CN110003417A - A kind of Isocyanate prepolymers body and its preparation method and application - Google Patents
A kind of Isocyanate prepolymers body and its preparation method and application Download PDFInfo
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- CN110003417A CN110003417A CN201811581976.7A CN201811581976A CN110003417A CN 110003417 A CN110003417 A CN 110003417A CN 201811581976 A CN201811581976 A CN 201811581976A CN 110003417 A CN110003417 A CN 110003417A
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- isocyanates
- polyurethane foam
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- amino silane
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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
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/30—Low-molecular-weight compounds
- C08G18/38—Low-molecular-weight compounds having heteroatoms other than oxygen
- C08G18/3893—Low-molecular-weight compounds having heteroatoms other than oxygen containing silicon
-
- 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
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
- C08G18/4829—Polyethers containing at least three hydroxy groups
-
- 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
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
- C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
- C08G18/7614—Polyisocyanates or polyisothiocyanates cyclic aromatic containing only one aromatic ring
-
- 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
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
- C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
- C08G18/7614—Polyisocyanates or polyisothiocyanates cyclic aromatic containing only one aromatic ring
- C08G18/7621—Polyisocyanates or polyisothiocyanates cyclic aromatic containing only one aromatic ring being toluene diisocyanate including isomer mixtures
-
- 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
- C08G2110/00—Foam properties
- C08G2110/0008—Foam properties flexible
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Polyurethanes Or Polyureas (AREA)
Abstract
The invention discloses a kind of Isocyanate prepolymers body, the Isocyanate prepolymers body is reacted by isocyanates and amino silane to be made.In isocyanates-NCO group and amino silane in-NH2Reaction generates urea groups (- NH-CO-NH-), forms the Isocyanate prepolymers body that isocyanate index is adjustable and viscosity is low.The soft polyurethane foam synthesized by above-mentioned Isocyanate prepolymers body, urea groups can increase the hard segment content in soft polyurethane foam, to promote the mechanical property of soft polyurethane foam.Simultaneously, make to be evenly distributed with Si-OR group in Isocyanate prepolymers body using amino silane, hydrolytie polycondensation occurs for Si-OR group, forms the cross-linked structure of Si-O-Si, the crosslink density for increasing functional group in soft polyurethane foam obtains the soft polyurethane foam that tensile strength and tearing strength are promoted.
Description
Technical field
The invention belongs to technical field of polymer materials, and in particular to a kind of Isocyanate prepolymers body and preparation method thereof and
Using.
Background technique
Polyurethane (polyurethane) full name is polyurethanes, is on the main chain of strand containing repetition amino first
The general designation of the macromolecular compound of acid esters group (- NH-CO-O-).It is by organic diisocyanate or polyisocyanates and two
Hydroxyl or polyol addition polymerization form.Characteristic group is various in the type and polymer of urethane raw, makes polyurethane
Physical structure is complicated.The product of different performance can be made up of the type and proportion that adjust raw material.Polyurethane product form has
Soft, semi-rigid and rigid foam, elastomer, coating, adhesive, sealant, synthetic leather coating resin, elastomer
Deng each based article is widely used in automobile manufacture, refrigerator manufacture, communications and transportation, building, footwear, synthetic leather, weaving, electromechanics, stone
The fields such as oiling work, mine mechanism, aerospace, medical treatment, agricultural.
It is maximum, most widely used with soft polyurethane foam yield in polyurethane material.Soft polyurethane foam, i.e. flexibel polyurethane bubble
Foam, refers to a kind of flexibility polyurethane foam plastics with certain elasticity, low with its density, resilience is good, ventilative, heat-insulated etc.
Feature is widely used in the fields such as furniture, seat cushions, health care.Currently, the synthesis of soft polyurethane foam is mainly by polyethers
Polyalcohol and isocyanates is foamed, gel-forming.Soft polyurethane foam has small porosity, relative density, sound-absorbing, ventilative, guarantor
The performances such as temperature, but since the crosslink density of functional group in soft polyurethane foam is relatively weak, make soft polyurethane foam, especially low-density
The mechanical property of soft polyurethane foam is impaired.
For improve soft polyurethane foam mechanical property, generally by being modified to soft polyurethane foam, to improve polyurethane
Functional group's degree of cross linking in soft bubble.For example, disclosing a kind of silylated poly- ammonia in Chinese patent literature CN106459362A
The preparation method of ester is the following steps are included: (a) makes the reactive chemical combination of at least one isocyanates Yu at least one isocyanates
Object optionally mixes in the presence of a catalyst；(b) product of step (a) is mixed at least one amino silane；Thus first is made
Silylated polyurethane.In above-mentioned preparation process, using including a certain amount of 2,4 '-methylenediphenyl diisocyanates
Ester makes the capping process of the prepolymer of isocyanates generate the chain extension of bottom line, obtains with the silicyl compared with low viscosity
Change polyurethane.It is sealed in the preparation process of silylated polyurethane by using prepolymer of the amino silane to isocyanates
End is modified, to improve the mechanical property of polyurethane, but the main-NCO with Isocyanate prepolymers body main chain terminal of amino silane
Reaction limits the effective quantity that Si-OR group is introduced inside polyurethane, and Si-OR group is unevenly distributed, shape in polyurethane
At cross-linked network regularity it is poor, influence the improvement effect to polyurethane material mechanical property.
Summary of the invention
Therefore, the technical problem to be solved in the present invention is that overcoming the blocking modification of Isocyanate prepolymers body in the prior art
Polyurethane obtained can not introduce a effective amount of Si-OR group and Si-OR group is unevenly distributed, and reduce to polyurethane material
The defect of mechanical property improvement effect.
For this reason, the present invention provides the following technical scheme that
The present invention provides a kind of Isocyanate prepolymers body, the Isocyanate prepolymers body is by isocyanates and amino silane
Reaction is made.
Preferably, the molar ratio of above-mentioned Isocyanate prepolymers body, the isocyanates and the amino silane is 1:10
~1:100；Preferably, the molar ratio of the isocyanates and the amino silane is 1:10~1:50.
It is further preferred that above-mentioned Isocyanate prepolymers body, the molar ratio of the isocyanates and the amino silane
For 1:10.
Preferably, above-mentioned Isocyanate prepolymers body, the isocyanates are selected from Toluene-2,4-diisocyanate, 4- diisocyanate and first
At least one of benzene -2,6- diisocyanate.
Preferably, above-mentioned Isocyanate prepolymers body, the amino silane be selected from γ aminopropyltriethoxy silane and
At least one of gamma-amino propyl trimethoxy silicane.
The present invention provides a kind of methods for preparing above-mentioned Isocyanate prepolymers body, comprising the following steps:
Isocyanates is mixed with amino silane, no more than under 40 DEG C of reaction temperature, the isocyanates with it is described
Polymerization reaction occurs for amino silane, and Isocyanate prepolymers body is made.
Preferably, the step of above-mentioned preparation method, the isocyanates is mixed with amino silane includes:
Amino silane is added dropwise in isocyanates, control time for adding be 1-8 hours, make the isocyanates with it is described
Amino silane mixing；Preferably, the time for adding is 4-6 hours.
Preferably, above-mentioned preparation method, the reaction temperature are 0-30 DEG C；Preferably, the reaction temperature is 10-20
℃。
The present invention provides above-mentioned Isocyanate prepolymers bodies, or the Isocyanate prepolymers obtained by above-mentioned preparation method
Body is preparing the application in soft polyurethane foam.
Technical solution of the present invention has the advantages that
1. Isocyanate prepolymers body provided by the invention, Isocyanate prepolymers body is by isocyanates and amino silane reaction system
?.In isocyanates-NCO group and amino silane in-NH2Reaction, generate urea groups (- NH-CO-NH-), obtain main chain by
The Isocyanate prepolymers body that isocyanates and amino silane are formed, the Si-OR group in amino silane is in Isocyanate prepolymers body
In be evenly distributed, Isocyanate prepolymers body viscosity is low, and isocyanate index is adjustable.
With above-mentioned Isocyanate prepolymers body when being used to prepare soft polyurethane foam, the urea groups in Isocyanate prepolymers body can
To increase the hard segment content of soft polyurethane foam, the hydrogen bond density that urea groups and carbamate groups are formed increases, and hard section is mutually formed easily
In the structure of crystallization, so that the mechanical properties such as the tensile strength of soft polyurethane foam, tearing strength be made to get a promotion.Simultaneously as
It is evenly distributed with Si-OR group in Isocyanate prepolymers body, makes the content using Si-OR group in its soft polyurethane foam obtained
Increase, and Si-OR group is evenly distributed in soft polyurethane foam.During phase transition, hydrolytie polycondensation, shape occur for Si-OR group
At the cross-linked structure of Si-O-Si, the crosslink density of functional group in soft polyurethane foam is increased；Due to forming Si-O-Si crosslinking knot
The uniformity of the Si-OR group distribution of structure is good, is conducive to obtain the soft polyurethane foam with regular fine and close foam structure, polyurethane
Each tropism of soft bubble is good, and the mechanical property of soft polyurethane foam gets a promotion.
Further, since can be effectively reduced using the catalytic performance of amino with different in Isocyanate prepolymers body rich in amino
The amine catalyst used when the soft bubble of cyanate performed polymer synthesis of polyurethane, promotes the foamable reaction of polyurethane.Isocyanate prepolymers
Silica structure in body, be conducive to improve soft polyurethane foam at bubble performance, obtain the preferable soft polyurethane foam of foaming structure, and
And the usage amount of the foam stabilisers such as silicone oil in foaming process can be reduced, reduce the preparation cost of soft polyurethane foam, reduces
The complexity of soft polyurethane foam synthetic system.The viscosity of Isocyanate prepolymers body is low, and (viscosity under room temperature is 100-
600mPa.s), the viscosity for reducing polyurethane reaction system improves the mobility of polyurethane solutions, improves flexible polyurethane
The operability of synthesis process is steeped, to improve the foam structure and mechanical property of soft polyurethane foam.
2. the molar ratio of Isocyanate prepolymers body provided by the invention, isocyanates and the amino silane is 1:10~1:
100；Preferably, the molar ratio of the isocyanates and the amino silane is 1:10~1:50.By adjust isocyanates with
The molar ratio of amino silane, be conducive to in Isocyanate prepolymers body-content of NCO group is adjusted, and then realizes pairing
At soft polyurethane foam in soft segment and hard section ratio adjusting, to regulate and control the mechanical property of soft polyurethane foam；Meanwhile passing through control
The molar ratio of system between the two is conducive to the content for adjusting Si-OR group in Isocyanate prepolymers body, takes into account the polyurethane of synthesis
The cross-linked structure and structural integrity of soft bubble.When the molar ratio of isocyanates and amino silane is 1:10~1:50, isocyanide
The flexible polyurethane that the Isocyanate prepolymers physical efficiency that acid esters is reacted with amino silane is enough in synthesis pattern, mechanical property improves
Bubble.And when the molar ratio of the two is 1:10, Isocyanate prepolymers physical efficiency obtained accesses the optimal polyurethane of mechanical property
Soft bubble.
3. Isocyanate prepolymers body provided by the invention, isocyanates is selected from 2,4- diformazan phenylisocyanate and 2,6- diformazan
At least one of phenylisocyanate, amino silane are selected from γ aminopropyltriethoxy silane and gamma-amino propyl trimethoxy
At least one of base silane.By selecting the type of isocyanates and amino silane, Isocyanate prepolymers body is prepared with raising
Reactivity, the compatibility both improved is low and be effectively improved the isocyanic acid of soft polyurethane foam mechanical property to obtain viscosity
Ester performed polymer.
4. the method provided by the invention for preparing Isocyanate prepolymers body mixes isocyanates with amino silane, not
Under reaction temperature more than 40 DEG C, makes the isocyanates and the amino silane that polymerization reaction occur, control reaction temperature, have
Conducive to promotion-NCO group and-NH2Urea groups is formed between group, promotes the synthesis of base polyurethane prepolymer for use as.
Amino silane was added dropwise in isocyanates at 1-8 hours, comes into full contact with amino silane and isocyanates, instead
It answers, promotes the formation of urea groups between isocyanates and amino silane, improve reaction yield.When time for adding is 4-6 small, reaction
When temperature is 10-20 DEG C, the Isocyanate prepolymers body with optimal structure and yield.
Specific embodiment
There is provided following embodiments is to preferably further understand the present invention, it is not limited to the best embodiment party
Formula is not construed as limiting the contents of the present invention and protection scope, anyone under the inspiration of the present invention or by the present invention and its
The feature of his prior art is combined and any and identical or similar product of the present invention for obtaining, all falls within of the invention
Within protection scope.
Specific experiment step or condition person are not specified in embodiment, according to the literature in the art described routine experiment
The operation of step or condition can carry out.Reagents or instruments used without specified manufacturer, being can be by commercially available acquisition
Conventional reagent product.
Embodiment 1
The present embodiment provides a kind of base polyurethane prepolymer for use as, synthesis material includes that (TDI-80 is TDI-80 by mass fraction
The Toluene-2,4-diisocyanate that 80% Toluene-2,4-diisocyanate, 4- diisocyanate and mass fraction are 20%, 6- diisocyanate composition) 100g and γ-
Aminopropyltriethoxywerene werene 1.27g.The preparation method of base polyurethane prepolymer for use as the following steps are included:
(1) TDI-80 of 100g is added in the four-hole boiling flask for being built-in with agitating device, water-bath, keeps pot temperature
It is 40 DEG C；
(2) γ aminopropyltriethoxy silane of 1.27g is added dropwise into flask, control time for adding is 4h.It was added dropwise
It is 40 DEG C that pot temperature is controlled in journey, if temperature is more than 40 DEG C when reaction, stops being added dropwise, after temperature reduction, continues to drip
Add；
(3) after dripping, when the nco value of reaction system reaches 47% in test flask, stop reaction discharging, isocyanide is made
Acid esters performed polymer.
Embodiment 2
The present embodiment provides a kind of base polyurethane prepolymer for use as, synthesis material includes three second of TDI-80100g and gamma-amino propyl
Oxysilane 2.54g.The preparation method of base polyurethane prepolymer for use as the following steps are included:
(1) TDI-80 of 100g is added in the four-hole boiling flask for being built-in with agitating device, water-bath, keeps pot temperature
It is 40 DEG C；
(2) γ aminopropyltriethoxy silane of 2.54g is added dropwise into flask, control time for adding is 2h.It was added dropwise
It is 40 DEG C that pot temperature is controlled in journey, if temperature is more than 40 DEG C when reaction, stops being added dropwise, after temperature reduction, continues to drip
Add；
(3) after dripping, when the nco value of reaction system reaches 46% in test flask, stop reaction discharging, isocyanide is made
Acid esters performed polymer.
Embodiment 3
The present embodiment provides a kind of base polyurethane prepolymer for use as, synthesis material includes three second of TDI-80100g and gamma-amino propyl
Oxysilane 12.7g.The preparation method of base polyurethane prepolymer for use as the following steps are included:
(1) TDI-80 of 100g is added in the four-hole boiling flask for being built-in with agitating device, ice-water bath, keeps temperature in flask
Degree is 20 DEG C；
(2) γ aminopropyltriethoxy silane of 12.7g is added dropwise into flask, control time for adding is 8h.It was added dropwise
It is 20 DEG C that pot temperature is controlled in journey, if temperature is more than 20 DEG C when reaction, stops being added dropwise, after temperature reduction, continues to drip
Add；
(3) after dripping, when the nco value of reaction system reaches 38% in test flask, stop reaction discharging, isocyanide is made
Acid esters performed polymer.
Embodiment 4
The present embodiment provides a kind of base polyurethane prepolymer for use as, synthesis material includes TDI-80100g and gamma-amino propyl front three
Oxysilane 2.06g.The preparation method of base polyurethane prepolymer for use as the following steps are included:
(1) TDI-80 of 100g is added in the four-hole boiling flask for being built-in with agitating device, water-bath, keeps pot temperature
It is 30 DEG C；
(2) the gamma-amino propyl trimethoxy silicane of 2.06g is added dropwise into flask, control time for adding is 4h.It was added dropwise
It is 30 DEG C that pot temperature is controlled in journey, if temperature is more than 30 DEG C when reaction, stops being added dropwise, after temperature reduction, continues to drip
Add；
(3) after dripping, when the nco value of reaction system reaches 46% in test flask, stop reaction discharging, isocyanide is made
Acid esters performed polymer.
Embodiment 5
The present embodiment provides a kind of base polyurethane prepolymer for use as, synthesis material includes TDI-80100g and gamma-amino propyl front three
Oxysilane 10.29g.The preparation method of base polyurethane prepolymer for use as the following steps are included:
(1) TDI-80 of 100g is added in the four-hole boiling flask for being built-in with agitating device, ice-water bath, keeps temperature in flask
Degree is 10 DEG C；
(2) the gamma-amino propyl trimethoxy silicane of 10.29g is added dropwise into flask, control time for adding is 6h.It is added dropwise
Control pot temperature is 10 DEG C in the process, if temperature is more than 10 DEG C when reaction, stops being added dropwise, after temperature reduction, continue
It is added dropwise；
(3) after dripping, when the nco value of reaction system reaches 39% in test flask, stop reaction discharging, isocyanide is made
Acid esters performed polymer.
Embodiment 6
The present embodiment provides a kind of soft polyurethane foam sponge, soft polyurethane foam sponge is dual-component polyurethane reaction synthesis,
Wherein black material (containing isocyanate groups part) is the Isocyanate prepolymers body prepared in embodiment 1, and white material (contains active hydrogen
Group part) formula is specific as shown in table 1:
Table 1
| Material name | Number |
| Polyglycerol PPG3000 | 100 |
| H2O | 3 |
| Triethylene diamine A33 | 0.2 |
| T9 stannous octoate | 0.22 |
| Silicone oil | 0.8 |
The synthesis process of soft polyurethane foam sponge are as follows: in plastic cup, polyglycerol is added according to the raw material proportioning in table 1
PPG3000、H2O, triethylene diamine A33, T9 stannous octoate and silicone oil, stir evenly, and control mixing time is 50s, Zhi Houjia
Enter the Isocyanate prepolymers body of certain mass score, the quality of Isocyanate prepolymers body by black, white material isocyanate index (R
Value) it determines, guarantee that R value is 1.10 or so, continues to stir, when system is whitened, mixture is smoothly transferred to rapidly foaming
It foams in case, stirs 3-8s, stirring rate 2000-3000r/min rapidly, after system is whitened, will whiten rapidly
Reactant pour into mold 65 DEG C at a temperature of foam, after the reaction was completed, foam is placed in baking oven together with foaming mould
Middle curing cures 30min at 100 DEG C and obtains soft polyurethane foam sponge.
Embodiment 7
The present embodiment provides a kind of soft polyurethane foam sponge, the difference with soft polyurethane foam sponge in embodiment 6 is: closing
The isocyanates of the soft bubble sponge of generating polyurethane is the Isocyanate prepolymers body prepared in embodiment 2.
Embodiment 8
The present embodiment provides a kind of soft polyurethane foam sponge, the difference with soft polyurethane foam sponge in embodiment 6 is: closing
The isocyanates of the soft bubble sponge of generating polyurethane is the Isocyanate prepolymers body prepared in embodiment 3.
Embodiment 9
The present embodiment provides a kind of soft polyurethane foam sponge, the difference with soft polyurethane foam sponge in embodiment 6 is: closing
The isocyanates of the soft bubble sponge of generating polyurethane is the Isocyanate prepolymers body prepared in embodiment 4.
Embodiment 10
The present embodiment provides a kind of soft polyurethane foam sponge, the difference with soft polyurethane foam sponge in embodiment 6 is: closing
The isocyanates of the soft bubble sponge of generating polyurethane is the Isocyanate prepolymers body prepared in embodiment 5.
Embodiment 11
The present embodiment provides a kind of soft polyurethane foam sponge, the difference with soft polyurethane foam sponge in embodiment 6 is: poly-
The white material synthesis material of the soft bubble sponge of urethane is as shown in table 2.The additional amount of black material (Isocyanate prepolymers body) ensures the R of black and white material
Value is 1.10 or so.
Table 2
| Material name | Number |
| Polyglycerol PPG3000 | 100 |
| H2O | 6 |
| Triethylene diamine A33 | 0.2 |
| T9 stannous octoate | 0.25 |
| Silicone oil | 1.5 |
| Methylene chloride | 10 |
Embodiment 12
The present embodiment provides a kind of soft polyurethane foam sponge, the difference with soft polyurethane foam sponge in embodiment 11 is:
The isocyanates of the soft bubble sponge of synthesis of polyurethane is the Isocyanate prepolymers body prepared in embodiment 2.
Embodiment 13
The present embodiment provides a kind of soft polyurethane foam sponge, the difference with soft polyurethane foam sponge in embodiment 11 is:
The isocyanates of the soft bubble sponge of synthesis of polyurethane is the Isocyanate prepolymers body prepared in embodiment 3.
Embodiment 14
The present embodiment provides a kind of soft polyurethane foam sponge, the difference with soft polyurethane foam sponge in embodiment 11 is:
The isocyanates of the soft bubble sponge of synthesis of polyurethane is the Isocyanate prepolymers body prepared in embodiment 4.
Embodiment 15
The present embodiment provides a kind of soft polyurethane foam sponge, the difference with soft polyurethane foam sponge in embodiment 11 is:
The isocyanates of the soft bubble sponge of synthesis of polyurethane is the Isocyanate prepolymers body prepared in embodiment 5.
Comparative example 1
This comparative example provides a kind of soft polyurethane foam sponge, and the difference with soft polyurethane foam sponge in embodiment 6 is: closing
The isocyanates of the soft bubble sponge of generating polyurethane is TDI-80.
Comparative example 2
This comparative example provides a kind of soft polyurethane foam sponge, and the difference with soft polyurethane foam sponge in embodiment 11 is:
The isocyanates of the soft bubble sponge of synthesis of polyurethane is TDI-80.
Test case
It is measured with the resilience of soft polyurethane foam sponge according to GB/T 6670-2008, tensile strength is according to GB/T
6344-2008 is measured, and tearing strength is measured according to GB/T 10808-2006.Wherein, embodiment 6-10, comparative example 1
The mechanical experimental results of middle soft polyurethane foam sponge are as shown in table 3, soft polyurethane foam sea in embodiment 11-15, comparative example 2
Continuous mechanical experimental results are as shown in table 4:
Table 3
| Specimen coding | Steep careful degree (kg/m3) | Tensile strength (KPa) | Tearing strength (N/m) | Resilience (%) |
| Comparative example 1 | 30 | 200 | 450 | 35 |
| Embodiment 6 | 32 | 244 | 495 | 35 |
| Embodiment 7 | 29 | 287 | 551 | 34 |
| Embodiment 8 | 31 | 359 | 633 | 33 |
| Embodiment 9 | 29 | 278 | 572 | 33 |
| Embodiment 10 | 27 | 368 | 653 | 33 |
Table 4
| Specimen coding | Steep careful degree (kg/m3) | Tensile strength (KPa) | Tearing strength (N/m) | Resilience (%) |
| Comparative example 2 | 14 | 90 | 200 | 20 |
| Embodiment 11 | 15 | 145 | 241 | 21 |
| Embodiment 12 | 14 | 163 | 277 | 22 |
| Embodiment 13 | 13 | 193 | 318 | 20 |
| Embodiment 14 | 14 | 172 | 252 | 21 |
| Embodiment 15 | 14 | 191 | 343 | 23 |
By table 3 and 4 data of table it is found that the flexible polyurethane of the common density either synthesized in 3 embodiment and comparative example of table
The soft polyurethane foam sponge foam of the low-density synthesized in bubble sponge foam or 4 embodiment and comparative example of table, it is now identical
It steeps under careful degree, Isocyanate prepolymers body provided by the present invention is soft polyurethane foam sponge made from raw material, tensile strength
It compares with tearing strength and is obviously improved using the soft polyurethane foam sponge that toluene di-isocyanate(TDI) is prepared as raw material, illustrate system of the present invention
Urea groups in standby Isocyanate prepolymers body increases the hard segment content of soft polyurethane foam, and the Si- in Isocyanate prepolymers body
OR group forms the cross-linked structure of Si-O-Si in the soft bubble sponge of synthesis of polyurethane, effectively increases soft polyurethane foam sponge
Functional group's degree of cross linking, and cross-linked structure is evenly distributed, and the mechanical property of the soft polyurethane foam sponge made is obviously improved.
Obviously, the above embodiments are merely examples for clarifying the description, and does not limit the embodiments.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of variation or
It changes.There is no necessity and possibility to exhaust all the enbodiments.And it is extended from this it is obvious variation or
It changes still within the protection scope of the invention.
Claims (9)
1. a kind of Isocyanate prepolymers body, which is characterized in that the Isocyanate prepolymers body is anti-by isocyanates and amino silane
It should be made.
2. Isocyanate prepolymers body according to claim 1, which is characterized in that the isocyanates and the amino silane
Molar ratio be 1:10~1:100；Preferably, the molar ratio of the isocyanates and the amino silane is 1:10~1:50.
3. Isocyanate prepolymers body according to claim 2, which is characterized in that the isocyanates and the amino silane
Molar ratio be 1:10.
4. Isocyanate prepolymers body according to claim 1-3, which is characterized in that the isocyanates is selected from first
Benzene -2,4- diisocyanate and Toluene-2,4-diisocyanate, at least one of 6- diisocyanate.
5. Isocyanate prepolymers body according to claim 1-3, which is characterized in that the amino silane is selected from
At least one of γ aminopropyltriethoxy silane and gamma-amino propyl trimethoxy silicane.
6. a kind of method for preparing the described in any item Isocyanate prepolymers bodies of claim 1-5, which is characterized in that including following
Step:
Isocyanates is mixed with amino silane, under the reaction temperature no more than 40 DEG C, the isocyanates and the amino
Polymerization reaction occurs for silane, and Isocyanate prepolymers body is made.
7. preparation method according to claim 6, which is characterized in that the step of isocyanates is mixed with amino silane
Include:
Amino silane is added dropwise in isocyanates, control time for adding is 1-8 hours, makes the isocyanates and the amino
Silane mixture；Preferably, the time for adding is 4-6 hours.
8. preparation method according to claim 6 or 7, which is characterized in that the reaction temperature is 0-30 DEG C；Preferably,
The reaction temperature is 10-20 DEG C.
9. the described in any item Isocyanate prepolymers bodies of claim 1-5, or by the described in any item preparation sides claim 6-8
The Isocyanate prepolymers body that method obtains is preparing the application in soft polyurethane foam.
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