CN107216576B - Environment-friendly type height springs back PVC/NBR/BR elastic body sealing strip and preparation method thereof - Google Patents
Environment-friendly type height springs back PVC/NBR/BR elastic body sealing strip and preparation method thereof Download PDFInfo
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- CN107216576B CN107216576B CN201710596130.XA CN201710596130A CN107216576B CN 107216576 B CN107216576 B CN 107216576B CN 201710596130 A CN201710596130 A CN 201710596130A CN 107216576 B CN107216576 B CN 107216576B
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
- C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L27/04—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
- C08L27/06—Homopolymers or copolymers of vinyl chloride
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2296—Oxides; Hydroxides of metals of zinc
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/003—Additives being defined by their diameter
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/08—Polymer mixtures characterised by other features containing additives to improve the compatibility between two polymers
Abstract
The present invention relates to a kind of environment-friendly type sealing strip, in particular to a kind of environment-friendly type height rebound PVC/NBR/BR elastic body sealing strip and preparation method thereof.The sealing strip is mainly made of the following raw material: 100 parts of PVC, 10 ~ 70 parts of NBR, 10 ~ 50 parts of modified BR, 10 ~ 60 parts of polyester plasticizers, 5 ~ 20 parts of epoxidized soybean oils, 10 ~ 60 parts of superfine white carbon blacks, 10 ~ 40 parts of carbon blacks, 1 ~ 3 part of stearic acid, 2 ~ 8 parts of zinc oxide, 2 ~ 6 parts of calcium-zinc composite stabilizing agents, 1 ~ 5 part of dual-tert-butyl cumene hydroperoxide, 1 ~ 3 part of antioxidant 4010NA.Environment-friendly type height rebound PVC/NBR/BR elastic body sealing strip of the present invention has the characteristics that resilience is good, migration is low, excellent combination property, the use suitable for industries such as automobile, building, wire and cable, household electrical appliance.
Description
Technical field
The present invention relates to a kind of environment-friendly type sealing strip, in particular to a kind of environment-friendly type height rebound PVC/NBR/BR elastomer is close
Strip of paper used for sealing and preparation method thereof.
Background technique
Polyvinyl chloride (PVC) and nitrile rubber (NBR) and with existing very long phase of history, be the polymer that uses earliest simultaneously
With one of rubber-plastic elastomer kind.PVC and NBR and oil resistivity, the chemical proof, resistance to ozone that PVC is combined with elastomer
Property and NBR resistance to dissolubility and elasticity, while PVC to NBR rise reinforcing effects.If compared with single NBR, PVC/NBR and with elasticity
The tensile strength and tear resistance of body are improved, and wearability, solvent resistance and resistance to ozone cracking are significantly improved, and mention
High self-extinguishment.But since NBR cold resistance, wearability etc. are poor, the PVC/NBR that forms and with elastic after PVC is added in addition
The decline of the performances such as cold resistance, the elasticity of body, which limits its application ranges.Past is in order to improve the elastic, wear-resisting of NBR
Property, reduce its brittleness temperature, realized frequently with butadiene rubber (BR) method therewith is added.And PVC and BR are due to pole
Property difference it is too big, interface cohesion is bad, and PVC/BR paralled system seldom uses.It is low that price is added in PVC/NBR paralled system
Honest and clean (only 1/2 or so of NBR price), elasticity is good, wearability and the superior BR of cold resistance improve PVC/NBR binary mixture
The performances such as elasticity, wearability and the cold resistance of system reduce the material cost of PVC/NBR co-mixing system and expand its application field.
For manufacturing various sealing element products, a large amount of phthalate plasticizers are added to be made PVC/NBR/BR elastomer
With being easy to be precipitated in the process, " secondary pollution " is caused, in the relatively high environment of temperature, is easy to cause the exceeded of VOC emission.Benefit
Replace existing small molecule plasticizer with polyester plasticizer, it is elastic same improving PVC/NBR/BR ternary blending elastomer
When, its VOC emission is reduced, environment protection requirement is reached.Environment-friendly type height rebound PVC/NBR/BR elastomer is for manufacturing automobile
The products such as interior material, sealing strip, spare and accessory parts, have a vast market application prospect.
Summary of the invention
The present invention provides a kind of environment-friendly type height rebound PVC/NBR/BR elastic body sealing strip, migration good with resilience
The features such as property is low, excellent combination property.
The present invention also provides a kind of preparation methods of environment-friendly type height rebound PVC/NBR/BR elastic body sealing strip.
The technical solution adopted by the present invention to solve the technical problems is:
A kind of environment-friendly type height rebound PVC/NBR/BR elastic body sealing strip, the sealing strip are mainly made of the following raw material:
100 parts of PVC, 10 ~ 70 parts of NBR, 10 ~ 50 parts of modified BR, 10 ~ 60 parts of polyester plasticizers, 5 ~ 20 parts of epoxidized soybean oils, 10 ~ 60 parts
Superfine white carbon black, 10 ~ 40 parts of carbon blacks, 1 ~ 3 part of stearic acid, 2 ~ 8 parts of zinc oxide, 2 ~ 6 parts of calcium-zinc composite stabilizing agents, 1 ~ 5 part of double uncle
Butyl peroxy cumene, 1 ~ 3 part of antioxidant 4010NA.20 ~ 300 nanometers of the partial size of superfine white carbon black.
Preferably, the modified BR is N,N-DMAA graft modification BR.
Preferably, the polyester plasticizer is poly- nadic acid binary alcohol esters, ProductName abbreviation P-MPO-NA, P-BDO-
NA and P-DEG-NA, molecular weight is in 4000 ~ 9000 ranges.
Preferably, the preparation method of the N,N-DMAA graft modification BR stone is: N, N- dimethyl propylene
N, N- dimethyl allene acyl is made by graft reaction under the action of initiator dual-tert-butyl cumene hydroperoxide in acrylamide
Amine graft modification BR.Further, the preparation method of the N,N-DMAA graft modification BR stone is: by BR, N,
N- dimethylacrylamide, dual-tert-butyl cumene hydroperoxide are added to mechanical blending in mixer, in 150 DEG C ~ 180 DEG C items
It is reacted 10~30 minutes under part, N,N-DMAA graft modification BR is made.Preferably, described BR, N, N- bis-
Methacrylamide, dual-tert-butyl cumene hydroperoxide feed intake mass ratio be 100:1~15:0.1 ~ 1.
A kind of preparation method of the environment-friendly type height rebound PVC/NBR/BR elastic body sealing strip, this method is: will be each
Raw material is added to 10 ~ 15min of mixer mixing discharging, is added to extruder, squeezes out under the conditions of 160 DEG C ~ 180 DEG C of processing temperature
It is granulated, by pellet under the conditions of 160 DEG C ~ 180 DEG C of processing temperature, 170-180 DEG C of die temperature, by extruder extrusion molding,
Environment-friendly type height is made and springs back PVC/NBR/BR elastic body sealing strip.
Compared with prior art, the beneficial effects of the present invention are embodied in following several respects:
1, environment-friendly type height produced by the present invention springs back PVC/NBR/BR elastic body sealing strip, using N, N- dimethyl allene acyl
Amine graft modification BR has both polar amide groups and alkene nonpolarity segment, can greatly improve with the compatibility of PVC, NBR, thus
Improve the mechanical property of material, N,N-DMAA graft modification BR still maintains good elasticity, wearability and resistance to
It is cold, to effectively improve the performances such as the elasticity of PVC/NBR binary blends, wearability and cold resistance；
2, environment-friendly type height produced by the present invention springs back PVC/NBR/BR elastic body sealing strip, poly- nadic acid binary used
Alcohol ester plasticizer molecule amount has better thermal stability between 4000 ~ 9000, compared to small molecule plasticizer, is improving PVC
Thermoplastic elastomer (TPE) is elastic simultaneously, reduces its VOC emission, reaches environment protection requirement；
3, environment-friendly type height produced by the present invention springs back PVC/NBR/BR elastic body sealing strip, poly- nadic acid binary used
Alcohol ester plasticiser has excellent resistance to migration and resistance to extractable in PVC/PNBR matrix, reduces " the two of materials'use process
Secondary pollution ".
Environment-friendly type height of the present invention rebound PVC/NBR/BR elastic body sealing strip have resilience is good, migration is low,
The features such as excellent combination property, the use suitable for industries such as automobile, building, wire and cable, household electrical appliance.Ring of the present invention
Guarantor's type height rebound PVC/NBR/BR elastic body sealing strip it is nontoxic it is odorless, have excellent performance, be applied widely, meeting environmental requirement.
Specific embodiment
Below by specific embodiment, technical scheme of the present invention will be further explained in detail.It should be appreciated that this hair
Bright implementation is not limited by the following examples, and the accommodation in any form made to the present invention and/or changed will all be fallen
Enter the scope of the present invention.
In the present invention, if not refering in particular to, all parts, percentage are unit of weight, used equipment and raw material etc.
It is commercially available or commonly used in the art.Method in following embodiments is unless otherwise instructed the normal of this field
Rule method.
Superfine white carbon black is purchased from Shandong Zhong Hai new material Group Co., Ltd；
Calcium-zinc composite stabilizing agent is purchased from Yixing City Hao Sheng Chemical Co., Ltd..
Embodiment 1
The preparation of N,N-DMAA graft modification BR: by 100 parts of BR(butadiene rubbers), 10 parts of N, N- dimethyl
Acrylamide, 1 part of dual-tert-butyl cumene hydroperoxide are added in mixer, the mechanical blending reaction 10 under the conditions of 180 DEG C
Minute, N,N-DMAA graft modification BR is made.
Embodiment 2
The preparation manipulation of N,N-DMAA graft modification BR is the same as embodiment 1.BR, N, N- dimethyl allene acyl
Amine, dual-tert-butyl cumene hydroperoxide feed intake mass ratio be 100:1:0.1, under the conditions of 150 DEG C mechanical blending reaction 30
Minute.
Embodiment 3
The preparation manipulation of N,N-DMAA graft modification BR is the same as embodiment 1.BR, N, N- dimethyl allene acyl
Amine, dual-tert-butyl cumene hydroperoxide feed intake mass ratio be 100:5:0.3, under the conditions of 160 DEG C mechanical blending reaction 20
Minute.
Embodiment 4
The preparation manipulation of N,N-DMAA graft modification BR is the same as embodiment 1.BR, N, N- dimethyl allene acyl
Amine, dual-tert-butyl cumene hydroperoxide feed intake mass ratio be 100:6.5:0.45, under the conditions of 170 DEG C mechanical blending react
16 minutes.
Embodiment 5
The preparation manipulation of N,N-DMAA graft modification BR is the same as embodiment 1.BR, N, N- dimethyl allene acyl
Amine, dual-tert-butyl cumene hydroperoxide feed intake mass ratio be 100:7.5:0.55, under the conditions of 165 DEG C mechanical blending react
12 minutes.
Embodiment 6
100 parts of PVC, 70 parts of NBR, 10 parts of N,N-DMAA graft modification BR(embodiments 4 are made), 60 parts
Poly- nadic acid binary alcohol esters (P-MPO-NA), 5 parts of epoxidized soybean oils, 60 parts of superfine white carbon blacks, 10 parts of carbon blacks, 3 parts of stearic acid,
8 parts of zinc oxide, 6 parts of calcium-zinc composite stabilizing agents, 5 parts of dual-tert-butyl cumene hydroperoxides, 3 parts of antioxidant 4010NAs are added to close
Mill is kneaded 15min discharging, is added to extruder, extruding pelletization under the conditions of 160 DEG C of processing temperature, by pellet in processing temperature
(170 DEG C of die temperature) is made environment-friendly type height and springs back PVC/NBR/BR by extruder extrusion molding under the conditions of 160 DEG C ~ 180 DEG C
Elastic body sealing strip.
Measuring the sealing strip tensile strength is 13.6MPa, and compression set (after storing for 24 hours under the conditions of 70 DEG C, is compressed
8mm removes load 1h) it is 38.2%.
Embodiment 7
Environment-friendly type height springs back the preparation manipulation of PVC/NBR/BR elastic body sealing strip with embodiment 6.The rebound of environment-friendly type height
The formula of PVC/NBR/BR elastic body sealing strip is 100 parts of PVC, 10 parts of NBR, 50 parts of N,N-DMAA graft modifications
BR(embodiment 3 be made), 10 parts of P-BDO-NA, 20 parts of epoxidized soybean oils, 10 parts of superfine white carbon blacks, 40 parts of carbon blacks, 1 part of tristearin
Acid, 2 parts of zinc oxide, 2 parts of calcium-zinc composite stabilizing agents, 1 part of dual-tert-butyl cumene hydroperoxide, 1 part of antioxidant 4010NA.
Measuring the sealing strip tensile strength is 10.2MPa, and compression set (after storing for 24 hours under the conditions of 70 DEG C, is compressed
8mm removes load 1h) it is 32.3%.
Embodiment 8
Environment-friendly type height springs back the preparation manipulation of PVC/NBR/BR elastic body sealing strip with embodiment 6.The rebound of environment-friendly type height
The formula of PVC/NBR/BR elastic body sealing strip is 100 parts of PVC, 20 parts of NBR, 30 parts of N,N-DMAA graft modifications
BR(embodiment 5 be made), 35 parts of poly- nadic acid binary alcohol esters P-DEG-NA, 15 parts of epoxidized soybean oils, 35 parts of superfine white carbon blacks,
20 parts of carbon blacks, 2 parts of stearic acid, 4 parts of zinc oxide, 4 parts of calcium-zinc composite stabilizing agents, 3 parts of dual-tert-butyl cumene hydroperoxides, 2 parts
Antioxidant 4010NA.
Measuring the sealing strip tensile strength is 14.2MPa, and compression set (after storing for 24 hours under the conditions of 70 DEG C, is compressed
8mm removes load 1h) it is 31.0%.
Embodiment 9
Environment-friendly type height springs back the preparation manipulation of PVC/NBR/BR elastic body sealing strip with embodiment 6.The rebound of environment-friendly type height
The formula of PVC/NBR/BR elastic body sealing strip is 100 parts of PVC, 45 parts of NBR, 35 parts of N,N-DMAA graft modifications
BR(embodiment 2 be made), 45 parts of poly- nadic acid binary alcohol esters P-MPO-NA, 18 parts of epoxidized soybean oils, 42 parts of superfine white carbon blacks,
26 parts of carbon blacks, 2.5 parts of stearic acid, 5 parts of zinc oxide, 6 parts of calcium-zinc composite stabilizing agents, 3.5 parts of dual-tert-butyl cumene hydroperoxides,
1.5 parts of antioxidant 4010NAs.
Measuring the sealing strip tensile strength is 15.3MPa, and compression set (after storing for 24 hours under the conditions of 70 DEG C, is compressed
8mm removes load 1h) it is 29.4%.
As a comparison, N in the environment-friendly type height rebound PVC/NBR/BR elastic body sealing strip formula of embodiment 9, N- dimethyl
Modified by Acrylamide Graft BR is replaced by the unmodified BR of equal parts, and polyester plasticizer P-MPO-NA is by equal parts in formula
Phthalate plasticizers DOP is replaced, and the performance test results of gained PVC/NBR/BR elastic body sealing strip are relatively shown in Table 1.
Table 1
| PVC/NBR/BR elastic body sealing strip | Environment-friendly type height springs back PVC/NBR/BR elastic body sealing strip | |
| Tensile strength (MPa) | 6.8 | 15.3 |
| Elongation rate of tensile failure (%) | 269 | 427 |
| Compression set (%) | 36.4 | 29.4 |
| Pollution: 80oC × for 24 hours+63oC × 16h, loading 4.41N | There is pollution | It is pollution-free |
PVC/NBR/BR elastic body sealing strip formula is 100 parts of PVC, 45 parts of NBR, 35 parts of BR, 45 parts of DOP, 18 parts of epoxies
Soybean oil, 42 parts of superfine white carbon blacks, 26 parts of carbon blacks, 2.5 parts of stearic acid, 5 parts of zinc oxide, 6 parts of calcium-zinc composite stabilizing agents, 3.5 parts
Dual-tert-butyl cumene hydroperoxide, 1.5 parts of antioxidant 4010NAs, preparation process is the same as embodiment 9；Environment-friendly type height springs back PVC/
NBR/BR elastic body sealing strip: formula and preparation process are the same as embodiment 9.
It is from tensile strength as can be seen that modified compared to BR and plasticizer DOP, invent N used, N- dimethyl allene acyl
The addition of amine graft modification BR, poly- nadic acid binary alcohol esters more effectively improve the strong of PVC/NBR/BR elastic body sealing strip
Degree；And ductility, the resilience of environment-friendly type height rebound PVC/NBR/BR elastic body sealing strip are modified better than BR and plasticizer DOP
PVC/NBR/BR elastic body sealing strip.In the case where loading heating condition, environment-friendly type height springs back PVC/NBR/BR elastic body sealing strip
VOC emission is far below tradition BR and plasticizer DOP modified PVC/NBR/BR elastic body sealing strip.
Above-mentioned embodiment is only a preferred solution of the present invention, not the present invention is made in any form
Limitation, there are also other variations and modifications on the premise of not exceeding the technical scheme recorded in the claims.
Claims (6)
1. a kind of environment-friendly type height springs back PVC/NBR/BR elastic body sealing strip, it is characterised in that: the sealing strip is mainly by as follows
Raw material is made: 100 parts of PVC, 10 ~ 70 parts of NBR, 10 ~ 50 parts of N,N-DMAA graft modification BR, 10 ~ 60 parts of polyester
Plasticizer, 5 ~ 20 parts of epoxidized soybean oils, 10 ~ 60 parts of superfine white carbon blacks, 10 ~ 40 parts of carbon blacks, 1 ~ 3 part of stearic acid, 2 ~ 8 parts of oxidations
Zinc, 2 ~ 6 parts of calcium-zinc composite stabilizing agents, 1 ~ 5 part of dual-tert-butyl cumene hydroperoxide, 1 ~ 3 part of antioxidant 4010NA.
2. environment-friendly type height according to claim 1 springs back PVC/NBR/BR elastic body sealing strip, it is characterised in that: described poly-
Ester plasticiser is poly- nadic acid binary alcohol esters, and ProductName abbreviation P-MPO-NA, P-BDO-NA and P-DEG-NA, molecular weight exists
4000 ~ 9000 ranges.
3. environment-friendly type height according to claim 1 springs back PVC/NBR/BR elastic body sealing strip, it is characterised in that: the N,
The preparation method of N- dimethylacrylamide graft modification BR is: N,N-DMAA is in initiator dual-tert-butyl peroxide
N,N-DMAA graft modification BR is made by graft reaction under the action of change cumene.
4. environment-friendly type height according to claim 3 springs back PVC/NBR/BR elastic body sealing strip, it is characterised in that: the N,
The preparation method of N- dimethylacrylamide graft modification BR is: by BR, N,N-DMAA, dual-tert-butyl peroxidating
Cumene is added to mechanical blending in mixer, reacts 10~30 minutes under the conditions of 150 DEG C ~ 180 DEG C, and N, N- diformazan is made
Base Modified by Acrylamide Graft BR.
5. environment-friendly type height according to claim 3 or 4 springs back PVC/NBR/BR elastic body sealing strip, it is characterised in that: institute
The BR that states, N,N-DMAA, dual-tert-butyl cumene hydroperoxide the mass ratio that feeds intake be 100:1~15:0.1 ~
1。
6. a kind of preparation method of environment-friendly type height rebound PVC/NBR/BR elastic body sealing strip described in claim 1, feature
Being this method is: each raw material being added to 10 ~ 15min of mixer mixing discharging, extruder is added to, in processing temperature 160
DEG C ~ 180 DEG C under the conditions of extruding pelletization, by pellet under the conditions of 160 DEG C ~ 180 DEG C of processing temperature, 170-180 DEG C of die temperature, lead to
Extruder extrusion molding is crossed, environment-friendly type height is made and springs back PVC/NBR/BR elastic body sealing strip.
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| CN110358217A (en) * | 2019-07-17 | 2019-10-22 | 仙居县润丰汽车零部件制造有限公司 | A kind of production method of environment-friendly type low migration automobile sealing element and sealing element |
| CN110511506B (en) * | 2019-08-14 | 2021-04-30 | 宁波一舟塑胶有限公司 | Low-volatility PVC modified material and preparation method thereof |
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|---|---|---|---|---|
| CN101704977A (en) * | 2009-11-13 | 2010-05-12 | 江苏恒峰线缆有限公司 | Polyvinyl chloride/sulfonated cis-butadiene rubber and preparation method thereof |
| CN102391482A (en) * | 2011-09-13 | 2012-03-28 | 江南大学 | Non-toxic environmentally friendly nadic anhydride polyester plasticizer and preparation method thereof |
| CN102731929A (en) * | 2012-06-18 | 2012-10-17 | 成都新兴富皇高分子材料科技有限公司 | PVC thermoplastic elastomer material and preparation method thereof |
| CN103059468A (en) * | 2012-12-25 | 2013-04-24 | 东莞市祺龙电业有限公司 | Low temperature resistant environment-friendly polyvinyl chloride (PVC) modified material and preparing method thereof |
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- 2017-07-20 CN CN201710596130.XA patent/CN107216576B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101704977A (en) * | 2009-11-13 | 2010-05-12 | 江苏恒峰线缆有限公司 | Polyvinyl chloride/sulfonated cis-butadiene rubber and preparation method thereof |
| CN102391482A (en) * | 2011-09-13 | 2012-03-28 | 江南大学 | Non-toxic environmentally friendly nadic anhydride polyester plasticizer and preparation method thereof |
| CN102731929A (en) * | 2012-06-18 | 2012-10-17 | 成都新兴富皇高分子材料科技有限公司 | PVC thermoplastic elastomer material and preparation method thereof |
| CN103059468A (en) * | 2012-12-25 | 2013-04-24 | 东莞市祺龙电业有限公司 | Low temperature resistant environment-friendly polyvinyl chloride (PVC) modified material and preparing method thereof |
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Denomination of invention: Environmentally friendly high resilience PVC/NBR/BR elastomer sealing strip and preparation method thereof Effective date of registration: 20220803 Granted publication date: 20190618 Pledgee: Zhejiang Xianju Rural Commercial Bank Co., Ltd. Baita Sub-branch Pledgor: ZHEJIANG XIANJU XINGFENG AUTOMOBILE PARTS Co.,Ltd. Registration number: Y2022330001604 |