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PBT toughening plastic and preparation method thereof

A plastic and toughening technology, which is applied in the field of PBT toughened plastic and its preparation, can solve the problems of low tensile strength and low bending strength of plastic particles, and achieve the effect of simple preparation method and simple and easy-to-obtain raw materials

Inactive Publication Date: 2015-12-23
SUZHOU POLYMER NEW MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The invention provides a PBT toughened plastic with high tensile strength, high bending strength, high impact strength and high elongation at break and a preparation method thereof, which solves the technical problems of low tensile strength and low bending strength of existing plastic particles

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The first step: weigh 100 parts of PBT, 5 parts of calcium stearate, 10 parts of hexanediol, 15 parts of 1,4-butanediol, and 20 parts of diphenylmethane-4,4 diisocyanate according to the proportion of parts by mass , 1 part of calcium carbonate, 25 parts of styrene-butadiene rubber, 5 parts of EVA, 20 parts of GF, 30 parts of EPDM.

[0022] The second step: put calcium stearate and EVA into the reactor and mix for 35min, add PBT, hexanediol, 1,4-butanediol and calcium carbonate, heat up to 70°C, and mix for 50min at a speed of 165r / min.

[0023] The third step: add diphenylmethane-4,4 diisocyanate, styrene-butadiene rubber, EVA, GF and EPDM, mix evenly, put into a twin-screw extruder, and extrude and granulate at a temperature of 190°C.

[0024] The friction coefficient of the product is 0.35, the transverse shrinkage rate is 1%, the longitudinal shrinkage rate is 0.8%, the shrinkage ratio is 1, and the thermal deformation temperature is 245℃; the tensile strength is 65...

Embodiment 2

[0026] The first step: weigh 100 parts of PBT, 25 parts of calcium stearate, 30 parts of hexanediol, 35 parts of 1,4-butanediol, and 40 parts of diphenylmethane-4,4 diisocyanate according to the proportion of parts by mass , 20 parts of calcium carbonate, 45 parts of styrene-butadiene rubber, 25 parts of EVA, 40 parts of GF, 50 parts of EPDM.

[0027] The second step: put calcium stearate and EVA into the reactor and mix for 55min, add PBT, hexanediol, 1,4-butanediol and calcium carbonate, heat up to 90°C, and mix at a speed of 185r / min for 70min.

[0028] The third step: add diphenylmethane-4,4 diisocyanate, styrene-butadiene rubber, EVA, GF and EPDM, mix evenly, put into a twin-screw extruder, and extrude and granulate at 230°C.

[0029] The friction coefficient of the product is 0.3, the transverse shrinkage rate is 1.1%, the longitudinal shrinkage rate is 0.9%, the shrinkage ratio is 1.1, and the thermal deformation temperature is 250℃; the tensile strength is 70MPa, and t...

Embodiment 3

[0031] The first step: weigh 100 parts of PBT, 10 parts of calcium stearate, 15 parts of hexanediol, 20 parts of 1,4-butanediol, and 25 parts of diphenylmethane-4,4 diisocyanate , 5 parts of calcium carbonate, 30 parts of styrene-butadiene rubber, 10 parts of EVA, 25 parts of GF, and 35 parts of EPDM.

[0032] The second step: put calcium stearate and EVA into the reactor and mix for 35min, add PBT, hexanediol, 1,4-butanediol and calcium carbonate, heat up to 70°C, and mix for 50min at a speed of 165r / min.

[0033] The third step: add diphenylmethane-4,4 diisocyanate, styrene-butadiene rubber, EVA, GF and EPDM, mix evenly, put into a twin-screw extruder, and extrude and granulate at a temperature of 190°C.

[0034]The friction coefficient of the product is 0.25, the transverse shrinkage rate is 1.2%, the longitudinal shrinkage rate is 1%, the shrinkage ratio is 1.2, and the thermal deformation temperature is 255℃; the tensile strength is 75MPa, and the impact strength is 55kJ / ...

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Abstract

The invention discloses a PBT toughening plastic and a preparation method thereof. The PBT toughening plastic is prepared from PBT, calcium stearate, glycol, 1, 4-butanediol, diphenyl methane-4, 4 diisocyanate, calcium carbonate, styrene-butadiene rubber, EVA, GF and EPDM. The friction coefficient of a product is 0.15-0.35, the transverse shrinkage rate 1-1.4%, the longitudinal shrinkage rate is 0.8-1.2%, the shrinkage ratio is 1-1.4, thermal deformation temperature is 245-265 DEG C, the tensile strength is 65-85 MPa, the impact strength is 45-65 KL / m<2> and is improved by more than 40 times compared with the impact strength of pure PBT, the elongation at break is 400-600%, the bending strength is 40-60 MPa, and the Shore hardness is 55-65 D.

Description

technical field [0001] The invention relates to the technical field of plastics, in particular to a PBT toughened plastic and a preparation method thereof. Background technique [0002] Plastic particles, commonly known as plastic particles, are raw materials for storage, transportation and processing of plastics in the form of semi-finished products. Plastic is a kind of polymer material. 1,4-butanediol, propylene, chloro-1,4-butanediol, benzene-1,4-butanediol, etc. can be prepared from petroleum. The molecules of these substances are in a certain Under certain conditions, they can react with each other to form compounds with large molecular weight, that is, macromolecules. [0003] The most prominent property of polypropylene is its versatility, which is suitable for many processing methods and uses. Its value and versatility mainly come from its excellent chemical resistance, the lowest density and highest melting point among all thermoplastics, and moderate cost. [0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L9/06C08L23/08C08L23/16C08K13/04C08K7/14C08K5/098C08K5/053C08K3/26B29C47/92B29C48/92
Inventor 翟红波杨振枢韦洪屹
Owner SUZHOU POLYMER NEW MATERIALS TECH