AN copolymer polyfoam prepared in the method is thickened to 90 mm from 80 mm in the background art. And the preparation cost is reduced.

Description

technical field [0001] The present invention relates to a foam, especially a MAA / AN copolymer foam. It also relates to a process for the preparation of such MAA / AN copolymer foams. Background technique [0002] Document 1 "Chinese Patent No. ZL200610091394.1" discloses a MAA / AN copolymer foam and its preparation method. The formula components of the MAA / AN copolymer foam are polymerized and foamed according to the following weight ratios into: [0003] Monomer 1: Methacrylic acid (MAA) 42~62 [0004] Monomer 2: Acrylonitrile (AN) 58~38 [0005] Initiator: Azobisisobutyronitrile (AIBN) 0.18~0.40 [0006] Crosslinking agent: acrylamide (AM) or methacrylamide (MAM) 1.3~3.5 [0007] Foaming agent: formamide or propylene glycol or pentanol or hexanol 2.0~8.0 [0008] Nucleating agent: urea 0.3~1.3 [0009] According to the preparation method disclosed in the "Chinese Patent No. ZL200610091394.1", only MAA / AN foamable copolymer boards with a thickness of less than 15mm can ...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): C08F220/48C08F220/06C08F220/56C08F4/04C08F4/34C08F2/38C08J9/04
Inventor张广成刘良威陈挺
Owner威海维赛新材料科技有限公司