CN101735426A - Polyurethane elastomer composition for producing copier scrapers - Google Patents
Polyurethane elastomer composition for producing copier scrapers Download PDFInfo
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- CN101735426A CN101735426A CN200910256450A CN200910256450A CN101735426A CN 101735426 A CN101735426 A CN 101735426A CN 200910256450 A CN200910256450 A CN 200910256450A CN 200910256450 A CN200910256450 A CN 200910256450A CN 101735426 A CN101735426 A CN 101735426A
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- prepolymer
- polyester polyol
- diphenylmethanediisocyanate
- scrapers
- copier
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Abstract
The invention relates to a polyurethane elastomer composition for producing copier scrapers, which comprises a prepolymer component and a small molecular polyol curing agent component, wherein the prepolymer is obtained by reaction of polyester polyol and methyl diphenylene diisocyanate at 70-90 DEG C, and the content of the isocyanato in the obtained prepolymer is 6-8%; 1,4-butanediol and TMP are mixed to be used as the curing agent component; and after the two components are mixed, the mixture is vulcanized at the mold temperature of 120-140 DEG C to obtain a polyurethane elastomer product with excellent performance. The product is suitable for producing copier scrapers.
Description
Technical field
The invention belongs to the polyurethane elastomeric compositions field, particularly a kind of polyurethane elastomeric compositions that is used to produce copier scrapers.
Background technology
Polyurethane elastomer is by soft section and hard section a kind of segmented copolymer that constitutes, and is characterized in that goods hardness setting range is wide, has the favorable mechanical performance.Urethane has been deep in national economy and the people's lives, becomes a kind of development synthetic materials rapidly.Copier scrapers is used for duplicating machine to remove residual ink marks on the photoreceptor.Usually the copier scrapers of usefulness adopts polycaprolactone glycol (PCL) to be used to synthesize for main raw material more, document " development of polyurethane elastomer of duplicating machine cleaning blade ", and polyurethane industrial 2009,24 (6) 21 ~ 24, research done in a literary composition to this.But polycaprolactone glycol (PCL) turnout is little, and the price height is about 3 times of common polyester polyol, the expensive widespread use that has limited it.The synthetic polyurethane prepolymer of producing of the pure and mild diphenylmethanediisocyanate of polyester polyols, common processing temperature is difficult to obtain transparent The PU products in this processing temperature between 100 ~ 120 ℃.
Summary of the invention
Technical problem to be solved by this invention provides a kind of polyurethane elastomeric compositions that is used to produce copier scrapers, and mechanical property is good, rebound resilience is good, the goods water white transparency.
A kind of polyurethane elastomeric compositions that is used to produce copier scrapers of the present invention is characterized in that being made up of two kinds of components:
Prepolymer: obtain: by weight percentage according to the method for being prepared as follows, be that 2000 polyester polyol 65%～75% was 70 ℃～90 ℃ reactions 2～3 hours by vulcabond 25%～35% and molecular weight, obtain the isocyano mass content and be 6～8% prepolymer, described polyester polyol adopt functionality be 2 and the polyester polyol of number-average molecular weight in 2000 ± 100 scopes one or more mix, described vulcabond is by 4, the liquefaction 4 of 4 '-diphenylmethanediisocyanate (MDI-100) and modification, the blend of 4 '-diphenylmethanediisocyanate is formed, wherein 4,4 '-diphenylmethanediisocyanate accounts for 60%～100% of blend vulcabond gross weight;
Solidifying agent: adopt a kind of small molecules polyvalent alcohol solidifying agent, mix by in butyleneglycol, TriMethylolPropane(TMP), ethylene glycol, the trolamine one or more;
The solidifying agent that prepolymer is heated to 80～90 ℃ and 40 ℃ mixes, the mixing quality ratio is a prepolymer: solidifying agent=100: 6～8, be poured into 100～140 ℃, in preferred 120～140 ℃ mould, demould time 30 minutes, 100 ℃～115 ℃ postcure 8～10 hours, obtain the polyurethane elastomer goods then.
Wherein optimized technical scheme is:
The liquefaction diphenylmethanediisocyanate of described modification is 4 of carbodiimide modification, 4 '-diphenylmethanediisocyanate.
Polyester polyol is that hexanodioic acid and ethylene glycol are that the polyester polyol of initiator or hexanodioic acid, ethylene glycol and 1,4-butyleneglycol are polyester polyol of initiator and composition thereof.Preferred number average molecular weight 2000 ± 100.As CMA244, CMA24, CMA44, ODX218 and composition thereof.
Described solidifying agent is the mixture of butyleneglycol and TriMethylolPropane(TMP), and the mixing quality ratio is a butyleneglycol: TriMethylolPropane(TMP)=1.5: 1～4: 1, preferred 2: 1～4: 1.
Elastic composition of the present invention can obtain water white polyurethane elastomer goods in described processing temperature.The solidifying agent polyvalent alcohol uses by different mixed, can obtain shore hardness at 65～85 goods.Described elastic composition, it is mainly used in the making of copier scrapers material and textile rubber roll.
Embodiment
Following examples material therefor is as follows: be not specifically noted, each percentage ratio refers to mass percent.
CMA244 (commercially available prod model, down together): number-average molecular weight 2000, hexanodioic acid, ethylene glycol, butyleneglycol synthetic polyester diol
0DX218: number-average molecular weight 2000, hexanodioic acid, ethylene glycol, propylene glycol synthetic polyester diol
CMA44: number-average molecular weight 2000, hexanodioic acid, butyleneglycol synthetic polyester diol
CMA24: number-average molecular weight 2000, hexanodioic acid, ethylene glycol synthetic polyester diol
MDI-100:4,4 '-diphenylmethanediisocyanate
TMP: TriMethylolPropane(TMP)
Liquefied mdi: 4 of carbodiimide modification, 4 '-diphenylmethanediisocyanate
Embodiment 1:
Prepolymer: the polyester polyol of molecular weight 2000 (CMA24) 75%, diphenylmethanediisocyanate (MDI-100) 25% (0.095MPa) remove bubble, obtain isocyano-content and be 6% prepolymer in 2～3 hours vacuum of 70 ℃ of reactions.
Solidifying agent: 1,4-butyleneglycol/TMP=2/1 (mass ratio)
Product processing method is the prepolymer solidifying agent that is heated to 80～90 ℃ and 40 ℃ by 100/6 mixed, be poured into the mould temperature and be on 120～140 ℃ the mould, demould time 30 minutes, then 100 ℃～115 ℃ postcure 8～10 hours, obtain the water white transparency polyurethane elastomer, goods hardness is 65A (Shao Shi A)
Embodiment 2:
Prepolymer: the polyester polyol (CMA24) 40%, 4 of the polyester polyol of molecular weight 2000 (ODX218) 30%, molecular weight 2000,4 '-diphenylmethanediisocyanate (MDI100) 25%, liquefied mdi 5%, 70 ℃～90 ℃ reactions 2～3 hours, vacuum (0.095MPa) removes bubble, obtains isocyano-content and be 7% prepolymer.
Solidifying agent: 1,4-butyleneglycol/TMP=3/1 (mass ratio)
The solidifying agent that prepolymer is heated to 80～90 ℃ and 40 ℃ is by 100/7 mixed, be poured into the mould temperature and be on 120～140 ℃ the mould, demould time 30 minutes, then 100 ℃～115 ℃ postcure 8～10 hours, obtain the water white transparency polyurethane elastomer, goods hardness is 70A (Shao Shi A)
Embodiment 3:
Prepolymer: the polyester polyol (CMA24) 35%, 4 of the polyester polyol of molecular weight 2000 (CMA44) 30%, molecular weight 2000,4 '-diphenylmethanediisocyanate (MDI100) 21%, liquefied mdi 14%, 70 ℃～90 ℃ reactions 2～3 hours, vacuum (0.095MPa) removes bubble, obtains isocyano-content and be 8% prepolymer.
Solidifying agent: 1,4-butyleneglycol/TMP=4/1 (mass ratio)
The solidifying agent that prepolymer is heated to 80～90 ℃ and 40 ℃ is by 100/8 mixed, be poured into the mould temperature and be on 120～140 ℃ the mould, demould time 30 minutes, then 100 ℃～115 ℃ postcure 8～10 hours, obtain the water white transparency polyurethane elastomer, goods hardness is 85A (Shao Shi A)
Comparison example:
Prepolymer: the polycaprolactone polyol of molecular weight 2000 (PCL) 70%, 4,4 '-diphenylmethanediisocyanate (MDI100) 25%, liquefied mdi 5% were 70 ℃～90 ℃ reactions 2～3 hours, vacuum (0.095MPa) removes bubble, obtains isocyano-content and be 7% prepolymer.
Solidifying agent: 1,4-butyleneglycol/TMP=3/1 (mass ratio)
The solidifying agent that prepolymer is heated to 80～90 ℃ and 40 ℃ is by 100/8 mixed, be poured into the mould temperature and be on 100～120 ℃ the mould, demould time 30 minutes, then 100 ℃～115 ℃ postcure 8～10 hours, obtain translucent polyurethane elastomer, goods hardness is 70A (Shao Shi A).
Polyurethane elastomer product properties such as following table:
| Project | Embodiment 1 | Embodiment 2 | Embodiment 3 | Comparison example |
| Hardness (Shao A) | ??65 | ??70 | ??85 | ??70 |
| Tensile strength (Mpa) | ??35.7 | ??41.6 | ??45.6 | ??37.4 |
| Elongation % | ??300 | ??450 | ??400 | ??400 |
| Tear strength (KN/m) | ??35.2 | ??44.3 | ??56.0 | ??43.2 |
| Resilience % | ??20 | ??30 | ??33 | ??35 |
| Products appearance | Water white transparency | Water white transparency | Water white transparency | Translucent |
Claims (3)
1. polyurethane elastomeric compositions that is used to produce copier scrapers is characterized in that being made up of two kinds of components:
Prepolymer: obtain: by weight percentage according to the method for being prepared as follows, be that 2000 polyester polyol 65%～75% was 70 ℃～90 ℃ reactions 2～3 hours by vulcabond 25%～35% and molecular weight, obtain the isocyano mass content and be 6～8% prepolymer, described polyester polyol adopt functionality be 2 and the polyester polyol of number-average molecular weight in 2000 ± 100 scopes one or more mix, described vulcabond is by 4, the liquefaction 4 of 4 '-diphenylmethanediisocyanate and modification, the blend of 4 '-diphenylmethanediisocyanate is formed, wherein 4,4 '-diphenylmethanediisocyanate accounts for 60%～100% of blend vulcabond gross weight;
Solidifying agent: the mixture of butyleneglycol and TriMethylolPropane(TMP), mixing quality ratio are butyleneglycol: TriMethylolPropane(TMP)=2: 1～4: 1;
The solidifying agent that prepolymer is heated to 80～90 ℃ and 40 ℃ mixes, the mixing quality ratio is a prepolymer: solidifying agent=100: 6～8 are poured in 100～140 ℃ the mould demould time 30 minutes, 100 ℃～115 ℃ postcure 8～10 hours, obtain the polyurethane elastomer goods then.
2. elastic composition according to claim 1, the liquefaction diphenylmethanediisocyanate that it is characterized in that described modification is 4 of carbodiimide modification, 4 '-diphenylmethanediisocyanate.
3. elastic composition according to claim 1 is characterized in that described polyester polyol is that hexanodioic acid and ethylene glycol are that the polyester polyol of initiator or hexanodioic acid, ethylene glycol and 1,4-butyleneglycol are polyester polyol of initiator and composition thereof.
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| CN200910256450A CN101735426A (en) | 2009-12-25 | 2009-12-25 | Polyurethane elastomer composition for producing copier scrapers |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103665318A (en) * | 2013-12-19 | 2014-03-26 | 浙江华峰新材料股份有限公司 | Polyurethane resin and application therefore in preparation of high-hardness high-transparency printer scraper blade |
| CN105254831A (en) * | 2015-11-23 | 2016-01-20 | 中国兵器工业集团第五三研究所 | Casted transparent polyurethane elastomer |
| CN106632981A (en) * | 2016-12-30 | 2017-05-10 | 山东诺威聚氨酯股份有限公司 | Three-component low-temperature-resistant polyester type polyurethane elastomer and preparation method thereof |
| WO2017079988A3 (en) * | 2015-11-11 | 2017-06-15 | 万华化学集团股份有限公司 | Thermoplastic polyurethane elastomer, and preparation method, use and product thereof |
| CN107501514A (en) * | 2017-08-15 | 2017-12-22 | 百恩实业（深圳）有限公司 | A kind of casting type polyurethane elastomer semi-prepolymer for producing screen printing brush coating and scraping |
| CN110951034A (en) * | 2019-12-19 | 2020-04-03 | 万果新材料科技(上海)有限公司 | High-load-bearing low-endogenous heat polyurethane elastomer and preparation method thereof |
| CN114149559A (en) * | 2021-12-07 | 2022-03-08 | 黎明化工研究设计院有限责任公司 | High-strength and high-elongation thermoplastic polyurethane material and preparation method and application thereof |
-
2009
- 2009-12-25 CN CN200910256450A patent/CN101735426A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103665318A (en) * | 2013-12-19 | 2014-03-26 | 浙江华峰新材料股份有限公司 | Polyurethane resin and application therefore in preparation of high-hardness high-transparency printer scraper blade |
| WO2017079988A3 (en) * | 2015-11-11 | 2017-06-15 | 万华化学集团股份有限公司 | Thermoplastic polyurethane elastomer, and preparation method, use and product thereof |
| US11286328B2 (en) | 2015-11-11 | 2022-03-29 | Wanhua Chemical Group Co., Ltd. | Thermoplastic polyurethane elastomer, and preparation method, use and product thereof |
| CN105254831A (en) * | 2015-11-23 | 2016-01-20 | 中国兵器工业集团第五三研究所 | Casted transparent polyurethane elastomer |
| CN106632981A (en) * | 2016-12-30 | 2017-05-10 | 山东诺威聚氨酯股份有限公司 | Three-component low-temperature-resistant polyester type polyurethane elastomer and preparation method thereof |
| CN107501514A (en) * | 2017-08-15 | 2017-12-22 | 百恩实业（深圳）有限公司 | A kind of casting type polyurethane elastomer semi-prepolymer for producing screen printing brush coating and scraping |
| CN107501514B (en) * | 2017-08-15 | 2020-07-14 | 百恩实业（深圳）有限公司 | Casting type polyurethane elastomer semi-prepolymer for producing screen printing rubber scraper |
| CN110951034A (en) * | 2019-12-19 | 2020-04-03 | 万果新材料科技(上海)有限公司 | High-load-bearing low-endogenous heat polyurethane elastomer and preparation method thereof |
| CN110951034B (en) * | 2019-12-19 | 2022-03-01 | 万果新材料科技(上海)有限公司 | High-load-bearing low-endogenous heat polyurethane elastomer and preparation method thereof |
| CN114149559A (en) * | 2021-12-07 | 2022-03-08 | 黎明化工研究设计院有限责任公司 | High-strength and high-elongation thermoplastic polyurethane material and preparation method and application thereof |
| CN114149559B (en) * | 2021-12-07 | 2023-12-15 | 黎明化工研究设计院有限责任公司 | High-strength high-elongation thermoplastic polyurethane material and preparation method and application thereof |
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Open date: 20100616 |