CN103626952A - Synthesis method of low-hardness and hydrolysis-resistant polyurethane elastomer - Google Patents

Synthesis method of low-hardness and hydrolysis-resistant polyurethane elastomer Download PDF

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Publication number
CN103626952A
CN103626952A CN201210303756.4A CN201210303756A CN103626952A CN 103626952 A CN103626952 A CN 103626952A CN 201210303756 A CN201210303756 A CN 201210303756A CN 103626952 A CN103626952 A CN 103626952A
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component
temperature
product
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付显选
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Shanghai Bao Heavy Machinery Engineering (group) Co Ltd
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Shanghai Bao Heavy Machinery Engineering (group) Co Ltd
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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
    • C08G18/40—High-molecular-weight compounds
    • C08G18/48—Polyethers
    • C08G18/4854—Polyethers containing oxyalkylene groups having four carbon atoms in the alkylene group
    • 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
    • C08G18/3802—Low-molecular-weight compounds having heteroatoms other than oxygen having halogens
    • C08G18/3814—Polyamines
    • 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
    • C08G18/65—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
    • C08G18/6681—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/32 or C08G18/3271 and/or polyamines of C08G18/38
    • C08G18/6685—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/32 or C08G18/3271 and/or polyamines of C08G18/38 with compounds of group C08G18/3225 or polyamines of C08G18/38

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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 relates to a synthesis method of a low-hardness and hydrolysis-resistant polyurethane elastomer. The synthesis method comprises the following technical steps: (1) synthesis of polyurethane A component: dehydrating polyether polyol PTMG-1000 at a temperature of 100 to 120 DEG C for 1.5 to 2.5 hours, cooling to a temperature of 50 to 60 DEG C, adding isocyanate, mixing, stirring for 1 to 2 hours, controlling the temperature in a range of 80 to 100 DEG C, defoaming until no bubble exists under a vacuum degree which is more than 0.07 Mpa, cooling, then storing the product in an enclosed container filled with nitrogen gas; (2) synthesis of polyurethane B component: dehydrating polyether polyol PTMG-650 at a temperature of 100 to 120 for 1.5 to 2.5 hours, cooling to a temperature of 80 to 100 DEG C, adding MOCA, evenly mixing, completely defoaming in vacuum, cooling, and then storing the product in an enclosed container filled with nitrogen gas; (3) material combination: separately putting and heating the polyurethane A component and the polyurethane B component in a oven at a temperature of 80 to 90 DEG C, when the A component and the B component are completely heated, mixing the component A and the component B, immediately pouring the mixture into a mould, closing the mould, placing the mould into a oven to carry out sulfuration reactions, demoulding after a half hour, then putting the product in the oven to go on carrying out sulfuration reactions for 15 to 17 hours at a temperature of 80 to 90 DEG C, and finally the product is stored under a normal temperature.

Description

The elastomeric synthetic method of soft hydrolysis resistant polyurethane
Technical field
The present invention relates to a kind of method for synthesizing urethane elastomer.
Background technology
Generally, under water surrounding or the larger operating mode of humidity, can greatly shorten the work-ing life of polyurethane products, and the wear resisting property of the polyurethane elastomer under water surrounding also has test.
The elastomeric mechanical property of current PAUR is superior, but water resistance is very poor; The elastomeric mechanical property relative mistake of polyether-polyurethane, but low-temperature performance and anti-hydrolytic performance are good.Existing a large amount of polyurethane products can not meet operating mode and the product requirement of various complexity, and the product that can meet the demands is higher to price, are difficult to meet consumers' demand, and Specific construction is complicated.
Summary of the invention
The technical issues that need to address of the present invention have been to provide the elastomeric synthetic method of a kind of soft hydrolysis resistant polyurethane, are intended to solve the above problems.
In order to solve the problems of the technologies described above, the present invention realizes by following technological step:
Synthesizing of urethane A component:
Polyether glycol PTMG-1000, at 100-120 ℃ of dehydration 1.5-2.5 hour, is cooled to 50-60 ℃, adds isocyanic ester, mix and blend 1-2 hour, controls temperature between 80-100 ℃, under vacuum tightness is greater than 0.07Mpa, takes off to still, after cooling, seal up for safekeeping, with nitrogen protection;
Synthesizing of urethane B component:
Polyether glycol PTMG-650, at 100-120 ℃ of dehydration 1.5-2.5 hour, is cooled to 80-100 ℃, adds 3,3'-bis-chloro-4,4'-diaminodiphenyl-methane (MOCA), mixes, and vacuum defoamation is complete, seals up for safekeeping after cooling, with nitrogen protection;
Material combination:
Get the interior heating of baking oven of a certain amount of 80-90 of being positioned over ℃ of urethane A component, get the interior heating of baking oven of a certain amount of 80-90 of being placed in ℃ of urethane B component, after A, the heating completely of B component, mix, after mixing, pour into immediately in mould, matched moulds, put into baking oven sulfuration, the demoulding after half an hour, continues product to be positioned in baking oven, at 80-90 ℃, vulcanize 15-17 hour, product is taken out to normal temperature placement and after at least seven days, just allow to use; Described A component=100 gram, A component: B component=250:102.06.
Compared with prior art, the invention has the beneficial effects as follows: can make the PU products meet under various water surroundings and the larger operating mode of humidity or product and use, avoid cost waste.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail:
The present invention realizes by following technological step:
Synthesizing of urethane A component:
Polyether glycol PTMG-1000, at 100-120 ℃ of dehydration 1.5-2.5 hour, is cooled to 50-60 ℃, adds isocyanic ester, mix and blend 1-2 hour, controls temperature between 80-100 ℃, under vacuum tightness is greater than 0.07Mpa, takes off to still, after cooling, seal up for safekeeping, with nitrogen protection;
Synthesizing of urethane B component:
Polyether glycol PTMG-650, at 100-120 ℃ of dehydration 1.5-2.5 hour, is cooled to 80-100 ℃, adds 3,3'-bis-chloro-4,4'-diaminodiphenyl-methane (MOCA), mixes, and vacuum defoamation is complete, seals up for safekeeping after cooling, with nitrogen protection;
Material combination:
Get the interior heating of baking oven of a certain amount of 80-90 of being positioned over ℃ of urethane A component, get the interior heating of baking oven of a certain amount of 80-90 of being placed in ℃ of urethane B component, after A, the heating completely of B component, mix, after mixing, pour into immediately in mould, matched moulds, put into baking oven sulfuration, the demoulding after half an hour, continues product to be positioned in baking oven, at 80-90 ℃, vulcanize 15-17 hour, product is taken out to normal temperature placement and after at least seven days, just allow to use; Described A component=100 gram, A component: B component=250:102.06.
The polyether glycol PTMG-1000 adopting in the present invention, polyether glycol PTMG-650 and 3,3'-bis-are chloro-4, and 4'-diaminodiphenyl-methane (MOCA) is all product of the prior art.
Performance test
Hardness is pressed GB/T531-1999 test; Tensile strength, elongation at break are pressed GB/T528-1998 test; Tear strength is pressed GB/T529-1999 test.Solvent resistance testing method: sample is cut into 35mm * 25mm * 2mrn sample piece, at 25 ℃ of temperature, measures the aerial quality of sample piece; Then by sample piece under normal temperature (25 ℃), with temperature be at 60 ℃, be sidelong in water, soak respectively after 60h, measure the aerial quality of sample piece.
h=(M n-M 0)/M 0
Wherein, Mn is airborne quality after soaking, M 0for soaking front airborne quality, h is the mass change after soaking.
The performance test results
National standard performance perameter
Figure BDA00002049534400031
Test data
Figure BDA00002049534400032
Sample anti-hydrolytic performance (60h)
Classification Quality/g in air Quality/g after soaking
In 25 ℃ of water 2.1096 2.1098
In 60 ℃ of water 1.8650 1.8910
1. in 25 ℃ of water, h=0.0095%
2. in 60 ℃ of water, h=1.3941%
The present invention is elastomeric synthetic by a kind of soft hydrolysis resistant polyurethane, and the polyurethane products use face of realizing soft anti-hydrolytic performance is widened, competent more complicated operating mode and product requirement.After this polyurethane elastomer synthetic, the product use face of producing will be more wide, not only can meet soft requirement, superior on water resistance, the work-ing life that more can improve product.
The present invention can be in order to be manufactured with the sealing member of contact water, and it is high with metalwork fitness that soft can reach, good seal performance, and the raising of anti-hydrolytic performance can improve the work-ing life of sealing member, durable.
The present invention can make in order to bolster, the polyurethane product of soft can play good buffering effect, especially in the open in operating environment, the bolster of this hydrolysis can be made by the high urethane of enough anti-hydrolytic performances, can strengthen greatly work-ing life, in addition this formula has very strong mechanical property, can meet the operating mode of relative complex, has more widened use face.
The present invention can be in order to make rubber covered roll, high for requiring anti-hydrolytic performance, long service life, and the making of the rubber covered roll that transmission is effective, strong anti-hydrolytic performance, wear resisting property, mechanical property can give rubber covered roll strong mechanical property and work-ing life.

Claims (1)

1. the elastomeric synthetic method of soft hydrolysis resistant polyurethane, realizes by following technological step:
Synthesizing of urethane A component:
Polyether glycol PTMG-1000, at 100-120 ℃ of dehydration 1.5-2.5 hour, is cooled to 50-60 ℃, adds isocyanic ester, mix and blend 1-2 hour, controls temperature between 80-100 ℃, under vacuum tightness is greater than 0.07Mpa, takes off to still, after cooling, seal up for safekeeping, with nitrogen protection;
Synthesizing of urethane B component:
Polyether glycol PTMG-650, at 100-120 ℃ of dehydration 1.5-2.5 hour, is cooled to 80-100 ℃, adds 3,3'-bis-chloro-4,4'-diaminodiphenyl-methane, mixes, and vacuum defoamation is complete, seals up for safekeeping after cooling, with nitrogen protection;
Material combination:
Get the interior heating of baking oven of a certain amount of 80-90 of being positioned over ℃ of urethane A component, get the interior heating of baking oven of a certain amount of 80-90 of being placed in ℃ of urethane B component, after A, the heating completely of B component, mix, after mixing, pour into immediately in mould, matched moulds, put into baking oven sulfuration, the demoulding after half an hour, continues product to be positioned in baking oven, at 80-90 ℃, vulcanize 15-17 hour, product is taken out to normal temperature placement and after at least seven days, just allow to use; Described A component=100 gram, A component: B component=250:102.06.
CN201210303756.4A 2012-08-23 2012-08-23 Synthesis method of low-hardness and hydrolysis-resistant polyurethane elastomer Pending CN103626952A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104530381A (en) * 2014-12-29 2015-04-22 成都瑞吉龙科技有限责任公司 Coated insulating material for overall insulation of railway switch installation device
CN106866926A (en) * 2017-02-24 2017-06-20 耿佃勇 Polyurethane elastomer soft axle transmission core and preparation method thereof
CN108285521A (en) * 2018-01-31 2018-07-17 廊坊市建科汇峰科技有限公司 A kind of polyurethane sealing material and its preparation method and application

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5059671A (en) * 1988-12-28 1991-10-22 Mitsui Toatsu Chemicals, Inc. Manufacturing process of spray urethane elastomer
CN102585162A (en) * 2011-12-23 2012-07-18 山东东大一诺威聚氨酯有限公司 Microporous polyurethane elastomer compound with excellent dynamic performance and preparation method thereof
CN102604038A (en) * 2012-03-01 2012-07-25 深圳市乐普泰科技股份有限公司 Transparent polyurethane elastomer and preparation method as well as application

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Publication number Priority date Publication date Assignee Title
US5059671A (en) * 1988-12-28 1991-10-22 Mitsui Toatsu Chemicals, Inc. Manufacturing process of spray urethane elastomer
CN102585162A (en) * 2011-12-23 2012-07-18 山东东大一诺威聚氨酯有限公司 Microporous polyurethane elastomer compound with excellent dynamic performance and preparation method thereof
CN102604038A (en) * 2012-03-01 2012-07-25 深圳市乐普泰科技股份有限公司 Transparent polyurethane elastomer and preparation method as well as application

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Title
刘锦春等: "四氢呋喃聚醚型聚氨酯弹性体力学性能的研究", 《弹性体》 *
刘锦春等: "影响MDI体系聚氨酯弹性体性能的因素", 《塑料工业》 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104530381A (en) * 2014-12-29 2015-04-22 成都瑞吉龙科技有限责任公司 Coated insulating material for overall insulation of railway switch installation device
CN106866926A (en) * 2017-02-24 2017-06-20 耿佃勇 Polyurethane elastomer soft axle transmission core and preparation method thereof
CN108285521A (en) * 2018-01-31 2018-07-17 廊坊市建科汇峰科技有限公司 A kind of polyurethane sealing material and its preparation method and application

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Application publication date: 20140312