CN107365409A - A kind of engine bonnet and preparation method thereof - Google Patents

A kind of engine bonnet and preparation method thereof Download PDF

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Publication number
CN107365409A
CN107365409A CN201610316076.4A CN201610316076A CN107365409A CN 107365409 A CN107365409 A CN 107365409A CN 201610316076 A CN201610316076 A CN 201610316076A CN 107365409 A CN107365409 A CN 107365409A
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China
Prior art keywords
polyalcohol
isocyanates
cortex
functionality
degree
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CN201610316076.4A
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Chinese (zh)
Inventor
史春朋
郁振峰
程俊杰
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SHANGHAI FEILI GLOBAL AUTOMOTIVE COMPONENTS Co Ltd
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SHANGHAI FEILI GLOBAL AUTOMOTIVE COMPONENTS Co Ltd
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Priority to CN201610316076.4A priority Critical patent/CN107365409A/en
Publication of CN107365409A publication Critical patent/CN107365409A/en
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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
    • B29C44/04—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles consisting of at least two parts of chemically or physically different materials, e.g. having different densities
    • B29C44/06—Making multilayered articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
    • B29C44/12—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
    • B62D25/08—Front or rear portions
    • B62D25/10—Bonnets or lids, e.g. for trucks, tractors, busses, work vehicles
    • B62D25/105—Bonnets or lids, e.g. for trucks, tractors, busses, work vehicles for motor cars
    • 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
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    • 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
    • C08G18/3225—Polyamines
    • C08G18/3237—Polyamines aromatic
    • C08G18/324—Polyamines aromatic containing only one aromatic ring
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    • 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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    • 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
    • C08G18/4812—Mixtures of polyetherdiols with polyetherpolyols having at least three hydroxy groups
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    • 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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    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
    • C08G18/66—Compounds of groups C08G18/42, C08G18/48, or C08G18/52
    • C08G18/6666—Compounds of group C08G18/48 or C08G18/52
    • C08G18/667—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38
    • C08G18/6674—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/3203
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    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
    • C08G18/66—Compounds of groups C08G18/42, C08G18/48, or C08G18/52
    • C08G18/6666—Compounds of group C08G18/48 or C08G18/52
    • C08G18/667—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38
    • C08G18/6681—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/32 or C08G18/3271 and/or polyamines of C08G18/38
    • C08G18/6685—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/32 or C08G18/3271 and/or polyamines of C08G18/38 with compounds of group C08G18/3225 or polyamines of C08G18/38
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    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
    • C08G18/66—Compounds of groups C08G18/42, C08G18/48, or C08G18/52
    • C08G18/6666—Compounds of group C08G18/48 or C08G18/52
    • C08G18/667—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38
    • C08G18/6681—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/32 or C08G18/3271 and/or polyamines of C08G18/38
    • C08G18/6688—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/32 or C08G18/3271 and/or polyamines of C08G18/38 with compounds of group C08G18/3271
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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
    • C08G18/70—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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    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
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    • 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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    • C08G2110/00—Foam properties
    • C08G2110/0083—Foam properties prepared using water as the sole blowing agent

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  • Combustion & Propulsion (AREA)
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Abstract

The invention provides a kind of engine bonnet and preparation method thereof；The engine bonnet includes being used for the froth bed at least partly covering the engine surface of vehicle and the cortex at least partly covering froth bed, and preparation method includes：Cortex generating agent is sprayed to form cortex in the inner surface of lower mould, is poured into a mould froth bed generating agent in the inner surface of cortex and is closed upper die and lower die to form froth bed, opens upper die and lower die, obtain engine bonnet；In the preparation method of the engine bonnet of the present invention, cortex is formed at the inner surface of lower mould by high pressure spray coating, successively sprayed because high pressure spray coating can be realized, the inner surface of lower mould can be completely covered, so the inner surface of cortex and lower mould has good compatible degree, the generation for the defects of efficiently avoid trachoma or the dark bubble that the outer surface of the engine bonnet of prior art is presented, the exposed surface of cortex is set to obtain good outward appearance, the vision requirement of user is disclosure satisfy that, while sound-absorbing effect can be also provided.

Description

A kind of engine bonnet and preparation method thereof
Technical field
The invention belongs to engine bonnet field of material technology, is related to a kind of engine bonnet and preparation method thereof.
Background technology
Engine bonnet is a kind of to cover auto parts machinery on an engine in a vehicle, its face needs contacted with engine With preferable sound absorption properties, so as to prevent that noise is diffused into driving cabin caused by engine；Its face needs not contacted with engine With good outward appearance, to meet that the outward appearance of user is experienced.
The manufacturing process of current engine bonnet is divided to two kinds, and one kind is using hard PP or PA injection duricrust, back side patch Sound-absorbing material is covered, obtains hard engine bonnet；Another is soft engine bonnet, and it is molded poly- ammonia by disposal pouring Ester skinned foam is made.Although soft engine bonnet has necessarily after pedestrian is collided made of polyurethane skinned foam Crusherbull zone effect, however, during cast, because the soft engine bonnet of lightweight demand easily produces trachoma or dark The defects of bubble, make the lumber recovery of product poor, influence the outward appearance impression of user；In addition, the engine bonnet back side can be corresponding Relatively thin cortex is produced, causes sound-absorbing effect bad.
The content of the invention
In order to solve the above problems, of the invention first purpose, which is to provide, a kind of has preferable outward appearance and preferably The engine bonnet of sound absorption properties.
It is another object of the present invention to provide a kind of preparation method of above-mentioned engine bonnet.
To reach above-mentioned purpose, solution of the invention is：
<Engine bonnet>
A kind of engine bonnet, it includes：Froth bed and at least for the engine surface that at least partly covers vehicle Part covers the cortex of froth bed.
[cortex]
Above-mentioned cortex includes the component with following parts by weight：
(the first polyether polyatomic alcohol component)
The first above-mentioned polyether polyatomic alcohol component includes：60-80wt% polyalcohol A, 10-20wt% polyalcohol B and 10-20wt% polyalcohol C.
Wherein, polyalcohol A is polyethylene glycol oxide propylene oxide polyol, and the content of its ethylene oxide is 10-20wt%, official Energy degree is 3, hydroxyl value 33-37mgKOH/g.
Polyalcohol B is the polyethylene glycol oxide propylene oxide polyol of styrene-acrylonitrile graft, styrene-acrylonitrile Content is 40-45wt%, degree of functionality 3, hydroxyl value 19-23mgKOH/g.
Polyalcohol C is polyoxypropylene polyol, and degree of functionality is 2, and hydroxyl value is 54.5-57.5mgKOH/g.
(the first isocyanate component)
First isocyanate component includes：20-50wt% isocyanates A and 50-80wt% isocyanates B.
Isocyanates A is poly methylene poly phenyl poly isocyanate, degree of functionality 2.6-2.7, the content of NCO For 30.2-32%.
Isocyanates B be Carbodiimide-Modified methyl diphenylene diisocyanate, degree of functionality 2.15-2.2, isocyanide The content of perester radical is 28-31%.
(chain extender)
Chain extender is any one or a few in ethylene glycol, BDO, diethanol amine and triethanolamine.
(crosslinking agent)
Crosslinking agent is one or both of methylene-bis-o-chloroaniline and diethyl toluene diamine.
(catalyst)
Catalyst is triethylene diamine, N, appointing in N- dimethyl cyclohexyl amines, stannous octoate and dibutyl tin laurate Meaning is one or more of.
(mill base)
Mill base be that carbon black, iron oxide red, cadmium oxide be green and titan yellow in any one or a few.
[froth bed]
Above-mentioned froth bed includes the component with following parts by weight：
(the second polyether polyatomic alcohol component)
The second above-mentioned polyether polyatomic alcohol component includes：70-90wt% polyalcohol A' and 10-30wt% polyalcohol B'。
Polyalcohol A' is polyethylene glycol oxide propylene oxide polyol, and the content of its ethylene oxide is 10-20wt%, degree of functionality For 3, hydroxyl value 33-37mgKOH/g.
Polyalcohol B' is the polyethylene glycol oxide propylene oxide polyol of styrene-acrylonitrile graft, styrene-acrylonitrile Content is 40-45wt%, degree of functionality 3, hydroxyl value 19-23mgKOH/g.
(the second isocyanate component)
Second isocyanate component includes：10-40wt% isocyanates A' and 60-90wt% isocyanates B'.
Isocyanates A' is poly methylene poly phenyl poly isocyanate, degree of functionality 2.6-2.7, the content of NCO For 30.2-32%.
Isocyanates B' is the methyl diphenylene diisocyanate of Carbodiimide-Modified, and degree of functionality 2.15-2.2 is different The content of cyanic acid ester group is 28-31%.
(chain extender)
Chain extender is any one or a few in ethylene glycol, BDO, diethanol amine and triethanolamine.
(catalyst)
Catalyst is triethylene diamine, N, appointing in N- dimethyl cyclohexyl amines, stannous octoate and dibutyl tin laurate Meaning is one or more of.
(foaming agent)
Foaming agent is water.
(foam stabiliser)
Foam stabiliser is organic silicon stabilizer.
(mill base)
Mill base be that carbon black, iron oxide red, cadmium oxide be green and titan yellow in any one or a few.
<The preparation method of engine bonnet>
A kind of preparation method of engine bonnet, it comprises the following steps：
(1), cortex generating agent is sprayed to form cortex in the inner surface of lower mould；
(2), the inner surface in cortex pours into a mould froth bed generating agent and closes upper die and lower die to form froth bed；
(3) upper die and lower die, are opened, obtain engine bonnet.
[cortex generating agent]
The raw materials for production of cortex generating agent include the component with following parts by weight：
[forming method of cortex]
Cortex is made up using above-mentioned cortex generating agent of raw materials for production, and its forming method comprises the following steps：
A-1. 100 part of first polyether polyatomic alcohol component, 4-10 parts chain extender, 0.5-2 parts catalyst, 0.5-1.5 parts are handed over Join agent and the mixing of 1-3 parts mill base, obtain the first mixture；
A-2., first mixture and the isocyanate component of 30-60 parts first are added to the storing of high pressure painting equipment together In room, the temperature for maintaining storage compartment is 22-26 DEG C, and the temperature for spraying pipeline is 50-80 DEG C, and is by the temperature adjustment of lower mould 50‐80℃；
A-3. after temperature stabilization, with 90-150Bar pressure by the cortex generating agent in storage compartment along certain order Spray to the inner surface of lower mould；
A-4. cortex is produced after the solidification of cortex generating agent.
Wherein, in step (a-1), the first polyether polyatomic alcohol component includes：60-80wt% polyalcohol A, 10- 20wt% polyalcohol B and 10-20wt% polyalcohol C.
Polyalcohol A is polyethylene glycol oxide propylene oxide polyol, and the content of its ethylene oxide is 10-20wt%, degree of functionality For 3, hydroxyl value 33-37mgKOH/g.
Polyalcohol B is the polyethylene glycol oxide propylene oxide polyol of styrene-acrylonitrile graft, styrene-acrylonitrile Content is 40-45wt%, degree of functionality 3, hydroxyl value 19-23mgKOH/g.
Polyalcohol C is polyoxypropylene polyol, and degree of functionality is 2, and hydroxyl value is 54.5-57.5mgKOH/g.
In step (a-2), the first isocyanate component includes：20-50wt% isocyanates A's and 50-80wt% Isocyanates B.
Isocyanates A is poly methylene poly phenyl poly isocyanate, degree of functionality 2.6-2.7, the content of NCO For 30.2-32%.
Isocyanates B be Carbodiimide-Modified methyl diphenylene diisocyanate, degree of functionality 2.15-2.2, isocyanide The content of perester radical is 28-31%.
In step (a-1), chain extender is any one in ethylene glycol, BDO, diethanol amine and triethanolamine Kind is several.
In step (a-1), crosslinking agent be methylene-bis-o-chloroaniline and diethyl toluene diamine any one or it is several Kind.
In step (a-1), catalyst is triethylene diamine, N, N- dimethyl cyclohexyl amines, stannous octoate and tin dilaurate Any one or a few in dibutyl tin.
In step (a-1), mill base be that carbon black, iron oxide red, cadmium oxide be green and titan yellow in any one or a few.
[froth bed generating agent]
The raw materials for production of above-mentioned froth bed generating agent include the component with following parts by weight：
[forming method of froth bed]
Froth bed is made up using above-mentioned froth bed generating agent of raw materials for production, and its forming method comprises the following steps：
B-1. 100 part of second polyether polyatomic alcohol component, 0.5-2 parts chain extender, 0.3-1.5 parts catalyst, 0.5-3 parts are sent out Infusion, 0.2-1 parts foam stabiliser and the mixing of 1-2 parts mill base, obtain the second mixture；
B-2. the second mixture and the isocyanate component of 40-60 parts second are added in the foam chamber of foaming machine together, The temperature for maintaining the foam chamber is 22-26 DEG C, and cast pipe temperature is 22-26 DEG C, and is 50-80 by the temperature adjustment of upper mould ℃；
A-3. after temperature stabilization, the froth bed generating agent in foam chamber is cast in by cortex with 90-150Bar pressure Inner surface；
A-4. upper die and lower die are closed, froth bed is produced after the solidification of froth bed generating agent.
Wherein, in step (b-1), the second polyether polyatomic alcohol component includes：70-90wt% polyalcohol A' and 10- 30wt% polyalcohol B'.
Polyalcohol A' is polyethylene glycol oxide propylene oxide polyol, and the content of its ethylene oxide is 10-20wt%, degree of functionality For 3, hydroxyl value 33-37mgKOH/g.
Polyalcohol B' be styrene-acrylonitrile graft polyoxygenated oxygen ethylene propylene polyalcohol, styrene-acrylonitrile Content be 40-45wt%, degree of functionality 3, hydroxyl value 19-23mgKOH/g.
In step (b-2), the second isocyanate component includes：10-40wt% isocyanates A''s and 60-90wt% Isocyanates B'.
Isocyanates A' is poly methylene poly phenyl poly isocyanate, degree of functionality 2.6-2.7, the content of NCO For 30.2--32%.
Isocyanates B' is the methyl diphenylene diisocyanate of Carbodiimide-Modified, and degree of functionality 2.15-2.2 is different The content of cyanic acid ester group is 28-31%.
In step (b-1), chain extender is any one in ethylene glycol, BDO, diethanol amine and triethanolamine Kind is several.
In step (b-1), catalyst is triethylene diamine, N, N- dimethyl cyclohexyl amines, stannous octoate and tin dilaurate Any one or a few in dibutyl tin.
In step (b-1), foaming agent is water.
In step (b-1), foam stabiliser is organic silicon stabilizer.
In step (b-1), mill base be that carbon black, iron oxide red, cadmium oxide be green and titan yellow in any one or a few.
Due to using such scheme, the beneficial effects of the invention are as follows：
First, engine bonnet of the invention includes two layers, and the froth bed and covering for respectively covering engine surface should The cortex of froth bed.Froth bed contains abundant foam, can preferably absorb noise caused by engine；The exposed surface of cortex With good outward appearance, the vision requirement of user is disclosure satisfy that, meanwhile, cortex can reflect the noise for coming from engine Froth bed is returned, so as to extend residence time of the noise in froth bed, more preferable erasure effect is played, is advantageous to obtain driver's cabin Obtain preferably Jing Yin.
Secondly, in the preparation method of the engine bonnet of the present invention, froth bed and cortex using mould (including upper mould and Lower mould) it is molded respectively, and disposal pouring is molded not such as prior art, therefore, the thickness of froth bed and cortex can It is controlled with the different type according to engine, expands the scope of application of the engine bonnet of gained.
In addition, in the preparation method of the engine bonnet of the present invention, cortex is formed at lower mould by high pressure spray coating Inner surface.Successively sprayed because high pressure spray coating can be realized, the inner surface of lower mould can be completely covered, so cortex and lower mould Inner surface there is good compatible degree, efficiently avoid the trachoma that the outer surface of the engine bonnet of prior art is presented Or the generation of dark the defects of steeping, the exposed surface of cortex is obtained good outward appearance, disclosure satisfy that the vision requirement of user.
Embodiment
The invention provides a kind of engine bonnet and preparation method thereof.
<Engine bonnet>
A kind of engine bonnet, it includes froth bed and cortex.Froth bed is used to all cover or part covers vehicle Engine surface, cortex is used to all cover or part covering froth bed.
[cortex]
Cortex includes following components, and the parts by weight of each component are as shown in table 1 below：
The constituent content table of the cortex of table 1
The content of above-mentioned each component is on the basis of the parts by weight of the first polyether polyatomic alcohol component, for example, chain extender is 4-10 parts are meant that the weight of chain extender accounts for the 4-10% of the weight of the first polyether polyatomic alcohol component, the first isocyanates group Point, the content of catalyst and mill base can make identical understanding.
Wherein, the parts by weight of the first isocyanate component can also be preferably 40-50 parts.The parts by weight of chain extender can be with Preferably 6-8 parts.The parts by weight of catalyst can also be preferably 0.8-1.3 parts.The parts by weight of mill base can also be preferably 1.5- 2.5 part.
(the first polyether polyatomic alcohol component)
First polyether polyatomic alcohol component can include：60-80wt% polyalcohol A, 10-20wt% polyalcohol B and 10- 20wt% polyalcohol C.Polyalcohol A is that 60-80wt% is meant that polyalcohol A weight accounts for the first polyether polyatomic alcohol component The percentage of gross weight is that 60-80%, polyalcohol B and polyalcohol C content make identical understanding.
First polyether polyatomic alcohol component can also include：70wt% polyalcohol A, 15wt% polyalcohol B and 15wt% Polyalcohol C.
Polyalcohol A is polyethylene glycol oxide propylene oxide polyol, and the content of its ethylene oxide can be 10-20wt%, official Energy degree can be 3, and hydroxyl value can be 33-37mgKOH/g.Because initiation material is single raw material, degree of functionality is fixed 's.
Polyalcohol B is the polyethylene glycol oxide propylene oxide polyol of styrene-acrylonitrile graft, and styrene-acrylonitrile (connects Branch thing) content can be 40-45wt%, degree of functionality can be 3, and hydroxyl value can be 19-23mgKOH/g.
Polyalcohol C is polyoxypropylene polyol, and degree of functionality can be 2, and hydroxyl value can be 54.5-57.5mgKOH/g.
(the first isocyanate component)
First isocyanate component can include：20-50wt% isocyanates A and 50-80wt% isocyanates B. Isocyanates A is that 20-50wt% is meant that isocyanates A weight accounts for the percentage of the gross weight of the first isocyanate component For 20-50%.Isocyanates B content makees identical understanding.
First isocyanate component can also include：20-40wt% isocyanates A and 60-80wt% isocyanates B。
Isocyanates A is poly methylene poly phenyl poly isocyanate, and degree of functionality can be 2.6-2.7, NCO Content can be 30.2-32%.The isocyanates A trade mark can be PM-200, M20S or 44V20.
Isocyanates B be Carbodiimide-Modified methyl diphenylene diisocyanate, degree of functionality 2.15-2.2, isocyanide The content of perester radical is 28-31%.The isocyanates B trade mark can be MM103C, 100LL or millionateMX.Hexichol first Dicyclohexylmethane diisocyanate is solid at normal temperatures, and modified is liquid at normal temperatures, easy to operation, and can increase material Hydrolysis ability.
(chain extender)
Chain extender can be any one or a few in ethylene glycol, BDO, diethanol amine and triethanolamine.Expand Chain agent can increase the physical property of product, make its surface effect preferable.
(crosslinking agent)
Crosslinking agent is any one or two kinds of methylene-bis-o-chloroaniline and diethyl toluene diamine, the effect of crosslinking agent It is to ensure that raw material reduces flowing after being sprayed on mould, so as to ensure the uniformity of the thickness of the cortex after spraying.
(catalyst)
Catalyst can be triethylene diamine, N, in N- dimethyl cyclohexyl amines, stannous octoate and dibutyl tin laurate Any one or a few.Catalyst can increase reaction rate, improve production efficiency.
(mill base)
Mill base can be that carbon black, iron oxide red, cadmium oxide be green and titan yellow in any one or a few.Material is at one section Between after be easy to turn yellow, increase mill base can cover discoloration well.
[froth bed]
Froth bed includes following components, and the parts by weight of each component are as shown in table 2 below：
The constituent content table of the froth bed of table 2
The content of above-mentioned each component is on the basis of the parts by weight of the second polyether polyatomic alcohol component, for example, chain extender is 0.5-2 parts are meant that the weight of chain extender accounts for the 0.5-2% of the weight of the second polyether polyatomic alcohol component, the second isocyanates group Point, the content of catalyst, foaming agent, foam stabiliser and mill base can make identical understanding.
Wherein, the parts by weight of the second isocyanate component can also be preferably 40-45 parts.The parts by weight of chain extender can be with Preferably 0.5-1.5 parts.The parts by weight of foaming agent can also be preferably 1-3 parts.The parts by weight of foam stabiliser can also be preferred For 0.4-0.8 parts.The parts by weight of mill base can also be preferably 1.5-2 parts.
The content of each component of froth bed and the respective components of cortex slightly has difference, and its reason is：Cortex is not foaming material Material, froth bed need to be foamed using foaming agent and associated catalysts.
(the second polyether polyatomic alcohol component)
Second polyether polyatomic alcohol component can include：70-90wt% polyalcohol A' and 10-30wt% polyalcohol B'. Polyalcohol A' is that 70-90wt% is meant that polyalcohol A' weight accounts for the percentage of the gross weight of the second polyether polyatomic alcohol component For 70-90%, polyalcohol B' content makees identical understanding.
Second polyether polyatomic alcohol component can also include：80wt% polyalcohol A' and 20wt% polyalcohol B'.
Polyalcohol A' is polyethylene glycol oxide propylene oxide polyol, and the content of its ethylene oxide can be 10-20wt%, official Energy degree can be 3, and hydroxyl value can be 33-37mgKOH/g.
Polyalcohol B' be styrene-acrylonitrile graft polyethylene glycol oxide propylene oxide polyol, styrene-acrylonitrile The content of (graft) can be 40-45wt%, and degree of functionality can be 3, and hydroxyl value can be 19-23mgKOH/g.
(the second isocyanate component)
Second isocyanate component can include：10-40wt% isocyanates A' and 60-90wt% isocyanates B'.Isocyanates A' is that 10-40wt% is meant that isocyanates A' weight accounts for the gross weight of the second isocyanate component Percentage is 10-40%.Isocyanates B' content makees identical understanding.
Second isocyanate component can also include：30wt% isocyanates A' and 70wt% isocyanates B'.
Isocyanates A' is poly methylene poly phenyl poly isocyanate, and degree of functionality can be 2.6-2.7, NCO Content can be 30.2-32.%.The isocyanates A' trade mark can be PM-200, M20S or 44V20.
Isocyanates B' is the methyl diphenylene diisocyanate of Carbodiimide-Modified, and degree of functionality can be 2.15- 2.2, the content of NCO can be 28-31%.The isocyanates B' trade mark can be MM103C, 100LL or millionateMX。
(chain extender)
Chain extender can be any one or a few in ethylene glycol, BDO, diethanol amine and triethanolamine.
(catalyst)
Catalyst can be triethylene diamine, N, in N- dimethyl cyclohexyl amines, stannous octoate and dibutyl tin laurate Any one or a few.
(foaming agent)
Foaming agent can be CBA or physical blowing agent.The principle of CBA is anti-by the way that chemistry occurs Should, make some foamable component release gases in material system, so as to produce foamed phenomenon.Currently preferred chemical blowing Agent is water, and water can react generation carbon dioxide with isocyanates, make isocyanates and polyethers in the presence of catalyst Polyalcohol is sufficiently mixed generation foam.
(foam stabiliser)
Foam stabiliser can be organic silicon stabilizer.The trade mark of the organic silicon stabilizer can be TegostabB8715, B8719, B8729 or B8734.Foam stabiliser can improve emulsifying raw material ability, stable foam structure.
(mill base)
Mill base be that carbon black, iron oxide red, cadmium oxide be green and titan yellow in any one or a few.
<The preparation method of engine bonnet>
A kind of preparation method of engine bonnet, it includes：Following steps：
(1), cortex generating agent is sprayed to form cortex in the inner surface of lower mould；
(2), cortex surface casting froth bed generating agent and close upper die and lower die to form froth bed；
(3) upper die and lower die, are opened, obtain engine bonnet.
[cortex generating agent]
The raw materials for production of above-mentioned cortex generating agent include following components and the parts by weight of each component are as follows：
Wherein, the first polyether polyatomic alcohol component includes：60-80wt% polyalcohol A, 10-20wt% polyalcohol B and 10-20% polyalcohol C.Polyalcohol A is polyethylene glycol oxide propylene oxide polyol, and the content of its ethylene oxide can be 10- 20wt%, degree of functionality can be 3, and hydroxyl value can be 33-37mgKOH/g.Polyalcohol B is the polyoxy of styrene-acrylonitrile graft Change ethylene propylene polyalcohol, the content of styrene-acrylonitrile can be 40-45wt%, and degree of functionality can be 3, and hydroxyl value can Think 19-23mgKOH/g.Polyalcohol C is polyoxypropylene polyol, and degree of functionality can be 2, and hydroxyl value can be 54.5- 57.5mgKOH/g。
First isocyanate component includes：20-50wt% isocyanates A and 50-80wt% isocyanates B.Isocyanide Acid esters A is poly methylene poly phenyl poly isocyanate, and degree of functionality can be 2.6-2.7, and the content of NCO can be 30.2-32%.Isocyanates B is the methyl diphenylene diisocyanate of Carbodiimide-Modified, and degree of functionality can be 2.15- 2.2, the content of NCO can be 28-31%.
Chain extender can be any one or a few in ethylene glycol, BDO, diethanol amine and triethanolamine.
Crosslinking agent is methylene-bis-o-chloroaniline, diethyl toluene diamine any one or a few
Catalyst can be triethylene diamine, N, in N- dimethyl cyclohexyl amines, stannous octoate and dibutyl tin laurate Any one or a few.
Mill base can be that carbon black, iron oxide red, cadmium oxide be green and titan yellow in any one or a few.
[forming method of cortex]
The forming method of above-mentioned cortex comprises the following steps：
A-1. 100 part of first polyether polyatomic alcohol component, 4-10 parts chain extender, 0.5-1.5 parts crosslinking agent, 0.5-2 parts are urged Agent and the mixing of 1-3 parts mill base, obtain the first mixture；
A-2., first mixture and the isocyanate component of 30-60 parts first are added to the storing of high pressure painting equipment together In room, the temperature for maintaining storage compartment is 22-26 DEG C, and the temperature for spraying pipeline is 50-80 DEG C, and is by the temperature adjustment of lower mould 50‐80℃；
A-3. after temperature stabilization, with 90-150Bar pressure by the cortex generating agent in storage compartment along certain order Spray to the inner surface of lower mould；
A-4. cortex is produced after the solidification of cortex generating agent.
In step a-3, the thickness and the uniformity of spraying can be adjusted as needed.If desired thicker spray is obtained Coating, then it can increase the time of spraying.
[froth bed generating agent]
The raw materials for production of above-mentioned froth bed generating agent include the component with following parts by weight：
Wherein, the second polyether polyatomic alcohol component includes：70-90wt% polyalcohol A' and 10-30wt% polyalcohol B'. Polyalcohol A' is polyethylene glycol oxide propylene oxide polyol, and the content of its ethylene oxide can be 10-20wt%, and degree of functionality can be with For 3, hydroxyl value can be 33-37mgKOH/g.Polyalcohol B' is that the polyethylene glycol oxide propylene oxide of styrene-acrylonitrile graft is more First alcohol, the content of styrene-acrylonitrile can be 40-45wt%, and degree of functionality can be 3, and hydroxyl value can be 19-23mgKOH/g.
Second isocyanate component includes：10-40wt% isocyanates A' and 60-90wt% isocyanates B'.It is different Cyanate A' is poly methylene poly phenyl poly isocyanate, and degree of functionality can be 2.6-2.7, and the content of NCO can be 30.3-32%.Isocyanates B' is the methyl diphenylene diisocyanate of Carbodiimide-Modified, and degree of functionality can be 2.15- 2.2, the content of NCO can be 28-31%.
Chain extender can be any one or a few in ethylene glycol, BDO, diethanol amine and triethanolamine.
Catalyst can be triethylene diamine, N, in N- dimethyl cyclohexyl amines, stannous octoate and dibutyl tin laurate Any one or a few.
Foaming agent can be water.
Foam stabiliser can be organic silicon stabilizer.
Mill base can be that carbon black, iron oxide red, cadmium oxide be green and titan yellow in any one or a few.
[forming method of froth bed]
The forming method of above-mentioned froth bed comprises the following steps：
B-1. 100 part of second polyether polyatomic alcohol component, 0.5-2 parts chain extender, 0.3-1.5 parts catalyst, 0.5-3 parts are sent out Infusion, 0.2-1 parts foam stabiliser and the mixing of 1-2 parts mill base, obtain the second mixture；
B-2. the second mixture and the isocyanate component of 40-60 parts second are added in the foam chamber of foaming machine together, The temperature for maintaining the foam chamber is 22-26 DEG C, and the temperature for pouring into a mould pipeline is 22-26 DEG C, and is 50-80 by the temperature adjustment of upper mould ℃；
A-3. after temperature stabilization, the froth bed generating agent in foam chamber is cast in by cortex with 90-150Bar pressure Inner surface；
A-4. upper die and lower die are closed, froth bed is produced after the solidification of froth bed generating agent.
The present invention is further illustrated with reference to embodiments.
Embodiment one
A kind of engine bonnet is present embodiments provided, it includes froth bed and cortex.
[cortex]
Cortex includes following components, and the parts by weight of each component are as follows：
(the first polyether polyatomic alcohol component)
First polyether polyatomic alcohol component includes：70wt% polyalcohol A, 15wt% polyalcohol B's and 15wt% is polynary Alcohol C.
Polyalcohol A is polyethylene glycol oxide propylene oxide polyol, and the content of its ethylene oxide is 10-20wt%, degree of functionality For 3, hydroxyl value 33-37mgKOH/g, trade mark GEP330N.
Polyalcohol B is the polyethylene glycol oxide propylene oxide polyol of styrene-acrylonitrile graft, and styrene-acrylonitrile (connects Branch thing) content can be 40-45wt%, degree of functionality 3, hydroxyl value 19-23mgKOH/g, the trade mark is GPOP H45.
Polyalcohol C is polyoxypropylene polyol, and degree of functionality can be 2, and hydroxyl value is 54.5-57.5mgKOH/g, and the trade mark is GE‐220。
(the first isocyanate component)
First isocyanate component includes：20-40wt% isocyanates A and 60-80wt% isocyanates B.
Isocyanates A is poly methylene poly phenyl poly isocyanate, degree of functionality 2.6-2.7, the content of NCO For 30.2-32%.The isocyanates A trade mark can be PM-200.
Isocyanates B be Carbodiimide-Modified methyl diphenylene diisocyanate, degree of functionality 2.15-2.2, isocyanide The content of perester radical is 28-31%.The isocyanates B trade mark can be MM103C.
(chain extender)
Chain extender is ethylene glycol.
(crosslinking agent)
Crosslinking agent is diethyl toluene diamine
(catalyst)
Catalyst is triethylene diamine.
(mill base)
Mill base is carbon black.
[froth bed]
Froth bed includes following components, and the parts by weight of each component are as follows：
(the second polyether polyatomic alcohol component)
Second polyether polyatomic alcohol component includes：80wt% polyalcohol A' and 20wt% polyalcohol B'.
Polyalcohol A' is polyethylene glycol oxide propylene oxide polyol, and the content of its ethylene oxide is 10-20wt%, degree of functionality Can be 3, hydroxyl value can be 33-37mgKOH/g.
Polyalcohol B' be styrene-acrylonitrile graft polyethylene glycol oxide propylene oxide polyol, styrene-acrylonitrile The content of (graft) is 40-45wt%, and degree of functionality can be 3, hydroxyl value 19-23mgKOH/g.
(the second isocyanate component)
Second isocyanate component includes：30wt% isocyanates A' and 70wt% isocyanates B'.
Isocyanates A' is poly methylene poly phenyl poly isocyanate, degree of functionality 2.6-2.7, the content of NCO For 30.2-32%.The isocyanates A' trade mark can be PM-200.
Isocyanates B' is the methyl diphenylene diisocyanate of Carbodiimide-Modified, and degree of functionality 2.15-2.2 is different The content of cyanic acid ester group is 28-31%.The isocyanates B' trade mark can be MM103C.
(chain extender)
Chain extender is diethanol amine.
(catalyst)
Catalyst is triethylene diamine.
(foaming agent)
Foaming agent is water.
(foam stabiliser)
Foam stabiliser is organic silicon stabilizer.The trade mark of the organic silicon stabilizer can be tegostabB8715.
(mill base)
Mill base is carbon black.
The present embodiment additionally provides a kind of preparation method of engine bonnet, and it includes：Following steps：
(1), cortex generating agent is sprayed to form cortex in the inner surface of lower mould；
(2), cortex surface casting froth bed generating agent and close upper die and lower die to form froth bed；
(3) upper die and lower die, are opened, obtain engine bonnet.
[forming method of cortex]
The forming method of above-mentioned cortex comprises the following steps：
A-1. by 100 part of first polyether polyatomic alcohol component, 8 parts of chain extenders, 1 part of crosslinking agent, 1.2 parts of catalyst and 2 parts of colors Slurry mixing, obtains the first mixture；
A-2., first mixture and 48 part of first isocyanate component are added to the storage compartment of high pressure painting equipment together In, the temperature for maintaining storage compartment is 23 DEG C, and the temperature for spraying pipeline is 72 DEG C, and is 55 DEG C by the temperature adjustment of upper mould；
A-3., cortex generating agent in storage compartment is sprayed to the interior table of lower mould with 110Bar pressure along certain order Face；
A-4. cortex is produced after the solidification of cortex generating agent.
[forming method of froth bed]
The forming method of above-mentioned froth bed comprises the following steps：
B-1. by 100 part of second polyether polyatomic alcohol component, 1.2 parts of chain extenders, 0.8 part of catalyst, 2.5 parts of foaming agents, 0.5 Part foam stabiliser and 1.8 parts of mill bases mixing, obtain the second mixture；
B-2. the second mixture and 42 part of second isocyanate component are added in the foam chamber of foaming machine together, maintained The temperature of the foam chamber is 23 DEG C, and the temperature for pouring into a mould pipeline is 23 DEG C, and is 55 DEG C by the temperature adjustment of upper mould；
A-3., froth bed generating agent in foam chamber is cast in the inner surface of cortex with 110Bar pressure；
A-4. upper die and lower die are closed, froth bed is produced after the solidification of froth bed generating agent.
Embodiment two
A kind of engine bonnet is present embodiments provided, it includes froth bed and cortex.
[cortex]
Cortex includes following components, and the parts by weight of each component are as follows：
(the first polyether polyatomic alcohol component)
First polyether polyatomic alcohol component includes：70wt% polyalcohol A, 15wt% polyalcohol B's and 15wt% is polynary Alcohol C.
Polyalcohol A is polyethylene glycol oxide propylene oxide polyol, and the content of its ethylene oxide is 10-20wt%, degree of functionality For 3, hydroxyl value 33-37mgKOH/g, trade mark GEP330N.
Polyalcohol B is the polyethylene glycol oxide propylene oxide polyol of styrene-acrylonitrile graft, and styrene-acrylonitrile (connects Branch thing) content can be 40-45wt%, degree of functionality 3, hydroxyl value 19-23mgKOH/g, the trade mark is GPOP H45.
Polyalcohol C is polyoxypropylene polyol, and degree of functionality can be 2, and hydroxyl value is 54.5-57.5mgKOH/g, and the trade mark is GE‐220。
(the first isocyanate component)
First isocyanate component includes：20-40wt% isocyanates A and 60-80wt% isocyanates B.
Isocyanates A is poly methylene poly phenyl poly isocyanate, degree of functionality 2.6-2.7, the content of NCO For 30.2-32%.The isocyanates A trade mark can be PM-200.
Isocyanates B be Carbodiimide-Modified methyl diphenylene diisocyanate, degree of functionality 2.15-2.2, isocyanide The content of perester radical is 28-31%.The isocyanates B trade mark can be MM103C.
(chain extender) chain extender is ethylene glycol.
(crosslinking agent) crosslinking agent is diethyl toluene diamine
(catalyst) catalyst is triethylene diamine.
(mill base) mill base is carbon black.
[froth bed]
Froth bed includes following components, and the parts by weight of each component are as follows：
(the second polyether polyatomic alcohol component)
Second polyether polyatomic alcohol component includes：80wt% polyalcohol A' and 20wt% polyalcohol B'.
Polyalcohol A' is polyethylene glycol oxide propylene oxide polyol, and the content of its ethylene oxide is 10-20wt%, degree of functionality Can be 3, hydroxyl value can be 33-37mgKOH/g.
Polyalcohol B' be styrene-acrylonitrile graft polyethylene glycol oxide propylene oxide polyol, styrene-acrylonitrile The content of (graft) is 40-45wt%, and degree of functionality can be 3, hydroxyl value 19-23mgKOH/g.
(the second isocyanate component)
Second isocyanate component includes：30wt% isocyanates A' and 70wt% isocyanates B'.
Isocyanates A' is poly methylene poly phenyl poly isocyanate, degree of functionality 2.6-2.7, the content of NCO For 30.2-32%.The isocyanates A' trade mark can be PM-200.
Isocyanates B' is the methyl diphenylene diisocyanate of Carbodiimide-Modified, and degree of functionality 2.15-2.2 is different The content of cyanic acid ester group is 28-31%.The isocyanates B' trade mark can be MM103C.
(chain extender) chain extender is diethanol amine.
(catalyst) catalyst is triethylene diamine.
(foaming agent) foaming agent is water.
(foam stabiliser) foam stabiliser is organic silicon stabilizer.The trade mark of the organic silicon stabilizer can be tegostabB8715。
(mill base) mill base is carbon black.
The present embodiment additionally provides a kind of preparation method of engine bonnet, and it includes：Following steps：
(1), cortex generating agent is sprayed to form cortex in the inner surface of lower mould；
(2), cortex surface casting froth bed generating agent and close upper die and lower die to form froth bed；
(3) upper die and lower die, are opened, obtain engine bonnet.
[forming method of cortex]
The forming method of above-mentioned cortex comprises the following steps：
A-1. by 100 part of first polyether polyatomic alcohol component, 8 parts of chain extenders, 1.5 parts of crosslinking agents, 1.3 parts of catalyst and 2.5 Part mill base mixing, obtains the first mixture；
A-2., first mixture and 48 part of first isocyanate component are added to the storage compartment of high pressure painting equipment together In, the temperature for maintaining storage compartment is 23 DEG C, and the temperature for spraying pipeline is 72 DEG C, and is 55 DEG C by the temperature adjustment of upper mould；
A-3., cortex generating agent in storage compartment is sprayed to the interior table of lower mould with 110Bar pressure along certain order Face；
A-4. cortex is produced after the solidification of cortex generating agent.
[forming method of froth bed]
The forming method of above-mentioned froth bed comprises the following steps：
B-1. by 100 part of second polyether polyatomic alcohol component, 1.5 parts of chain extenders, 1.2 parts of catalyst, 3 parts of foaming agents, 0.8 part Foam stabiliser and 2 parts of mill base mixing, obtain the second mixture；
B-2. the second mixture and 42 part of second isocyanate component are added in the foam chamber of foaming machine together, maintained The temperature of the foam chamber is 23 DEG C, and the temperature for pouring into a mould pipeline is 23 DEG C, and is 55 DEG C by the temperature adjustment of upper mould；
A-3., froth bed generating agent in foam chamber is cast in the inner surface of cortex with 110Bar pressure；
A-4. upper die and lower die are closed, froth bed is produced after the solidification of froth bed generating agent.
The above-mentioned description to embodiment is that this hair is understood that and used for ease of those skilled in the art It is bright.Person skilled in the art obviously easily can make various modifications to these embodiments, and described herein General Principle is applied in other embodiment without by performing creative labour.Therefore, the invention is not restricted to above-described embodiment, Those skilled in the art do not depart from improvement that scope made and modification all should be in this hairs according to the announcement of the present invention Within bright protection domain.

Claims (10)

  1. A kind of 1. engine bonnet, it is characterised in that：Including：For the froth bed for the engine surface at least partly covering vehicle At least partly cover the cortex of the froth bed.
  2. 2. engine bonnet according to claim 1, it is characterised in that：The cortex includes the group with following parts by weight Point：
  3. 3. engine bonnet according to claim 2, it is characterised in that：First polyether polyatomic alcohol component includes：60‐ 80wt% polyalcohol A, 10-20wt% polyalcohol B and 10-20wt% polyalcohol C,
    Polyalcohol A is polyethylene glycol oxide propylene oxide polyol, and the content of its ethylene oxide is 10-20wt%, degree of functionality 3, Hydroxyl value is 33-37mgKOH/g,
    Polyalcohol B be styrene-acrylonitrile graft polyethylene glycol oxide propylene oxide polyol, the content of styrene-acrylonitrile For 40-45wt%, degree of functionality 3, hydroxyl value 19-23mgKOH/g,
    Polyalcohol C is polyoxypropylene polyol, and degree of functionality is 2, and hydroxyl value is 54.5-57.5mgKOH/g；And/or
    First isocyanate component includes：20-50wt% isocyanates A and 50-80wt% isocyanates B,
    Isocyanates A is poly methylene poly phenyl poly isocyanate, degree of functionality 2.6-2.7, and the content of NCO is 30.2-32%,
    Isocyanates B be Carbodiimide-Modified methyl diphenylene diisocyanate, degree of functionality 2.15-2.2, isocyanates The content of base is 28-31%；And/or
    The chain extender is any one or a few in ethylene glycol, BDO, diethanol amine and triethanolamine；And/or
    The crosslinking agent is the one or two of methylene-bis-o-chloroaniline and diethyl toluene diamine；And/or
    The catalyst is triethylene diamine, N, appointing in N- dimethyl cyclohexyl amines, stannous octoate and dibutyl tin laurate Meaning is one or more of；And/or
    The mill base be that carbon black, iron oxide red, cadmium oxide be green and titan yellow in any one or a few.
  4. 4. engine bonnet according to claim 1, it is characterised in that：The froth bed is included with following parts by weight Component：
  5. 5. engine bonnet according to claim 4, it is characterised in that：Second polyether polyatomic alcohol component includes：70‐ 90wt% polyalcohol A' and 10-30wt% polyalcohol B', polyalcohol A' are polyethylene glycol oxide propylene oxide polyol, its oxygen The content for changing ethene is 10-20wt%, degree of functionality 3, hydroxyl value 33-37mgKOH/g,
    Polyalcohol B' be styrene-acrylonitrile graft polyethylene glycol oxide propylene oxide polyol, the content of styrene-acrylonitrile For 40-45wt%, degree of functionality 3, hydroxyl value 19-23mgKOH/g,
    Second isocyanate component includes：10-40wt% isocyanates A' and 60-90wt% isocyanates B',
    Isocyanates A' is poly methylene poly phenyl poly isocyanate, degree of functionality 2.6-2.7, and the content of NCO is 30.2-32wt%,
    Isocyanates B' be Carbodiimide-Modified methyl diphenylene diisocyanate, degree of functionality 2.15-2.2, isocyanic acid The content of ester group is 28-31%；And/or；
    The chain extender is any one or a few in ethylene glycol, BDO, diethanol amine and triethanolamine；And/or
    The catalyst is triethylene diamine, N, appointing in N- dimethyl cyclohexyl amines, stannous octoate and dibutyl tin laurate Meaning is one or more of；And/or
    The foaming agent is water；And/or
    The foam stabiliser is organic silicon stabilizer；And/or
    The mill base be that carbon black, iron oxide red, cadmium oxide be green and titan yellow in any one or a few.
  6. A kind of 6. preparation method of engine bonnet as claimed in claim 1, it is characterised in that：Including：Following steps：
    (1), cortex generating agent is sprayed to form cortex in the inner surface of lower mould；
    (2), the inner surface in the cortex pours into a mould froth bed generating agent and closes the upper die and lower die to form froth bed；
    (3) the upper mould and the lower mould, are opened, obtains engine bonnet.
  7. 7. preparation method according to claim 6, it is characterised in that：The raw materials for production of the cortex generating agent include having The component of following parts by weight：
    The forming method of the cortex comprises the following steps：
    A-1. by 100 part of first polyether polyatomic alcohol component, 4-10 parts chain extender, 0.5-2 parts catalyst, 0.5-1.5 part crosslinking agents Mixed with 1-3 parts mill base, obtain the first mixture；
    A-2., first mixture and the isocyanate component of 30-60 parts first are added to the storing of high pressure painting equipment together In room, the temperature for maintaining storage compartment is 22-26 DEG C, and the temperature for spraying pipeline is 50-80 DEG C, and by the temperature adjustment of the lower mould For 50-80 DEG C；
    A-3. after temperature stabilization, with 90-150Bar pressure by the cortex generating agent in the storage compartment along certain order Spray to the inner surface of the lower mould；
    A-4. the cortex is produced after cortex generating agent solidification.
  8. 8. preparation method according to claim 7, it is characterised in that：In step (a-1), first PPG Component includes：60-80wt% polyalcohol A, 10-20wt% polyalcohol B and 10-20wt% polyalcohol C,
    Polyalcohol A is polyethylene glycol oxide propylene oxide polyol, and the content of its ethylene oxide is 10-20wt%, degree of functionality 3, Hydroxyl value is 33-37mgKOH/g,
    Polyalcohol B be styrene-acrylonitrile graft polyethylene glycol oxide propylene oxide polyol, the content of styrene-acrylonitrile For 40-45wt%, degree of functionality 3, hydroxyl value 19-23mgKOH/g,
    Polyalcohol C is polyoxypropylene polyol, and degree of functionality is 2, and hydroxyl value is 54.5-57.5mgKOH/g；And/or
    In step (a-2), first isocyanate component includes：20-50wt% isocyanates A's and 50-80wt% Isocyanates B,
    Isocyanates A is poly methylene poly phenyl poly isocyanate, degree of functionality 2.6-2.7, and the content of NCO is 30.2-32%,
    Isocyanates B be Carbodiimide-Modified methyl diphenylene diisocyanate, degree of functionality 2.15-2.2, isocyanates The content of base is 28-31%；And/or
    In step (a-1), the chain extender is any one in ethylene glycol, BDO, diethanol amine and triethanolamine Kind is several；And/or
    In step (a-1), the crosslinking agent be methylene-bis-o-chloroaniline and diethyl toluene diamine any one or two Kind；And/or
    In step (a-1), the catalyst is triethylene diamine, N, N- dimethyl cyclohexyl amines, stannous octoate and tin dilaurate Any one or a few in dibutyl tin；And/or
    In step (2), the mill base be that carbon black, iron oxide red, cadmium oxide be green and titan yellow in any one or a few.
  9. 9. preparation method according to claim 6, it is characterised in that：The raw materials for production of the froth bed generating agent include tool There is the component of following parts by weight：
    The forming method of the froth bed comprises the following steps：
    B-1. 100 part of second polyether polyatomic alcohol component, 0.5-2 parts chain extender, 0.3-1.5 parts catalyst, 0.5-3 parts are foamed Agent, 0.2-1 parts foam stabiliser and the mixing of 1-2 parts mill base, obtain the second mixture；
    B-2. second mixture and the isocyanate component of 40-60 parts second are added in the foam chamber of foaming machine together, The temperature for maintaining the foam chamber is 22-26 DEG C, and cast pipe temperature is 22-26 DEG C, and is 50-80 by the temperature adjustment of upper mould ℃；
    B-3. after temperature stabilization, the froth bed generating agent in the foam chamber is cast in 90-150Bar pressure described The inner surface of cortex；
    B-4. the upper mould and the lower mould are closed, the froth bed is produced after froth bed generating agent solidification.
  10. 10. preparation method according to claim 9, it is characterised in that：In step (b-1), second polyether polyols Alkoxide component includes：70-90wt% polyalcohol A' and 10-30wt% polyalcohol B',
    Polyalcohol A' is polyethylene glycol oxide propylene oxide polyol, and the content of its ethylene oxide is 10-20wt%, degree of functionality 3, Hydroxyl value is 33-37mgKOH/g,
    Polyalcohol B' be styrene-acrylonitrile graft polyethylene glycol oxide propylene oxide polyol, the content of styrene-acrylonitrile For 40-45wt%, degree of functionality 3, hydroxyl value 19-23mgKOH/g；And/or；
    In step (b-2), second isocyanate component includes：10-40wt% isocyanates A''s and 60-90wt% Isocyanates B',
    Isocyanates A' is poly methylene poly phenyl poly isocyanate, degree of functionality 2.6-2.7, and the content of NCO is 30.2--32wt%,
    Isocyanates B' be Carbodiimide-Modified methyl diphenylene diisocyanate, degree of functionality 2.15-2.2, isocyanic acid The content of ester group is 28-31%；And/or；
    In step (b-1), the chain extender is any one in ethylene glycol, BDO, diethanol amine and triethanolamine Kind is several；And/or
    In step (b-1), the catalyst is triethylene diamine, N, N- dimethyl cyclohexyl amines, stannous octoate and tin dilaurate Any one or a few in dibutyl tin；And/or
    In step (b-1), the foaming agent is water；And/or
    In step (b-1), the foam stabiliser is organic silicon stabilizer；And/or
    In step (b-1), the mill base be that carbon black, iron oxide red, cadmium oxide be green and titan yellow in any one or a few.
CN201610316076.4A 2016-05-12 2016-05-12 A kind of engine bonnet and preparation method thereof Pending CN107365409A (en)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02196816A (en) * 1989-01-26 1990-08-03 M D Kasei Kk Production of integral skin foam
CN2419032Y (en) * 2000-03-15 2001-02-14 李泰珍 Foamed PVC pipe with internal crew
CN103172818A (en) * 2013-03-01 2013-06-26 上海延锋江森座椅有限公司 Foaming raw material for forming interior trim part of automobile seat, preparation method and PIP (Product In Package) preparation process
CN103890061A (en) * 2011-07-13 2014-06-25 奥托·博克泡沫系统有限责任公司 Increasing the sound absorption in foam insulating materials
CN104130371A (en) * 2013-06-05 2014-11-05 郑州精益达汽车零部件有限公司 Low-smell high-rebound sponge for seats of passenger car and preparation method thereof
CN104626594A (en) * 2014-12-27 2015-05-20 长城汽车股份有限公司 Production method of thermal insulating layer of front wall of automobile
CN204622725U (en) * 2015-04-30 2015-09-09 广德天运新技术股份有限公司 A kind of automobile roof sound insulation cushion with damping and silencing

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02196816A (en) * 1989-01-26 1990-08-03 M D Kasei Kk Production of integral skin foam
CN2419032Y (en) * 2000-03-15 2001-02-14 李泰珍 Foamed PVC pipe with internal crew
CN103890061A (en) * 2011-07-13 2014-06-25 奥托·博克泡沫系统有限责任公司 Increasing the sound absorption in foam insulating materials
CN103172818A (en) * 2013-03-01 2013-06-26 上海延锋江森座椅有限公司 Foaming raw material for forming interior trim part of automobile seat, preparation method and PIP (Product In Package) preparation process
CN104130371A (en) * 2013-06-05 2014-11-05 郑州精益达汽车零部件有限公司 Low-smell high-rebound sponge for seats of passenger car and preparation method thereof
CN104626594A (en) * 2014-12-27 2015-05-20 长城汽车股份有限公司 Production method of thermal insulating layer of front wall of automobile
CN204622725U (en) * 2015-04-30 2015-09-09 广德天运新技术股份有限公司 A kind of automobile roof sound insulation cushion with damping and silencing

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