TDI polyurethane prepolymers muaj kev ua haujlwm zoo heev thiab tshuaj lom neeg hauv ntau daim ntawv thov.

TDI polyurethane prepolymers yog tsim los ntawm ib nrab reacting TDI nrog ntau hom polyols (xws li polyester los yog polyether polyols), uas ua rau ib yam khoom uas muaj ib co ntawm cov dawb isocyanate (NCO) cov ntsiab lus. Qhov no tso cai rau kev sib txuas ntxiv los yog kev cuam tshuam thaum ua tiav tom qab. TDI prepolymers feem ntau yog ua kua los yog khov, thiab lawv lub cev tshwj xeeb yog nyob ntawm NCO cov ntsiab lus thiab hom polyol siv.

Yam ntxwv

1. High Reactivity: Cov pab pawg isocyanate hauv TDI prepolymers tuaj yeem hnov mob nrog dej, cawv, thiab lwm yam tshuaj los tsim ib lub network polyurethane.
2. Zoo heev hnav tsis kam thiab elasticity: TDI-raws li polyurethane muaj zoo heev hnav tsis kam, tsim kua muag lub zog, thiab elasticity, ua rau nws haum rau xav tau kev siv tshuab.
3. Adjustable Hardness: Los ntawm kev kho cov ntsiab lus NCO nyob rau hauv lub prepolymer thiab hom polyol reacted, qhov kawg khoom hardness thiab lwm yam mechanical zog yuav haum.
4. Chemical Resistance: TDI-raws li polyurethane ua pov thawj zoo rau cov roj, roj, thiab ntau yam tshuaj.

Cov khoom

TSIS MUAJ.	1	2	3	4	5	6	7	8	9	10	11
Hom	Polyester/TDI system					Polyether/TDI system			PTMEG/TDI system
Qauv	wb 8341	qw 8026	qw 8315	qw 8035	qw 8317	qw 8308	qw 8311	qw 8306	qw 8319	qw 8235	1260
NCO content %	2.1±0.2	2.6±0.2	3.0±0.2	3.5±0.2	5.0±0.2	4.5±0.2	6.5±0.2	3.0±0.2	3.0±0.2	3.5±0.2	6.0±0.2
Qhov ntsuas kub ntawm 20 degree	Dawb av	Dawb av	Dawb av	Dawb av	Dawb av	Colorless pob tshab kua	Colorless pob tshab kua	Colorless pob tshab kua	Dawb waxy khoom	Dawb waxy khoom	dawb waxy khoom
Hardener	MOCA	MOCA	MOCA	MOCA	MOCA	MOCA	MOCA	MOCA	MOCA	MOCA	MOCA
100g prepolymer curing agent ntau npaum li cas (g)	6.2	7.7	8.8	10.3	14.8	13.3	19.2	8.8	8.8	10.3	17.7
Prepolymer / curing tus neeg saib xyuas qhov kub thiab txias (degree)	85/120	85/120	85/120	80/120	80/120	80/120	75/120	80/120	80/120	80/120	75/120
viscosity ntawm 85 degree (mpa·s)	3000	2600	2000	1600	1100	350	270	350	1200	800	500
Lub sijhawm gel (min)	13-18	13-17	12-16	10-15	6-10	12	8	6-10	12-17	11-15	7-10
Tom qab kho lub sijhawm (100 degree / h)	16	16	16	16	16	16	16	16	16	16	16
Hardness (Shore A)	70±2	75±2	80±2	87±2	94±2	85±2	95±2	73±2	80±2	85±2	95±2
Tensile zog (mpa)	42	43	45	46	47	25	35	8	28	32	45
100% modulus stress (mpa)	2.5	3.5	3.7	4.1	8	6	10	2	5	6	11
300% modulus kev ntxhov siab (mpa)	4	5.5	7	8	16	10	16	5	8	10	23
Elongation ntawm tawg (%)	850	720	680	660	500	500	380	650	580	550	400
Lub kaum sab xis Tear Strength (kN/m)	50	58	72	80	105	60	95	45	63	70	110
Lub cev muaj zog (kN / m)	18	22	32	40	46	18	25	12	20	25	35
Rov qab (%)	43	40	38	35	32	27	22	48	55	50	43
Qhov ceev ntawm 25 degree (g / cm3)	1.2	1.23	1.25	1.25	1.25	1.1	1.18	1.08	1.08	1.1	1.13
DIN hnav (mm3)	50	48	45	43	45	120	110	130	45	44	44

Daim ntawv thov

TDI polyurethane prepolymer yog dav siv nyob rau hauv ntau yam kev lag luam:

1. Elastomers: TDI prepolymers feem ntau yog siv rau hauv kev tsim cov polyurethane elastomers, xws li industrial rollers, conveyor siv, thiab shock absorbers, qhov siab hnav tsis kam thiab muaj zog mechanical zog.

2. Coatings thiab Adhesives: TDI polyurethane prepolymers feem ntau yog siv los ua cov khoom siv hauv cov txheej txheem thiab cov nplaum, tshwj xeeb tshaj yog nyob rau hauv cov cheeb tsam uas xav tau tshuaj tiv thaiv thiab hnav tsis kam. Lawv tsim nyog rau txheej thiab sib txuas cov hlau, ntoo, yas, thiab lwm yam ntaub ntawv.

3. Sealants: TDI prepolymers nquag siv hauv polyurethane sealant formulations, zoo tagnrho rau kev siv hauv kev tsim kho, tsheb, thiab lwm qhov chaw uas huab cua tsis kam thiab sealing zog yog qhov tseem ceeb.

4. Cov ntaub ntawv khau: Vim nws hnav tsis kam thiab elasticity, TDI prepolymers feem ntau yog siv hauv cov khau khau, tshwj xeeb tshaj yog cov khau kis las.

5. Ua npuas ncauj: Thaum MDI (Methylene Diphenyl Diisocyanate) prepolymers feem ntau yog siv rau hauv cov ntaub ntawv ua npuas ncauj yooj yim, TDI prepolymers kuj tau siv los ua qee cov khoom ua npuas ncauj siab, tshwj xeeb tshaj yog nyob rau hauv cov ntawv thov ua npuas ncauj.