CN110746562A - Synthetic rubber and preparation method thereof - Google Patents
Synthetic rubber and preparation method thereof Download PDFInfo
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- CN110746562A CN110746562A CN201911095565.1A CN201911095565A CN110746562A CN 110746562 A CN110746562 A CN 110746562A CN 201911095565 A CN201911095565 A CN 201911095565A CN 110746562 A CN110746562 A CN 110746562A
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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
- C08G18/32—Polyhydroxy compounds; Polyamines; Hydroxyamines
- C08G18/3203—Polyhydroxy compounds
- C08G18/3206—Polyhydroxy compounds aliphatic
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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
- C08G18/16—Catalysts
- C08G18/166—Catalysts not provided for in the groups C08G18/18 - C08G18/26
- C08G18/168—Organic compounds
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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
- C08G18/16—Catalysts
- C08G18/18—Catalysts containing secondary or tertiary amines or salts thereof
- C08G18/20—Heterocyclic amines; Salts thereof
- C08G18/2045—Heterocyclic amines; Salts thereof containing condensed heterocyclic rings
- C08G18/2063—Heterocyclic amines; Salts thereof containing condensed heterocyclic rings having two nitrogen atoms in the condensed ring system
Abstract
The invention discloses a synthetic rubber, which comprises the following components in percentage by weight of 100: 75-80: 2, wherein the material A comprises the following raw materials in parts by weight: 85-95 parts of polyol, 3-15 parts of ethylene glycol and 0.1-1 part of silicone surfactant; the material B comprises the following raw materials in parts by weight: 45-60 parts of diphenylmethane diisocyanate; 40-55 parts of carbamate modified diphenylmethane diisocyanate; the material C comprises the following raw materials in parts by weight: 30-35 parts of triethylene diamine and 65-70 parts of ethylene glycol; the invention also provides a preparation method of the synthetic rubber; the synthetic rubber provided by the invention has the tensile strength of 16.1-18.4 MPa and the tear strength of 26-31 kN.m～1The tensile elongation reaches 359-385%.
Description
Technical Field
The invention relates to the technical field of inorganic materials, in particular to synthetic rubber and a preparation method thereof.
Background
Synthetic rubbers are high-elasticity polymers synthesized by man. Also known as synthetic elastomers, are one of three major synthetic materials, with yields only lower than synthetic resins (or plastics), synthetic fibers. The rubber is a necessary material for manufacturing airplanes, warships, automobiles, tractors, harvesters, water conservancy irrigation and drainage machines, medical instruments and the like. Depending on the origin, rubbers can be divided into natural and synthetic rubbers. The performance of a few varieties of synthetic rubber is similar to that of natural rubber, most of the synthetic rubber is different from that of the natural rubber, but both of the synthetic rubber and the natural rubber are high-elasticity high-molecular materials, and the synthetic rubber generally needs to be vulcanized and processed to have practicability and use value. Synthetic rubbers were produced at the beginning of the 20 th century and developed rapidly from the 40 s. The synthetic rubber is generally not comprehensive in performance as natural rubber, but has the performances of high elasticity, insulativity, air tightness, oil resistance, high temperature resistance or low temperature resistance and the like, so that the synthetic rubber is widely applied to industry and agriculture, national defense, traffic and daily life. The tensile property of the existing synthetic rubber needs to be improved.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a synthetic rubber and a preparation method thereof, and the synthetic rubber has good tensile property.
The invention is realized by the following steps:
one purpose of the invention is to provide synthetic rubber which comprises a material A, a material B and a material C, wherein the weight ratio of the material A to the material B to the material C is 100: 75-80: 2; wherein the content of the first and second substances,
the material A comprises the following raw materials in parts by weight: 85-95 parts of polyol, 3-15 parts of ethylene glycol and 0.1-1 part of silicone surfactant;
the material B comprises the following raw materials in parts by weight: 45-60 parts of diphenylmethane diisocyanate; 40-55 parts of carbamate modified diphenylmethane diisocyanate;
the material C comprises the following raw materials in parts by weight: 30-35 parts of triethylene diamine and 65-70 parts of ethylene glycol.
The invention also aims to provide a preparation method of the synthetic rubber, which comprises the following steps:
step 1, preparation of material A: stirring and uniformly mixing 85-95 parts of polyol, 3-15 parts of ethylene glycol and 0.1-1 part of organic silicon surfactant at the temperature of 55-65 ℃ to obtain a material A;
step 2, preparation of material B: 45-60 parts of diphenylmethane diisocyanate; stirring and uniformly mixing 40-55 parts of carbamate modified diphenylmethane diisocyanate at the temperature of 55-65 ℃ to obtain a material B;
step 3, preparation of materials C: stirring and uniformly mixing 30-35 parts of triethylene diamine and 65-70 parts of ethylene glycol to obtain a material C;
step 4, mixing the material A, the material B and the material C in a weight ratio of 100: 75-80: 2, injecting the mixture into a stirrer for stirring to obtain a mixed material;
and step 5, injecting the mixed material into a mold for plasticizing at the temperature of 50-60 ℃.
Compared with the prior art, the invention has the following advantages and effects:
according to the synthetic rubber provided by the invention, the material C is used as a catalyst, the material A and the material B are crosslinked to form a polymer under the catalysis of the material C, and due to the fact that the crosslinking density and the interaction among rubber molecules are increased, the tensile strength is finally greatly improved and reaches 16.1-18.4 MPa, and the tear strength reaches 26-31 kN.m-1The tensile elongation reaches 359-385%.
Detailed Description
Example 1
1. The synthetic rubber comprises a material A, a material B and a material C, wherein the weight ratio of the material A to the material B to the material C is 100: 78: 2; wherein the content of the first and second substances,
the material A comprises the following raw materials in parts by weight: 90 parts of polyol, 10 parts of ethylene glycol and 0.5 part of organosilicon surfactant;
the material B comprises the following raw materials in parts by weight: 52 parts of diphenylmethane diisocyanate; 48 parts of carbamate modified diphenylmethane diisocyanate;
the material C comprises the following raw materials in parts by weight: 33 parts of triethylene diamine and 67 parts of ethylene glycol.
2. The preparation method comprises the following steps:
step 1, preparation of material A: stirring and uniformly mixing 90 parts of polyol, 10 parts of ethylene glycol and 0.5 part of organic silicon surfactant at the temperature of 55-65 ℃ to obtain a material A;
step 2, preparation of material B: stirring and uniformly mixing 52 parts of diphenylmethane diisocyanate and 48 parts of carbamate modified diphenylmethane diisocyanate at the temperature of 55-65 ℃ to obtain a material B;
step 3, preparation of materials C: stirring and uniformly mixing 33 parts of triethylene diamine and 67 parts of ethylene glycol to obtain a material C;
step 4, mixing the material A, the material B and the material C in a weight ratio of 100: 75-80: 2, stirring in a stirrer at a stirring speed of 8000-10000 rpm to obtain a mixed material;
and 5, injecting the mixed material into a mold for plasticizing at the temperature of 50-60 ℃, wherein the plasticizing time is 3-5 min, and the weight ratio of the water addition amount to the mixed material in the plasticizing process is 1000: 1.2.
example 2
1. The synthetic rubber comprises a material A, a material B and a material C, wherein the weight ratio of the material A to the material B to the material C is 100: 75: 2; wherein the content of the first and second substances,
the material A comprises the following raw materials in parts by weight: 85 parts of polyol, 15 parts of ethylene glycol and 0.1 part of silicone surfactant;
the material B comprises the following raw materials in parts by weight: 60 parts of diphenylmethane diisocyanate and 40 parts of carbamate modified diphenylmethane diisocyanate;
the material C comprises the following raw materials in parts by weight: 30 parts of triethylene diamine and 70 parts of ethylene glycol.
2. The preparation method comprises the following steps:
step 1, preparation of material A: 85 parts of polyol, 15 parts of ethylene glycol and 0.1 part of silicone surfactant are stirred and uniformly mixed at the temperature of 55-65 ℃ to obtain a material A;
step 2, preparation of material B: stirring and uniformly mixing 60 parts of diphenylmethane diisocyanate and 40 parts of carbamate modified diphenylmethane diisocyanate at the temperature of 55-65 ℃ to obtain a material B;
step 3, preparation of materials C: stirring and uniformly mixing 30 parts of triethylene diamine and 70 parts of ethylene glycol to obtain a material C;
step 4, mixing the material A, the material B and the material C in a weight ratio of 100: 75: 2, stirring in a stirrer at a stirring speed of 8000-10000 rpm to obtain a mixed material;
and 5, injecting the mixed material into a mold for plasticizing at the temperature of 50-60 ℃, wherein the plasticizing time is 3-5 min, and the weight ratio of the water addition amount to the mixed material in the plasticizing process is 1000: 1.
example 3
1. The synthetic rubber comprises a material A, a material B and a material C, wherein the weight ratio of the material A to the material B to the material C is 100: 80: 2; wherein the content of the first and second substances,
the material A comprises the following raw materials in parts by weight: 95 parts of polyol, 3 parts of ethylene glycol and 1 part of silicone surfactant;
the material B comprises the following raw materials in parts by weight: 45 parts of diphenylmethane diisocyanate and 55 parts of carbamate modified diphenylmethane diisocyanate;
the material C comprises the following raw materials in parts by weight: 35 parts of triethylene diamine and 65 parts of ethylene glycol.
2. The preparation method comprises the following steps:
step 1, preparation of material A: stirring and uniformly mixing 95 parts of polyol, 3 parts of ethylene glycol and 1 part of organic silicon surfactant at the temperature of 55-65 ℃ to obtain a material A;
step 2, preparation of material B: stirring and uniformly mixing 45 parts of diphenylmethane diisocyanate and 55 parts of carbamate modified diphenylmethane diisocyanate at the temperature of 55-65 ℃ to obtain a material B;
step 3, preparation of materials C: stirring and uniformly mixing 35 parts of triethylene diamine and 65 parts of ethylene glycol to obtain a material C;
step 4, mixing the material A, the material B and the material C in a weight ratio of 100: 80: 2, stirring in a stirrer at a stirring speed of 8000-10000 rpm to obtain a mixed material;
and 5, injecting the mixed material into a mold for plasticizing at the temperature of 50-60 ℃, wherein the plasticizing time is 3-5 min, and the weight ratio of the water addition amount to the mixed material in the plasticizing process is 1000: 1.5.
experimental example 1
The tensile properties and tear strengths of the synthetic rubbers prepared in examples 1 to 3 were counted, and the results are shown in Table 1. Tensile properties (including tensile strength, elongation at break, etc.) and tear strength: measured according to GB/T528-1992 and GB/T529-1991, respectively (tensile rate 500 mm/min).
TABLE 1
| Inspection item | Unit of | Example 1 | Example 2 | Example 3 |
| Shore A hardness | Degree of rotation | 66 | 67 | 68 |
| Tensile strength | MPa | 18.4 | 16.1 | 17.5 |
| Tear strength | kN.m-1 | 31 | 26 | 29 |
| Tensile elongation | ％ | 385 | 371 | 359 |
As can be seen from Table 1, the synthetic rubbers provided in examples 1 to 3 of the present invention have a tensile strength of 16.1 to 18.4MPa and a tear strength of 26～31kN.m-1The tensile elongation reaches 359-385%. Of these, example 1 is the most preferred example.
The invention is not to be considered as limited to the particular embodiments shown, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. The synthetic rubber is characterized by comprising a material A, a material B and a material C, wherein the weight ratio of the material A to the material B to the material C is 100: 75-80: 2; wherein the content of the first and second substances,
the material A comprises the following raw materials in parts by weight: 85-95 parts of polyol, 3-15 parts of ethylene glycol and 0.1-1 part of silicone surfactant;
the material B comprises the following raw materials in parts by weight: 45-60 parts of diphenylmethane diisocyanate and 40-55 parts of carbamate modified diphenylmethane diisocyanate;
the material C comprises the following raw materials in parts by weight: 30-35 parts of triethylene diamine and 65-70 parts of ethylene glycol.
2. The synthetic rubber according to claim 1, wherein the material A comprises the following raw materials in parts by weight: 90 parts of polyol, 10 parts of ethylene glycol and 0.5 part of silicone surfactant.
3. The synthetic rubber according to claim 1, wherein the material B comprises the following raw materials in parts by weight: 52 parts of diphenylmethane diisocyanate; 48 parts of urethane modified diphenylmethane diisocyanate.
4. The synthetic rubber according to claim 1, wherein the material C comprises the following raw materials in parts by weight: 33 parts of triethylene diamine and 67 parts of ethylene glycol.
5. A process for preparing the synthetic rubber of any of claims 1 to 4, comprising:
step 1, preparation of material A: stirring and uniformly mixing 85-95 parts of polyol, 3-15 parts of ethylene glycol and 0.1-1 part of organic silicon surfactant at the temperature of 55-65 ℃ to obtain a material A;
step 2, preparation of material B: stirring and uniformly mixing 45-60 parts of diphenylmethane diisocyanate and 40-55 parts of carbamate modified diphenylmethane diisocyanate at the temperature of 55-65 ℃ to obtain a material B;
step 3, preparation of materials C: stirring and uniformly mixing 30-35 parts of triethylene diamine and 65-70 parts of ethylene glycol to obtain a material C;
step 4, mixing the material A, the material B and the material C in a weight ratio of 100: 75-80: 2, injecting the mixture into a stirrer for stirring to obtain a mixed material;
and step 5, injecting the mixed material into a mold for plasticizing at the temperature of 50-60 ℃.
6. The method for producing a synthetic rubber according to claim 5, wherein the stirring speed in the step 4 is 8000 to 10000 rpm.
7. The method for preparing synthetic rubber according to claim 5, wherein the plasticizing time in the step 5 is 3-5 min, and the weight ratio of the water addition amount to the mixed material in the plasticizing process is 1000: 1 to 1.5.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911095565.1A CN110746562A (en) | 2019-11-11 | 2019-11-11 | Synthetic rubber and preparation method thereof |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105693970A (en) * | 2016-01-29 | 2016-06-22 | 大连固瑞聚氨酯股份有限公司 | Polyether-type microporous hard polyurethane shoe sole combination raw solution and polyurethane shoe sole |
| CN106632959A (en) * | 2016-10-15 | 2017-05-10 | 广东雅得实业有限公司 | Production method of environment-friendly modified polyurethane (PU) sole |
| CN106832203A (en) * | 2016-12-30 | 2017-06-13 | 浙江华峰新材料股份有限公司 | Tire polyurethane resin and preparation method |
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- 2019-11-11 CN CN201911095565.1A patent/CN110746562A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105693970A (en) * | 2016-01-29 | 2016-06-22 | 大连固瑞聚氨酯股份有限公司 | Polyether-type microporous hard polyurethane shoe sole combination raw solution and polyurethane shoe sole |
| CN106632959A (en) * | 2016-10-15 | 2017-05-10 | 广东雅得实业有限公司 | Production method of environment-friendly modified polyurethane (PU) sole |
| CN106832203A (en) * | 2016-12-30 | 2017-06-13 | 浙江华峰新材料股份有限公司 | Tire polyurethane resin and preparation method |
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