CN104086747A - Lightweight polyurethane foam for automobile roof and preparation method of lightweight polyurethane foam - Google Patents
Lightweight polyurethane foam for automobile roof and preparation method of lightweight polyurethane foam Download PDFInfo
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- CN104086747A CN104086747A CN201410332420.XA CN201410332420A CN104086747A CN 104086747 A CN104086747 A CN 104086747A CN 201410332420 A CN201410332420 A CN 201410332420A CN 104086747 A CN104086747 A CN 104086747A
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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
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
- C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
- C08G18/7657—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings
- C08G18/7664—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing alkylene polyphenyl groups
- C08G18/7671—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing alkylene polyphenyl groups containing only one alkylene bisphenyl group
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- 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
- C08G18/0895—Manufacture of polymers by continuous processes
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- 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
- C08G18/4009—Two or more macromolecular compounds not provided for in one single group of groups C08G18/42 - C08G18/64
- C08G18/4072—Mixtures of compounds of group C08G18/63 with other macromolecular 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
- C08G18/28—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
- C08G18/4804—Two or more polyethers of different physical or chemical nature
- C08G18/482—Mixtures of polyethers containing at least one polyether containing nitrogen
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- 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
- C08G18/487—Polyethers containing cyclic groups
- C08G18/4883—Polyethers containing cyclic groups containing cyclic groups having at least one oxygen atom in the ring
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- 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
- C08G18/50—Polyethers having heteroatoms other than oxygen
- C08G18/5021—Polyethers having heteroatoms other than oxygen having nitrogen
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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
- C08G18/40—High-molecular-weight compounds
- C08G18/63—Block or graft polymers obtained by polymerising compounds having carbon-to-carbon double bonds on to polymers
- C08G18/632—Block or graft polymers obtained by polymerising compounds having carbon-to-carbon double bonds on to polymers onto polyethers
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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
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
- C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
- C08G18/7657—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings
- C08G18/7664—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing alkylene polyphenyl groups
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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
- C08G2110/00—Foam properties
- C08G2110/0083—Foam properties prepared using water as the sole blowing agent
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Abstract
The invention relates to lightweight polyurethane foam for an automobile roof, and a preparation method of the lightweight polyurethane foam, belonging to the technical field of polyurethane. The preparation method comprises the following steps: under the action of a catalyst, water and non-ionic silicone oil surfactant under the control of precise temperature, flow and pressure, delivering a mixture of a plurality of polyethers and a mixture of more than two isocyanates into a mixing head of a continuous foaming line for continuously foaming. The foam product is low in density, the raw material cost of the roof production can be greatly lowered, and further the market competiveness of products can be enhanced.
Description
Technical field
The present invention relates to a kind of roof of the vehicle light polyurethane foam and preparation method thereof, be specifically related to a kind of production method of preparing automobile calash for low-cost wet method, belong to polyurethanes technology field.
Background technology
Along with the widespread use of polyurethane foam in industry and daily life.They are in the various inside gadgets of various parts, particularly automobile of manufacturing automobile, and polyurethane semi-rigid foam plastics occupy considerable status.Especially in the preparation of the top of automobile, just used the semihard foam material of urethane as main integral part.Polyurethane semihard foam is under the effect of polyurethane binder, compound under the mould of 130 DEG C of left and right pressurization with glass and glued membrane and non-woven fabrics, forms automobile calash.This technique can be automobile factory the product that meets rigidity and service requirements is provided, as ductility, and the dimensional stability of resistance to environmental testing, etc.
In recent years, along with being growing more intense of domestic automobile inside gadget industry competition, the requirement of all kinds of raw-material cost degradations of ceiling has also been proposed to further requirement, and polyurethane foam is the main raw in wet therapy forming process, its cost degradation will directly reduce the main raw material cost of ceiling finished product, thereby makes enterprise have more competitive power.Meanwhile, because the requirement of large space in vehicle energy saving lightweight and vehicle body is increasingly strong, car manufactures heals and becomes complicated the cavity design of roof of the vehicle in recent years, therefore the performance of polyurethane foam is also day by day improved.Generally speaking, domestic market mainly comprises the requirement of ceiling foam: low density, high ductibility, the rigidity requirement of formability and foam itself.
The polyurethane foam products for automobile wet method top using on existing current market is in addition all to complete by the production technique of box foaming, and the method investment is little, is suitable for simplification product and application in a small amount.Such as, under mould and artificial sufficient condition, producing a bubble piece average per half an hour has been high-level efficiency, that is to say that per tour workman can produce 12-16 bubble piece.
Summary of the invention
Object of the present invention is being produced a kind of light polyurethane foam of the automobile calash for wet method, and what this foam employing ODS was zero is full water foamed, and percentage of open area is high, and can on common MAXFOAM foam production line, carry out large-scale serialization foaming.This foam has light weight, low smell, and moulding unit elongation is high, and moulding suction glue amount is high, and has the advantages such as good sound absorption qualities.The production technique that foam is taked has been broken the poor efficiency of traditional box foam process, is particularly suitable for large-scale industrial production, and the stability of product is also improved simultaneously.
According to technical scheme provided by the invention, a kind of roof of the vehicle light polyurethane foam, formula rate is as follows by weight:
A material: 100 parts of polyether glycols, silicone oil 0.5-2 part, water 3.5-5.5 part, active catalyst 0.2-1.0 part, low volatility catalyzer 0.01-0.2 part, oxidation inhibitor 0.1-1.0 part;
B material: the mixture that pure MDI or polymeric MDI and MDI mass ratio are 50 ~ 90:10 ~ 50;
The ratio of the hydroxyl equivalent in described B material in contained isocyanurate equivalent and A material is 1-1.25;
After being mixed in proportion to foaming, above-mentioned material obtains foam density at 24-30kg/m
3urethane, for the production lightweight automobile calash at wet processing.
Foam of the present invention may be defined as semi-hard polyurethane foam, and it is mainly used in the production of wet method roof of the vehicle, and it has enough strengths of materials, has good ductility and formability simultaneously.
The production of this foam is the mixture by adopting multiple polyethers, at catalyzer, water, under the effect of non-ionic type silicon oil surface activity agent with the mixture of two or more isocyanic ester, under accurate temperature, flow and pressure-controlling, the mixing head of sending into continuous foamed line carries out continuous foamed.
In described A material, polyether glycol is composed as follows:
Polyethers A, polymer polyatomic alcohol, hydroxyl value 30-300mgKOH/g, flow is 30-60 pph;
Polyethers B, the polyether glycol that hydroxyl value is 28-35mgKOH/g or polymer polyatomic alcohol, flow is 0-50pph;
Polyethers C, the phthalic anhydride kind polyester polyether glycol that hydroxyl value is 200-500mgKOH/g, flow is 0-30pph;
Polyethers D, the polyether glycol that the sucrose that hydroxyl value is 200-500mgKOH/g or sorbyl alcohol are initial, flow is 5-15pph;
Polyethers E, the quadrol polyethers that hydroxyl value is 450-800mgKOH/g, flow is 0-15pph;
Polyethers F, the initial polyether glycol of glycerine that hydroxyl value is 160-240mgKOH/g, flow is 0-15pph.
Described active catalyst is the one in DMEA, HUNTSMAN Jeffcat ZF10, ZR50, Jeffcat DFA or Dabaco NE300; Described low volatility catalyzer is T10, T9 or T12; Described oxidation inhibitor is the PUR68 that BASF produces.
The preparation method of light polyurethane foam for described roof of the vehicle, step is as follows:
(1) preparation of polyethers material: polyether glycol is sent in material storing tank separately, then made the temperature of material be controlled at 20-30 DEG C by the heating/cooling system of system material, material is in tank more than standing 48h;
(2) preparation of isocyanic ester: by B material, the mixture that pure MDI or polymeric MDI and MDI mass ratio are 50 ~ 90:10 ~ 50, squeezes into another and produce batch can, keeps feed temperature to maintain 20-30 DEG C; Make equally material in tank, leave standstill 48h;
(3) preparation of unclassified stores: by silicone oil 0.5-2 part, water 3.5-5.5 part, active catalyst 0.2-1.0 part, low volatility catalyzer 0.01-0.2 part, oxidation inhibitor 0.1-1.0 part adds to produces required amount, stand-by;
(4) tinuous production foaming: under the control of computer, according to the formula rate of setting, use the metering of high-low pressure volume pump to be transported to mixing head of foaming machine above-mentioned raw materials, system foaming under high-speed stirring; The ratio of the hydroxyl equivalent in the B material wherein mixing in the relative A material of the equivalent of isocyanic ester material is 1-1.25; The stirring velocity that feed liquid enters after mixing head is controlled at 2000-5000rpm/min, and line speed is 3-8m/min;
Conventional continuous foamed line essentially consist is as follows: computerized control system, constant temperature storage tank, Preblend system, online raw material temperature control system (heat exchanger etc.), accurate raw material metering pump system, mixing head system, foaming production line, online foam diced system.
All raw materials are independently by metering system separately, under the accurate parameter control of Controlling System, sending into frothing head mixes, then the material having mixed is delivered to foam films from discharge port in a continuous manner and is foamed, and needed foam length is removed and cut into the foam that plays a part completely to send out from foaming line incessantly simultaneously under travelling belt.
By adjusting preposition lifter plate control foaming quality and all whole degree of bubble piece; Foam is produced continuously and is started to carry out cutting on line the online product width of adjusting according to size afterwards;
(5) slaking: the bubble piece after the cutting of step (4) gained, through 48-72h slaking, is obtained to product roof of the vehicle light polyurethane foam.
Roof of the vehicle is greater than 95% with the percentage of open area of light polyurethane foam, is conducive to improve the suction glue amount of foam and the sound absorption qualities of ceiling goods.
Its catalyzer refers to active catalyst, the part functional group of this catalyzer participates in chemical reaction in polyurethane foam preparation, its reaction product can become the integral part of foamy structure firmly, can externally not distribute and causes peculiar smell in car and affect the health of the personnel in car.
Beneficial effect of the present invention: the present invention is mainly used in continuous foamed production line, the box explained hereafter amount of a day only needs just can complete for 20 minutes, and can convert aborning product size in continuous lines; Be applicable in enormous quantities, many sizes, foaming line manually can with other posies use, effectively improved production efficiency.In addition, output is larger, and raw material volume ratio is higher.At bubble piece, advantage is more qualitatively in the continuous foamed and box foaming of generally acknowledging in industry, and accurately, abscess is even in raw material metering; Bubble piece upper, middle and lower difference is dwindled; Bubble piece top and bottom unavailable part are controlled; Can adopt the volume ratio of multiple flat-top technology raising foam etc.The density of froth product of the present invention is low, the raw materials cost that can significantly low ceiling be produced, thus improve the competitiveness of product in market.
Brief description of the drawings
Fig. 1 is drying process schematic diagram of the present invention.
Embodiment
Embodiment 1
A kind of roof of the vehicle light polyurethane foam, formula rate is as follows by weight:
A material: 100 parts of polyether glycols, 0.5 part of silicone oil, 3.5 parts, water, 0.2 part of active catalyst, 0.01 part of low volatility catalyzer, 0.1 part, oxidation inhibitor;
B material: the mixture that pure MDI or polymeric MDI and MDI mass ratio are 50:10;
The ratio of the hydroxyl equivalent in described B material in contained isocyanurate equivalent and A material is 1-1.25;
After being mixed in proportion to foaming, above-mentioned material obtains foam density at 24kg/m
3urethane, for the production lightweight automobile calash at wet processing.
In described A material, polyether glycol is composed as follows:
Polyethers A, polymer polyatomic alcohol, hydroxyl value 100mgKOH/g, flow is 30pph;
Polyethers B, the polyether glycol that hydroxyl value is 28mgKOH/g or polymer polyatomic alcohol, flow is 10pph;
Polyethers C, the phthalic anhydride kind polyester polyether glycol that hydroxyl value is 200mgKOH/g, flow is 10pph;
Polyethers D, the polyether glycol that the sucrose that hydroxyl value is 200mgKOH/g or sorbyl alcohol are initial, flow is 5pph;
Polyethers E, the quadrol polyethers that hydroxyl value is 450mgKOH/g, flow is 5pph;
Polyethers F, the initial polyether glycol of glycerine that hydroxyl value is 160mgKOH/g, flow is 2pph.
Described active catalyst is DMEA; Described low volatility catalyzer is T10; Described oxidation inhibitor is PUR68.
The preparation method of light polyurethane foam for described roof of the vehicle, as shown in Figure 1, step is as follows:
(1) preparation of polyethers material: polyether glycol is sent in material storing tank separately, then made the temperature of material be controlled at 20 DEG C by the heating/cooling system of system material, material is in tank more than standing 48h;
(2) preparation of isocyanic ester: B material is squeezed into another and produce batch can, keep feed temperature to maintain 20 DEG C; Make equally material in tank, leave standstill 48h;
(3) preparation of unclassified stores: by silicone oil, water, active catalyst, low volatility catalyzer, oxidation inhibitor adds to produces required amount, stand-by;
(4) tinuous production foaming: under the control of computer, according to the formula rate of setting, use the metering of high-low pressure volume pump to be transported to mixing head of foaming machine above-mentioned raw materials, system foaming under high-speed stirring; The ratio of the hydroxyl equivalent in the B material wherein mixing in the relative A material of the equivalent of isocyanic ester material is 1; The stirring velocity that feed liquid enters after mixing head is controlled at 2000rpm/min, and line speed is 3m/min;
By adjusting preposition lifter plate control foaming quality and all whole degree of bubble piece; Foam is produced continuously and is started to carry out cutting on line the online product width of adjusting according to size afterwards;
(5) slaking: the bubble piece after the cutting of step (4) gained, through 48h slaking, is obtained to product roof of the vehicle light polyurethane foam.
Embodiment 2
A kind of roof of the vehicle light polyurethane foam, as shown in Figure 1, formula rate is as follows by weight:
A material: 100 parts of polyether glycols, 2 parts of silicone oil, 5.5 parts, water, 1.0 parts of active catalyst, 0.2 part of low volatility catalyzer, 1.0 parts, oxidation inhibitor;
B material: the mixture that pure MDI or polymeric MDI and MDI mass ratio are 90:50;
The ratio of the hydroxyl equivalent in described B material in contained isocyanurate equivalent and A material is 1.25;
After being mixed in proportion to foaming, above-mentioned material obtains foam density at 30kg/m
3urethane, for the production lightweight automobile calash at wet processing.
In described A material, polyether glycol is composed as follows:
Polyethers A, polymer polyatomic alcohol, hydroxyl value 300mgKOH/g, flow is 60 pph;
Polyethers B, the polyether glycol that hydroxyl value is 35mgKOH/g or polymer polyatomic alcohol, flow is 50pph;
Polyethers C, the phthalic anhydride kind polyester polyether glycol that hydroxyl value is 500mgKOH/g, flow is 30pph;
Polyethers D, the polyether glycol that the sucrose that hydroxyl value is 500mgKOH/g or sorbyl alcohol are initial, flow is 15pph;
Polyethers E, the quadrol polyethers that hydroxyl value is 800mgKOH/g, flow is 15pph;
Polyethers F, the initial polyether glycol of glycerine that hydroxyl value is 240mgKOH/g, flow is 15pph.
Described active catalyst is Jeffcat ZF10; Described low volatility catalyzer is T9; Described oxidation inhibitor is PUR68.
The preparation method of light polyurethane foam for described roof of the vehicle, step is as follows:
(1) preparation of polyethers material: polyether glycol is sent in material storing tank separately, then made the temperature of material be controlled at 30 DEG C by the heating/cooling system of system material, material is in tank more than standing 48h;
(2) preparation of isocyanic ester: by B material, the mixture that pure MDI or polymeric MDI and MDI mass ratio are 90:50, squeezes into another and produce batch can, keeps feed temperature to maintain 30 DEG C; Make equally material in tank, leave standstill 48h;
(3) preparation of unclassified stores: by silicone oil, water, active catalyst, low volatility catalyzer, oxidation inhibitor adds to produces required amount, stand-by;
(4) tinuous production foaming: under the control of computer, according to the formula rate of setting, use the metering of high-low pressure volume pump to be transported to mixing head of foaming machine above-mentioned raw materials, system foaming under high-speed stirring; The ratio of the hydroxyl equivalent in the B material wherein mixing in the relative A material of the equivalent of isocyanic ester material is 1.25; The stirring velocity that feed liquid enters after mixing head is controlled at 5000rpm/min, and line speed is 8m/min;
By adjusting preposition lifter plate control foaming quality and all whole degree of bubble piece; Foam is produced continuously and is started to carry out cutting on line the online product width of adjusting according to size afterwards;
(5) slaking: the bubble piece after the cutting of step (4) gained, through 72h slaking, is obtained to product roof of the vehicle light polyurethane foam.
Embodiment 3
A kind of roof of the vehicle light polyurethane foam, as shown in Figure 1, formula rate is as follows by weight:
A material: 100 parts of polyether glycols, 1 part of silicone oil, 4 parts, water, 0.6 part of active catalyst, 0.1 part of low volatility catalyzer, 0.5 part, oxidation inhibitor;
B material: the mixture that pure MDI or polymeric MDI and MDI mass ratio are 70:30;
The ratio of the hydroxyl equivalent in described B material in contained isocyanurate equivalent and A material is 1.15;
After being mixed in proportion to foaming, above-mentioned material obtains foam density at 24-30kg/m
3urethane, for the production lightweight automobile calash at wet processing.
In described A material, polyether glycol is composed as follows:
Polyethers A, polymer polyatomic alcohol, hydroxyl value 200mgKOH/g, flow is 50 pph;
Polyethers B, the polyether glycol that hydroxyl value is 30mgKOH/g or polymer polyatomic alcohol, flow is 30pph;
Polyethers C, the phthalic anhydride kind polyester polyether glycol that hydroxyl value is 300mgKOH/g, flow is 20pph;
Polyethers D, the polyether glycol that the sucrose that hydroxyl value is 300mgKOH/g or sorbyl alcohol are initial, flow is 10pph;
Polyethers E, the quadrol polyethers that hydroxyl value is 600mgKOH/g, flow is 10pph;
Polyethers F, the initial polyether glycol of glycerine that hydroxyl value is 200mgKOH/g, flow is 10pph.
Described active catalyst is ZR50; Described low volatility catalyzer is T12; Described oxidation inhibitor is PUR68.
The preparation method of light polyurethane foam for described roof of the vehicle, step is as follows:
(1) preparation of polyethers material: polyether glycol is sent in material storing tank separately, then made the temperature of material be controlled at 25 DEG C by the heating/cooling system of system material, material is in tank more than standing 48h;
(2) preparation of isocyanic ester: by B material, the mixture that pure MDI or polymeric MDI and MDI mass ratio are 70:30, squeezes into another and produce batch can, keeps feed temperature to maintain 25 DEG C; Make equally material in tank, leave standstill 48h;
(3) preparation of unclassified stores: by silicone oil, water, active catalyst, low volatility catalyzer, oxidation inhibitor adds to produces required amount, stand-by;
(4) tinuous production foaming: under the control of computer, according to the formula rate of setting, use the metering of high-low pressure volume pump to be transported to mixing head of foaming machine above-mentioned raw materials, system foaming under high-speed stirring; The ratio of the hydroxyl equivalent in the B material wherein mixing in the relative A material of the equivalent of isocyanic ester material is 1.1; The stirring velocity that feed liquid enters after mixing head is controlled at 4000rpm/min, and line speed is 5m/min;
By adjusting preposition lifter plate control foaming quality and all whole degree of bubble piece; Foam is produced continuously and is started to carry out cutting on line the online product width of adjusting according to size afterwards;
(5) slaking: the bubble piece after the cutting of step (4) gained, through 48-72h slaking, is obtained to product roof of the vehicle light polyurethane foam.
The present invention is mainly used in continuous foamed production line, and the box explained hereafter amount of a day only needs just can complete for 20 minutes, and can convert aborning product size in continuous lines.This technique is applicable in enormous quantities very much, many sizes, foaming line manually can with other posies use, effectively improved production efficiency.In addition, output is larger, and raw material volume ratio is higher.At bubble piece, advantage is more qualitatively in the continuous foamed and box foaming of generally acknowledging in industry, and accurately, abscess is even in raw material metering; Bubble piece upper, middle and lower difference is dwindled; Bubble piece top and bottom unavailable part are controlled; Can adopt the volume ratio of multiple flat-top technology raising foam etc.Special character of the present invention is that the density of froth product of the present invention is low, the raw materials cost that can significantly low ceiling be produced, thereby the raising competitiveness of product in market.
Claims (4)
1. a roof of the vehicle light polyurethane foam, is characterized in that: formula rate is as follows by weight:
A material: 100 parts of polyether glycols, silicone oil 0.5-2 part, water 3.5-5.5 part, active catalyst 0.2-1.0 part, low volatility catalyzer 0.01-0.2 part, oxidation inhibitor 0.1-1.0 part;
B material: the mixture that pure MDI or polymeric MDI and MDI mass ratio are 50 ~ 90:10 ~ 50;
The ratio of the hydroxyl equivalent in described B material in contained isocyanurate equivalent and A material is 1-1.25;
After being mixed in proportion to foaming, above-mentioned material obtains foam density at 24-30kg/m
3urethane, for the production lightweight automobile calash at wet processing.
2. roof of the vehicle light polyurethane foam as claimed in claim 1, is characterized in that: in described A material, polyether glycol is composed as follows:
Polyethers A, polymer polyatomic alcohol, hydroxyl value 30-300mgKOH/g, flow is 30-60 pph;
Polyethers B, the polyether glycol that hydroxyl value is 28-35mgKOH/g or polymer polyatomic alcohol, flow is 0-50pph;
Polyethers C, the phthalic anhydride kind polyester polyether glycol that hydroxyl value is 200-500mgKOH/g, flow is 0-30pph;
Polyethers D, the polyether glycol that the sucrose that hydroxyl value is 200-500mgKOH/g or sorbyl alcohol are initial, flow is 5-15pph;
Polyethers E, the quadrol polyethers that hydroxyl value is 450-800mgKOH/g, flow is 0-15pph;
Polyethers F, the initial polyether glycol of glycerine that hydroxyl value is 160-240mgKOH/g, flow is 0-15pph.
3. roof of the vehicle light polyurethane foam as claimed in claim 1, is characterized in that: described active catalyst is the one in DMEA, Jeffcat ZF10, ZR50, Jeffcat DFA or Dabco NE300; Described low volatility catalyzer is T10, T9 or T12; Described oxidation inhibitor is PUR68.
4. the preparation method of roof of the vehicle use light polyurethane foam described in claim 1, is characterized in that step is as follows:
(1) preparation of polyethers material: polyether glycol is sent in material storing tank separately, then made the temperature of material be controlled at 20-30 DEG C by the heating/cooling system of system material, material is in tank more than standing 48h;
(2) preparation of isocyanic ester: by B material, the mixture that pure MDI or polymeric MDI and MDI mass ratio are 50 ~ 90:10 ~ 50, squeezes into another and produce batch can, keeps feed temperature to maintain 20-30 DEG C; Make equally material in tank, leave standstill 48h;
(3) preparation of unclassified stores: by silicone oil 0.5-2 part, water 3.5-5.5 part, active catalyst 0.2-1.0 part, low volatility catalyzer 0.01-0.2 part, oxidation inhibitor 0.1-1.0 part adds to produces required amount, stand-by;
(4) tinuous production foaming: under the control of computer, according to the formula rate of setting, use the metering of high-low pressure volume pump to be transported to mixing head of foaming machine above-mentioned raw materials, system foaming under high-speed stirring; The ratio of the hydroxyl equivalent in the B material wherein mixing in the relative A material of the equivalent of isocyanic ester material is 1-1.25; The stirring velocity that feed liquid enters after mixing head is controlled at 2000-5000rpm/min, and line speed is 3-8m/min;
By adjusting preposition lifter plate control foaming quality and all whole degree of bubble piece; Foam is produced continuously and is started to carry out cutting on line the online product width of adjusting according to size afterwards;
(5) slaking: the bubble piece after the cutting of step (4) gained, through 48-72h slaking, is obtained to product roof of the vehicle light polyurethane foam.
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| CN109796570A (en) * | 2019-01-15 | 2019-05-24 | 烟台正海合泰科技股份有限公司 | A kind of dedicated high-elongation polyurethane semihard foam plate of ceiling with wet method |
| CN109880059A (en) * | 2019-03-05 | 2019-06-14 | 浙江德清昂沃泡沫塑料有限公司 | A kind of preparation method of polyurethane sponge |
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| CN113619141A (en) * | 2021-08-02 | 2021-11-09 | 苏州库凌科高分子新材料有限公司 | Process for manufacturing automobile ceiling foaming material by water-based wet method |
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