CN103012723A - Preparation method of polyurethane elastomer composition for industrial synchronous belt - Google Patents
Preparation method of polyurethane elastomer composition for industrial synchronous belt Download PDFInfo
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- CN103012723A CN103012723A CN2012105935247A CN201210593524A CN103012723A CN 103012723 A CN103012723 A CN 103012723A CN 2012105935247 A CN2012105935247 A CN 2012105935247A CN 201210593524 A CN201210593524 A CN 201210593524A CN 103012723 A CN103012723 A CN 103012723A
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- timing belt
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Abstract
The invention relates to a preparation method of a polyurethane elastomer composition for an industrial synchronous belt, and belongs to the field of preparation methods of the polyurethane elastomers. The polyurethane elastomer composition is formed by compounding polyurethane elastomers with two rigidities, wherein the polyether polyurethane elastomer with the rigidity of Shore 80-94A is used as a bottom layer structure, and the polyether polyurethane elastomer with the rigidity of Shore 55-65A is used as a surface layer structure, and the bottom layer and the surface layer are bonded with each other. The polyurethane synchronous belt is excellent in mechanical property, high in rebound resilience and endurable.
Description
Technical field
The present invention relates to a kind of preparation method for industrial Timing Belt polyurethane elastomeric compositions, belong to the making method field of polyurethane elastomer.
Background technology
Urethane is specially to refer to the class material of boundary between rubber and plastics, usually makes with oligomer polyol, polyisocyanates, chainextender and a small amount of auxiliary agent.In many cases, with the metallic substance ratio, that the polyurethane elastomer goods have is lightweight, low noise, abrasion performance, processing charges is low and the advantage such as corrosion-resistant.Compare with plastics, polyurethane elastomer has not the advantages such as embrittlement, good springiness, wear resistance be good.With the rubber phase ratio, wear-resisting, anti-cutting that polyurethane elastomer has, tear-resistant, high loading, transparent or semitransparent, anti-ozone, can be canned, pourable, the advantage such as durometer level is wide.
The casting PU Timing Belt has that durometer level is wide, snappiness, wear resisting property are excellent, the advantages such as physical strength is high, transmission power is large, smooth running.
Summary of the invention
According to the deficiencies in the prior art, the technical problem to be solved in the present invention is: a kind of preparation method for industrial Timing Belt polyurethane elastomeric compositions is provided, and product has excellent Mechanical Properties of Products and good process industrial art performance; Complete processing is simple simultaneously.
The technical solution adopted for the present invention to solve the technical problems is: a kind of preparation method for industrial Timing Belt polyurethane elastomeric compositions is provided, it is characterized in that being composited by bottom and two kinds of different hardness polyurethane elastomers of surface layer, its making method may further comprise the steps:
⑴ the preparation method of bottom:
1. polyurethane prepolymer uses tolylene diisocyanate (TDI) and polytetrahydrofuran ethoxylated polyhydric alcohol 75 ℃～85 ℃ reactions 3 hours, the vacuum removal bubble, sampling detection isocyanate content, detect qualified after, airtight saving backup;
2. solidifying agent is selected from 3,3 ˊ-two chloro-, 4,4 ˊ-diaminodiphenyl-methane (MOCA), 3,5-dimethythiotoluene diamine (E-300) or their mixture;
3. the making of polyurethane elastomer: solidifying agent and prepolymer are with NH
2The mol ratio of/NCO is 0.9 to carry out hybrid reaction, and mixing temperature is 75 ℃～85 ℃, and the goods curing temperature is 100 ℃～120 ℃, vulcanizes the demoulding in 30～60 minutes, 90 ℃～110 ℃ postcure 8～10 hours, obtains bottom polyurethane elastomer goods;
⑵ the making method of surface layer
1. polyurethane prepolymer uses tolylene diisocyanate, the pure and mild softening agent of polyester polyols 75 ℃～85 ℃ reactions 3 hours, the vacuum removal bubble, sampling detects isocyanate content, detect qualified after, airtight saving backup;
2. solidifying agent is 3,5-dimethythiotoluene diamine;
3. the making of polyurethane elastomer: solidifying agent and prepolymer are with NH
2The mol ratio of/NCO is 0.9 to carry out hybrid reaction, and mixing temperature is 75 ℃～85 ℃, and the goods curing temperature is 100 ℃～120 ℃, vulcanizes the demoulding in 30～60 minutes, 90 ℃～110 ℃ postcure 8～10 hours, obtains surface layer polyurethane elastomer goods.
The hardness of described two kinds of different hardness polyurethane elastomers is respectively: bottom polyurethane elastomer Shao Shi 80 ~ 94A and surface layer polyurethane elastomer goods are Shao Shi 55 ~ 65A.
Polytetrahydrofuran ethoxylated polyhydric alcohol functionality is 2, and number-average molecular weight is 1000～2000.
Polyester polyol is that the synthetic molecular weight of hexanodioic acid, ethylene glycol, Diethylene Glycol, butyleneglycol, propylene glycol or their mixture is 2000 polymkeric substance.
Tolylene diisocyanate is the 2,4 toluene diisocyanate that contains more than 98%.
Softening agent is dimethyl phthalate, diethyl phthalate, dibutyl phthalate, phthalic acid two butyl benzyls or Dimethoxyethyl phthalate.
Tolylene diisocyanate and polytetrahydrofuran ethoxylated polyhydric alcohol account for respectively 13.8%～24.6% and 75.4%～86.2% of both total masses among the preparation method of bottom.
Tolylene diisocyanate, the pure and mild softening agent of polyester polyols account for respectively 11.3%～13%, 77%～87% and 0 ~ 10% of three's total mass in the making method of surface layer.
Described hardness is that the polyurethane elastomer of Shao Shi 80 ~ 90A adopts the polyether(poly)urethane elastomerics as infrastructure, and described hardness to be the polyurethane elastomer of Shao Shi 55 ~ 65A adopt the PAUR elastomerics as surface layer structure, and bottom and surface layer mutually bond and form.
⑴ the making of infrastructure: polyether(poly)urethane prepolymer and solidifying agent stir and pour in the mould; ⑵ the making of surface layer structure: after the polyether(poly)urethane of infrastructure solidifies, the polyester type prepolymer and the solidifying agent that stir are poured in the mould.⑶ compression molding: after the PAUR of surface layer structure was solidified, compression molding made infrastructure and surface layer structure have good cohesiveness.
The invention has the beneficial effects as follows: synthetic casting PU Timing Belt has excellent Mechanical Properties of Products and good process industrial art performance, and over-all properties is best, and the storage-stable performance of product is better; By the industrial Timing Belt of polyurethane elastomer that said composition obtains, have excellent physical strength and wear resisting property, product is durable in use, and work-ing life, complete processing was simple simultaneously greater than the rubber synchronous belt of routine.
Embodiment
Below in conjunction with embodiment the present invention is described further:
The embodiment material therefor is as follows:
The PTMG dibasic alcohol of PTMG1000 number-average molecular weight 1000
The PTMG dibasic alcohol of PTMG2000 number-average molecular weight 2000
ODX-218: the index average molecular weight is 2000 poly-adipate glycol propylene glycol ester
CMA-244: the index average molecular weight is 2000 polybutyleneadipate glycol ester
CMA-24: the index average molecular weight is 2000 polyethylene glycol adipate
POL1256: the index average molecular weight is 2000 poly-hexanodioic acid Diethylene Glycol glycol ester
TDI-100:2, the 4-tolylene diisocyanate is greater than 98% TDI
MOCA:3,3 ˊ-two chloro-, 4,4 ˊ-diaminodiphenyl-methane
E-300:3, the 5-dimethythiotoluene diamine
Embodiment 1
The making of infrastructure:
1. polyurethane prepolymer, it is 3% prepolymer that the PTMG dibasic alcohol 86.2% that uses vulcabond (TDI-100) 13.8% and molecular weight 2000 obtained isocyano-content in 3 hours 75 ℃～85 ℃ reactions.
2. solidifying agent is selected from 3,3 ˊ-two chloro-, 4,4 ˊ-diaminodiphenyl-methane (MOCA)
3. the making of polyurethane elastomer: solidifying agent MOCA and prepolymer are with 0.9 NH
2The mol ratio of/NCO is carried out hybrid reaction, and mixing temperature is 75 ℃～85 ℃, and the goods curing temperature is 100 ℃～120 ℃, vulcanizes the demoulding in 40 minutes, and 90 ℃～110 ℃ postcure 9 hours, obtaining hardness was the polyurethane elastomer goods of Shao Shi 80A.
The making of surface layer structure:
1. polyurethane prepolymer, use tolylene diisocyanate (TDI-100) 11.3%, it is 2.1% prepolymer that the polyester diol CMA-24478.7% of molecular weight 2000 and plasticizer phthalic acid butyl benzyl (BBP) 10%% obtained isocyano-content in 3 hours 75 ℃～85 ℃ reactions.
2. solidifying agent is selected from 3,5-dimethythiotoluene diamine (E-300)
3. the making of polyurethane elastomer: solidifying agent E-300 and prepolymer are with 0.9 NH
2The mol ratio of/NCO is carried out hybrid reaction, and mixing temperature is 75 ℃～85 ℃, and the goods curing temperature is 100 ℃～120 ℃, vulcanizes the demoulding in 50 minutes, and 90 ℃～110 ℃ postcure 8 hours, obtaining hardness was the polyurethane elastomer goods of Shao Shi 55A.
Embodiment 2
The making of infrastructure:
1. polyurethane prepolymer, it is 3.6% prepolymer that the PTMG dibasic alcohol 85% that uses tolylene diisocyanate (TDI-100) 15% and molecular weight 2000 obtained isocyano-content in 3 hours 75 ℃～85 ℃ reactions.
2. solidifying agent is selected from 3,3 ˊ-two chloro-, 4,4 ˊ-diaminodiphenyl-methane (MOCA)
3. the making of polyurethane elastomer: solidifying agent MOCA and prepolymer are with 0.9 NH
2The mol ratio of/NCO is carried out hybrid reaction, and mixing temperature is 75 ℃～85 ℃, and the goods curing temperature is 100 ℃～120 ℃, vulcanizes the demoulding in 60 minutes, and 90 ℃～110 ℃ postcure 10 hours, obtaining hardness was the polyurethane elastomer goods of Shao Shi 85A.
The making of surface layer structure:
1. polyurethane prepolymer, use tolylene diisocyanate (TDI-100) 11.9%, it is 2.4% prepolymer that the polyester diol CMA-2478.1% of molecular weight 2000 and plasticizer phthalic acid butyl ester (DBP) 10% obtained isocyano-content in 3 hours 75 ℃～85 ℃ reactions.
2. solidifying agent is selected from 3,5-dimethythiotoluene diamine (E-300)
3. the making of polyurethane elastomer: solidifying agent E-300 and prepolymer are with 0.9 NH
2The mol ratio of/NCO is carried out hybrid reaction, and mixing temperature is 75 ℃～85 ℃, and the goods curing temperature is 100 ℃～120 ℃, vulcanizes the demoulding in 40 minutes, and 90 ℃～110 ℃ postcure 9 hours, obtaining hardness was the polyurethane elastomer goods of Shao Shi 60A.
Embodiment 3
The making of infrastructure:
1. polyurethane prepolymer, it is 4.0% prepolymer that the PTMG dibasic alcohol PTMG200040% that uses the PTMG dibasic alcohol PTMG100041% of tolylene diisocyanate (TDI-100) 19% and molecular weight 1000 and molecular weight 2000 obtained isocyano-content in 3 hours 75 ℃～85 ℃ reactions.
2. solidifying agent is selected from 3,3 ˊ-two chloro-, 4,4 ˊ-diaminodiphenyl-methane (MOCA)
3. the making of polyurethane elastomer: solidifying agent MOCA and prepolymer are with 0.9 NH
2The mol ratio of/NCO is carried out hybrid reaction, and mixing temperature is 75 ℃～85 ℃, and the goods curing temperature is 100 ℃～120 ℃, vulcanizes the demoulding in 30 minutes, and 90 ℃～110 ℃ postcure 10 hours, obtaining hardness was the polyurethane elastomer goods of Shao Shi 90A.
The making of surface layer structure:
1. polyurethane prepolymer, use tolylene diisocyanate (TDI-100) 12.7%, it is 2.8% prepolymer that the polyester diol POL-125682.3% of molecular weight 2000 and plasticizer phthalic acid dimethoxy ethyl ester 5% obtained isocyano-content in 3 hours 75 ℃～85 ℃ reactions.
2. solidifying agent is selected from 3,5-dimethythiotoluene diamine (E-300)
3. the making of polyurethane elastomer: solidifying agent E-300 and prepolymer are with 0.9 NH
2The mol ratio of/NCO is carried out hybrid reaction, and mixing temperature is 75 ℃～85 ℃, and the goods curing temperature is 100 ℃～120 ℃, vulcanizes the demoulding in 40 minutes, and 90 ℃～110 ℃ postcure 9 hours, obtaining hardness was the polyurethane elastomer goods of Shao Shi 65A.
Embodiment 4
The making of infrastructure:
1. polyurethane prepolymer, it is 5.5% prepolymer that the PTMG dibasic alcohol 75.4% that uses tolylene diisocyanate (TDI-100) 24.6% and molecular weight 1000 obtained isocyano-content in 3 hours 75 ℃～85 ℃ reactions.
2. solidifying agent is selected from 3,3 ˊ-two chloro-, 4,4 ˊ-diaminodiphenyl-methane (MOCA)
3. the making of polyurethane elastomer: solidifying agent MOCA and prepolymer are with 0.9 NH
2The mol ratio of/NCO is carried out hybrid reaction, and mixing temperature is 75 ℃ ℃, and the goods curing temperature is 100 ℃～120 ℃, vulcanizes the demoulding in 60 minutes, and 90 ℃～110 ℃ postcure 10 hours, obtaining hardness was the polyurethane elastomer goods of Shao Shi 94A.
The making of surface layer structure:
1. polyurethane prepolymer uses tolylene diisocyanate (TDI-100) 13%, the polyester diol ODX-21887% of molecular weight 2000, and obtaining isocyano-content in 3 hours 75 ℃～85 ℃ reactions is 2.6% prepolymer.
2. solidifying agent is selected from 3,5-dimethythiotoluene diamine (E-300)
3. the making of polyurethane elastomer: solidifying agent E-300 and prepolymer are with 0.9 NH
2The mol ratio of/NCO is carried out hybrid reaction, and mixing temperature is 85 ℃, and the goods curing temperature is 100 ℃～120 ℃, vulcanizes the demoulding in 30 minutes, and 90 ℃～110 ℃ postcure 8 hours, obtaining hardness was the polyurethane elastomer goods of Shao Shi 65A.
Polyurethane elastomer product properties such as following table:
Claims (9)
1. a preparation method who is used for industrial Timing Belt polyurethane elastomeric compositions is characterized in that being composited by bottom and two kinds of different hardness polyurethane elastomers of surface layer, and its making method may further comprise the steps:
⑴ the preparation method of bottom:
1. polyurethane prepolymer uses tolylene diisocyanate and polytetrahydrofuran ethoxylated polyhydric alcohol 75 ℃～85 ℃ reactions 3 hours, the vacuum removal bubble, sampling detects isocyanate content, detect qualified after, airtight saving backup;
2. solidifying agent is selected from 3,3 ˊ-two chloro-, 4,4 ˊ-diaminodiphenyl-methane, 3,5-dimethythiotoluene diamine or their mixture;
3. the making of polyurethane elastomer: solidifying agent and prepolymer are with NH
2The mol ratio of/NCO is 0.9 to carry out hybrid reaction, and mixing temperature is 75 ℃～85 ℃, and the goods curing temperature is 100 ℃～120 ℃, vulcanizes the demoulding in 30～60 minutes, 90 ℃～110 ℃ postcure 8～10 hours, obtains bottom polyurethane elastomer goods;
⑵ the making method of surface layer
1. polyurethane prepolymer uses tolylene diisocyanate, the pure and mild softening agent of polyester polyols 75 ℃～85 ℃ reactions 3 hours, the vacuum removal bubble, sampling detects isocyanate content, detect qualified after, airtight saving backup;
2. solidifying agent is 3,5-dimethythiotoluene diamine;
3. the making of polyurethane elastomer: solidifying agent and prepolymer are with NH
2The mol ratio of/NCO is 0.9 to carry out hybrid reaction, and mixing temperature is 75 ℃～85 ℃, and the goods curing temperature is 100 ℃～120 ℃, vulcanizes the demoulding in 30～60 minutes, 90 ℃～110 ℃ postcure 8～10 hours, obtains surface layer polyurethane elastomer goods.
2. described preparation method for industrial Timing Belt polyurethane elastomeric compositions according to claim 1, it is characterized in that, the hardness of described two kinds of different hardness polyurethane elastomers is respectively: bottom polyurethane elastomer Shao Shi 80 ~ 94A and surface layer polyurethane elastomer goods are Shao Shi 55 ~ 65A.
3. described preparation method for industrial Timing Belt polyurethane elastomeric compositions according to claim 1 is characterized in that, polytetrahydrofuran ethoxylated polyhydric alcohol functionality is 2, and number-average molecular weight is 1000～2000.
4. described preparation method for industrial Timing Belt polyurethane elastomeric compositions according to claim 1, it is characterized in that, polyester polyol is that the synthetic molecular weight of hexanodioic acid, ethylene glycol, Diethylene Glycol, butyleneglycol, propylene glycol or their mixture is 2000 polymkeric substance.
5. described preparation method for industrial Timing Belt polyurethane elastomeric compositions according to claim 1 is characterized in that, tolylene diisocyanate is the 2,4 toluene diisocyanate that contains more than 98%.
6. described preparation method for industrial Timing Belt polyurethane elastomeric compositions according to claim 1, it is characterized in that, softening agent is dimethyl phthalate, diethyl phthalate, dibutyl phthalate, phthalic acid two butyl benzyls or Dimethoxyethyl phthalate.
7. described preparation method for industrial Timing Belt polyurethane elastomeric compositions according to claim 1, it is characterized in that, tolylene diisocyanate and polytetrahydrofuran ethoxylated polyhydric alcohol account for respectively 13.8%～24.6% and 75.4%～86.2% of both total masses among the preparation method of bottom.
8. described preparation method for industrial Timing Belt polyurethane elastomeric compositions according to claim 1, it is characterized in that, tolylene diisocyanate, the pure and mild softening agent of polyester polyols account for respectively 11.3%～13%, 77%～87% and 0 ~ 10% of three's total mass in the making method of surface layer.
9. described preparation method for industrial Timing Belt polyurethane elastomeric compositions according to claim 1, it is characterized in that, described hardness is that the polyurethane elastomer of Shao Shi 80 ~ 90A adopts the polyether(poly)urethane elastomerics as infrastructure, and described hardness to be the polyurethane elastomer of Shao Shi 55 ~ 65A adopt the PAUR elastomerics as surface layer structure, and bottom and surface layer mutually bond and form.
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Cited By (5)
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| CN103483541A (en) * | 2013-08-19 | 2014-01-01 | 淄博启明星新材料有限公司 | Polyurethane elastomer printing rubber roller and preparation method thereof |
| CN103524705A (en) * | 2013-10-29 | 2014-01-22 | 广东石油化工学院 | Preparation method for polyurethane elastomers |
| CN106496506A (en) * | 2016-11-04 | 2017-03-15 | 淄博华天橡塑科技有限公司 | Polyurethane elastomer transparent gross rubber for agricultural automobile electromotor shock bracket and preparation method thereof |
| CN106753157A (en) * | 2017-01-17 | 2017-05-31 | 深圳市力信陆南橡塑五金有限公司 | A kind of excellent power glue performed polymer of fire-resistant antistatic polyurethane and preparation method thereof |
| CN106810669A (en) * | 2017-01-17 | 2017-06-09 | 深圳市力信陆南橡塑五金有限公司 | A kind of excellent power glue performed polymer of flame retardant polyurethane and preparation method thereof |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103483541A (en) * | 2013-08-19 | 2014-01-01 | 淄博启明星新材料有限公司 | Polyurethane elastomer printing rubber roller and preparation method thereof |
| CN103483541B (en) * | 2013-08-19 | 2015-12-23 | 淄博启明星新材料有限公司 | Polyurethane elastomer printing rubber roll and preparation method thereof |
| CN103524705A (en) * | 2013-10-29 | 2014-01-22 | 广东石油化工学院 | Preparation method for polyurethane elastomers |
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| CN106496506A (en) * | 2016-11-04 | 2017-03-15 | 淄博华天橡塑科技有限公司 | Polyurethane elastomer transparent gross rubber for agricultural automobile electromotor shock bracket and preparation method thereof |
| CN106753157A (en) * | 2017-01-17 | 2017-05-31 | 深圳市力信陆南橡塑五金有限公司 | A kind of excellent power glue performed polymer of fire-resistant antistatic polyurethane and preparation method thereof |
| CN106810669A (en) * | 2017-01-17 | 2017-06-09 | 深圳市力信陆南橡塑五金有限公司 | A kind of excellent power glue performed polymer of flame retardant polyurethane and preparation method thereof |
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