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A kind of method that prepares hot-melt adhesive by lac waste slag glue and waste polyester

A technology of waste polyester and waste slag, which is applied in the direction of adhesives, etc., can solve the problems of long preparation process, waste of resources, and increased costs, and achieve the effects of reducing manufacturing costs, improving fluidity, and reducing emissions

Active Publication Date: 2020-11-17
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problems of this method are: (1) the preparation process is long; (2) more dibasic acid and modified polyether are needed to lower the melting point of the hot melt adhesive, and about 40 % by mass of dibasic acid and about 20% by mass of modified polyether; (3) The use of modified polyether leads to a higher viscosity of the hot melt adhesive, making the coating operation difficult and increasing the cost
CN107163892A discloses a preparation method for producing polyester hot-melt adhesive by using PET waste. This method still adopts three-stage process, and the melting point of the obtained hot-melt adhesive can be reduced to 118∼125°C, but the preparation process is still long and requires Use of expensive special dibasic acids and glycols such as sebacic acid, diethylene glycol, 1,6-cyclohexanedimethanol and polyethylene glycol
The current production enterprises generally burn it as fuel, which causes a lot of waste of resources and has a great impact on the comprehensive benefits of shellac processing enterprises.

Method used

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  • A kind of method that prepares hot-melt adhesive by lac waste slag glue and waste polyester
  • A kind of method that prepares hot-melt adhesive by lac waste slag glue and waste polyester
  • A kind of method that prepares hot-melt adhesive by lac waste slag glue and waste polyester

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Gum lac and discarding waste slag preparation polyester hot-melt adhesive, a raw material which comprises: dehydrating waste slag shellac gum 20g, waste PET 100g, 20g of ethylene glycol (ethylene glycol / polyester waste is 0.6 molar ratio), zinc acetate 0.7g, glycidyl ester of polymerized rosin, 10g, glycidyl ester of rosin 15g, tackifying resins 13.2g [(3) ~ (4) step 8% of the total feeding amount], light calcium carbonate 13.2g [(3) - step (4) the total feeding amount of 8%], antioxidant 1010 0.33g [(3) ~ (4) step total feeding amount of 0.2%]. Preparation of Hot Melt specific steps are as follows:

[0060] Preparation of (1) dehydration of waste slag shellac gum

[0061] Extracted from the gum or shellac particles shellac gum production line made aleuritic acid residue discarded gum shellac, a vacuum oven at 85 ℃ 8h remove water and dried in vacuo to prepare a dehydrated waste slag shellac gum, referred to as WS. Black viscous liquid at room temperature (melting point l...

Embodiment 2

[0074] Gum lac and discarding waste slag preparation polyester hot-melt adhesive, a raw material which comprises: dehydrating waste slag shellac gum 50g, waste PET 100g, 30g of ethylene glycol (ethylene glycol / polyester waste is 0.9 molar ratio), manganese acetate 1.2g, 13g glycidyl ester of polymerized rosin, rosin glycidyl 7g, tackifying resins 20.1g [(3) ~ (4) step total feeding amount of 10%], light calcium carbonate 20.1g [(3) - step (4) the total feeding amount of 10%], antioxidant 0.80g [(3) ~ (4) step total feeding amount of 0.4%].

[0075] Specifically Step 1, except that the same Example:

[0076] Step (1) was dried in vacuo at 78 deg.] C 12h;

[0077] Step (4) the grafting of CPC / coupling reaction temperature was 180 ℃, the reaction time is 2H;

[0078] Step (5) The mixture was poured into hot water of 40 ℃.

[0079] The hot melt adhesive was measured softening point of 112 ℃, MFR of 31g / 10min, the shear strength of 5.1MPa.

Embodiment 3

[0081] Gum lac and discarding waste slag preparation polyester hot-melt adhesive, a raw material which comprises: dehydrating waste slag shellac gum 70g, waste PET 100g, 4Og glycol (ethylene glycol / polyester waste is 1.2 molar ratio), zinc acetate 1.0g, glycidyl ester of polymerized rosin, 16g, glycidyl ester of rosin 10g, tackifying resins 28.4g [(3) ~ (4) step total feeding amount of 12%], light calcium carbonate 28.4g [(3) - step (4) the total feeding amount of 12%], antioxidant 1.42g [(3) ~ (4) step total feeding amount of 0.6%].

[0082] Specifically Step 1, except that the same Example:

[0083] Step (1) was dried in vacuo for 16h 70 ℃;

[0084] Step (4) the grafting of CPC / coupling reaction temperature was 170 ℃, the reaction time is 3H;

[0085] Step (5) The mixture was poured into hot water of 50 deg.] C.

[0086] The hot melt adhesive was measured softening point of 106 ℃, MFR of 35g / 10min, the shear strength of 5.6MPa.

[0087] Wherein the step of black viscous liqu...

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Abstract

The invention discloses a method for preparing hot melt adhesive from lac waste residue glue and waste polyester. The method comprises the following steps: (1) treating the ac waste residue glue; (2)treating the waste polyester; (3) performing alcoholysis reaction on the waste polyester and diol; (4) performing co-grafting / coupling reaction on the waste polyester alcoholysis product, the lac waste residue glue, polymerized rosin glycidyl ester and glycidyl rosin; and (5) adding other additives, mixing and discharging. According to the prepared hot melt adhesive, the softening point is between99 and 120 DEG C, MFR is between 20 and 44 g / 10min and the shear strength is between 4.6 and 5.6 MPa; and the hot melt adhesive has a low melting point, high flowability and high bonding strength andcan meet the use requirement on hot bonding of materials such as wood, and the like.

Description

Technical field [0001] The present invention relates to a method of preparing hot melt glue from a purple polyester, particularly with low softening points and high fluidity, suitable for wood and carton hot melt bonding. And the method of preparing a hot melt glue, belonging to the abutment of the polyester. Background technique [0002] The hot melt glue is heated, and the adhesive that achieves bonding is quickly solidified at room temperature. Since it does not contain any solvent, non-toxic, odorless, non-polluted environment, is known as "green adhesive", and thus has a wide range of applications in all walks of life. The polyester hot melt adhesive appeared in the 1960s, polyester for hot melt glue is a saturated polyester resin, which has a certain crystallinity, rigidity, and toughness, excellent electrical energy, water resistance, heat resistance. , Cold-resistant and medium resistance, and high viscosity, bonding a variety of materials, widely used in clothing, automo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G81/00C09J187/00
CPCC08G81/00C09J187/00
Inventor 唐辉朱漫白张晓春
Owner KUNMING UNIV OF SCI & TECH
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