Preparation method of wet curing reaction-type polyurethane hot melt adhesive for textile

A polyurethane hot-melt adhesive, moisture-curing technology, used in textiles and papermaking, polyurea/polyurethane adhesives, adhesives, etc., can solve the problems of poor hydrolysis resistance, poor flexibility, low initial and final adhesive strengths, etc. To achieve the effect of good hydrolysis resistance, good water resistance, good initial tack and final tack strength

Active Publication Date: 2014-01-08
KUNSHAN TIANYANG HOT MELT ADHESIVE CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The all-polyether polyurethane hot-melt adhesive has the advantages of low melt viscosity, good melt viscosity stability, good water resistance, and low cost, but the initial and final bond strengths are low; while the all-polyester polyurethane hot-melt adhesive Adhesives have good initial and final bond strengths, but poor hydrolysis resistance and poor flexibility

Method used

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  • Preparation method of wet curing reaction-type polyurethane hot melt adhesive for textile

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Put 51g of polyether polyol 4000E, 8g of polyester polyol 3000H, 8g of ester polyol 2000N, 0.22g of antioxidant 1010 and 0.22g of antioxidant 1076 into a three-necked flask, stir and mix and heat up to 120 At about ℃, dehydration for 0.5h under vacuum less than 100Pa;

[0022] (2) Add 20g of tackifying resin into the above flask, continue to heat up to 135-140°C, and dehydrate for 1.5h at a vacuum degree of less than 100Pa;

[0023] (3) Cool down to 87°C, add 12g MDI, 0.07 stannous octoate and 0.07g DMDEE, stir, and react for 2 hours at 85-95°C, vacuum degree less than 100Pa;

[0024] (4) Release the vacuum, add 0.5g of white carbon black, stir quickly, mix well, and continue to stir for 10min under a vacuum degree of less than 100Pa;

[0025] (5) Keep the discharge temperature at 85-100°C, discharge quickly, seal in an aluminum foil bag under nitrogen protection, and mature in an oven at 80-85°C for 4 hours to obtain product A.

Embodiment 2

[0027] (1) Put 46g of polyether polyol 4000E, 10g of polyester polyol 3000H, 10g of ester polyol 2000N, 0.22g of antioxidant 1010 and 0.22g of antioxidant 1076 into a three-necked flask, stir and mix and heat up to 120 At about ℃, dehydration for 0.5h under vacuum less than 100Pa;

[0028] (2) Add 19g of tackifying resin into the above flask, continue to heat up to 135-140°C, and dehydrate for 1.5h at a vacuum degree of less than 100Pa;

[0029] (3) Cool down to 87°C, add 12g MDI, 0.07 stannous octoate and 0.07g DMDEE, stir, and react for 2 hours at 85-95°C, vacuum degree less than 100Pa;

[0030] (4) Release the vacuum, add 0.5g of white carbon black, stir quickly, mix well, and continue to stir for 10min under a vacuum degree of less than 100Pa;

[0031] (5) Keep the discharge temperature at 85-100°C, quickly discharge, seal in an aluminum foil bag under nitrogen protection, and mature in an oven at 80-85°C for 4 hours to obtain product B.

Embodiment 3

[0033] (1) Put 44g of polyether polyol 4000E, 11g of polyester polyol 3000H, 11g of ester polyol 2000N, 0.22g of antioxidant 1010 and 0.22g of antioxidant 1076 into a three-necked flask, stir and mix and heat up to 120 At about ℃, dehydration for 0.5h under vacuum less than 100Pa;

[0034] (2) Add 19g of tackifying resin into the above flask, continue to heat up to 135-140°C, and dehydrate for 1.5h at a vacuum degree of less than 100Pa;

[0035] (3) Cool down to 87°C, add 11g MDI, 0.07 stannous octoate and 0.07g DMDEE, stir, and react for 2 hours at 85-95°C, vacuum degree less than 100Pa;

[0036] (4) Release the vacuum, add 0.5g of white carbon black, stir quickly, mix well, and continue to stir for 10min under a vacuum degree of less than 100Pa;

[0037] (5) Keep the discharge temperature at 85-100°C, discharge quickly, seal in an aluminum foil bag under nitrogen protection, and mature in an oven at 80-85°C for 4 hours to obtain product C.

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Abstract

The invention discloses a preparation method of a wet curing reaction-type polyurethane hot melt adhesive for a textile. The preparation method mainly comprises the following steps: (1) stirring and mixing polyether polyol 4000E, polyether polyol 3000H and an antioxidant, heating and warming to about 120 DEG C, dewatering for 0.5 hour when the vacuum degree is smaller than 100Pa; (2) adding a tackifying resin, continuing to warm to 135-140 DEG C, dewatering for 1.5 hours when the vacuum degree is smaller than 100Pa; (3) cooling to 87 DEG C, adding 4,4'-diphenyl methane diisocyanate and a catalyst, stirring and reacting for 2 hours when the vacuum degree is smaller than 100Pa; (4) relieving a vacuum state, adding white carbon black, quickly stirring and evenly mixing, and continuing to stir for 10 minutes when the vacuum degree is smaller than 100Pa; and (5) keeping the discharge temperature at 85-100 DEG C, quickly discharging and encapsulating, and then curing for 4 hours under the condition of 80-85 DEG C, so as to obtain a target product. The product is applied to compounding of the textile, and has excellent peel strength, short opening time, good hydrolysis resistance and good storage stability.

Description

technical field [0001] The invention relates to a method for preparing a moisture-curing reactive polyurethane hot-melt adhesive for textile compounding. Background technique [0002] Hot melt adhesives are gaining more and more attention because of their fast bonding, non-polluting, non-toxic, low volatile organic compounds (VOC) and other characteristics. Traditional hot-melt adhesives generally use thermoplastic resin as the main component. Although they can quickly cure and bond, the adhesive layer after curing is not resistant to high temperatures and is easily soluble in organic solvents. The bonding strength is not high, so the use of thermoplastic hot-melt adhesives restricted. In order to overcome the above shortcomings, a new type of moisture-curing polyurethane hot-melt adhesive has been developed. This type of hot-melt adhesive not only has the advantages of high initial viscosity and fast curing and positioning of traditional hot-melt adhesives, but also after ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/06C09J175/08C09J11/04C09J11/06C09J11/08C08G18/76C08G18/48C08G18/42
CPCC09J175/06C08G18/165C08G18/2081C08G18/244C08G18/4018C08G18/4202C09J175/04D06M17/10D06N3/146D06M2101/06C08G18/4825C08G18/7671C08G18/4238C08G2170/20C09J175/08C08K3/04C08K5/005C08G18/12C08G18/307C08K3/014D06M2101/32
Inventor 李哲龙朱万育肖虎鹏马洪伟曾作祥沈艳
Owner KUNSHAN TIANYANG HOT MELT ADHESIVE CO LTD
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