CN108166261A - A kind of environment-friendly watertight washes waterproofing agent and preparation method thereof - Google Patents

A kind of environment-friendly watertight washes waterproofing agent and preparation method thereof Download PDF

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Publication number
CN108166261A
CN108166261A CN201810083735.3A CN201810083735A CN108166261A CN 108166261 A CN108166261 A CN 108166261A CN 201810083735 A CN201810083735 A CN 201810083735A CN 108166261 A CN108166261 A CN 108166261A
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hyper
branched polyester
waterproofing agent
preparation
ldi
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徐美君
仲林伟
查鹏程
赵海花
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Jiangsu Nigeria Meida Technology Co Ltd
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Jiangsu Nigeria Meida Technology Co Ltd
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    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06MTREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/19Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
    • D06M15/37Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D06M15/564Polyureas, polyurethanes or other polymers having ureide or urethane links; Precondensation products forming them
    • D06M15/572Reaction products of isocyanates with polyesters or polyesteramides
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00Polymeric products of isocyanates or isothiocyanates
    • C08G18/06Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/40High-molecular-weight compounds
    • C08G18/42Polycondensates having carboxylic or carbonic ester groups in the main chain
    • C08G18/4266Polycondensates having carboxylic or carbonic ester groups in the main chain prepared from hydroxycarboxylic acids and/or lactones
    • C08G18/4286Polycondensates having carboxylic or carbonic ester groups in the main chain prepared from hydroxycarboxylic acids and/or lactones prepared from a combination of hydroxycarboxylic acids and/or lactones with polycarboxylic acids or ester forming derivatives thereof and polyhydroxy compounds
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00Polymeric products of isocyanates or isothiocyanates
    • C08G18/06Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/67Unsaturated compounds having active hydrogen
    • C08G18/671Unsaturated compounds having only one group containing active hydrogen
    • C08G18/672Esters of acrylic or alkyl acrylic acid having only one group containing active hydrogen
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00Polymeric products of isocyanates or isothiocyanates
    • C08G18/06Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/70Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
    • C08G18/72Polyisocyanates or polyisothiocyanates
    • C08G18/77Polyisocyanates or polyisothiocyanates having heteroatoms in addition to the isocyanate or isothiocyanate nitrogen and oxygen or sulfur
    • C08G18/771Polyisocyanates or polyisothiocyanates having heteroatoms in addition to the isocyanate or isothiocyanate nitrogen and oxygen or sulfur oxygen
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06MTREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/01Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with natural macromolecular compounds or derivatives thereof
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06MTREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M2200/00Functionality of the treatment composition and/or properties imparted to the textile material
    • D06M2200/10Repellency against liquids
    • D06M2200/12Hydrophobic properties

Abstract

The present invention provides a kind of environment-friendly watertights to wash waterproofing agent and preparation method thereof, it is characterised in that the waterproofing agent includes a kind of hyper-branched polyester modifier, and molecular formula is:

Description

A kind of environment-friendly watertight washes waterproofing agent and preparation method thereof
Technical field
The invention belongs to textile auxiliary's final finishing fields, and in particular to a kind of environment-friendly watertight washes waterproofing agent and its system Preparation Method.
Background technology
The key subjects of in the 21st century, facing mankind environmental protection.All environmentally harmful products all can be slowly substituted. At present, the leading products of fluorine-containing water-proof aagent are still that the acrylic polymer of the Long carbon chain containing perfluor is (general in the market All it is the perfluoroalkyl acrylate containing 8 carbon).With progress of research, people gradually have found the acrylic acid of perfluor Long carbon chain Containing perfluorooctane sulfonyl compound (PFOS) and perfluoro caprylic acid ammonium compounds (PFOA) in esters polymer, and both objects Matter be difficult to degrade (PFOS/PFOA is considered as one of organic pollution for being most difficult to degradation), bioaccumulation and environmental toxicity compared with Seriously.Animal experiments show that PFOS can have an impact heredity, reproduction, development, liver crucian carp, immune and angiocarpy etc..In addition also have People points out that PFOS is possible to carcinogenic.Persistence, toxicity and the bioaccumulation that PFOS/PFOA in 2002 is considered in the environment be The significant problem of threatening environment and human health.
In western developed country, some policies and regulations are promulgated in succession.European Parliament limited the quantity to related PFOS in 2006 Relevant regulations are done.To 2015, own completely forbid in the U.S. used PFOS/PFOA.Due to relevant limitation, develop a kind of new , without PFOS/PFOA, and the good fabric waterproofing agent of waterproof effect oneself become research hotspot in recent years.Especially easily drop Solution, water-fastness water-proof aagent will be as new developing direction.
Although the country puts into effect corresponding policies and regulations not yet, C8 main products are also using, international to limit the use of Certain influence certainly will be also generated to domestic market with disabling, the waterproofing agent of short carbon chain (as long as using C6 as the product of representative) Researching and developing and putting goods on the market has been trend of the times.Some international chemical industry major companies, have had launched C6 waterproofing agent products.In addition without Harmless, the environmental-friendly no fluoro water proofing agent of poison is also another direction, oneself is released without fluoro water proofing agent for German Wa Ke companies, although nothing The characteristics of effect of fluoro water proofing agent is slightly worse compared to fluorine-containing water repellent, water-wash resistance is not also strong, but its is environmental-friendly is that the latter can not It is equal to, it is believed that in the near future, no fluoro water proofing agent will be main product.
Invention content
The purpose of the present invention is to provide a kind of waterproofing agent of environment-friendly type, there is excellent waterproof effect and water-fast simultaneously Wash performance.
The present invention is to implement to realize by following technology:
A kind of environment-friendly watertight washes waterproofing agent, it is characterised in that and the waterproofing agent includes a kind of hyper-branched polyester modifier, Its molecular formula is:
Wherein A-OH is trimethylolpropane and 2,2- dihydroxymethyls Hyper-branched polyester prepared by propionic acid reaction, the hydroxyl value of x+y≤A, x:Y is 8.4-30.8:3.6-13.2.
The environment-friendly watertight washes waterproofing agent also comprising fibrillation plant fiber, the fibrillation plant fiber with it is hyperbranched The mass ratio 1 of polyester modification object:2-5, the avarage fiber diameter of shown fibrillation plant fiber is 50-100nm..
The present invention also provides the preparation methods that environment-friendly watertight washes waterproofing agent, include the following steps:
(1) trimethylolpropane and 2,2- dihydromethyl propionic acids are pressed 1:9-1:41 molar ratio mixings, are warming up to 140-160 DEG C, argon gas protection is lower to add in mass fraction 0.5-1% catalyst p-methyl benzenesulfonic acids, and 400-500Pa is decompressed to after reacting 2-3h, The reaction was continued 2-3h stops decompression and being cooled to 40-60 DEG C, adds in a certain amount of acetone solution, then precipitates to obtain product through ether and surpass Branched polyester;
(2) by lysine diisocyanate and hydroxy-ethyl acrylate in molar ratio 1:1 mixing reacts 10- at 40-45 DEG C 12h obtains semi-additive product LDI-HEA.
(3) hyper-branched polyester, succinic anhydride and the acetone that secondly step 1 is obtained stir and evenly mix, and are reacted at 90-95 DEG C 4-5h is cooled to 45-50 DEG C of addition LDI-HEA, the reaction was continued 5-6h, stops reaction, and product is precipitated through acetone ether, and vacuum is done It is dry to obtain product.
Further, trimethylolpropane described in step 1 and 2,2- dihydromethyl propionic acid press 1:20 molar ratio mixings.
Further, hyper-branched polyester, succinic anhydride and LDI-HEA molar ratios are 1 in step 3:8.4-30.8:3.6- 13.2
Further, hyper-branched polyester, succinic anhydride and LDI-HEA molar ratios 1:16.1:6.9.
A-OH is that trimethylolpropane reacts the hyper-branched polyester prepared with 2,2- dihydromethyl propionic acids.The hyperbranched poly Ester constantly carries out hyperbranched reaction, constantly extends away, shape according to the branching agent 2 of addition, the content of 2- dihydromethyl propionic acids Into hyperbranched macromolecular.One of specific example is as follows:
But A-OH is not limited to the example, can be using trimethylolpropane as Centronucleus, hyper-branched polyester of 2, the 2- dihydromethyl propionic acids for the arbitrary extension degree of branched monomer.
The reaction mechanism of step 1 is as follows:
It wherein can be according to the difference of n, so as to constantly extend hyper-branched polyester.
The reaction mechanism of step 3 is as follows:
Wherein, the hydroxyl value of x+y≤A.
Beneficial effects of the present invention:
(1) present invention provides a kind of preparation method of modified ultra-branching object, distinctive multi-active base group and reticular structure, Make the waterproofing agent that there is excellent waterproof effect and water-wash resistance.
(2) while in the waterproofing agent of the present invention fibrillation plant fiber of nanoscale can also be added, is had abundant Surface area and active group, can be effectively dispersed in waterproofing agent and be combined with modified ultra-branching object, in fabric surface It during effect, can more effectively attach on the surface of fabric fibre, form more firm waterproof layer and increase the residence time, from And improve waterproof rate;
(3) present invention because in preparation process free-floride remove fluorine-containing water repellent from and bring the harm such as PFOS/PFOA, while prepared Also the harmful substances such as formaldehydeless are a waterproofing agents of new generation with environment-friendly advantage in journey and final finished.
Specific embodiment
With reference to specific embodiment, the present invention will be further described.
The preparation of fibrillation plant fiber:Sodium hydroxide solution is added in during NBKP is starched, is mixed, is warming up to 80 DEG C instead After answering 1 hour, defibering obtains microfibril in 30 minutes under the screw speed of 2000rpm in addition twin shaft kneading machine after neutralization concentration Vegetable-fibre slurry, by characterizing its average diameter as 86nm.
Implement 1
1. trimethylolpropane and 2,2- dihydromethyl propionic acids are pressed 1 respectively:9 molar ratio mixings, are warming up to 140-160 DEG C, argon gas protection is lower to add in mass fraction 0.5-1% catalyst p-methyl benzenesulfonic acids, and 400-500Pa is decompressed to after reacting 2-3h, The reaction was continued 2-3h stops decompression and being cooled to 40-60 DEG C, adds in a certain amount of acetone solution, then precipitates to obtain product through ether and surpass Branched polyester.
2. by lysine diisocyanate and hydroxy-ethyl acrylate in molar ratio 1:1 mixing reacts 10- at 40-45 DEG C 12h obtains semi-additive product LDI-HEA.
3. the hyper-branched polyester, succinic anhydride and a certain amount of acetone in step 1 stir and evenly mix, anti-at 90-95 DEG C 4-5h is answered, is cooled to 45-50 DEG C of addition LDI-HEA, the reaction was continued 5-6h, stopping reaction.Product is precipitated through acetone ether, vacuum Dry hyper-branched polyester modifier.(hyper-branched polyester, succinic anhydride and LDI-HEA molar ratios are 1:8.4:3.6)
Implement 2
1. trimethylolpropane and 2,2- dihydromethyl propionic acids are pressed 1 respectively:9 molar ratio mixings, are warming up to 140-160 DEG C, argon gas protection is lower to add in mass fraction 0.5-1% catalyst p-methyl benzenesulfonic acids, and 400-500Pa is decompressed to after reacting 2-3h, The reaction was continued 2-3h stops decompression and being cooled to 40-60 DEG C, adds in a certain amount of acetone solution, then precipitates to obtain product through ether and surpass Branched polyester.
2. by lysine diisocyanate and hydroxy-ethyl acrylate in molar ratio 1:1 mixing reacts 10- at 40-45 DEG C 12h obtains semi-additive product LDI-HEA.
3. the hyper-branched polyester, succinic anhydride and a certain amount of acetone in step 1 stir and evenly mix, anti-at 90-95 DEG C 4-5h is answered, is cooled to 45-50 DEG C of addition LDI-HEA, the reaction was continued 5-6h, stopping reaction.Product is precipitated through acetone ether, vacuum Dry hyper-branched polyester modifier.(hyper-branched polyester, succinic anhydride and LDI-HEA molar ratios are 1:6:6)
Implement 3
1. trimethylolpropane and 2,2- dihydromethyl propionic acids are pressed 1 respectively:20 molar ratio mixings, are warming up to 140-160 DEG C, argon gas protection is lower to add in mass fraction 0.5-1% catalyst p-methyl benzenesulfonic acids, and 400-500Pa is decompressed to after reacting 2-3h, The reaction was continued 2-3h stops decompression and being cooled to 40-60 DEG C, adds in a certain amount of acetone solution, then precipitates to obtain product through ether and surpass Branched polyester.
2. by lysine diisocyanate and hydroxy-ethyl acrylate in molar ratio 1:1 mixing reacts 10- at 40-45 DEG C 12h obtains semi-additive product LDI-HEA.
3. the hyper-branched polyester, succinic anhydride and a certain amount of acetone in step 1 stir and evenly mix, anti-at 90-95 DEG C 4-5h is answered, is cooled to 45-50 DEG C of addition LDI-HEA, the reaction was continued 5-6h, stopping reaction.Product is precipitated through acetone ether, vacuum Dry hyper-branched polyester modifier.(hyper-branched polyester, succinic anhydride and LDI-HEA molar ratios are 1:16.1:6.9)
Implement 4
1. trimethylolpropane and 2,2- dihydromethyl propionic acids are pressed 1 respectively:20 molar ratio mixings, are warming up to 140-160 DEG C, argon gas protection is lower to add in mass fraction 0.5-1% catalyst p-methyl benzenesulfonic acids, and 400-500Pa is decompressed to after reacting 2-3h, The reaction was continued 2-3h stops decompression and being cooled to 40-60 DEG C, adds in a certain amount of acetone solution, then precipitates to obtain product through ether and surpass Branched polyester.
2. by lysine diisocyanate and hydroxy-ethyl acrylate in molar ratio 1:1 mixing reacts 10- at 40-45 DEG C 12h obtains semi-additive product LDI-HEA.
3. the hyper-branched polyester, succinic anhydride and a certain amount of acetone in step 1 stir and evenly mix, anti-at 90-95 DEG C 4-5h is answered, is cooled to 45-50 DEG C of addition LDI-HEA, the reaction was continued 5-6h, stopping reaction.Product is precipitated through acetone ether, vacuum Dry hyper-branched polyester modifier.(hyper-branched polyester, succinic anhydride and LDI-HEA molar ratios are 1:11.5:11.5)
Implement 5
1. trimethylolpropane and 2,2- dihydromethyl propionic acids are pressed 1 respectively:41 molar ratio mixings, are warming up to 140-160 DEG C, argon gas protection is lower to add in mass fraction 0.5-1% catalyst p-methyl benzenesulfonic acids, and 400-500Pa is decompressed to after reacting 2-3h, The reaction was continued 2-3h stops decompression and being cooled to 40-60 DEG C, adds in a certain amount of acetone solution, then precipitates to obtain product through ether and surpass Branched polyester.
2. by lysine diisocyanate and hydroxy-ethyl acrylate in molar ratio 1:1 mixing reacts 10- at 40-45 DEG C 12h obtains semi-additive product LDI-HEA.
3. the hyper-branched polyester, succinic anhydride and a certain amount of acetone in step 1 stir and evenly mix, anti-at 90-95 DEG C 4-5h is answered, is cooled to 45-50 DEG C of addition LDI-HEA, the reaction was continued 5-6h, stopping reaction.Product is precipitated through acetone ether, vacuum Dry hyper-branched polyester modifier.(hyper-branched polyester, succinic anhydride and LDI-HEA molar ratios are 1:30.8:13.2)
Implement 6
1. trimethylolpropane and 2,2- dihydromethyl propionic acids are pressed 1 respectively:41 molar ratio mixings, are warming up to 140-160 DEG C, argon gas protection is lower to add in mass fraction 0.5-1% catalyst p-methyl benzenesulfonic acids, and 400-500Pa is decompressed to after reacting 2-3h, The reaction was continued 2-3h stops decompression and being cooled to 40-60 DEG C, adds in a certain amount of acetone solution, then precipitates to obtain product through ether and surpass Branched polyester.
2. by lysine diisocyanate and hydroxy-ethyl acrylate in molar ratio 1:1 mixing reacts 10- at 40-45 DEG C 12h obtains semi-additive product LDI-HEA.
3. the hyper-branched polyester, succinic anhydride and a certain amount of acetone in step 1 stir and evenly mix, anti-at 90-95 DEG C 4-5h is answered, is cooled to 45-50 DEG C of addition LDI-HEA, the reaction was continued 5-6h, stopping reaction.Product is precipitated through acetone ether, vacuum Dry hyper-branched polyester modifier.(hyper-branched polyester, succinic anhydride and LDI-HEA molar ratios are 1:22:22)
6 kinds of hyper-branched polyester modifiers that above-mentioned implementation obtains are carried out to be re-dubbed waterproofing agent, reference standard AATCC is carried out Waterproof test, then the testing water-proof performance after 10 standard water washings.
Number Waterproof effect Waterproof effect after 10 washings
Embodiment 1 95 85
Embodiment 2 95 80
Embodiment 3 100 95+
Embodiment 4 100 90+
Embodiment 5 95 90
Embodiment 6 95 85+
Embodiment 7
Hyper-branched polyester modifier prepared by embodiment 3 is with fibrillation plant fiber according to 3:1 mass ratio is answered It is made into waterproofing agent.The waterproofing agent reference standard AATCC of embodiment 3 and embodiment 7 is subjected to waterproof test, then through 10,20 deutero-albumoses Testing water-proof performance after quasi- water washing
Number Waterproof effect Waterproof effect after 10 washings Waterproof effect after 20 washings
Embodiment 3 100 95+ 80+
Embodiment 7 100 95+ 90+
The present invention provides a kind of preparation method for overspending compound, distinctive multi-active base group and reticular structure, makes this anti- Aqua has excellent waterproof effect and water-wash resistance.Comparative example 3 finds that addition fibrillation plant is fine with embodiment 7 simultaneously Dimension can play better enhancing effect, and there is the hyper-branched polyester modifier with the present invention to cooperate with the modified effect of enhancing.
Finally it should be noted that present invention disclosed above preferred embodiment is only intended to help to illustrate the present invention.It is excellent Embodiment is selected not limited the invention to the specific embodiments described there is no all details of detailed descriptionthe.Obviously, root According to the content of this specification, can make many modifications and variations.This specification is chosen and specifically describes these embodiments, be in order to The principle of the present invention and practical application are preferably explained, so as to which skilled artisan be enable to be best understood by and utilized The present invention.The invention is limited only by the claims and the full scope thereof and equivalents thereof.

Claims (6)

1. a kind of environment-friendly watertight washes waterproofing agent, it is characterised in that the waterproofing agent includes a kind of hyper-branched polyester modifier, Molecular formula is:
, wherein A-OH is trimethylolpropane and 2,2- dihydromethyl propionic acid React the hyper-branched polyester prepared, the hydroxyl value of x+y≤A, x:Y is 8.4-30.8:3.6-13.2.
2. environment-friendly watertight according to claim 1 washes waterproofing agent, it is characterised in that the environment-friendly watertight washes waterproofing agent Also comprising fibrillation plant fiber, the mass ratio 1 of the fibrillation plant fiber and hyper-branched polyester modifier:2-5, it is shown micro- The avarage fiber diameter of fibrillation plant fiber is 50-100nm.
3. a kind of method for preparing environment-friendly watertight as described in claim 1 and washing waterproofing agent, includes the following steps:
(1)Trimethylolpropane and 2,2- dihydromethyl propionic acids are pressed 1:9-1:41 molar ratio mixings, are warming up to 140-160 DEG C, Argon gas protection is lower to add in mass fraction 0.5-1% catalyst p-methyl benzenesulfonic acids, is decompressed to 400-500Pa after reacting 2-3h, continues 2-3h is reacted, stops decompression and being cooled to 40-60 DEG C, add in a certain amount of acetone solution, then through ether precipitates to obtain product hyperbranched Polyester;
(2)By lysine diisocyanate and hydroxy-ethyl acrylate in molar ratio 1:1 mixing reacts 10-12h at 40-45 DEG C, Obtain semi-additive product LDI-HEA;
(3)Hyper-branched polyester, succinic anhydride and the acetone that step 1 is obtained stir and evenly mix, and 4-5h is reacted at 90-95 DEG C, drop Temperature stops reaction, product is precipitated through acetone ether, is dried in vacuo to obtain production to 45-50 DEG C of addition LDI-HEA, the reaction was continued 5-6h Product.
4. preparation method according to claim 2, it is characterised in that trimethylolpropane described in step 1 and 2,2- dihydroxy Methylpropanoic acid presses 1:20 molar ratio mixings.
5. preparation method according to claim 2, it is characterised in that hyper-branched polyester, succinic anhydride and LDI- in step 3 HEA molar ratios are 1:8.4-30.8:3.6-13.2.
6. preparation method according to claim 2, it is characterised in that hyper-branched polyester, succinic anhydride and LDI-HEA moles Than 1:16.1:6.9.
CN201810083735.3A 2018-01-18 2018-01-29 A kind of environment-friendly watertight washes waterproofing agent and preparation method thereof Pending CN108166261A (en)

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CN112252026A (en) * 2020-09-23 2021-01-22 浙江桐星纺织科技发展股份有限公司 Production process of environment-friendly phosphorus-based low-weight-gain flame-retardant fabric
CN112321909A (en) * 2020-11-19 2021-02-05 侯光宇 High-strength wear-resistant natural rubber composite material and preparation method thereof

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