CN106751588A - A kind of high temperature high efficiency initiator modified PBT and preparation method thereof - Google Patents

Abstract

A kind of high temperature high efficiency initiator modified PBT and preparation method thereof, it is related to a kind of PBT and preparation method thereof, the present invention weighs inorganic filler BN and each 50 90 parts of the SiC that particle diameter is 20 40 μm, sequentially add 10 20 parts of the new initiator with condensed cyclic structure, 25 parts of 25 parts of monoalkoxytitanates coupling agent and 560 silane couplers of KH, mix three minutes in high-speed mixer；The inorganic filler that will be mixed puts into extruding pelletization in extruder with 100 parts of PBT, 0.15 part of irgasfos 168,0.15 part of antioxidant 1010,10 30 parts of toughener KT 22, and the processing temperature of extruder is 220 240 DEG C, rotating speed 150r/min.The present invention uses a kind of high temperature resistant new initiator, a kind of and new process, can abundant modified PBT, improve its thermal conductivity factor.This kind of decomposition of initiator temperature is 230 DEG C 280 DEG C, synthesizes low cost, in can be widely applied to the process of modified resins.

Description

A kind of high temperature high efficiency initiator modified PBT and preparation method thereof

Technical field

The present invention relates to a kind of PBT and preparation method thereof, more particularly to a kind of high temperature high efficiency initiator modified PBT and Its preparation method.

Background technology

Polybutylene terephthalate (PBT), English name polybutylene terephthalate（Abbreviation PBT）, belong to poly- Ester series, is by 1.4-pbt butanediols (1.4-Butylene glycol) and terephthalic acid (TPA) (TPA) or terephthalic acid (TPA) Ester (DMT) polycondensation is formed, and translucent to opaque, crystalline thermoplastic polyester tree via the milky that mixing program is made Fat.Thermoplastic polyester, or saturated polyester are referred to as together with PET.Polybutylene terephthalate (PBT) (Polybutylene Terephthalate) it is one of five big general engineering plastics.

PBT has that moisture-proof, high temperature resistant, oil resistant, wear-resisting, resistant to chemical etching, electrical insulation capability are good, hot property is excellent, machinery The advantages of performance and processing characteristics are strong, shaping is fast, leads in auto industry, electronic apparatus, plant equipment and optical cable and optical fiber etc. Domain is widely applied；PBT creeps are smaller, high temperature resistant, and its performance is changed very little under the high temperature conditions；Production PBT is consumed Energy it is minimum in engineering plastics；Heat-resistant aging is excellent.Additionally, outdoor long-term ageing is also fine, unstressed cracking is resistance to Solvent is good；It is easy to fire-retardant, and good with the affine performance of fire retardant, therefore the flame retardant products of PBT are obtained in electronic enterprises Extensive use.

Due to the extensive use of PBT material, therefore the lifting meeting of the functionalization such as thermal diffusion is carried out to PBT on the basis of original Playing very important effect, therefore improve the heat conductivility of PBT turns into a hot issue of current research.Simultaneously because PBT is remained such as notch impact strength is low, the deficiency such as heat conductivility is bad in aspect of performance, and the study on the modification of PBT resins is also One important content of PBT engineering plastics high performances.In order to improve the thermal conductivity factor of PBT, selection is added in PBT matrixes Heat filling, and heat filling is needed to carry out certain treatment, and initiator and coupling agent are added in heat filling.

Than relatively low, such as the decomposition temperature of DTBP is 100-200 DEG C to general decomposition of initiator temperature, and the decomposition temperature of BPO is 102-106 DEG C etc., and the fusing point of PBT resin is between 225-235 DEG C, this results in initiator and is not being reacted with resin extender In the case of just decompose.Present document relates to a kind of resistant to elevated temperatures initiator, among the process for improving PBT thermal conductivity factors, make Macromolecular and the more preferable haptoreaction of inorganic filler, there is extensive market application value.

The content of the invention

It is an object of the invention to provide a kind of high temperature high efficiency initiator modified PBT and preparation method thereof, the present invention draws Hair agent high temperature resistant, can play efficient initiation within PBT fusing points, and building-up process is simple, with low cost.It is modified PBT process is novel, and the compounding of coupling agent can be such that resin is fully contacted with inorganic filler, reaches and improves PBT thermal conductivity factors Purpose..

The purpose of the present invention is achieved through the following technical solutions：

A kind of high temperature high efficiency initiator modified PBT, described matrix PBT（Polybutylene terephthalate (PBT)）；Initiator is band There is the initiator of condensed cyclic structure, structure is as follows：

；

Modified PBT by weight, is constituted：

100 parts of PBT；

Coupling agent 5-10 parts；

Antioxidant 0.2-0.5 parts；

Initiator 10-20 parts；

Toughener 10-30 parts；

Heat filling 50-90 parts.

A kind of described high temperature high efficiency initiator modified PBT, described antioxidant is the one kind or many in 168 or 1010 Kind.

A kind of described high temperature high efficiency initiator modified PBT, described toughener is the one kind in KT-915 or KT-22 Or it is various.

A kind of described high temperature high efficiency initiator modified PBT, described coupling agent is titanate coupling agent 102 or silane One or more in coupling agent.

A kind of described high temperature high efficiency initiator modified PBT, described heat filling is the one kind in BN, AlN, SiC Or it is various.

A kind of high temperature high efficiency initiator modified PBT preparation method, the described method comprises the following steps：

It is that 20-40 μm of inorganic filler BN and SiC is each 50-90 parts to weigh particle diameter, and sequentially add with condensed cyclic structure new draws 2-5 parts of 10-20 parts of agent of hair, 2-5 parts of monoalkoxytitanates coupling agent and KH-560 silane couplers, mix in high-speed mixer Close three minutes；The inorganic filler that will be mixed and 100 parts of PBT, 0.15 part of irgasfos 168,0.15 part of antioxidant 1010,10-30 Extruding pelletization in part toughener KT-22 input extruders, the processing temperature of extruder is 220-240 DEG C, rotating speed 150r/min.

Brief description of the drawings

Fig. 1 is the building-up process with condensed cyclic structure new initiator.

Specific embodiment

With reference to embodiment, the present invention is described in detail.

It is 20-40 μm of each 40 parts of inorganic filler BN and SiC to weigh particle diameter, and sequentially add with condensed cyclic structure new draws 3 parts of 10 parts of agent of hair, 3 parts of monoalkoxytitanates coupling agent and KH-560 silane couplers, mix three points in high-speed mixer Clock.The inorganic filler that will be mixed and 100 parts of PBT, 0.15 part of irgasfos 168,0.15 part of antioxidant 1010,30 parts of toughener Extruding pelletization in KT-22 input extruders, the processing temperature of extruder is 220-240 DEG C, rotating speed 150r/min.Prepare batten. By corresponding standard testing（It is shown in Table 2）Results of property is shown in Table 3.

Table 1：Formula composition (part of embodiment 1-3 and comparative example 1）

Table 2：Mechanics Performance Testing standard

Table 3：The test of PBT in embodiment 1-3

From above-mentioned analysis form, the thermal conductivity factor of PBT rises most when adding new initiator, coupling agent to be compounding Hurry up, and with the bigger rising space, first add titanate coupling agent 102 to improve the saturation degree of filler, it is resistant to elevated temperatures New initiator can play efficient initiation in the melting range of PBT, resin is more fully connect with inorganic filler Touch, and synthesis low cost.This kind of formula of processing method can preferably modified resin, great market application value.

The present invention is further illustrated above by specific embodiment, but these embodiments are only exemplary , any limitation is not constituted to protection scope of the present invention.It will be appreciated by those skilled in the art that without departing from spirit of the invention In the case of protection domain, technical solutions and their implementation methods of the present invention can be carried out various equivalencings, modification or Improve, these all should fall within the scope of protection of the present invention.Protection scope of the present invention is defined by appended claim.

Claims (6)

1. a kind of high temperature high efficiency initiator modified PBT, it is characterised in that：Described matrix PBT（Polybutylene terephthalate Ester）；Initiator is the initiator with condensed cyclic structure, and structure is as follows：

；

Modified PBT by weight, is constituted：

100 parts of PBT；

Coupling agent 5-10 parts；

Antioxidant 0.2-0.5 parts；

Initiator 10-20 parts；

Toughener 10-30 parts；

Heat filling 50-90 parts.

2. a kind of high temperature high efficiency initiator modified PBT according to claim 1, it is characterised in that：Described antioxidant It is one or more in 168 or 1010.

3. a kind of high temperature high efficiency initiator modified PBT according to claim 1, it is characterised in that：Described toughener It is one or more in KT-915 or KT-22.

4. a kind of high temperature high efficiency initiator modified PBT according to claim 1, it is characterised in that：Described coupling agent It is one or more in titanate coupling agent 102 or silane coupler.

5. a kind of high temperature high efficiency initiator modified PBT according to claim 1, it is characterised in that：Described heat conduction is filled out One or more in expecting for BN, AlN, SiC.

6. a kind of high temperature high efficiency initiator modified PBT preparation method, it is characterised in that：The described method comprises the following steps：

It is that 20-40 μm of inorganic filler BN and SiC is each 50-90 parts to weigh particle diameter, and sequentially add with condensed cyclic structure new draws 2-5 parts of 10-20 parts of agent of hair, 2-5 parts of monoalkoxytitanates coupling agent and KH-560 silane couplers, mix in high-speed mixer Close three minutes；The inorganic filler that will be mixed and 100 parts of PBT, 0.15 part of irgasfos 168,0.15 part of antioxidant 1010,10-30 Extruding pelletization in part toughener KT-22 input extruders, the processing temperature of extruder is 220-240 DEG C, rotating speed 150r/min.