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Preparation method of nuclear shell water-based polyurethane-acrylate composite emulsion adhesive for polyolefin film composition

An acrylate, core-shell water-based technology, applied in the direction of graft polymer adhesives, ester copolymer adhesives, hydrocarbon copolymer adhesives, etc., can solve the problem of reducing joint bonding strength and cohesive bonding performance Insufficient, poor adhesion and other problems, to achieve the effect of reducing VOC content, increasing cohesive energy, and increasing the degree of crosslinking

Active Publication Date: 2012-06-13
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Polyolefin is a non-polar material, and its surface does not have the conditions to form orientation force and induction force, and can only form weak dispersion force, so the adhesion performance is poor
④Polyolefin resin itself contains low molecular weight substances and additives added during processing (such as slip agent, antistatic agent, etc.), such small molecular substances are very easy to precipitate and gather on the surface of the resin, forming a very low strength The weak interface layer, the existence of this weak boundary layer greatly reduces the bonding strength of the joint
However, for difficult-to-bond materials such as PP, PET, PE, etc., due to the low strength of its own chemical bonds, the cohesive bonding performance between molecules is not enough.

Method used

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  • Preparation method of nuclear shell water-based polyurethane-acrylate composite emulsion adhesive for polyolefin film composition
  • Preparation method of nuclear shell water-based polyurethane-acrylate composite emulsion adhesive for polyolefin film composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] 1) Preparation of vinyl-terminated network polyurethane emulsion

[0052] Put 100 parts of PPG (molecular weight: 2000) into a three-necked flask, dehydrate in vacuum at 100°C for 2 hours; cool down to 80°C, add 3.01 parts of NPG, 1.53 parts of TMP and 59.3 parts of IPDI, and keep the temperature at 85°C for 3 hours; wait for the reaction liquid to cool to 75°C Then add 9.86 parts of DMPA and 10 parts of co-solvent NMP, and keep it warm for 2 hours at 80°C; after cooling down to 65°C, add 10.96 parts of HEMA and 0.1 part of DBTDL, and keep it warm for 1.5 hours; Then add 7.4 parts of TEA and stir for 5 minutes, and then add 370 parts of deionized water under high-speed stirring to disperse into an emulsion. After 10-15 minutes, slowly add 1.74 parts of hydrazine hydrate, 0.87 parts of DETA and 10 parts of deionized water to extend the chain, 50 Cake for 1 hour to obtain vinyl-terminated reticular polyurethane emulsion;

[0053] 2) Preparation of core layer polyurethane...

Embodiment 2

[0058] 1) Preparation of vinyl-terminated network polyurethane

[0059] Put 100 parts of PTMG (molecular weight: 2000) into a three-neck flask, dehydrate in vacuum at 100°C for 2 hours; cool down to 80°C, add 3.01 parts of NPG, 1.53 parts of TMP and 46.3 parts of TDI, keep the reaction at 85°C for 3 hours; add DMPA9 after cooling down to 75°C .86 parts and co-solvent NMP10 parts, 80 ℃ insulation reaction for 2 hours; after cooling down to 65 ℃, add 10.96 parts of HEMA and 0.15 parts of DBTDL, heat preservation reaction for 1.5 hours; after the reaction, cool down to 40 ℃, add 25 parts of BA to reduce viscosity, and then add TEA7 .4 parts were stirred for 5 minutes, then 370 parts of deionized water was added under high-speed stirring to disperse into an emulsion, and after 10-15 minutes, slowly added 4 parts of ADH, 0.87 parts of DETA and 10 parts of deionized water to extend the chain, and aged at 50°C for 1 hour. Promptly obtain the vinyl-terminated reticular polyurethane em...

Embodiment 3

[0065] 1) Preparation of vinyl-terminated network polyurethane

[0066] Put 100 parts of PCL (molecular weight: 2000) into a three-neck flask, dehydrate in vacuum at 100°C for 2 hours; add 3.01 parts of NPG, 1.53 parts of TMP and 59.1 parts of IPDI after cooling down to 80°C, and keep the reaction for 3 hours at 85°C; add DMPA9 after cooling down to 75°C .86 parts and 10 parts of co-solvent NMP, heat preservation reaction at 80°C for 2 hours; after cooling to 65°C, add 12 parts of HPMA and 0.15 parts of DBTDL, heat preservation reaction for 1.5 hours; after the reaction, cool down to 40°C, add 25 parts of BA to reduce viscosity, and then add TEA7 Stir 4 parts for 5 minutes, then add 370 parts of deionized water under high-speed stirring to disperse into an emulsion. After 10-15 minutes, slowly add 1.74 parts of hydrazine hydrate, 0.87 parts of DETA and 20 parts of deionized water to extend the chain, and mature at 50 ° C for 1 hour , That is, a vinyl-terminated network polyure...

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PUM

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Abstract

The invention discloses a preparation method of a core-shell water-based polyurethane-acrylate composite emulsion adhesive for polyolefin film lamination. The preparation method comprises: preparation of a vinyl-terminated net-shaped polyurethane emulsion, preparation of a core layer polyurethane-acrylate interpenetrating network polymer and preparation of the core-shell polyurethane-acrylate composite emulsion adhesive. By using the method, the defects that the existing water-based laminating glue product is low in adhering strength, poor in water tolerance and low in drying speed are solved. The adhesive prepared by using the method has the advantages of high peeling strength, good water tolerance, high drying speed and low VOC (volatile organic compound) content and the like.

Description

1. Technical field [0001] The invention relates to a preparation method of an adhesive for polyolefin film compounding, in particular to a preparation method of a core-shell water-based polyurethane-acrylate composite emulsion adhesive for polyolefin film compounding. 2. Background technology [0002] Polyolefin materials, including polypropylene (PP) and polyethylene (PE), have the characteristics of high mechanical strength, good chemical stability, excellent heat resistance and low price, and their films, sheets and other products are widely used in industrial fields and in everyday life. However, the surface of polyolefin materials is chemically inert and is a difficult-to-bond material. It is difficult to bond with adhesives or conventional bonding methods, so it has become a major problem in the processing and application of plastic manufacturing. The main reasons for the difficulty of polyolefin sticking are: ①The surface free energy of polyolefin materials is low (a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J151/08C09J133/12C09J133/08C09J125/14C08G18/67C08F290/06C08F220/18C08F220/14C08F220/28
Inventor 吕建平李彬曾宪旦宋玉凤周超民
Owner HEFEI UNIV OF TECH
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