CN104151518A - Polyurethane sports knee-pad composition and preparation method thereof - Google Patents
Polyurethane sports knee-pad composition and preparation method thereof Download PDFInfo
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- CN104151518A CN104151518A CN201410396936.0A CN201410396936A CN104151518A CN 104151518 A CN104151518 A CN 104151518A CN 201410396936 A CN201410396936 A CN 201410396936A CN 104151518 A CN104151518 A CN 104151518A
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- 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
- C08G18/4804—Two or more polyethers of different physical or chemical nature
- C08G18/4816—Two or more polyethers of different physical or chemical nature mixtures of two or more polyetherpolyols having at least three hydroxy groups
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
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- 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
- C08G18/4009—Two or more macromolecular compounds not provided for in one single group of groups C08G18/42 - C08G18/64
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- 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
- C08G18/4804—Two or more polyethers of different physical or chemical nature
- C08G18/482—Mixtures of polyethers containing at least one polyether containing nitrogen
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- 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
- C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
- C08G18/6552—Compounds of group C08G18/63
- C08G18/6558—Compounds of group C08G18/63 with compounds of group C08G18/32 or polyamines of C08G18/38
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- 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
- C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
- C08G18/66—Compounds of groups C08G18/42, C08G18/48, or C08G18/52
- C08G18/6666—Compounds of group C08G18/48 or C08G18/52
- C08G18/667—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38
- C08G18/6674—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/3203
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
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- C08G2110/00—Foam properties
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- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
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Abstract
The invention relates to a polyurethane sports knee-pad composition and a preparation method thereof. The invention relates to the technical field of polyurethane application. The polyurethane sports knee-pad composition provided by the invention is composed of a component A and a component B. A weight ratio of the component A to the component B is 100:30-60. The raw materials for the component A are special polyether polyol, high-activity polyether polyol, polymer polyol, a chain-extender, a foam stabilizer, a foaming agent, a catalyst, an antioxidant, a light stabilizer and a solid filling material. The raw materials for the component B are polyether polyol, isocyanate and a storage stabilizer. The polyurethane sports knee-pad composition provided by the invention has excellent shock cushioning performance and sport comfortableness. Compared with a traditional protection tool, with the product provided by the invention, protection effect is greatly improved. The invention also provides a preparation method of the polyurethane sports knee-pad composition. First, component A and component B are prepared; the component A and the component B are uniformly mixed manually or by using a manipulator; and the mixture is injected into an aluminum knee-pad mold. The cost is low, and the method is easy to implement.
Description
Technical field
The present invention relates to a kind of polyurethane sport knee-pad composition and method of making the same, belong to urethane applied technical field.
Background technology
Knee is an extremely important position at the volley, is simultaneously again a vulnerable position of more fragile appearance, or a pain and recover slower position extremely when injured.Therefore, need professional protection tool-knee-pad during motion.Knee-pad generally refers to the piece of cloth material for the protection of people's knee, and in modern sport games, the use that is specifically designed to the elbow protector for sports of Sports Field is more widely.The elbow protector for sports of traditional sense is generally thick felt material " knee-pad "; be merely able to reduce to a certain extent or avoid injured in moving process; for sporter's impact energy that knee is subject at the volley, can not effectively absorb dispersion, thereby make elbow protector for sports there is certain limitation for the protection of sporter's knee.
Summary of the invention
The object of this invention is to provide a kind of polyurethane sport knee-pad composition, it has good antidetonation resiliency and motion comfortableness, compares with traditional protection tool, has greatly improved protection effect; The present invention provides simple preparation method simultaneously.
Polyurethane sport knee-pad composition of the present invention, is comprised of A component and B component, and the weight ratio of A, B component is 100: 30-60, wherein:
(1) A component is comprised of the component of following parts by weight:
Special polyether polyvalent alcohol: 50-85 part,
Polyether polyol with high activity: 5-30 part,
Polymer polyatomic alcohol: 5-30 part,
Chainextender: 0.1-1.5 part,
Suds-stabilizing agent: 0.1-1.5 part,
Whipping agent: 2.5-4.5 part,
Catalyzer: 0.1-2.5 part,
Oxidation inhibitor: 0.1-5.0 part,
Photostabilizer: 0.1-5.0 part,
Solid filler: 0.1-5.0 part;
The hydroxyl value of described special polyether polyvalent alcohol is 270～320mgKOH/g, functionality is 2.9～3.1, using two or more in propylene glycol, glycerol, glycol ether or TriMethylolPropane(TMP) as mixing initiator, by 1,2-propylene oxide ring-opening polymerization or obtain with oxyethane copolymerization, wherein mass content≤20% of oxyethane;
(2) B component is comprised of the component of following parts by weight:
Polyether glycol: 20-60 part,
Isocyanic ester: 40-80 part,
Storage stabilizing agent: account for 0.001% of B component gross weight.
Described special polyether polyvalent alcohol is for polyurethane composition of the present invention, prepared polyurethane sport knee-pad goods have excellent antidetonation resiliency and motion comfortableness, be subject to after External Force Acting, noresidue distortion, also has the properties such as excellent low temperature kindliness, buffering, sound insulation, sealing in addition.
Preferred proportion of primary OH groups >=70% of polyether polyol with high activity in described A component, number-average molecular weight is 4000～8000, that to take one or more in glycerol, trolamine or TriMethylolPropane(TMP) be initiator, with the polyoxytrimethylene trivalent alcohol of ethylene oxide-capped.Polyether polyol with high activity is for polyurethane composition of the present invention, prepared polyurethane sport knee-pad goods have advantages of active high, demould time is short, can effectively improve the load, rebound resilience of polyurethane product etc.
In described A component, polymer polyatomic alcohol belongs to organic filled polyol, for the production of high-mechanic or high-modulus is soft or semi-hard polyurethane foam plastic goods.By adding this kind of organic filling polyethers, can production density low and porous plastics that load is high, not only reached hardness requirement but also conservation.Polymer polyatomic alcohol is preferably POP36/28, POP93/28 that Shandong blue star Dong great chemical company produces or one or more in HPOP40.
In described A component chainextender be can with polymer chain on functional group reactions and small molecule alcohol or amine that molecular chain expansion, molecular weight are increased, chainextender is preferably ethylene glycol, Diethylene Glycol, propylene glycol, 1, one or more in 4-butyleneglycol or 1,6-hexylene glycol.
In described A component, suds-stabilizing agent claims again foam stabilizer, play a part emulsification foam material, stable foam and adjusting abscess, suds-stabilizing agent is preferably polysiloxane-olefin oxide segmented copolymer, DC193, the DC5125 that more preferably U.S.'s aerification chemical product company produces or one or more in DC6070.
In described A component, whipping agent makes viscoelastic foam material expand, foam, solidify, and obtains urethane foam, and whipping agent is preferably water.
In described A component, catalyzer can Reaction time shorten, enhances productivity, and optionally promotes positive reaction, suppresses side reaction, makes foamable reaction and gel reaction reach required balance.Catalyzer is preferably Dabco 8154, Dabco BL-17 that U.S. aerification chemical product company produces or one or more in Dabco33LV.
In described A component, oxidation inhibitor mainly prevents the thermal-oxidative degradation of urethane, and oxidation inhibitor is preferably one or more in Chinox TP-10H, Chinox TP-22, Chinox TP-25 or the Chinox TP-35 that Taiwan Shuan Jian chemical company produces.
In described A component, photostabilizer mainly prevents from or alleviates urethane, under long-term sun exposure, xanthochromia is occurring, and photostabilizer is preferably Chisorb B2652, Chisorb B2689 that Taiwan Shuan Jian chemical company produces or one or more in Chisorb B2690.
In described A component, solid filler mainly plays a part to reduce production of articles cost and improves and strengthens urethane intensity, and solid filler is preferably the activated Calcium carbonate of median size≤37 micron, whiteness >=90 degree.
In described B component polyether glycol not only raw material be easy to get, with low cost, and the urethane foam performance of making is good, is the polyvalent alcohol raw material of urethane foam industry consumption maximum.Polyether glycol is preferably EP-3033, EP-240 that Shandong blue star Dong great chemical company produces or one or more in ED-28.
In described B component, isocyanic ester is the important foundation raw material of synthesis of polyurethane, and raw material sources are extensive, has good economy, and the physical property of product is good.Storage stabilizing agent can stop the side reaction of isocyanic ester, can improve the stability in storage of product.Isocyanic ester is preferably one or more in Lupranate M, Lupranate LP30, Lupranate MM103C or the Lupranate M20S that BASF Aktiengesellschaft produces; Storage stabilizing agent is phosphoric acid or Benzoyl chloride.
The preparation method of described polyurethane sport knee-pad composition, comprises the following steps:
(1) prepare A component: first load weighted special polyether polyvalent alcohol, polyether polyol with high activity, polymer polyatomic alcohol are dropped in reactor and stirred, then the chainextender, catalyzer, whipping agent, suds-stabilizing agent, photostabilizer, oxidation inhibitor, the solid filler that add accurate measurement, under normal temperature, after physical agitation 3-4 hour, make A component standby;
(2) prepare B component: will under load weighted polyether glycol normal temperature, drop in reactor and stir, rise to after 80 ℃-100 ℃, dewater degassed, then be cooled to 10～40 ℃ and add the storage stabilizing agent measuring, and drop into isocyanic ester, be warming up to 80-85 ℃ of reaction 2-3 hour, be cooled to after 10～40 ℃, make B component standby;
(3) under room temperature, A, B component material are carried out to the mechanical or manual evenly rear aluminum elbow protector for sports mould that injects that is mixed to, through the normal temperature slaking demoulding in 2-10 minute, obtain polyurethane sport knee-pad composition.
In step (2), be evacuated to vacuum tightness≤0.098MPa, the degassed 2-3 hour that dewaters, moisture content≤0.05%.
The present invention has following beneficial effect:
(1) A, B component are to be at normal temperatures liquid state to store, not only save energy but also reduce loaded down with trivial details operation;
(2) in formulating of recipe, adopt full water foamedly, its ozone layer destroying effect ODP value is zero, and asepsis environment-protecting, is a kind of environmental friendliness shaped material;
(3) special polyether polyvalent alcohol and polyether polyol with high activity are successfully applied in polyurethane sport knee-pad composition, prepared polyurethane sport knee-pad goods have excellent antidetonation resiliency and motion comfortableness, thereby for to avoid the security that joint sustains damage at the volley to provide safeguard, compare with traditional protection tool, greatly improved protection effect;
(4) polyurethane product obtaining, except having excellent antidetonation resiliency and motion comfortableness, also has the properties such as excellent low temperature kindliness, sound insulation, sealing in addition.
(5) preparation method of polyurethane sport knee-pad composition of the present invention, is simple and easy to implement, and is beneficial to suitability for industrialized production.
Embodiment
Below in conjunction with embodiment, the present invention is further illustrated, but it does not limit enforcement of the present invention.
Except special polyether polyvalent alcohol and polyether polyol with high activity, other raw materials used are commercially available prod.
Embodiment 1:
(1) prepare A component material:
Weigh respectively: (hydroxyl value is 270mgKOH/g to special polyether polyvalent alcohol, functionality is 2.9, the mixture of propylene glycol and glycerol of take is initiator) 50Kg, (proportion of primary OH groups is 70% to polyether polyol with high activity, number-average molecular weight is 4000, take glycerol as initiator) 30Kg, polymer polyatomic alcohol POP93/28 is 20Kg, chainextender Diethylene Glycol 1.2Kg, suds-stabilizing agent DC5125 is 1.2Kg, water 3.0Kg, catalyzer Dabco 8154 is 1.3Kg, oxidation inhibitor Chinox TP-22 is 4.1Kg, photostabilizer Chisorb B2652 is 1.4Kg, superfine activated calcium carbonate is 2.0Kg.Load weighted special polyether polyvalent alcohol, polyether polyol with high activity, polymer polyatomic alcohol material are dropped in reactor and stirred, then drop into respectively chainextender, catalyzer, foam foaming agent, suds-stabilizing agent, photostabilizer, oxidation inhibitor, the solid filler of accurate measurement, physical agitation is 3.0 hours at normal temperatures, blowing barrelling warehouse-in from reactor.
(2) prepare B component material:
To under polyether glycol EP-303320Kg normal temperature, add reactor, rise to 80 ℃ of stirrings, vacuumize (vacuum tightness≤0.098MPa) dewater degassed (moisture content 0.05%) 2.0 hours, be cooled to 10 ℃ and add 0.001Kg storage stabilizing agent phosphoric acid, drop into the Lupranate M measuring is 80Kg simultaneously, 80 ℃ are reacted 2.0 hours, are cooled to 40 ℃, barrelling warehouse-in.
(3) while using, under room temperature by A, B component material by A: B=100: 30 weight proportion carries out mechanically mixing to injection aluminum elbow protector for sports mould after evenly, through the normal temperature slaking demoulding in 3 minutes, can be processed into goods.
Embodiment 2:
(1) prepare A component material:
Weigh respectively: (hydroxyl value is 320mgKOH/g to special polyether polyvalent alcohol, functionality is 3.1, the mixture of propylene glycol and glycol ether of take is initiator) 65Kg, (proportion of primary OH groups is 70% to polyether polyol with high activity, number-average molecular weight is 8000, the mixture of glycerol and trolamine of take is initiator) 20Kg, polymer polyatomic alcohol POP36/28 is 20Kg, chainextender 1, 4-butyleneglycol 0.6Kg, suds-stabilizing agent DC193 is 0.1Kg, water 2.5Kg, catalyzer Dabco 33LV is 2.5Kg, oxidation inhibitor Chinox TP-10H is 1.6Kg, photostabilizer is the mixture of 1.1Kg Chisorb B2690 and 1.1Kg Chisorb B2652, superfine activated calcium carbonate is 4.0Kg.Load weighted special polyether polyvalent alcohol, polyether polyol with high activity, polymer polyatomic alcohol material are dropped in reactor and stirred, then drop into respectively chainextender, catalyzer, foam foaming agent, suds-stabilizing agent, photostabilizer, oxidation inhibitor, the solid filler of accurate measurement, physical agitation is 3.5 hours at normal temperatures, blowing barrelling warehouse-in from reactor.
(2) prepare B component material:
To under polyether glycol EP-24040Kg normal temperature, add reactor, rise to 85 ℃ of stirrings, vacuumize (vacuum tightness≤0.098MPa) dewater degassed (moisture content 0.05%) 2.5 hours, be cooled to 20 ℃ and add 0.001Kg storage stabilizing agent phosphoric acid, drop into the Lupranate LP30 measuring is 60Kg simultaneously, 82 ℃ are reacted 2.5 hours, are cooled to 30 ℃, barrelling warehouse-in.
(3) while using, under room temperature by A, B component material by A: B=100: 45 weight proportion carries out mechanically mixing to injection aluminum elbow protector for sports mould after evenly, through the normal temperature slaking demoulding in 5 minutes, can be processed into goods.
Embodiment 3:
(1) prepare A component material:
Weigh respectively: (hydroxyl value is 300mgKOH/g to special polyether polyvalent alcohol, functionality is 3.0, with propylene glycol, the mixture of glycerol and TriMethylolPropane(TMP) is initiator) 80Kg, (proportion of primary OH groups is 75% to polyether polyol with high activity, number-average molecular weight is 5000, take TriMethylolPropane(TMP) as initiator) 10Kg, polymer polyatomic alcohol HPOP40 is 8Kg, chainextender is 0.2Kg 1, 6-hexylene glycol, the mixture of 0.5Kg ethylene glycol and 0.5Kg propylene glycol, suds-stabilizing agent DC6070 is 0.2Kg, water 4.5Kg, catalyzer is the mixture of 1.5Kg Dabco 33LV and 1Kg Dabco BL-17, oxidation inhibitor Chinox TP-35 is 1.6Kg, photostabilizer Chisorb B2689 is 2.2Kg, superfine activated calcium carbonate is 5.0Kg.Load weighted special polyether polyvalent alcohol, polyether polyol with high activity, polymer polyatomic alcohol material are dropped in reactor and stirred, then drop into respectively chainextender, catalyzer, foam foaming agent, suds-stabilizing agent, photostabilizer, oxidation inhibitor, the solid filler of accurate measurement, physical agitation is 4.0 hours at normal temperatures, blowing barrelling warehouse-in from reactor.
(2) prepare B component material:
To under polyether glycol ED-2860Kg normal temperature, add reactor, rise to 90 ℃ of stirrings, vacuumize (vacuum tightness≤0.098MPa) dewater degassed (moisture content 0.05%) 3.0 hours, be cooled to 30 ℃ and add 0.001Kg storage stabilizing agent phosphoric acid, drop into the Lupranate MM103C measuring is 40Kg simultaneously, 85 ℃ are reacted 3.0 hours, are cooled to 20 ℃, barrelling warehouse-in.
(3) while using, under room temperature by A, B component material by A: B=100: 60 weight proportion carries out mechanically mixing to injection aluminum elbow protector for sports mould after evenly, through the normal temperature slaking demoulding in 8 minutes, can be processed into goods.
Embodiment 4:
(1) prepare A component material:
Weigh respectively: (hydroxyl value is 290mgKOH/g to special polyether polyvalent alcohol, functionality is 3.0, the mixture of glycol ether and TriMethylolPropane(TMP) of take is initiator) 85Kg, (proportion of primary OH groups is 72% to polyether polyol with high activity, number-average molecular weight is 6000, with glycerol, the mixture of trolamine and TriMethylolPropane(TMP) is initiator) 10Kg, polymer polyatomic alcohol is the mixture of 4Kg HPOP40 and 4Kg POP93/28, chainextender propylene glycol 1.5Kg, suds-stabilizing agent DC6070 is 0.2Kg, water 3.2Kg, catalyzer Dabco BL-17 is 2.2Kg, oxidation inhibitor is the mixture of 0.6Kg Chinox TP-10H and 1Kg Chinox TP-25, photostabilizer Chisorb B2690 is 2.2Kg, superfine activated calcium carbonate is 2.0Kg.Load weighted special polyether polyvalent alcohol, polyether polyol with high activity, polymer polyatomic alcohol material are dropped in reactor and stirred, then drop into respectively chainextender, catalyzer, foam foaming agent, suds-stabilizing agent, photostabilizer, oxidation inhibitor, the solid filler of accurate measurement, physical agitation is 3.5 hours at normal temperatures, blowing barrelling warehouse-in from reactor.
(2) prepare B component material:
To under the polyether glycol mixture normal temperature of 10Kg EP-3033 and 25Kg EP-240, add reactor, rise to 100 ℃ of stirrings, vacuumize (vacuum tightness≤0.098MPa) dewater degassed (moisture content 0.05%) 2.5 hours, be cooled to 40 ℃ and add 0.001Kg storage stabilizing agent Benzoyl chloride, drop into the Lupranate M20S measuring is 65Kg simultaneously, 85 ℃ are reacted 2.5 hours, are cooled to 10 ℃, barrelling warehouse-in.
(3) while using, under room temperature by A, B component material by A: B=100: 55 weight proportion carries out mechanically mixing to injection aluminum elbow protector for sports mould after evenly, through the normal temperature slaking demoulding in 8 minutes, can be processed into goods.
Comparative example 1:
(1) prepare A component material:
Weigh respectively: (proportion of primary OH groups is 70% to polyether polyol with high activity, number-average molecular weight is 4000, take glycerol as initiator) 95Kg, polymer polyatomic alcohol HPOP40 is 8Kg, chainextender propylene glycol 1.3Kg, suds-stabilizing agent DC6070 is 0.1Kg, water 3.5Kg, catalyzer Dabco 33LV is 2.0Kg, oxidation inhibitor Chinox TP-10H is 1.3Kg, photostabilizer Chisorb B2690 is 2.0Kg, and superfine activated calcium carbonate is 1.8Kg.Load weighted special polyether polyvalent alcohol, polyether polyol with high activity, polymer polyatomic alcohol material are dropped in reactor and stirred, then drop into respectively chainextender, catalyzer, foam foaming agent, suds-stabilizing agent, photostabilizer, oxidation inhibitor, the solid filler of accurate measurement, physical agitation is 3.5 hours at normal temperatures, blowing barrelling warehouse-in from reactor.
(2) prepare B component material:
By polyether glycol EP-3033, be to add reactor under 35Kg normal temperature, rise at 100 ℃ and stir, vacuumize (vacuum tightness≤0.098MPa) dewater degassed (moisture content 0.05%) 2.5 hours, be cooled to 40 ℃ of storage stabilizing agent phosphoric acid that add accurate measurement (account for B component gross weight 0.001%), drop into the Lupranate M measuring is 65Kg simultaneously, 85 ℃ are reacted 2.5 hours, are cooled to 10 ℃, barrelling warehouse-in.
(3) while using, under room temperature by A, B component material by A: B=100: 55 weight proportion carries out mechanically mixing to injection aluminum elbow protector for sports mould after evenly, through the normal temperature slaking demoulding in 8 minutes, can be processed into goods.
It is as follows that table 1 embodiment 1-4 and comparative example 1 make the performance test of product:
Note: Mechanics Performance Testing adopts GB/T 528-1998 to test.
Claims (10)
1. a polyurethane sport knee-pad composition, is characterized in that: A component and B component, consist of, the weight ratio of A, B component is 100: 30-60, wherein:
(1) A component is comprised of the component of following parts by weight:
Special polyether polyvalent alcohol: 50-85 part,
Polyether polyol with high activity: 5-30 part,
Polymer polyatomic alcohol: 5-30 part,
Chainextender: 0.1-1.5 part,
Suds-stabilizing agent: 0.1-1.5 part,
Whipping agent: 2.5-4.5 part,
Catalyzer: 0.1-2.5 part,
Oxidation inhibitor: 0.1-5.0 part,
Photostabilizer: 0.1-5.0 part,
Solid filler: 0.1-5.0 part;
The hydroxyl value of described special polyether polyvalent alcohol is 270～320mgKOH/g, functionality is 2.9～3.1, using two or more in propylene glycol, glycerol, glycol ether or TriMethylolPropane(TMP) as mixing initiator, by 1,2-propylene oxide ring-opening polymerization or obtain with oxyethane copolymerization, wherein mass content≤20% of oxyethane;
(2) B component is comprised of the component of following parts by weight:
Polyether glycol: 20-60 part,
Isocyanic ester: 40-80 part,
Storage stabilizing agent: account for 0.001% of B component gross weight.
2. polyurethane sport knee-pad composition according to claim 1, it is characterized in that: proportion of primary OH groups >=70% of polyether polyol with high activity, number-average molecular weight is 4000～8000, that to take one or more in glycerol, trolamine or TriMethylolPropane(TMP) be initiator, the polyoxytrimethylene trivalent alcohol obtaining by ethylene oxide-capped.
3. polyurethane sport knee-pad composition according to claim 1, is characterized in that: polymer polyatomic alcohol is one or more in POP36/28, POP93/28 or HPOP40.
4. polyurethane sport knee-pad composition according to claim 1, is characterized in that: chainextender is one or more in ethylene glycol, Diethylene Glycol, propylene glycol, BDO or 1,6-hexylene glycol; Suds-stabilizing agent is polysiloxane-olefin oxide segmented copolymer; Whipping agent is water.
5. polyurethane sport knee-pad composition according to claim 1, is characterized in that: catalyzer is one or more in Dabco 8154, Dabco BL-17 or Dabco33LV; Oxidation inhibitor is one or more in Taiwan Shuan Jian chemical company Chinox TP-10H, the Chinox TP-22, Chinox TP-25 or the Chinox TP-35 that produce; Photostabilizer is Taiwan Shuan Jian chemical company the Chisorb B2652, the Chisorb B2689 that produce or one or more in Chisorb B2690.
6. polyurethane sport knee-pad composition according to claim 1, is characterized in that: solid filler is the activated Calcium carbonate of median size≤37 micron, whiteness >=90 degree.
7. polyurethane sport knee-pad composition according to claim 1, is characterized in that: polyether glycol is Shandong blue star Dong great the chemical company EP-3033, the EP-240 that produce or one or more in ED-28.
8. polyurethane sport knee-pad composition according to claim 1, is characterized in that: isocyanic ester is one or more in BASF Aktiengesellschaft Lupranate M, the Lupranate LP30, Lupranate MM103C or the Lupranate M20S that produce; Storage stabilizing agent is phosphoric acid or Benzoyl chloride.
9. a preparation method for the arbitrary described polyurethane sport knee-pad composition of claim 1-8, is characterized in that comprising the following steps:
(1) prepare A component: first load weighted special polyether polyvalent alcohol, polyether polyol with high activity, polymer polyatomic alcohol are stirred, then the chainextender, catalyzer, whipping agent, suds-stabilizing agent, photostabilizer, oxidation inhibitor, the solid filler that add accurate measurement, under normal temperature, stir 3-4 hour, make A component standby;
(2) prepare B component: will under load weighted polyether glycol normal temperature, stir, rise to after 80 ℃-100 ℃, dewater degassed, then be cooled to 10～40 ℃, add the storage stabilizing agent measuring, and drop into isocyanic ester, be warming up to 80-85 ℃ of reaction 2-3 hour, be cooled to 10～40 ℃, make B component standby;
(3) under room temperature, A, B component material are mixed, then inject aluminum elbow protector for sports mould, the slaking demoulding obtains polyurethane sport knee-pad composition.
10. the preparation method of polyurethane sport knee-pad composition according to claim 9, is characterized in that: in step (2), be evacuated to vacuum tightness≤0.098MPa, the degassed 2-3 hour that dewaters, moisture content≤0.05%.
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