CN109293872A - A kind of polyurethane special type curing agent of anti-scratching wearproof and its preparation method and application - Google Patents
A kind of polyurethane special type curing agent of anti-scratching wearproof and its preparation method and application Download PDFInfo
- Publication number
- CN109293872A CN109293872A CN201810895475.XA CN201810895475A CN109293872A CN 109293872 A CN109293872 A CN 109293872A CN 201810895475 A CN201810895475 A CN 201810895475A CN 109293872 A CN109293872 A CN 109293872A
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- Prior art keywords
- curing agent
- diisocyanate
- special type
- type curing
- polyurethane
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Classifications
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/08—Processes
- C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
Abstract
The invention discloses polyurethane special type curing agent of a kind of anti-scratching wearproof and its preparation method and application.The polyurethane special type curing agent of this anti-scratching wearproof is the polyurethane curing agent that diisocyanate prepolymer and diisocyanate monomer are formed by connecting with siloxy.The preparation method of the polyurethane special type curing agent of this anti-scratching wearproof is that reaction is mixed, obtains polyurethane special type curing agent using diisocyanate prepolymer, diisocyanate monomer and end hydroxyl silicone oil as raw material.The application of the polyurethane special type curing agent of this anti-scratching wearproof is also disclosed simultaneously.Anti-scratching wearproof polyurethane special type curing agent of the invention has many advantages, such as that good excellent storage stability, the anti-pollution water resistance of film, anti-scratching wearproof superior performance, strength character is high, film formation surface is smooth; it is mating suitable for polyurethane protective coating, polyurethane spray painting etc.; two-component anti-scratching wearproof sapecial coating and paint is made, meets requirement of the decoration industry for aspect of performance such as anti-scratching wearproof, anti-pollution, water resistances.
Description
Technical field
The present invention relates to polyurethane special type curing agent of a kind of anti-scratching wearproof and its preparation method and application.
Background technique
In decoration industry, ornament materials often has the performance requirements such as anti-scratching wearproof, anti-pollution, water-fast.Currently on the market
The paint coatings and paint applied to decoration industry it is universal all there are the performances such as anti-scratching wearproof, anti-pollution, water-fast, but it is overall
Requirement has not yet been reached in anti-scratching wearproof, antifouling property.And coating in the market is painted and is modified, and being usually directly added wherein has
The auxiliary agents such as machine silicone oil, hand feeling agent are modified, and over time, the host agent of these additions can be natural from coating and paint layer
It is free to be lost, to make the performances sharp fall such as the anti-scratching wearproof of coating and paint layer, pollution resistance, so effect is not lasting.
Coating, the hardness of paint layer and surface smooth degree can greatly be reinforced by matching with curing agent, to improve coating, paint layer
The performances such as anti-scratching wearproof, anti-pollution, water resistance.The ratio of organosilicon and hand feeling agent that anti-scratching wearproof coating on the market often adds
Weight is higher, and the cost of product is greatly improved.
Therefore, the performances such as coating, the anti-scratching wearproof of paint, anti-pollution how to be improved and energy permanent retention becomes current difficulty
Topic.
Summary of the invention
The purpose of the present invention is to provide polyurethane special type curing agent of a kind of anti-scratching wearproof and its preparation method and application.
The technical solution used in the present invention is:
A kind of polyurethane special type curing agent of anti-scratching wearproof, is diisocyanate prepolymer and diisocyanate monomer with silicon
The polyurethane curing agent that alkoxy is formed by connecting.
The preparation method of the polyurethane special type curing agent of this anti-scratching wearproof is with diisocyanate prepolymer, two isocyanides
Acid ester monomer and end hydroxyl silicone oil are raw material, and reaction is mixed, obtains polyurethane special type curing agent.
Functional group's molar ratio of diisocyanate prepolymer and diisocyanate monomer is NCOPrepolymer: NCOMonomer=1:(0.05
~0.2).
The additional amount of end hydroxyl silicone oil be diisocyanate prepolymer and diisocyanate monomer quality sum 1%~
15%.
Diisocyanate prepolymer is biphenyl methane diisocyanate prepolymer, toluene diisocyanate prepolymer, six
At least one of methylene diisocyanate prepolymer, isophorone diisocyanate prepolymer.
Degree of functionality >=3 of diisocyanate prepolymer.
Diisocyanate monomer is methyl diphenylene diisocyanate, isophorone diisocyanate, hydrogenation phenylmethane
At least one of diisocyanate.
End hydroxyl silicone oil is primary hydroxyl Siloxane-Oxyalkylene Copolymers.
The molecular weight of end hydroxyl silicone oil is 1000~3500.
The preparation method of the polyurethane special type curing agent of this anti-scratching wearproof, comprising the following steps:
A) diisocyanate prepolymer and diisocyanate monomer are added in reaction kettle, are stirred evenly, control temperature
It is 40 DEG C~60 DEG C；End hydroxyl silicone oil and organic solvent are subjected to mixed diluting, and are added drop-wise in reaction kettle；
B) after being added dropwise, temperature is controlled at 80 DEG C hereinafter, being stirred to react 2h~3h；
C) control temperature is stirred to react 5h~20h at 80 DEG C~100 DEG C, then is cooled to 60 DEG C hereinafter, discharging, is resisted
Scrape wear-resisting polyurethane special type curing agent.
In step a), the mass ratio of end hydroxyl silicone oil and organic solvent is 10:(3~8).
In step a), organic solvent is ethyl acetate, butyl acetate, butanone, cyclohexanone, propylene glycol methyl ether acetate, two
At least one of propylene glycol methyl ether acetate.
The polyurethane special type curing agent of this anti-scratching wearproof is preparing the application in dual-component coating or paint.
The beneficial effects of the present invention are:
Anti-scratching wearproof polyurethane special type curing agent of the invention have excellent storage stability, the anti-pollution water resistance of film it is good,
The advantages that anti-scratching wearproof superior performance, strength character are high, film formation surface is smooth is suitable for polyurethane protective coating, polyurethane spray
Paint etc. is mating, and two-component anti-scratching wearproof sapecial coating and paint is made, and meets decoration industry for anti-scratching wearproof, anti-pollution, water-fast
The requirement of the aspect of performance such as property.
Specifically, compared with the prior art, the invention has the following advantages:
A) harm to the human body is small.End hydroxyl silicone oil is added to diisocyanate prepolymer by the way of being added dropwise by the present invention
In the mixture of object and diisocyanate monomer, the conversion ratio of polymerization reaction can be effectively improved, reduces curative systems middle reaches
Content from monomer.
B) it has wide range of applications.The present invention can be different according to the type of diisocyanate, are respectively applied to indoor and outdoor
Ornament materials, and can effectively improve the appearance and levelability of film, adapt coating to the coating of different materials.
C) film performance, stable and durable effect are improved.The present invention using end hydroxyl silicone oil to diisocyanate prepolymer into
Row is modified, both modified to be combined together in a manner of chemical bond, so that curing agent is permanently provided with anti-scratching wearproof, anti-pollution water-fast
The performance of property etc., and so modification can make terminal hydroxy group organic silicone oil that can be evenly distributed in curative systems, molecule
Between will not get together because of Van der Waals force, finally escape curative systems.By with coating, paint match, with coating,
Paint crosslinks reaction, can effectively improve the hardness of film, anti-scratching wearproof, pollution resistance, water resistance, smooth etc. after forming a film
Performance solves the problems, such as free be lost of the auxiliary agents such as organosilicon, hand feeling agent and leads to filming performance sharp fall.
D) easy to use.User can be adjusted solid according to itself product for the demand of the performances such as anti-scratching wearproof, pollution resistance
The additive amount of agent；After mixing with the hydroxyl component of anti-scratching wearproof coating, that is, it can be made into two-component anti-scratching wearproof coating.
E) there is cost advantage.The present invention and coating, paint match, then film can be allowed to have high rigidity, anti-scratch resistance to
The performances such as mill property, pollution resistance, water resistance, smooth, do not need that the auxiliary agents such as a large amount of organic silicone oil, hand feeling agent are added, relative to city
Coating, the paint sold on field have stronger cost advantage.
Specific embodiment
A kind of polyurethane special type curing agent of anti-scratching wearproof, is diisocyanate prepolymer and diisocyanate monomer with silicon
The polyurethane curing agent that alkoxy is formed by connecting.
The preparation method of the polyurethane special type curing agent of this anti-scratching wearproof is with diisocyanate prepolymer, two isocyanides
Acid ester monomer and end hydroxyl silicone oil are raw material, and reaction is mixed, obtains polyurethane special type curing agent.
Preferably, functional group's molar ratio of diisocyanate prepolymer and diisocyanate monomer is NCOPrepolymer: NCOMonomer=
1:(0.05~0.2)；Preferably, functional group's molar ratio of diisocyanate prepolymer and diisocyanate monomer is NCOPrepolymer:
NCOMonomer=1:(1/8~1/6).
Preferably, the additional amount of end hydroxyl silicone oil is diisocyanate prepolymer and diisocyanate monomer quality sum
The 1%~15% of (isocyanates gross mass)；It is further preferred that the additional amount of end hydroxyl silicone oil is diisocyanate prepolymer
With the 8%~12% of diisocyanate monomer quality sum.
Preferably, diisocyanate prepolymer is that biphenyl methane diisocyanate prepolymer, toluene di-isocyanate(TDI) are pre-
At least one of polymers, hexamethylene diisocyanate prepolymer, isophorone diisocyanate prepolymer.
Preferably, degree of functionality >=3 of diisocyanate prepolymer.
Preferably, the solid content of diisocyanate prepolymer is 60wt%~80wt%；It is further preferred that diisocyanate
The solid content of ester prepolymer is 68wt%~75wt%.
Preferably, diisocyanate monomer is methyl diphenylene diisocyanate, isophorone diisocyanate, hydrogenation of benzene
At least one of dicyclohexylmethane diisocyanate.
Preferably, end hydroxyl silicone oil is primary hydroxyl Siloxane-Oxyalkylene Copolymers.
Preferably, the molecular weight of end hydroxyl silicone oil is 1000~3500；It is further preferred that the molecular weight of end hydroxyl silicone oil
It is 2500~2800.
The preparation method of the polyurethane special type curing agent of this anti-scratching wearproof, comprising the following steps:
A) diisocyanate prepolymer and diisocyanate monomer are added in reaction kettle, are stirred evenly, control temperature
It is 40 DEG C~60 DEG C；End hydroxyl silicone oil and organic solvent are subjected to mixed diluting, and are added drop-wise in reaction kettle；
B) after being added dropwise, temperature is controlled at 80 DEG C hereinafter, being stirred to react 2h~3h；
C) control temperature is stirred to react 5h~20h at 80 DEG C~100 DEG C, then is cooled to 60 DEG C hereinafter, discharging, is resisted
Scrape wear-resisting polyurethane special type curing agent.
Preferably, in step a), the mass ratio of end hydroxyl silicone oil and organic solvent is 10:(3~8).
Preferably, in step a), organic solvent is ethyl acetate, butyl acetate, butanone, cyclohexanone, propylene glycol monomethyl ether vinegar
At least one of acid esters, dipropylene glycol methyl ether acetate.
Preferably, in step a), controlled at 50 DEG C~60 DEG C.
Preferably, in step a), being added dropwise by the speed of the end hydroxyl silicone oil of organic solvent diluting is 20g/min~35g/
min；It is further preferred that in step a), be added dropwise by the speed of the end hydroxyl silicone oil of organic solvent diluting be 25g/min~
31g/min。
Preferably, in step b), control temperature is at 80 DEG C in detail below for controlled at 70 DEG C~80 DEG C.
Preferably, in step c), control temperature is specially controlled at 82 DEG C~90 DEG C at 80 DEG C or more.
Further, in step c), when diisocyanate prepolymer is toluene diisocyanate prepolymer or diphenylmethyl
Alkane diisocyanate prepolymer, when diisocyanate monomer is methyl diphenylene diisocyanate, the reaction time is 5~8 hours；
When diisocyanate prepolymer is isophorone diisocyanate prepolymer or hexamethylene diisocyanate prepolymer, two isocyanides
When acid ester monomer is isophorone diisocyanate or hydrogenation methylenebis phenyl isocyanate, the reaction time is 12~20 hours.
Further, in step c), before discharging, the solid content of organic solvent adjustment curing agent product is added.
Further, the solid content of polyurethane special type curing agent is 50wt%~75wt%.
Further, adjusting organic solvent used in solid content is ethyl acetate, butyl acetate, butanone, cyclohexanone, the third two
At least one of alcohol methyl ether acetate, dipropylene glycol methyl ether acetate.
The polyurethane special type curing agent of this anti-scratching wearproof is preparing the application in dual-component coating or paint.
Further, the polyurethane special type curing agent of this anti-scratching wearproof can be used for and solvent-based two-component coating and oil
The hydroxy component of paint, aqueous double-component coating and paint matches.
Invention thinking of the invention be using end hydroxyl silicone oil to diisocyanate prepolymer and diisocyanate monomer into
The modification of row molecular structure is combined together the two in a manner of chemical bond, in diisocyanate prepolymer and diisocyanate
Siloxane based structure is introduced in ester monomer structure, so that curing agent itself be made to have the performance with organosilicon, hand feeling agent.Pass through
Mating, obtained two-component anti-scratching wearproof anti-pollution layer, paint are carried out with the hydroxy component of coating, paint.
The contents of the present invention are described in further detail below by way of specific embodiment.Original used in embodiment
Material unless otherwise specified, can be obtained from routine business approach.
Embodiment 1:
The polyurethane special type curing agent of embodiment 1 the preparation method is as follows:
A) in a kettle, the toluene diisocyanate prepolymer solution that 1000g solid content is 75% is added according to the proportion
It with 23.75g methyl diphenylene diisocyanate monomer, and stirs evenly, controlled at 55 DEG C, then is added dropwise dilute with ethyl acetate
The end hydroxyl silicone oil 69.64g that the solid content released is 55.54%, dripping speed control is 28g/min；
B) after being added dropwise, temperature is controlled at 70 DEG C, is stirred simultaneously natural reaction 2 hours；
C) after natural reaction 2 hours, temperature is controlled at 85 DEG C, stirs and reacts 7 hours；Finally, be cooled to 60 DEG C hereinafter,
531.49g butyl acetate is added, stirs evenly and discharges, obtains the polyurethane special type solidification for the anti-scratching wearproof that solid content is 50%
Agent.
Embodiment 2:
The polyurethane special type curing agent of embodiment 2 the preparation method is as follows:
A) in a kettle, the methyl diphenylene diisocyanate pre-polymerization that 1000g solid content is 68% is added according to the proportion
Object solution and 46.74g methyl diphenylene diisocyanate monomer, and stir evenly controlled at 50 DEG C, then are added dropwise with the third two
The end hydroxyl silicone oil 86.77g that the diluted solid content of alcohol methyl ether acetate is 67%, dripping speed control is 25g/min；
B) after being added dropwise, temperature is controlled at 75 DEG C, is stirred simultaneously natural reaction 2 hours；
C) after natural reaction 2 hours, temperature is controlled at 82 DEG C, stirs and reacts 5 hours；Finally, be cooled to 60 DEG C hereinafter,
436.24g propylene glycol methyl ether acetate is added, stirs evenly and discharges, obtains the polyurethane for the anti-scratching wearproof that solid content is 50%
Extraordinary curing agent.
Embodiment 3:
The polyurethane special type curing agent of embodiment 3 the preparation method is as follows:
A) in a kettle, the isophorone diisocyanate prepolymer that 1000g solid content is 70% is added according to the proportion
Solution and 52.04g isophorone diisocyanate monomer, and stir evenly, controlled at 60 DEG C, then it is added dropwise and uses butyl acetate
The end hydroxyl silicone oil 117.32g that diluted solid content is 76.92%, dripping speed control is 31g/min；
B) after being added dropwise, temperature is controlled at 80 DEG C, is stirred simultaneously natural reaction 2 hours；
C) after natural reaction 2 hours, temperature is controlled at 88 DEG C, stirs and reacts 16 hours；Finally, be cooled to 60 DEG C with
Under, 33.90g butyl acetate is added, stirs evenly and discharges, the polyurethane special type for obtaining the anti-scratching wearproof that solid content is 70% is solid
Agent.
Embodiment 4:
The polyurethane special type curing agent of embodiment 4 the preparation method is as follows:
A) in a kettle, the hexamethylene diisocyanate prepolymer that 1000g solid content is 75% is added according to the proportion
Solution and 100.93g hydrogenated diphenyl methane diisocyanate monomer, and stir evenly, controlled at 60 DEG C, then use is added dropwise
The end hydroxyl silicone oil 190.51g that the diluted solid content of butyl acetate is 67%, dripping speed control is 30g/min；
B) after being added dropwise, temperature is controlled at 80 DEG C, is stirred simultaneously natural reaction 2 hours；
C) after natural reaction 2 hours, temperature is controlled at 90 DEG C, stirs and reacts 20 hours；Finally, be cooled to 60 DEG C with
Under, 13.32g ethyl acetate is added, stirs evenly and discharges, the polyurethane special type for obtaining the anti-scratching wearproof that solid content is 75% is solid
Agent.Application Example 1:
The sample of embodiment 1 is mixed with the solvent-type acrylic coating that solid content is 25%, two-component third is made
Olefin(e) acid coating.Solidify 24 hours at 50 DEG C, film performance obtained is as follows: gloss (60 DEG C) >=95%；Hardness: shore D74；Punching
Hit intensity: 750Ncm；Adhesive force: 1 grade；Flexibility: 1mm.
The method of inspection: gloss presses GB1730-79 by GB9754-88, hardness, impact strength presses GB/T 2571-1995, attached
Put forth effort by GB1720-89, flexibility by GB1731-79 standard.
Application Example 2:
By the sample of embodiment 3 and solid content be 25% aqueous acrylamide it is acid coated mix, be made double-component aqueous
Acrylic acid coatings.Solidify 72 hours at 60 DEG C, film performance obtained is as follows: gloss (60 DEG C) >=95%；Hardness: shore D72；
Impact strength: 700Ncm；Adhesive force: 1 grade；Flexibility: 1mm.
The method of inspection: gloss presses GB1730-79 by GB9754-88, hardness, impact strength presses GB/T 2571-1995, attached
Put forth effort by GB1720-89, flexibility by GB1731-79 standard.
Claims (10)
1. a kind of polyurethane special type curing agent of anti-scratching wearproof, it is characterised in that: be diisocyanate prepolymer and diisocyanate
The polyurethane curing agent that ester monomer is formed by connecting with siloxy.
2. a kind of preparation method of the polyurethane special type curing agent of anti-scratching wearproof described in claim 1, it is characterised in that: different with two
Cyanate prepolymer, diisocyanate monomer and end hydroxyl silicone oil are raw material, and reaction is mixed, and obtain the solidification of polyurethane special type
Agent.
3. a kind of preparation method of the polyurethane special type curing agent of anti-scratching wearproof according to claim 2, it is characterised in that:
Functional group's molar ratio of diisocyanate prepolymer and diisocyanate monomer is NCOPrepolymer: NCOMonomer=1:(0.05~0.2)；
The additional amount of end hydroxyl silicone oil is the 1%~15% of diisocyanate prepolymer and diisocyanate monomer quality sum.
4. a kind of preparation method of the polyurethane special type curing agent of anti-scratching wearproof according to claim 3, it is characterised in that:
Diisocyanate prepolymer is biphenyl methane diisocyanate prepolymer, toluene diisocyanate prepolymer, hexa-methylene two
At least one of isocyanate prepolymer, isophorone diisocyanate prepolymer；The degree of functionality of diisocyanate prepolymer
≥3。
5. a kind of preparation method of the polyurethane special type curing agent of anti-scratching wearproof according to claim 3, it is characterised in that:
Diisocyanate monomer is methyl diphenylene diisocyanate, isophorone diisocyanate, hydrogenation phenylmethane diisocyanate
At least one of ester.
6. a kind of preparation method of the polyurethane special type curing agent of anti-scratching wearproof according to claim 3, it is characterised in that:
End hydroxyl silicone oil is primary hydroxyl Siloxane-Oxyalkylene Copolymers；The molecular weight of end hydroxyl silicone oil is 1000~3500.
7. according to a kind of described in any item preparation methods of the polyurethane special type curing agent of anti-scratching wearproof of claim 2~6,
It is characterized in that: the following steps are included:
A) diisocyanate prepolymer and diisocyanate monomer are added in reaction kettle, are stirred evenly, controlled at 40
DEG C~60 DEG C；End hydroxyl silicone oil and organic solvent are subjected to mixed diluting, and are added drop-wise in reaction kettle；
B) after being added dropwise, temperature is controlled at 80 DEG C hereinafter, being stirred to react 2h~3h；
C) control temperature is stirred to react 5h~20h at 80 DEG C~100 DEG C, then is cooled to 60 DEG C hereinafter, discharging, obtains anti-scratch resistance to
The polyurethane special type curing agent of mill.
8. a kind of preparation method of the polyurethane special type curing agent of anti-scratching wearproof according to claim 7, it is characterised in that:
In step a), the mass ratio of end hydroxyl silicone oil and organic solvent is 10:(3~8).
9. a kind of preparation method of the polyurethane special type curing agent of anti-scratching wearproof according to claim 8, it is characterised in that:
In step a), organic solvent is ethyl acetate, butyl acetate, butanone, cyclohexanone, propylene glycol methyl ether acetate, dipropylene glycol first
At least one of ether acetate.
10. a kind of polyurethane special type curing agent of anti-scratching wearproof described in claim 1 is in preparing dual-component coating or paint
Application.
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| CN201810895475.XA CN109293872A (en) | 2018-08-08 | 2018-08-08 | A kind of polyurethane special type curing agent of anti-scratching wearproof and its preparation method and application |
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| CN201810895475.XA CN109293872A (en) | 2018-08-08 | 2018-08-08 | A kind of polyurethane special type curing agent of anti-scratching wearproof and its preparation method and application |
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|---|---|---|---|---|
| CN110499098A (en) * | 2019-09-09 | 2019-11-26 | 佛山市大幸新材料有限公司 | A kind of antifouling protective agent of dumb light sheen ceramic tile |
| CN116694216A (en) * | 2023-06-29 | 2023-09-05 | 海洋化工研究院有限公司 | Room-temperature-cured two-component high-strength high-elasticity high-wear-resistance polyurethane resin and preparation method thereof |
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| US4916199A (en) * | 1988-07-14 | 1990-04-10 | The B. F. Goodrich Company | Polyurethanes made from blends of polypropyleneoxide polyol and organic-silicone block copolymer based polyol intermediates |
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| CN110499098A (en) * | 2019-09-09 | 2019-11-26 | 佛山市大幸新材料有限公司 | A kind of antifouling protective agent of dumb light sheen ceramic tile |
| CN116694216A (en) * | 2023-06-29 | 2023-09-05 | 海洋化工研究院有限公司 | Room-temperature-cured two-component high-strength high-elasticity high-wear-resistance polyurethane resin and preparation method thereof |
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