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Method for preparing flame-retardant wood-flour composite macromolecular thermoplastic resin material

A thermoplastic resin and composite polymer technology, applied in the field of composite plastic material preparation, can solve the problems of poor mechanical properties and dimensional stability, difficult filling of natural fiber materials, etc., and achieve excellent product performance, low cost and short production cycle. Effect

Inactive Publication Date: 2010-09-29
新疆科艺达铝塑制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the technical deficiencies of the existing natural fiber materials of wood-plastic composite materials, which are difficult to be highly filled, and have poor mechanical properties and dimensional stability, the purpose of the present invention is to provide a wood-fiber composite polymer thermoplastic resin material with branched chain activation. Preparation method of activated plasticized composite granular material

Method used

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  • Method for preparing flame-retardant wood-flour composite macromolecular thermoplastic resin material
  • Method for preparing flame-retardant wood-flour composite macromolecular thermoplastic resin material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] The processing steps of the preparation method are as follows, wherein the content of each component is by weight:

[0047] 1. Plasticizing pretreatment of wood fiber,

[0048] 1.1. Crushing, kneading and grinding the wood fiber into 65-mesh wood fiber powder with a moisture content of ≤2%. Wood fiber is one or a mixture of wood waste, wood chips, sawdust, rice husk, rice straw, and wheat straw.

[0049] 1.2. Put 85 parts of lignocellulosic powder obtained in step 1.1 into a stirring device, add 3 parts of sodium hydroxide with a concentration of 2%, and remove the liquid after stirring for 2 hours.

[0050] 1.3. Add 5 parts of azobisisobutyronitrile with a concentration of 0.3% to the mixture obtained in step 1.2, and stir at 65° C. for 30 minutes.

[0051] 1.4. Add 1 part of styrene and 2 parts of methyl methacrylate to the mixture obtained by heating and stirring in step 1.3, and stir at 80°C for 35 minutes.

[0052] 1.5. After cooling the mixture obtained by heat...

Embodiment 2

[0060] The processing steps of the preparation method are as follows, wherein the content of each component is by weight:

[0061] 1. Plasticizing pretreatment of wood fiber,

[0062] 1.1. Crushing, kneading and grinding the wood fiber into 200-mesh wood fiber powder with a moisture content of ≤2%.

[0063] Wood fiber is one or a mixture of wood waste, wood chips, sawdust, rice husk, rice straw, and wheat straw.

[0064] 1.2. Put 120 parts of lignocellulosic powder obtained in step 1.1 into a stirring device, add 20 parts of sodium hydroxide with a concentration of 11%, and remove the liquid after stirring for 20 hours.

[0065] 1.3. Add 65 parts of azobisisobutyronitrile with a concentration of 1.2% to the mixture obtained in step 1.2, and stir at 92° C. for 30 minutes.

[0066] 1.4. Add 1 part of styrene and 2 parts of methyl methacrylate to the mixture obtained by heating and stirring in step 1.3, and stir at 105°C for 100 minutes.

[0067] 1.5. After cooling the mixture...

Embodiment 3

[0074] The processing steps of the preparation method are as follows, wherein the content of each component is by weight:

[0075] 1. Plasticizing pretreatment of wood fiber,

[0076] 1.1. Crushing, kneading and grinding the wood fiber into 100-mesh wood fiber powder with a moisture content of ≤2%;

[0077] 1.2. Put 100 parts of lignocellulosic powder obtained in step 1.1 into a stirring device, add 9 parts of sodium hydroxide with a concentration of 4.5%, and remove the liquid after stirring for 11 hours;

[0078] 1.3. Add 25 parts of azobisisobutyronitrile with a concentration of 0.85% to the mixture obtained in step 1.2, and stir at a temperature of 79°C for 65 minutes;

[0079] 1.4. Add 3 parts of styrene and 7 parts of methyl methacrylate to the mixture obtained by heating and stirring in step 1.3, and stir at 92°C for 120 minutes;

[0080] 1.5, the mixture obtained by heating and stirring in step 1.4 is cooled to obtain plasticized pretreated wood fiber powder;

[008...

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Abstract

The invention discloses a method for preparing a flame-retardant wood-flour composite macromolecular thermoplastic resin material, which comprises the following process steps of: crushing wood fibers into wood fiber powder, mixing the wood fiber powder and sodium hydroxide for stirring, and sucking and filtering liquid out; heating and stirring the mixture obtained by the suction and filtration and azodiisobutyronitrile; adding styrene and methyl methacrylate for heating and stirring; cooling the mixture to obtain plasticized pretreated wood fiber powder; heating and mixing the plasticized pretreated wood fiber powder, magnesium hydrate, amino-terminated polyol ester, macromolecular thermoplastic resin, a stearic acid and paraffin in a high-speed mixer; and transferring the mixture into a cooling mixer for cooling, taking the mixture out and granulating the mixture in a granulator. The method has the advantages of high wood fiber filling and high mechanical performance and size stability.

Description

technical field [0001] The invention relates to a preparation method of a composite plastic material, in particular to a preparation method of a special branched chain activation modification technology for a wood fiber composite polymer thermoplastic resin particle material. Background technique [0002] At present, the common wood-plastic composite materials mainly use natural fiber materials as fillers. Due to the limitation of the process, it is difficult to achieve the purpose of high filling, so that the product is limited to a certain extent in the field of use and the characteristics of use. The chemical structure of cellulose fiber linear macromolecules is as follows: [0003] [0004] There are a large number of hydroxyl groups on the surface of wood fibers, which are very polar and easy to form hydrogen bonds and aggregate, so that wood fibers cannot be uniformly dispersed in thermoplastic materials. Pull out from the matrix resin, making the mechanical proper...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L23/12C08L27/06C08L25/06C08L97/02C08H5/04B29B9/02
Inventor 李森立
Owner 新疆科艺达铝塑制造有限公司
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