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Refuse lac chain-extended modification powder and preparation method thereof

A technology of modified powder and slag glue, applied in the field of chain extension modified powder and its preparation, can solve the problems of unsuitable chain extension modification, toxicity of chain extension agent, etc., and achieve good mechanical strength, biodegradability, and reaction temperature. The effect of low, uniform cell structure

Active Publication Date: 2017-03-22
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the existing patents, the chain extender and the chain extension modification process have the following problems: (1) some chain extenders are toxic (such as multifunctional isocyanate); (2) the chain extenders are mainly some active reactive groups For macromolecular compounds, realizing its chain extension reaction requires a melt extrusion process at a higher temperature, which is not suitable for the chain extension modification of a material that is liquid at normal temperature like shellac waste slag in the present invention
At present, there are no reports related to the chain extension modified powder of lac waste slag after extracting lac jatrophic acid.

Method used

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  • Refuse lac chain-extended modification powder and preparation method thereof
  • Refuse lac chain-extended modification powder and preparation method thereof
  • Refuse lac chain-extended modification powder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1: The chain extension modified powder composition of the lac waste slag is: dehydrated lac waste slag 100g, triglycidyl isocyanurate (TGIC) 5g;

[0026] The preparation method of the above-mentioned modified powder: heat the waste lac residue at 80°C for 12 hours in a vacuum to remove the moisture in the waste lac residue to obtain the waste lac residue; take 100g of the waste lac residue and add it to the grinding Finely powdered chain extender TGIC 5g, stirred and mixed for 15 minutes to obtain a liquid mixture; heated in an oven at 100°C for 6 hours to carry out chain extension reaction, and obtained shellac waste slag rubber chain extension modified product; pulverized by tissue pulverizer After passing through a 100-mesh sieve, the shellac waste slag glue chain extension modified powder is obtained.

Embodiment 2

[0027] Example 2: The composition of the chain-extended modified powder of lac waste slag is: 100 g of dehydrated lac waste slag, 13 g of triglycidyl isocyanurate (TGIC);

[0028] The preparation method of the above-mentioned modified powder: heat the waste lac residue at 80°C for 12 hours in a vacuum to remove water to obtain the waste lac residue; take 100g of the waste lac residue and add a chain extender that is ground into a fine powder TGIC 13g, stirred and mixed for 15 minutes to obtain a liquid mixture, which was heated in an oven at 120°C for 2 hours to carry out chain extension reaction to obtain a chain extension modified product of shellac waste slag, which was pulverized by a tissue grinder and passed through a 100-mesh sieve. That is, the chain-extended modified powder of shellac waste slag is obtained.

Embodiment 3

[0029] Example 3: The chain-extended modified powder composition of the shellac waste residue is: dehydrated shellac waste residue 100g, triglycidyl isocyanurate (TGIC) 8g;

[0030] The preparation method of the above-mentioned modified powder: heat the waste lac residue at 75°C for 12 hours in a vacuum to remove the moisture in the waste lac residue to obtain the waste lac residue; take 100g of the waste lac residue and add it to the grinding Finely powdered chain extender TGIC 8g, stirred and mixed for 15 minutes to obtain a liquid mixture; heated in an oven at 110°C for 4 hours to carry out chain extension reaction, and obtained shellac waste slag rubber chain extension modified product; pulverized by tissue pulverizer After passing through a 100-mesh sieve, the shellac waste slag glue chain extension modified powder ( figure 1 , 2 ).

[0031] From figure 2 It can be seen that the lac particles have its typical purple-red particle characteristics ( figure 2 A), but th...

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Abstract

The invention discloses a refuse lac chain-extended modification powder, which comprises the following compositions in parts by weight: 100 parts of refuse dehydrated lac and 5-13 parts of multi-epoxy compound chain extending agent; by adopting macromolecular multi-functional epoxy compounds as chain extending agents, the chain extension and / or crosslinking modification reaction can be realized by performing heating reaction to carried epoxy groups with shelloic acid in the refuse lac or carboxyl and / or hydroxyl in the condensation compounds, so that the molecular weight can be increased, and further the purpose of improving the melting point of the refuse lac and increasing the relative viscosity can be achieved, the refuse lac chain-extended modification powder with the melting point ranging from 75 DEG C to 104 DEG C can be prepared, the powder can keep the dissolvability in ethanol and aqueous alkali solution while the melting point and the relative viscosity are remarkably increased, thus providing physical basis for the follow-up use of the refuse lac, and being capable of promoting the recycling of the refuse lac.

Description

technical field [0001] The invention relates to a chain-extending modified powder of lac waste slag after extraction of lac jalitic acid and a preparation method thereof, in particular to chain-extending modification of lac waste slag with small molecular polyepoxides as chain extenders. Sexual powder and its preparation method. Background technique [0002] Lac, also known as shellac, is a purple-red natural resin secreted by lac insects parasitic on the branches of some leguminous plants and sucking sap. Its main production areas are in Yunnan, Guizhou, Sichuan and other places. An important renewable resource (Huang Xijian, Tang Hui, etc., properties and applications of shellac [J], Hangzhou Chemical Industry, 2009, 39 (1); 11-15). In order to improve the utilization value of this characteristic resource, the natural lac granule glue is deeply processed in the industry to produce sheet glue, decolorized glue and bleached glue, and to extract lac pigment, lac wax and lac ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G59/04C08G59/22C08G59/24C08G59/32C08G59/62C08L29/14C08L63/00
CPCC08G59/04C08G59/22C08G59/245C08G59/3245C08G59/625C08L29/14C08L2201/06C08L2205/03C08L2203/14C08L63/00
Inventor 唐辉张晓春
Owner KUNMING UNIV OF SCI & TECH
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