Unlock instant, AI-driven research and patent intelligence for your innovation.

Manufacturing method of (meth)acrylic acid polymer

A technology of acrylic series and production method, which is applied in the field of production of acrylic polymers, and can solve problems such as deviations in physical properties of acrylic polymers

Active Publication Date: 2008-02-06
MITSUBISHI CHEM CORP
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in these methods, during continuous operation for a long period of time, there is a problem that the physical properties of the produced (meth)acrylic polymer vary slightly due to slight deviations in some of the polymerization conditions.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] In a tank-type reactor equipped with a stirring device, the two components of the main raw material component and the adjustment component were supplied in the following proportion, and the polymerization temperature was set at 135° C. and the average residence time was 3 hours, and the polymerization reaction was performed.

[0062]

[0063] 97.559 parts by mass of methyl methacrylate (MMA)

[0064] 1.991 parts by mass of methyl acrylate (MA)

[0065] 0.200 parts by mass of n-octylmercaptan

[0066] .tert-butylperoxy-3,5,5-trimethylhexanoate

[0067] (to the total amount of MMA and MA) 70 mass ppm

[0068]

[0069] 0.441 parts by mass of methyl methacrylate (MMA)

[0070] 0.009 parts by mass of methyl acrylate (MA)

[0071] 0.050 parts by mass of n-octylmercaptan

[0072] · tert-butylperoxy-3,5,5-trimethylhexanoate

[0073] (to the total amount of MMA and MA) 70 mass ppm

[0074] In addition, within the necessary amount of n-octyl mercaptan, 80% by mass is b...

Embodiment 2

[0092] The polymerization reaction was performed in the same manner as in Example 1 except that the main raw material components and adjustment components were changed as follows.

[0093]

[0094] 94.829 parts by mass of methyl methacrylate

[0095] 4.991 parts by mass of methyl acrylate

[0096] 0.150 parts by mass of n-octylmercaptan

[0097] · tert-butylperoxy-3,5,5-trimethylhexanoate

[0098] (to the total amount of MMA and MA) 60 mass ppm

[0099]

[0100] 0.171 parts by mass of methyl methacrylate

[0101] 0.009 parts by mass of methyl acrylate

[0102] 0.020 parts by mass of n-octylmercaptan

[0103] · tert-butylperoxy-3,5,5-trimethylhexanoate

[0104] (to the total amount of MMA and MA) 60 mass ppm

[0105] In addition, within the necessary amount of n-octyl mercaptan, 88% by mass was blended in the main raw material component, and 12% by mass was blended in the adjustment component. In addition, the concentration of n-octyl mercaptan in the main raw mater...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

Provided is a method for manufacturing a (meth)acrylate polymer with little fluctuations in properties. This method for manufacturing a (meth)acrylate polymer comprises a step of continuously supplying a raw material composition containing a (meth)acrylate monomer, radical polymerization initiator and chain transfer agent to a polymerization vessel, a step of making a reaction mixture comprising a (meth)acrylate polymer obtained by polymerizing at least part of the (meth)acrylate monomer, and a step of taking out the reaction mixture continuously from the polymerization vessel, and devolatilizing to form the (meth)acrylate polymer, wherein the raw material composition comprises at least two components of an adjusting component containing at least part of the chain transfer agent and a main raw material component other than the adjusting component, the method further comprising a step of measuring one or more properties of the at least part of the (meth)acrylate polymer, and a step of adjusting the supply amount of the adjusting component into the polymerization vessel, based on the physical properties.

Description

technical field [0001] The present invention relates to a method for producing a (meth)acrylic polymer by a continuous polymerization method. Background technique [0002] Polymethyl methacrylate (PMMA) and other (meth)acrylic polymers produced by polymerizing (meth)acrylic monomers such as methyl methacrylate have excellent transparency, weather resistance, and appearance, and are used in lighting , advertising boards, vehicles and many other fields. In addition, it is also widely used in optical applications such as optical lenses, disk substrates, and plastic optical fibers. [0003] Suspension polymerization is generally used as a method for producing (meth)acrylic polymers, but since additives such as suspending and dispersing agents are mixed into (meth)acrylic polymers, the transparency decreases, making it unsuitable for optical purposes. In addition, filtration, washing, and drying and complicated steps are required, resulting in poor productivity. [0004] As a...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C08F20/04C08F2/38C08F2/00C08F20/00
Inventor 德井正树石坂浩二
Owner MITSUBISHI CHEM CORP