CN105566604A - Synthesis method of polyether urethane elastomers - Google Patents
Synthesis method of polyether urethane elastomers Download PDFInfo
- Publication number
- CN105566604A CN105566604A CN201510761738.4A CN201510761738A CN105566604A CN 105566604 A CN105566604 A CN 105566604A CN 201510761738 A CN201510761738 A CN 201510761738A CN 105566604 A CN105566604 A CN 105566604A
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- CN
- China
- Prior art keywords
- performed polymer
- polyurethane elastomer
- urethane elastomers
- polyether
- synthesis performed
- Prior art date
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/08—Processes
- C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
-
- C—CHEMISTRY; METALLURGY
- 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
- C08G18/4833—Polyethers containing oxyethylene units
-
- 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
- C08G18/6674—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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- 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 belongs to the field of polyurethane elastomer preparation and provides a synthesis method of polyether urethane elastomers. The synthesis method includes using polyether polyhydric alcohol, 4, 4'-diphenylmethane diisocyanate and 1, 4-butanediol as raw materials to synthesize the polyether urethane elastomers. The polyether urethane elastomers prepared by the method reach 60 in Shore A hardness, 650% in elongation at break, 30.1 MPa in tensile strength and 60 Kn m<-1> in tearing strength.
Description
Technical field
The invention belongs to polyurethane elastomer preparation field.
Background technology
Polyurethane elastomer (PUE) is also known as polyurethane elastomer, it is the high molecular synthetic material containing more carbamate groups on a kind of main chain, general by oligomer polyol such as polyethers, polyester and polyolefine, with polyisocyanates and glycol or Diamines chainextender progressively addition polymerization form; Its structure can describe by " soft section " and " hard section ", and the polyvalent alcohols such as polyethers, polyester or polyolefine form soft section, and vulcabond, chainextender form hard section.Due to the thermodynamics uncompatibility between soft section and hard section, soft section and hard section can form independently microcell by scatter-gather, have micro phase separation structure.Soft section of elasticity that PU material is provided, toughness and low-temperature performance; Hard section then provides hardness, the strength and modulus performance of PU material.It is a kind of resilient material between ordinary rubber and plastics, has both had the snappiness of rubber, has again the high strength of plastics, and its elongation is large, and durometer level is wide.Its wear resistance, biocompatibility and blood compatibility are outstanding especially; Meanwhile, its also has the performance such as excellent oil resistant, low temperature resistant, radiation hardness and heavy burden, heat insulation, insulation.Therefore, the Application Areas of PUE widely.
The PUE forming soft section by polyether glycol has unique corrosion-resistant, hydrolysis, warp resistance and good cementability, in speciality polymer material, have critical role; Not only containing carbonyl but also containing amino in its structure, can with many Electronic interactions, form hydrogen bond etc., therefore there is extremely excellent absorption bonding force, have snappiness, wear resistance and higher breaking tenacity concurrently, be thus widely used in the fields such as timber, electronic apparatus, automobile making.
Summary of the invention
The object of this invention is to provide a kind of polyether(poly)urethane elastomerics synthetic method of good mechanical properties.
The present invention is achieved by the following technical programs: a kind of polyether(poly)urethane elastomerics synthetic method, comprises polyethers dehydration, synthesis performed polymer and polyurethane elastomer and prepares three steps;
Described polyethers dehydrating step is added by polyoxyethylene glycol in there-necked flask, heats up and vacuumizes, interior temperature be 105 ~ l10 DEG C, dewater under vacuum tightness 133.3Pa condition 1.5h, is then cooled to less than 50 DEG C, airtightly in the container putting people's drying to save backup;
Described synthesis performed polymer step is, polyoxyethylene glycol and 4 are accurately added by formula ratio in the there-necked flask of drying, 4 '-diphenylmethanediisocyanate, 80 ~ 85 DEG C are warmed up to after stirring, every 15min sampling and measuring NCO massfraction, until be synthesis performed polymer terminal when measured value is substantially constant;
Described elastic polyurethane preparation step is, performed polymer is cooled to 60 DEG C, add melted 1,4-butyleneglycol mixes rapidly, treats that temperature rises to 80 DEG C, stops stirring, vacuumizing and defoaming 5min, in the Standard Module pouring preheating again into and polytetrafluoroethyldisk disk, at 110 DEG C, slaking 3 ~ 5h, obtains polyurethane elastomer.
The present invention has following beneficial effect:
The polyurethane elastomer of preparation, its Shao A hardness reaches 60, and elongation at break reaches 650%, and tensile strength reaches 30.1MPa, and tear strength reaches 60Knm
-1.
Embodiment
Below in conjunction with specific embodiment, the present invention will be further described.
Specific embodiment: preparation process of the present invention comprises polyethers dehydration, synthesis performed polymer and polyurethane elastomer and prepares three steps;
Described polyethers dehydrating step is added by polyoxyethylene glycol in there-necked flask, heats up and vacuumizes, interior temperature be 105 ~ l10 DEG C, dewater under vacuum tightness 133.3Pa condition 1.5h, is then cooled to less than 50 DEG C, airtightly in the container putting people's drying to save backup;
Described synthesis performed polymer step is, polyoxyethylene glycol and 4 are accurately added by formula ratio in the there-necked flask of drying, 4 '-diphenylmethanediisocyanate, 80 ~ 85 DEG C are warmed up to after stirring, every 15min sampling and measuring NCO massfraction, until be synthesis performed polymer terminal when measured value is substantially constant;
Described elastic polyurethane preparation step is, performed polymer is cooled to 60 DEG C, add melted 1,4-butyleneglycol mixes rapidly, treats that temperature rises to 80 DEG C, stops stirring, vacuumizing and defoaming 5min, in the Standard Module pouring preheating again into and polytetrafluoroethyldisk disk, at 110 DEG C, slaking 3 ~ 5h, obtains polyurethane elastomer.
Carry out mechanical analysis to it, its Shao A hardness reaches 60, and elongation at break reaches 650%, and tensile strength reaches 30.1MPa, and tear strength reaches 60Knm
-1.
Above content is the further description done the present invention in conjunction with concrete embodiment, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, some simple deduction or replace can also be made, all should be considered as belonging to protection scope of the present invention.
Claims (1)
1. a polyether(poly)urethane elastomerics synthetic method, is characterized in that: comprise polyethers dehydration, synthesis performed polymer and polyurethane elastomer and prepare three steps;
(1) described polyethers dehydrating step is added by polyoxyethylene glycol in there-necked flask, heats up and vacuumizes, interior temperature be 105 ~ l10 DEG C, dewater under vacuum tightness 133.3Pa condition 1.5h, is then cooled to less than 50 DEG C, airtightly in the container putting people's drying to save backup;
(2) described synthesis performed polymer step is, polyoxyethylene glycol and 4 are accurately added by formula ratio in the there-necked flask of drying, 4 '-diphenylmethanediisocyanate, 80 ~ 85 DEG C are warmed up to after stirring, every 15min sampling and measuring NCO massfraction, until be synthesis performed polymer terminal when measured value is substantially constant;
(3) described elastic polyurethane preparation step is, performed polymer is cooled to 60 DEG C, add melted 1,4-butyleneglycol mixes rapidly, treats that temperature rises to 80 DEG C, stops stirring, vacuumizing and defoaming 5min, in the Standard Module pouring preheating again into and polytetrafluoroethyldisk disk, at 110 DEG C, slaking 3 ~ 5h, obtains polyurethane elastomer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510761738.4A CN105566604A (en) | 2015-11-11 | 2015-11-11 | Synthesis method of polyether urethane elastomers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510761738.4A CN105566604A (en) | 2015-11-11 | 2015-11-11 | Synthesis method of polyether urethane elastomers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105566604A true CN105566604A (en) | 2016-05-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510761738.4A Pending CN105566604A (en) | 2015-11-11 | 2015-11-11 | Synthesis method of polyether urethane elastomers |
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| CN (1) | CN105566604A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112226014A (en) * | 2020-10-13 | 2021-01-15 | 安徽和佳医疗用品科技有限公司 | Soft high-elasticity PVC (polyvinyl chloride) glove and preparation method thereof |
-
2015
- 2015-11-11 CN CN201510761738.4A patent/CN105566604A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112226014A (en) * | 2020-10-13 | 2021-01-15 | 安徽和佳医疗用品科技有限公司 | Soft high-elasticity PVC (polyvinyl chloride) glove and preparation method thereof |
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| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160511 |
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| WD01 | Invention patent application deemed withdrawn after publication |