Product name: DMDPB
Chemical Name: 2,3-Dimethyl-2,3-diphenylbutane
Molecular formula: C18H22
Molecular weight: 238.4
CAS No.: 1889-67-4
EINECS/ELINCS No.: 217-568-2
Half-life data
The activity of the C-C initiating bond is usually conferred by its half-life at different temperatures. The half life of DMDPB in chlorobenzene is as follows:
0.1 hr at 284°C (543°F)
1 hr at 259°C (498°F)
10 hr at 237°C (459°F)
Application:
As a new type of polymer additive, FARIDA DMDPB can be used as a synergist for flame retardants, as a catalyst or initiator for cross-linking or graft copolymerization of polymeric materials, and is widely used to improve polymer materials (polyolefins, acrylates, Properties of polycarbonate, polyether, etc.).
What is the role of plasticizer and dibutyl in building waterproof coatings
The functions of plasticizer and dibutyl in building waterproof coating are as follows:
1. Plasticizer, also known as dioctyl ester, is used to plasticize, which can improve the flexibility and low-temperature performance of film-forming, and improve the compactness of waterproof coating.
2. Dibutyl ester is mainly used as auxiliary plasticizer of polyvinyl chloride. Compared with dioctyl ester, dibutyl ester is easy to migrate and is often used in combination with dioctyl ester to reduce the addition cost of plasticizer.
plasticizer (Plasticizer) is a kind of polymer material additive, and it is also a phthalate ester in environmental estrogen. It has a wide variety, and the common variety is DEHP. DEHP chemical name di (2-ethylhexyl) phthalate, is a colorless, odorless liquid, widely used in industry. Plasticizer is a polymer material additive widely used in industry. Adding this substance in plastic processing can enhance its flexibility and easy processing.
The significance and function of rubber blending are briefly described
The significance of rubber blending is to improve the process performance, service performance and technical and economic performance. More than 70% of rubber is processed and used in the form of rubber or rubber and plastic.
The process compatibility of rubber, through mechanical methods or other conditions, the thermodynamic incompatible system can be mixed to obtain a sufficiently stable blend, which forms a multiphase morphology in the micro region, but still maintains its uniformity in the macro.
Factors affecting polymer blending:
Mixing process conditions: time, strength, roll temperature, processing method
Formula composition: raw rubber, blending ratio, compatibilizer, processing aids
[all kinds of rubber are used together]
1, Natural rubber + CIS polybutadiene rubber
Nr+br ratio: 75 ~ 50 / 25 ~ 50
Objective: to improve the vulcanization temperature, heat resistance, cold resistance, elasticity and wear resistance
Products: conveyor belt, rubber shoes
2, Natural rubber + styrene butadiene rubber
Nr+sbr ratio: any
Objective: to improve the wear resistance of NR, which can be used in tire tread to improve the ozone cracking resistance of tread grooves
Products: tires and other products
3, SBR + CIS butadiene rubber sbr+br ratio: any
Objective: to improve wear resistance, elasticity and cold resistance
Product: tread
4, Styrene butadiene rubber + high styrene
Sbr+ high styrene ratio: 75 ~ 50 / 25 ~ 50
Objective: to improve wear resistance, tear strength and tensile strength
Product: sole and sponge glue
5, Styrene butadiene rubber + high density polyethylene
Sbr+hdpe ratio: 100 / 5 ~ 20
Objective: to improve the process performance, reduce the scorch tendency and shrinkage of rubber compound, and improve the wear resistance and ozone resistance of vulcanizate
Product: sole and sponge glue
6, Ethylene propylene rubber + butyl rubber
Epdm+iir ratio: 50/50
Objective: to improve tear resistance, heat resistance and ozone resistance; Improve the wear resistance of tread
Products: tread, inner tube, etc
7, Ethylene propylene rubber + chlorinated butyl rubber
Epdm+ciir ratio: 50/50
Objective: to improve ozone resistance
Product: sidewall
8, Butadiene rubber + ethylene propylene rubber butadiene rubber +epdm
Proportion: any purpose: to improve heat resistance, ozone resistance and chemical resistance
Product: tread
9, Nitrile rubber +pvc nbr+pvc
Scale: any
Objective: to maintain the oil resistance and heat resistance of NBR; Improve ozone resistance, wear resistance, flame resistance and dielectric properties
Products: oil resistant tape, shoes, hose, thread cover
10, Nbr+ phenolic resin ratio: any
Objective: to improve the viscosity, hardness, wear resistance and strength of NBR
Product: gasket, lining
11, Nitrile rubber + natural rubber or styrene butadiene rubber
Nbr+nr or SBR ratio: NR or SBR ≤ 40%
Objective: to improve the cold resistance and reduce the cost of NBR, but other properties of NBR are slightly reduced
Product: oil resistant sole, leather bowl
12, Nitrile rubber + neoprene nbr+cr
Scale: any
Objective: to improve weather resistance and ozone resistance
Product: outdoor oil resistant products
13, Nitrile rubber + ethylene propylene rubber nbr+epdm
Objective: to improve weather resistance and ozone resistance
14, Cr+nr ratio of neoprene + natural rubber: 80/20
Objective: to improve the technological performance of CR
Product: conveyor belt or covering glue
15, Neoprene + nitrile rubber
Cr+nbr ratio: any
Objective: to improve the roll sticking, extrusion, calendering and oil resistance of CR
16, Neoprene + CIS polybutadiene rubber
Cr+br ratio: 90 ~ 60 / 10 ~ 40
Objective: to improve the cold resistance, wear resistance and elasticity of Cr, and significantly improve its processing properties such as extrusion, calendering, roller sticking, scorching, etc
Product: adhesive tape, shock-absorbing rubber
Applications
Why Choose Us
Factory Scale
Changsha Zhongyi Chemical Co., Ltd. is a chemical additives company specializing in serving the fields of rubber, plastics and so on. The company is mainly engaged in TGIC curing agent; Gm3701, Si69, 171, 172, 550, 560, 570 and other silane coupling agents; BIPB, DCP, dhbp, tmch335 crosslinking agent; BPO, TbpB initiator and other peroxide series products; TAIC, TAC, TMPTMA vulcanization accelerators, antioxidants, TEP expanded microspheres, synergists, TBC flame retardants, SC sodium cyanate pharmaceutical intermediates, essence, polymer enhancers, foaming agents, plasticizers, fluorescent brighteners, solid degradation agents, UV irradiation crosslinkers and other products. Its products have passed IS09001 (2015) international quality system certification and ISO14001 (2015) international environmental management system certification. The products are mainly used in: CPE EPDM wires and cables, automotive rubber parts, EVA soles, floor mats and other sports materials, solar photovoltaic cell packaging films, thermoplastic plastics and resins, flame retardant textiles, flame retardant PP, flame retardant XPS, EPS, rubber conveyor belts, polymer material modification, pharmaceutical and pesticide intermediates, glass fibers, paint coatings, steel heat treatment, mining gold extraction and other fields.
The company will follow the policy of "professionalism, pragmatism, innovation, high quality and efficiency", seize opportunities, meet challenges and make new contributions to accelerating the development of China's chemical industry! Our aim is to serve our customers with professional standards, excellent product quality and considerate and perfect service.
The company pursues development through science and technology, survival through quality, and satisfaction through professional services. We are willing to work with colleagues in chemical industry and people of insight from all walks of life for common development and hand in hand; Always take "honesty and trustworthiness, quality assurance, customer first, high-quality service" as the goal, and realize "win-win interests, seek common development, and keep pace with the times" with merchants as its own responsibility, and make greater contributions to the country's economic take-off!
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