CN101381442A - Preparation method of TODI base polyurethane micropore elastomer - Google Patents
Preparation method of TODI base polyurethane micropore elastomer Download PDFInfo
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- CN101381442A CN101381442A CNA2007100940750A CN200710094075A CN101381442A CN 101381442 A CN101381442 A CN 101381442A CN A2007100940750 A CNA2007100940750 A CN A2007100940750A CN 200710094075 A CN200710094075 A CN 200710094075A CN 101381442 A CN101381442 A CN 101381442A
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Abstract
The invention discloses a method for producing a polyurethane micropore elastic body taking TODI as an isocyanate component, which aims at improving the heat resistance and wear resistance of the polyurethane micropore elastic body produced by the prior art. The product prepared by the method is mainly used as a high strength damping element bearing dynamic fatigue, such as buffering and damping elements in means of transportation such as automobile, damping blocks in bridges and the like.
Description
Technical field
The present invention relates to a kind of preparation method of microporous polyurethane elastomer, referring in particular to Xylene Diisocyanate (TODI) is the preparation method of the microporous polyurethane elastomer of isocyanate component.
Background technology
Because microporous polyurethane elastomer has good static state and dynamic properties, is specially adapted to make the damping system element that waves under the shock conditions.Their industrial significance depend on its good mechanical property with cheaply, working method combines easily.Use the various chemical structure components of different blended composition and division in a proportion can produce mechanical property and the very big product of processing characteristics difference.
Chinese patent CN1982351A discloses a kind of NDI base polyurethane micropore method for producing elastomers on 06 20th, 2007.This preparation method comprises the steps: the preparation of (1) performed polymer: excessive polyisocyanates and polyvalent alcohol react under 120-140 ℃ of condition, form the performed polymer of end-NCO base; (2) cast: performed polymer and chain extender component are mixed in proportion, react the feed liquid implantation temperature and be in 80-95 ℃ the mould, the demoulding behind the precuring; (3) post curing: the goods after the demoulding were in 110 ℃ of post curing 13-16 hours.
A kind of MDI base polyurethane micropore method for producing elastomers that Chinese patent CN1982352A discloses on 06 20th, 2007.This preparation method comprises the steps: the preparation of (1) performed polymer: excessive polyisocyanates and polyol react under 70-90 ℃ of condition, form the performed polymer of end-NCO base; (2) cast: performed polymer and chain extender component are mixed in proportion, react the feed liquid implantation temperature and be in 80-95 ℃ the mould, the demoulding behind the precuring; (3) post curing: the goods after the demoulding were in 110 ℃ of post curing 13-16 hours.
As everyone knows, good based on the micro-pore elastomer dynamic property of NDI, but have shortcomings such as short such as the performed polymer stable storing phase, that the production cycle is long on its production technique; Though and, performed polymer good stability cheap, advantage such as with short production cycle based on the micro-pore elastomer cost of material of MDI, it also exists, and deformation under the dynamic load is big, the problem of serious wear.Based on this, attempt to find out the simple novel method of a kind of rerum natura excellent production process, address the above problem.
Summary of the invention
Technical problem to be solved by this invention is to propose a kind of TODI base polyurethane micropore method for producing elastomers, to overcome in the prior art, solve based on the micro-pore elastomer poor heat resistance of MDI base, the problem that dynamic fatigue deformation is bigger based on shortcoming on the micro-pore elastomer production technique of NDI.
In order to solve the problems of the technologies described above, the TODI base polyurethane micropore method for producing elastomers that the present invention proposes comprises the steps:
(1) preparation of performed polymer: excessive TODI and polyvalent alcohol react under 100-120 ℃ of condition, form the performed polymer of the end NCO base of NCO content≤10%; It is 2 that described polyvalent alcohol is selected from functionality, the mixture of the polyester adipate of molecular weight 1500-3000, polycaprolactone, polytetrahydrofuran copolyether, polycarbonate, polyetherester copolymer or above-mentioned polyester;
(2) mix, molding: with performed polymer with expand the connection agent by the mixed of 5-20 after implantation temperature be molded in 90-110 ℃ the mould;
(3) post curing: the goods after the demoulding are in 110 ℃ of post curing 14-24hr.
The preferred polyester adipate of polyvalent alcohol described in the above-mentioned steps of the present invention (1); Performed polymer in the step (2) and the reaction of expanding connection agent component adopt the low pressure foaming machine to realize the metering of material, mix and casting process, wherein performed polymer with expand join agent ratio preferably between 6-16.
With respect to prior art, preparation method of the present invention has overcome shortcomings such as existence such as the performed polymer stable storing phase is short on the NDI base micro-pore elastomer production technique, the production cycle is long on the one hand; Also overcome simultaneously problem big based on deformation under the micro-pore elastomer dynamic load of MDI, serious wear.Product by the inventive method preparation is mainly as the high-strength damping element that bears dynamic fatigue, as the bumper and absorbing shock element of the vehicles such as automobile and bridge snubber block etc.
Description of drawings
Fig. 1 is the structural representation that the present invention is used to measure the micro-pore elastomer moulded product of dynamic fatigue property.
Embodiment
Below in conjunction with drawings and Examples the present invention is described in further detail.
The described dynamic fatigue property test result of following embodiment of the present invention and comparative example all obtains by following dynamic fatigue property test:
After the moulded product of shape such as Fig. 1 is in 4KN, 2.0HZ frequency, has air-cooled or do not have under the air-cooled condition circulation 400000 times, characterize tired deformation values, characterize the thermotolerance of product material with goods damaged degree after the compression cycle with height loss's percentage of goods.Dynamic fatigue deformation ratio method of calculation are:
ΔL＝(H
0—H
1)/H
0×100％
Wherein:
Δ L is dynamic fatigue deformation;
H
0Be the goods original height;
H
1Be height after the goods fatigue.
The comparative example 1
Molecular weight is that 2000 polyester adipate and MDI react under 70-100 ℃ of condition, NCO content is 6.2% performed polymer, expand the connection agent based on hexylene glycol, 3% of whipping agent, catalyzer, surfactant comprise total amount.
Adopting the low pressure foaming machine, is 100% ratio in isocyanate index, mixes performed polymer and expands the connection agent, and the reaction feed liquid is injected 90 ℃ mould, and the demoulding behind the 15min is again in 110 ℃ of post curing 24hr.
Above-mentioned moulded product is as follows through 400,000 dynamic fatigue test results:
Embodiment 1
Molecular weight is that 2000 polyester adipate and TODI react under 70-110 ℃ of condition, NCO content is 6.2% performed polymer, expand the connection agent based on polyester adipate, 3% of whipping agent, catalyzer, surfactant comprise total amount.
Adopting the low pressure foaming machine, is 100% ratio in isocyanate index, mixes performed polymer and expands the connection agent, and the reaction feed liquid is injected 110 ℃ mould, and the demoulding behind the 30min is again in 110 ℃ of post curing 24hr.
Above-mentioned moulded product is as follows through 400,000 dynamic fatigue property test results:
The comparative example 2
Molecular weight is that 2000 polyester adipate and NDI react under 100 ~ 140 ℃ of conditions, NCO content is 6.2% performed polymer, expand the connection agent based on hexylene glycol, 3% of whipping agent, catalyzer, surfactant comprise total amount.
Adopting the low pressure foaming machine, is 100% ratio in isocyanate index, mixes performed polymer and expands the connection agent, and the reaction feed liquid is injected 90 ℃ mould, and the demoulding behind the 30min is again in 110 ℃ of post curing 24hr.
Above-mentioned moulded product is as follows through the dynamic fatigue property test result:
Embodiment 2
Molecular weight is that 2000 polyester adipate and TODI react under 70-110 ℃ of condition, NCO content is 6.2% performed polymer, expand the connection agent based on polyester adipate, 3% of whipping agent, catalyzer, surfactant comprise total amount.
Adopting the low pressure foaming machine, is 100% ratio in isocyanate index, mixes performed polymer and expands the connection agent, and the reaction feed liquid is injected 110 ℃ mould, and the demoulding behind the 30min is again in 110 ℃ of post curing 24hr.
Above-mentioned moulded product is as follows through the dynamic fatigue property test result:
Claims (3)
1, a kind of TODI base polyurethane micropore method for producing elastomers is characterized in that this preparation method comprises the steps:
(1) preparation of performed polymer: excessive TODI and polyvalent alcohol react under 100-120 ℃ of condition, form the performed polymer of the end NCO base of NCO content≤10%; It is 2 that described polyvalent alcohol is selected from functionality, the mixture of the polyester adipate of molecular weight 1500-3000, polycaprolactone, polytetrahydrofuran copolyether, polycarbonate, polyetherester copolymer or above-mentioned polyester;
(2) mix, molding: with performed polymer with expand the connection agent by the mixed of 5-20 after implantation temperature be molded in 90-110 ℃ the mould;
(3) post curing: the goods after the demoulding are in 110 ℃ of post curing 14-24hr.
2, TODI base polyurethane micropore method for producing elastomers according to claim 1 is characterized in that, polyvalent alcohol is a polyester adipate.
3, TODI base polyurethane micropore method for producing elastomers according to claim 1 is characterized in that, performed polymer is 6-16 with the ratio that expands the connection agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100940750A CN101381442B (en) | 2007-09-06 | 2007-09-06 | Preparation method of TODI base polyurethane micropore elastomer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100940750A CN101381442B (en) | 2007-09-06 | 2007-09-06 | Preparation method of TODI base polyurethane micropore elastomer |
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| CN101381442A true CN101381442A (en) | 2009-03-11 |
| CN101381442B CN101381442B (en) | 2011-07-20 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102079808A (en) * | 2010-11-30 | 2011-06-01 | 海宁崇舜化工有限公司 | Polyurethane resin for shoes |
| CN102181037A (en) * | 2011-03-27 | 2011-09-14 | 黎明化工研究院 | Method for preparing 3,3'-dimethyl-4,4'-biphenyl diisocyanate (TODI)-based thermoplastic polyurethane elastomer |
| CN102199269A (en) * | 2011-03-21 | 2011-09-28 | 黎明化工研究院 | Heat-resistant thermoplastic polyurethane elastomer and preparation method thereof |
| CN106608960A (en) * | 2015-10-22 | 2017-05-03 | 上海凯众材料科技股份有限公司 | Preparation method of polyurethane microporous elastomer |
| CN109942788A (en) * | 2019-02-21 | 2019-06-28 | 唯万科技有限公司 | Self-lubricating hydrolysis resistant polyurethane elastic material and preparation method thereof |
| CN110951031A (en) * | 2019-12-15 | 2020-04-03 | 安徽匠星联创新材料科技有限公司 | High-hydrolysis-resistance polyurethane damping material and preparation method thereof |
| CN114133523A (en) * | 2021-11-15 | 2022-03-04 | 山东一诺威聚氨酯股份有限公司 | Polyurethane composition for lightweight dynamic impact resistant new energy automobile battery box and preparation method thereof |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1982352A (en) * | 2005-12-15 | 2007-06-20 | 上海凯众聚氨酯有限公司 | Production of MDI-polyurethane microporous elastomer |
| CN100506871C (en) * | 2005-12-15 | 2009-07-01 | 上海凯众聚氨酯有限公司 | Production of NDI-polyurethane microporous elastomer |
-
2007
- 2007-09-06 CN CN2007100940750A patent/CN101381442B/en active Active
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102079808A (en) * | 2010-11-30 | 2011-06-01 | 海宁崇舜化工有限公司 | Polyurethane resin for shoes |
| CN102199269A (en) * | 2011-03-21 | 2011-09-28 | 黎明化工研究院 | Heat-resistant thermoplastic polyurethane elastomer and preparation method thereof |
| CN102199269B (en) * | 2011-03-21 | 2012-08-29 | 黎明化工研究院 | Heat-resistant thermoplastic polyurethane elastomer and preparation method thereof |
| CN102181037A (en) * | 2011-03-27 | 2011-09-14 | 黎明化工研究院 | Method for preparing 3,3'-dimethyl-4,4'-biphenyl diisocyanate (TODI)-based thermoplastic polyurethane elastomer |
| CN102181037B (en) * | 2011-03-27 | 2012-08-08 | 黎明化工研究院 | Method for preparing 3,3'-dimethyl-4,4'-biphenyl diisocyanate (TODI)-based thermoplastic polyurethane elastomer |
| CN106608960A (en) * | 2015-10-22 | 2017-05-03 | 上海凯众材料科技股份有限公司 | Preparation method of polyurethane microporous elastomer |
| CN106608960B (en) * | 2015-10-22 | 2021-01-05 | 上海凯众材料科技股份有限公司 | Preparation method of polyurethane microporous elastomer |
| CN109942788A (en) * | 2019-02-21 | 2019-06-28 | 唯万科技有限公司 | Self-lubricating hydrolysis resistant polyurethane elastic material and preparation method thereof |
| CN110951031A (en) * | 2019-12-15 | 2020-04-03 | 安徽匠星联创新材料科技有限公司 | High-hydrolysis-resistance polyurethane damping material and preparation method thereof |
| CN110951031B (en) * | 2019-12-15 | 2021-12-17 | 安徽匠星联创新材料科技有限公司 | High-hydrolysis-resistance polyurethane damping material and preparation method thereof |
| CN114133523A (en) * | 2021-11-15 | 2022-03-04 | 山东一诺威聚氨酯股份有限公司 | Polyurethane composition for lightweight dynamic impact resistant new energy automobile battery box and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101381442B (en) | 2011-07-20 |
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Owner name: SHANGHAI CARTHANE CO., LTD. Free format text: FORMER NAME: SHANGHAI KAIZHONG POLYURETHANE CO., LTD. |
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Address after: 201201 No. 813 Jianye Road, Shanghai, Pudong New Area Patentee after: SHANGHAI CARTHANE CO., LTD. Address before: 201201 No. 813 Jianye Road, Shanghai, Pudong New Area Patentee before: Shanghai Kaizhong Polyurethane Co., Ltd. |