Oily polyurethane adhesive and preparation method thereof

A technology of oily polyurethane and adhesive, applied in the direction of polyurea/polyurethane adhesive, adhesive, adhesive type, etc., can solve the problems of low temperature resistance, easy yellowing, etc., and achieve low cost, no yellowing, long-term storage The effect of stable performance

Active Publication Date: 2022-02-18
广东粤港澳大湾区黄埔材料研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art and provide an oily polyurethane adhesive and its preparation method to overcome the technical problems that the existing polyurethane adhesive is not resistant to low temperature and easy to yellow

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1: A kind of oily polyurethane adhesive

[0029] The preparation method of this oily polyurethane adhesive is:

[0030] (1) Add polyester polyol in the reactor; Polyester polyol is polyethylene adipate (PEA); Add solvent ethyl acetate (EAC); Add neopentyl glycol (NPG) again, stir Uniform;

[0031] Wherein, the mass ratio of polyethylene adipate (PEA) and ethyl acetate (EAC) is 1:3, the molar ratio of polyethylene adipate (PEA) and neopentyl glycol (NPG) 1.42:1, preheat 75~85℃, stirring speed 200r / min;

[0032] (2) Add hexamethylene diisocyanate (HDI), drop dibutyltin dilaurate catalyst;

[0033] Wherein, the mol ratio of hexamethylene diisocyanate (HDI) and polyethylene adipate (PEA) is 1.03:1, and the consumption of catalyst is 0.02% of total mass of PEA, EAC, NPG, HDI, reaction time 0.5 hours to 3 hours;

[0034] (3) On the basis of step (2), the viscosity of the reaction system is adjusted by solvent butanone; the mass percentage of butanone and ethyl...

Embodiment 2

[0037] Embodiment 2: A kind of oily polyurethane adhesive

[0038] The preparation method of this oily polyurethane adhesive is:

[0039] (1) Add polyester polyol in the reactor; Polyester polyol is polytrimethylene adipate (PPA); Add solvent acetone (ACE); Add neopentyl glycol (NPG) again, stir;

[0040] Wherein, the mass ratio of polytrimethylene adipate (PPA) and acetone (ACE) is 1:2.5, and the molar ratio of polytrimethylene adipate (PPA) and neopentyl glycol (NPG) is 1.5:1, pre- Heat at 75~85℃, stirring speed is 200r / min;

[0041] (2) Add hexamethylene diisocyanate (HDI), drop stannous octoate catalyst;

[0042] Wherein, the molar ratio of hexamethylene diisocyanate (HDI) and polytrimethylene adipate (PPA) is 1.12:1, and the consumption of catalyst is 0.018% of the total mass of PPA, ACE, NPG, HDI, and the reaction time is 0.5 hours to 3 hours;

[0043] (3) On the basis of step (2), the viscosity of the reaction system is adjusted by the solvent butanone; the mass per...

Embodiment 3

[0046]Embodiment 3: A kind of oily polyurethane adhesive

[0047] The preparation method of this oily polyurethane adhesive is:

[0048] (1) Add polyester polyol in reactor; Polyester polyol is polybutylene adipate (PBA); Add solvent acetone (ACE); Add neopentyl glycol (NPG) again, stir;

[0049] Wherein, the mass ratio of polytrimethylene adipate (PPA) and acetone (ACE) is 1:2.8, and the molar ratio of polybutylene adipate (PBA) and neopentyl glycol (NPG) is 1.45:1 , preheat to 75-85°C, and the stirring speed is 200r / min;

[0050] (2) Add hexamethylene diisocyanate (HDI), drop dibutyltin diacetate catalyst;

[0051] Wherein, the mol ratio of hexamethylene diisocyanate (HDI) and polybutylene adipate (PBA) is 1.08:1, and the consumption of catalyst is 0.025% of the total mass of PBA, ACE, NPG, HDI, reaction time 0.5 hours to 3 hours;

[0052] (3) On the basis of step (2), the viscosity of the reaction system is adjusted by the solvent butanone; the mass percentage of butano...

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Abstract

The invention belongs to the technical field of polyurethane adhesives, and discloses an oily polyurethane adhesive and a preparation method thereof. The oily polyurethane adhesive disclosed by the invention is prepared from polyester polyol, neopentyl glycol, hexamethylene diisocyanate, an organic tin catalyst and an organic solvent. On the premise of ensuring the viscosity of the adhesive, the oily polyurethane adhesive disclosed by the invention has the advantages of excellent stripping resistance, low temperature resistance and bending resistance, no yellowing phenomenon and stable long-term storage performance; and the solid content is moderate, and the adhesive has the advantages of favorable workability and low cost, and is suitable for the fields of shoemaking, packaging, automobile adhesives and the like.

Description

technical field [0001] The invention relates to the technical field of polyurethane adhesives, in particular to an oily polyurethane adhesive and a preparation method thereof. Background technique [0002] In order to join different types of substrates, including metal components, polymer composites, and concrete structures, polyolefin resins are usually coated on the surface of the substrates and then laminated to form laminates. [0003] Polyolefin resin is non-toxic, exhibits strong durability against acids, alkalis, organic solvents, etc., has excellent mechanical strength and abrasion resistance, and is inexpensive. However, since polyolefin resins are non-polar, bonding to some substrates is difficult. Various adhesives have been proposed for bonding polyolefin resins to substrates. For example, thermosetting resins such as phenolic resins, melamine resins, and epoxy resins or thermoplastic resins are dissolved in organic solvents to form a base adhesive, and solvent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/06C08G18/66C08G18/42C08G18/32
CPCC09J175/06C08G18/664C08G18/4238C08G18/3206
Inventor 杨小牛张鑫赵晓礼
Owner 广东粤港澳大湾区黄埔材料研究院
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