CN115612052A - Polyurethane composite material with high weather resistance and preparation method thereof - Google Patents
Polyurethane composite material with high weather resistance and preparation method thereof Download PDFInfo
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- CN115612052A CN115612052A CN202110786306.4A CN202110786306A CN115612052A CN 115612052 A CN115612052 A CN 115612052A CN 202110786306 A CN202110786306 A CN 202110786306A CN 115612052 A CN115612052 A CN 115612052A
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- 229920002635 polyurethane Polymers 0.000 title claims abstract description 23
- 239000004814 polyurethane Substances 0.000 title claims abstract description 23
- 239000002131 composite material Substances 0.000 title claims abstract description 18
- 238000002360 preparation method Methods 0.000 title abstract description 12
- -1 2-ethylphenyl Chemical group 0.000 claims abstract description 33
- 239000004970 Chain extender Substances 0.000 claims abstract description 15
- 229920005906 polyester polyol Polymers 0.000 claims abstract description 15
- UKLDJPRMSDWDSL-UHFFFAOYSA-L [dibutyl(dodecanoyloxy)stannyl] dodecanoate Chemical compound CCCCCCCCCCCC(=O)O[Sn](CCCC)(CCCC)OC(=O)CCCCCCCCCCC UKLDJPRMSDWDSL-UHFFFAOYSA-L 0.000 claims abstract description 12
- 239000012975 dibutyltin dilaurate Substances 0.000 claims abstract description 12
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 5
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 5
- 238000002347 injection Methods 0.000 claims description 43
- 239000007924 injection Substances 0.000 claims description 43
- 239000000203 mixture Substances 0.000 claims description 24
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 12
- CFXCGWWYIDZIMU-UHFFFAOYSA-N Octyl-3,5-di-tert-butyl-4-hydroxy-hydrocinnamate Chemical group CCCCCCCCOC(=O)CCC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 CFXCGWWYIDZIMU-UHFFFAOYSA-N 0.000 claims description 12
- WERYXYBDKMZEQL-UHFFFAOYSA-N butane-1,4-diol Chemical compound OCCCCO WERYXYBDKMZEQL-UHFFFAOYSA-N 0.000 claims description 8
- BBITXNWQALLODC-UHFFFAOYSA-N 2-[4-(4-oxo-3,1-benzoxazin-2-yl)phenyl]-3,1-benzoxazin-4-one Chemical compound C1=CC=C2C(=O)OC(C3=CC=C(C=C3)C=3OC(C4=CC=CC=C4N=3)=O)=NC2=C1 BBITXNWQALLODC-UHFFFAOYSA-N 0.000 claims description 7
- 239000002202 Polyethylene glycol Substances 0.000 claims description 7
- WNLRTRBMVRJNCN-UHFFFAOYSA-L adipate(2-) Chemical compound [O-]C(=O)CCCCC([O-])=O WNLRTRBMVRJNCN-UHFFFAOYSA-L 0.000 claims description 7
- 229920001223 polyethylene glycol Polymers 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 5
- 239000002253 acid Substances 0.000 claims description 3
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 7
- 229920003225 polyurethane elastomer Polymers 0.000 abstract description 7
- 125000001140 1,4-phenylene group Chemical group [H]C1=C([H])C([*:2])=C([H])C([H])=C1[*:1] 0.000 abstract description 3
- 238000007789 sealing Methods 0.000 abstract description 3
- 239000000047 product Substances 0.000 description 13
- 230000000052 comparative effect Effects 0.000 description 10
- 238000012360 testing method Methods 0.000 description 7
- 239000004433 Thermoplastic polyurethane Substances 0.000 description 6
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 6
- 229920001971 elastomer Polymers 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 230000032683 aging Effects 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- 238000004132 cross linking Methods 0.000 description 2
- 239000000806 elastomer Substances 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- NLZUEZXRPGMBCV-UHFFFAOYSA-N Butylhydroxytoluene Chemical group CC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 NLZUEZXRPGMBCV-UHFFFAOYSA-N 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000000071 blow moulding Methods 0.000 description 1
- 238000003490 calendering Methods 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 125000005442 diisocyanate group Chemical group 0.000 description 1
- 150000002009 diols Chemical group 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000012948 isocyanate Substances 0.000 description 1
- 150000002513 isocyanates Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 229920005862 polyol Polymers 0.000 description 1
- 150000003077 polyols Chemical class 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 229920002725 thermoplastic elastomer Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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
- C08G18/6633—Compounds of group C08G18/42
- C08G18/6637—Compounds of group C08G18/42 with compounds of group C08G18/32 or polyamines of C08G18/38
- C08G18/664—Compounds of group C08G18/42 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/3203
-
- 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
-
- 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
- C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
- C08G18/4236—Polycondensates having carboxylic or carbonic ester groups in the main chain containing only aliphatic groups
- C08G18/4238—Polycondensates having carboxylic or carbonic ester groups in the main chain containing only aliphatic groups derived from dicarboxylic acids and dialcohols
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/16—Nitrogen-containing compounds
- C08K5/20—Carboxylic acid amides
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/16—Nitrogen-containing compounds
- C08K5/34—Heterocyclic compounds having nitrogen in the ring
- C08K5/35—Heterocyclic compounds having nitrogen in the ring having also oxygen in the ring
- C08K5/357—Six-membered rings
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L75/00—Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
- C08L75/04—Polyurethanes
- C08L75/06—Polyurethanes from polyesters
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2375/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
- C08J2375/04—Polyurethanes
- C08J2375/06—Polyurethanes from polyesters
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/20—Applications use in electrical or conductive gadgets
- C08L2203/202—Applications use in electrical or conductive gadgets use in electrical wires or wirecoating
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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)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Polyurethanes Or Polyureas (AREA)
Abstract
The invention discloses a polyurethane composite material with high weather resistance and a preparation method thereof, wherein the polyurethane composite material is prepared from the following components in parts by weight: 90-110 parts of polyester polyol, 30-35 parts of chain extender, 50-70 parts of MDI, 0.1-1 part of antioxidant, 0.1-1 part of dibutyltin dilaurate, 0.5-2 parts of 2,2'- (1, 4-phenylene) bis-4H-3, 1-benzoxazine-4-ketone and 0.5-2 parts of N- (2-ethylphenyl) -N' - (2-ethoxy-5-tert-butylphenyl) oxalyl diamine. The polyurethane elastomer has simple preparation process and short forming time. The prepared polyurethane composite material has excellent weather resistance and mechanical property, and can be widely applied to the fields of wires and cables, automobile sealing strips, shoe materials, films and the like.
Description
Technical Field
The invention belongs to the field of composite materials, and particularly relates to a polyurethane composite material with high weather resistance and a preparation method thereof.
Background
The thermoplastic polyurethane elastomer is also called thermoplastic polyurethane rubber, TPU for short, and is An (AB) n type block linear polymer, A is polyester or polyether with high molecular weight (1000-6000), B is diol containing 2-12 straight chain carbon atoms, and the chemical structure between AB chain segments is diisocyanate. The thermoplastic polyurethane rubber is crosslinked by intermolecular hydrogen bonds or slightly crosslinked between macromolecular chains, and the two crosslinking structures have reversibility along with the increase or decrease of temperature. The intermolecular force is weakened in a molten state or a solution state, and the intermolecular force is strongly connected together after cooling or solvent volatilization, so that the performance of the original solid is recovered.
Thermoplastic polyurethane elastomers have become one of the important thermoplastic elastomer materials with excellent properties and wide application, and the molecules thereof are basically linear and have no or few chemical cross-links. The linear polyurethane has physical crosslinking formed by a plurality of hydrogen bonds among molecular chains, and the hydrogen bonds have a strengthening effect on the form of the linear polyurethane, so that a plurality of excellent performances such as high modulus, high strength, excellent wear resistance, chemical resistance, hydrolysis resistance, high low temperature resistance and high mold resistance are endowed. These good properties have led to thermoplastic polyurethanes being widely used in many areas such as apparel, automotive interiors, medical hygiene, tubing and sheeting. The final product does not need to be vulcanized and crosslinked generally, so that the reaction period can be shortened, and the energy consumption can be reduced. Because it is a substantially linear polymer, it can be processed using the same techniques and equipment as thermoplastics, such as injection molding, extrusion, blow molding, calendering, etc., and is particularly suitable for mass production of medium and small size parts. The waste material can be recycled and reused, and different additives or fillers can be used in the production or processing process to improve certain physical properties and reduce the cost.
However, the polyurethane elastomer has poor weather resistance, and the polyurethane elastomer is required to have high weather resistance in the fields of wires and cables, automobile sealing strips, shoe materials, films and the like, and the application of the polyurethane elastomer in the fields is limited to a certain extent.
Disclosure of Invention
The invention aims to provide a polyurethane composite material with high weather resistance and a preparation method thereof, and aims to solve the problems in the prior art.
The purpose of the invention is realized by the following technical scheme:
a polyurethane composite material with high weather resistance is prepared from the following components in parts by weight:
as a preferred technical scheme, the polyester polyol is polyethylene glycol adipate; the molecular weight of the polyethylene glycol adipate is 1000-2500, the hydroxyl value is 60 +/-10 mgKOH/g, the acid value is less than 2.0mgKOH/g, and the viscosity at 25 ℃ is 7000 +/-1000cpa.s; the chain extender is prepared from 1, 4-butanediol and ethylene glycol in a weight ratio of 1: 1; the antioxidant is antioxidant 1135.
The invention also provides a preparation method of the polyurethane composite material with high weather resistance, which comprises the following steps: uniformly mixing 90-110 parts of dehydrated polyester polyol, 30-35 parts of dehydrated chain extender, 50-70 parts of MDI, 0.1-1 part of dibutyltin dilaurate, 0.1-1 part of antioxidant, 0.5-2 parts of 2,2'- (1, 4-phenylene) bis-4H-3, 1-benzoxazine-4-one and 0.5-2 parts of N- (2-ethylphenyl) -N' - (2-ethoxy-5-tert-butylphenyl) oxalyl diamine to obtain a mixture, and injecting the mixture into a mold by using an injection machine for curing to obtain a target product. Further, the injection temperature of the injection machine is 40-45 ℃, and the injection pressure is 20-30Mpa; the curing temperature is 90-110 ℃ and the curing time is 5-20 minutes.
Compared with the prior art, the invention has the beneficial effects that:
the light stability of the polyurethane depends on two components of isocyanate and polyol to a great extent, and the invention selects polyethylene glycol adipate and MDI as raw materials to ensure that the polyurethane formed by polymerization has certain weather resistance.
Furthermore, 2'- (1, 4-phenylene) bis-4H-3, 1-benzoxazine-4-one and N- (2-ethylphenyl) -N' - (2-ethoxy-5-tert-butylphenyl) oxalyl diamine are added to serve as a compound weather-resistant agent, so that the absorption of ultraviolet rays by polyurethane can be reduced, and the oxidation reaction of a polyurethane macromolecular chain can be prevented, so that the weather resistance of the polyurethane elastomer is greatly improved, and a relatively excellent mechanical property can be maintained.
The polyurethane elastomer disclosed by the invention is simple in preparation process and short in forming time, and can be widely applied to the fields of wires and cables, automobile sealing strips, shoe materials, films and the like.
Detailed Description
The invention will now be further described with reference to the following examples, which are intended to be illustrative of the invention and are not to be construed as limiting thereof.
All materials of examples and comparative examples are commercially available.
Wherein the chain extender is 1, 4-butanediol and ethylene glycol according to the weight ratio of 1: 1; the polyester polyol is polyethylene glycol adipate with molecular weight of 2000, the hydroxyl value is 60 +/-10 mgKOH/g, the acid value is less than 2.0mgKOH/g, and the viscosity is 7000 +/-1000cpa.s 25 ℃; the manufacturers of 1, 4-butanediol, ethylene glycol, polyethylene glycol adipate are Hubeixin Rundd chemical. MDI is german bayer 44V20. The antioxidant 1135 was manufactured by Condst chemical engineering. The manufacturers of 2,2' - (1, 4-phenylene) bis-4H-3, 1-benzoxazin-4-one are all US cyanohydrins; n- (2-ethylphenyl) -N' - (2-ethoxy-5-tert-butylphenyl) oxalyl diamine was manufactured by clainn.
The property test of the materials prepared in each example and comparative example was performed under the following conditions:
and (3) testing tensile strength: the test piece is processed according to ISO 527-2 standard, the size of the test piece is 170 x 10 x 4mm, and the drawing speed is 50mm/min;
and (3) weather resistance test, namely, carrying out ultraviolet accelerated aging on the tensile sample bar (the ultraviolet aging conditions are shown in table 1) to test the tensile property of the tensile sample bar.
TABLE 1 ultraviolet aging conditions
Example 1
The preparation method comprises the steps of adding a uniformly mixed mixture of 90 parts of dehydrated polyester polyol, 30 parts of dehydrated chain extender, 50 parts of MDI, 0.1 part of dibutyltin dilaurate, 0.1 part of antioxidant 1135, 0.5 part of 2,2'- (1, 4-phenylene) bis-4H-3, 1-benzoxazine-4-one and 0.5 part of N- (2-ethylphenyl) -N' - (2-ethoxy-5-tert-butylphenyl) oxalyl diamine into an injection machine, injecting the mixture into a mold by using the injection machine, wherein the injection pressure is 20MPA, the injection temperature is 40 ℃, the mold temperature is 90 ℃, and demolding is carried out after 20 minutes to prepare a finished product.
Example 2
The preparation method comprises the following steps of adding a mixture of 110 parts of dehydrated polyester polyol, 35 parts of dehydrated chain extender, 70 parts of MDI, 1 part of dibutyltin dilaurate, 1 part of antioxidant 1135, 2 parts of 2,2'- (1, 4-phenylene) bis-4H-3, 1-benzoxazine-4-one and 2 parts of N- (2-ethylphenyl) -N' - (2-ethoxy-5-tert-butylphenyl) oxalyl diamine which are uniformly mixed into an injection machine, injecting the mixture into a mold by using the injection machine, wherein the injection pressure is 30MPA, the injection temperature is 45 ℃, the mold temperature is 110 ℃, and demolding is carried out after 5 minutes to prepare the finished product.
Example 3
The preparation method comprises the following steps of adding a uniformly mixed mixture of 100 parts of dehydrated polyester polyol, 30 parts of dehydrated chain extender, 60 parts of MDI, 0.5 part of dibutyltin dilaurate, 0.5 part of antioxidant 1135, 1 part of 2,2'- (1, 4-phenylene) bis-4H-3, 1-benzoxazine-4-one and 1 part of N- (2-ethylphenyl) -N' - (2-ethoxy-5-tert-butylphenyl) oxalyl diamine into an injection machine, injecting the mixture into a mold by using the injection machine at an injection pressure of 25MPA and an injection temperature of 42 ℃ and a mold temperature of 100 ℃, demolding the mixture after 10 minutes, and preparing a finished product.
Example 4
The preparation method comprises the following steps of adding a uniformly mixed mixture of 90 parts of dehydrated polyester polyol, 32 parts of dehydrated chain extender, 65 parts of MDI, 0.5 part of dibutyltin dilaurate, 0.5 part of antioxidant 1135, 2 parts of 2,2'- (1, 4-phenylene) bis-4H-3, 1-benzoxazine-4-one and 2 parts of N- (2-ethylphenyl) -N' - (2-ethoxy-5-tert-butylphenyl) oxalyl diamine into an injection machine, injecting the mixture into a mold by using the injection machine, wherein the injection pressure is 25MPA, the injection temperature is 45 ℃, the mold temperature is 110 ℃, and demolding is carried out after 8 minutes to prepare the finished product.
Comparative example 1
And adding a mixture of 90 parts of dehydrated polyester polyol, 32 parts of dehydrated chain extender, 65 parts of MDI, 0.5 part of dibutyltin dilaurate, 0.5 part of antioxidant 1135, 4 parts of 2,2' - (1, 4-phenylene) bis-4H-3, 1-benzoxazine-4-ketone, which are uniformly mixed, into an injection machine, injecting the mixture into a mold by using the injection machine, wherein the injection pressure is 25MPA, the injection temperature is 45 ℃, the mold temperature is 110 ℃, and demolding is carried out after 8 minutes to prepare the finished product.
Comparative example 2
And adding a uniformly mixed mixture of 90 parts of dehydrated polyester polyol, 32 parts of dehydrated chain extender, 65 parts of MDI, 0.5 part of dibutyltin dilaurate, 0.5 part of antioxidant 1135 and 4 parts of N- (2-ethylphenyl) -N' - (2-ethoxy-5-tert-butylphenyl) oxalyl diamine into an injection machine, injecting the mixture into a mold by using the injection machine, wherein the injection pressure is 25MPA, the injection temperature is 45 ℃, the mold temperature is 110 ℃, and demolding is carried out after 8 minutes to prepare the finished product.
Comparative example 3
Adding a uniformly mixed mixture of 90 parts of dehydrated polyester polyol, 32 parts of dehydrated chain extender, 65 parts of MDI, 0.5 part of dibutyltin dilaurate, 0.5 part of antioxidant 1135, 2 parts of 2,2' - (1, 4-phenylene) bis-4H-3, 1-benzoxazine-4-ketone and 2 parts of UV-328 into an injection machine, injecting the mixture into a mold by using the injection machine at an injection pressure of 25MPA at a temperature of 45 ℃ and a mold temperature of 110 ℃ for 8 minutes, and then demolding to prepare a finished product.
Comparative example 4
And adding a mixture of 90 parts of dehydrated polyester polyol, 32 parts of dehydrated chain extender, 65 parts of MDI, 0.5 part of dibutyltin dilaurate, 0.5 part of antioxidant 1135, 2 parts of UV-9 and 2 parts of N- (2-ethylphenyl) -N' - (2-ethoxy-5-tert-butylphenyl) oxalyl diamine into an injection machine, injecting the mixture into a mold by using the injection machine, wherein the injection pressure is 25MPA, the injection temperature is 45 ℃, the mold temperature is 110 ℃, and demolding is carried out after 8 minutes to prepare the finished product.
Comparative example 5
And (2) adding a mixture of 90 parts of dehydrated polyester polyol, 32 parts of dehydrated chain extender, 65 parts of MDI, 0.5 part of dibutyltin dilaurate, 0.5 part of antioxidant 1135, 2 parts of UV-9 and 2 parts of UV-328, uniformly mixing, into an injection machine, injecting into a mold by using the injection machine, wherein the injection pressure is 25MPA, the injection temperature is 45 ℃, the mold temperature is 110 ℃, and demolding is carried out after 8 minutes to prepare the finished product.
The physical properties of the products obtained in each example and comparative example were measured, and the properties are shown in table 2:
TABLE 2 test results of properties of materials prepared in each of examples and comparative examples
From the results of the above examples, it can be seen that the performance of the products prepared in the examples is significantly better than that of the products prepared in the comparative examples, which shows that the weather resistance of the polyurethane elastomer can be greatly increased by the scheme in the application, and at the same time, a better mechanical property can be maintained.
These examples are only for illustrating the present invention and should not limit the scope of the present invention. Further, after reading the disclosure of the present invention, one skilled in the art may make various changes or modifications to the equivalent form of the present invention, which also falls within the scope of the claims of the present application.
Claims (8)
1. A polyurethane composite material with high weather resistance is characterized in that: the composition is prepared from the following components in parts by weight:
2. the polyurethane composite with high weatherability as claimed in claim 1, characterized in that: the polyester polyol is polyethylene glycol adipate.
3. The polyurethane composite with high weatherability as claimed in claim 2, characterized in that: the molecular weight of the polyethylene glycol adipate is 1000-2500, the hydroxyl value is 60 +/-10 mgKOH/g, the acid value is less than 2.0mgKOH/g, and the viscosity is 7000 +/-1000cpa. S at 25 ℃.
4. The polyurethane composite with high weatherability as claimed in claim 1, characterized in that: the chain extender is prepared from 1, 4-butanediol and ethylene glycol in a weight ratio of 1:1, in a mixture of the components.
5. The polyurethane composite with high weatherability as claimed in claim 1, characterized in that: the antioxidant is antioxidant 1135.
6. The process for preparing a polyurethane composite having high weather resistance as claimed in any one of claims 1 to 5, wherein: the method comprises the following steps: uniformly mixing 90-110 parts of dehydrated polyester polyol, 30-35 parts of dehydrated chain extender, 50-70 parts of MDI, 0.1-1 part of dibutyltin dilaurate, 0.1-1 part of antioxidant, 0.5-2 parts of 2,2'- (1, 4-phenylene) bis-4H-3, 1-benzoxazine-4-one and 0.5-2 parts of N- (2-ethylphenyl) -N' - (2-ethoxy-5-tert-butylphenyl) oxalyl diamine to obtain a mixture, and injecting the mixture into a mold by using an injection machine for curing to obtain the target product.
7. The method for preparing a polyurethane composite material with high weather resistance according to claim 6, wherein: the injection temperature of the injection machine is 40-45 ℃, and the injection pressure is 20-30Mpa.
8. The method for preparing polyurethane composite with high weather resistance as claimed in claim 6, wherein: the curing temperature is 90-110 ℃ and the curing time is 5-20 minutes.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040209020A1 (en) * | 2003-04-15 | 2004-10-21 | 3M Innovative Properties Company | Light-stable structures |
| TW200422339A (en) * | 2002-10-02 | 2004-11-01 | Ciba Sc Holding Ag | Synergistic UV absorber combination |
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW200422339A (en) * | 2002-10-02 | 2004-11-01 | Ciba Sc Holding Ag | Synergistic UV absorber combination |
| CN1685008A (en) * | 2002-10-02 | 2005-10-19 | 西巴特殊化学品控股有限公司 | Synergistic UV absorber combination |
| JP2010270336A (en) * | 2002-10-02 | 2010-12-02 | Ciba Holding Inc | Synergistic uv absorber combination |
| US20040209020A1 (en) * | 2003-04-15 | 2004-10-21 | 3M Innovative Properties Company | Light-stable structures |
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