Super-thick polymethacrylimide foamed plastic and preparation method thereof

A polymethacrylimide and methacrylamide technology, which is applied in the field of foam plastics, can solve the problems of complete detection of defects in PMI foam bonding detection, and achieve the effect of shortening the polymerization reaction time and ensuring good performance.

Pending Publication Date: 2022-05-17
HAOBO FUJIAN NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing non-destructive testing methods are still unable to fully detect defects in the detection of large-thickness PMI foam bonding.
For users, there are still certain risks

Method used

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  • Super-thick polymethacrylimide foamed plastic and preparation method thereof
  • Super-thick polymethacrylimide foamed plastic and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～5

[0028] A kind of ultra-thick polymethacrylimide foam plastic and preparation method thereof

[0029] The parts by weight of raw materials for preparing the ultra-thick polymethacrylimide foam are: 50 parts of methacrylonitrile, 50 parts of methacrylic acid, 5 parts of the third comonomer, 2.5 parts of initiator, 10 parts of blowing agent part, 5 parts of cross-linking agent, 5 parts of special auxiliary agent for super thick PMI preparation; the third comonomer is methyl methacrylate; the initiator is tert-butyl peroxybenzoate; the blowing agent It is isopropanol; the cross-linking agent is zinc methacrylate.

[0030] The selection of special additives for the preparation of ultra-thick PMI in Examples 1-5 is shown in Table 1, which are marked as Examples 1-5 respectively.

[0031] The preparation method of ultra-thick polymethacrylimide foamed plastics, comprises the following steps:

[0032] (1) Ingredients: add methacrylonitrile, methacrylic acid, the third comonomer, ini...

Embodiment 6

[0039] A kind of ultra-thick polymethacrylimide foam plastic and preparation method thereof

[0040] The parts by weight of raw materials for preparing the ultra-thick polymethacrylimide foam are: 1 part of methacrylonitrile, 1 part of methacrylic acid, 0.1 part of initiator, 0.1 part of foaming agent, 0.1 part of crosslinking agent, 0.1 part of special auxiliary agent for super thick PMI preparation; the initiator is mixed with azobisisobutyronitrile and dibenzoyl peroxide in a weight ratio of 1:2; the foaming agent is glycerol, isobutanol and Mixed at a weight ratio of 1:1; the crosslinking agent is methacrylamide, magnesium oxide, and calcium oxide mixed at a weight ratio of 10:2:3; the special auxiliary agent for the preparation of ultra-thick PMI is polypropylene glycol.

[0041]The preparation method of ultra-thick polymethacrylimide foamed plastics, comprises the following steps:

[0042] (1) Ingredients: Add methacrylonitrile, methacrylic acid, initiator, foaming agen...

Embodiment 7

[0047] A kind of ultra-thick polymethacrylimide foam plastic and preparation method thereof

[0048] The weight parts of raw materials for preparing the ultra-thick polymethacrylimide foam are: 100 parts of methacrylonitrile, 100 parts of methacrylic acid, 10 parts of the third comonomer, 10 parts of initiator, and 20 parts of blowing agent 10 parts, 10 parts of cross-linking agent, 10 parts of super-thick PMI preparation special auxiliary agent; The third comonomer is butyl methacrylate, tert-butyl methacrylate, N,N-dimethylacrylamide Ratio 10:3:5 mixing; The initiator is dibenzoyl peroxide lauroyl peroxide, tert-butyl peroxybenzoate, tert-butyl peroxide 2-ethylhexanoate, two (4-tert-butyl cyclo Hexyl ester) peroxydicarbonate is mixed with weight ratio 1:1:1:1; Described blowing agent is formamide, ethylene glycol, hexane, octane, isooctane with weight ratio 10:2:2 : 1:2 mixing; the cross-linking agent is zinc methacrylamide methacrylate, tripropylene glycol diacrylamide, ma...

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Abstract

The invention discloses super-thick polymethacrylimide foamed plastic and a preparation method thereof. The super-thick polymethacrylimide foamed plastic is prepared from the following raw materials in parts by weight: 1-100 parts of methacrylonitrile, 1-100 parts of methacrylic acid, 0-10 parts of a third comonomer, 0.1-10 parts of an initiator, 0.1-20 parts of a foaming agent, 0.1-10 parts of a cross-linking agent and 0.1-10 parts of a special additive for preparing super-thick PMI. According to the main principle, a transparent super-thick PMI copolymerization plate is prepared through bulk polymerization, then the super-thick PMI copolymerization plate is foamed at the high temperature to obtain the super-thick PMI foamed plastic, and the main technical scheme is that the polymerization reaction time is shortened by adding a special additive for super-thick PMI preparation, and the original good performance is guaranteed.

Description

technical field [0001] The invention relates to the technical field of foamed plastics, in particular to an ultra-thick polymethacrylimide foamed plastic and a preparation method thereof. Background technique [0002] PMI foam is a closed-cell cross-linked rigid foam with excellent mechanical properties, high creep resistance, high heat distortion temperature and easy processing, making PMI foam resistant to Higher curing process. [0003] At present, the preparation method adopted by most PMI foams (such as patents CN 104610562A, CN 105111354 A, DE-C2726260, CN110746633 A, CN 110256794A, etc.) is basically as follows: with methacrylic acid, methacrylonitrile, the third comonomer as The matrix is ​​added with additives such as initiators, foaming agents, and crosslinking agents to form resin polymer plates through polymerization; the polymer plates are foamed at high temperatures to form PMI foam. However, the thickness of the foam prepared by the above method generally do...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/46C08F220/06C08F220/56C08F222/38C08F2/02C08F2/44C08K3/22C08J5/18C08J9/14C08L33/20C08L33/02
CPCC08F220/46C08F220/06C08F2/02C08F2/44C08K3/22C08J5/18C08J9/142C08J9/141C08K2003/222C08K2003/2206C08J2203/12C08J2203/182C08J2203/14C08J2333/20C08J2333/02C08F220/56C08F222/385
Inventor 丁凯军丁友家李德福曾泽群
Owner HAOBO FUJIAN NEW MATERIAL TECH
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