Unlock instant, AI-driven research and patent intelligence for your innovation.

A polyolefin type polyurethane elastomer toughened polystyrene blend material and preparation method thereof

A polyurethane elastomer and polystyrene technology, applied in the field of polymer materials, can solve the problems of poor compatibility, poor tolerance, poor morphology stability, etc., and achieve good toughness, high strength and modulus, and simple preparation. Effect

Active Publication Date: 2021-02-05
汕头市广油美联新材料研究院有限公司
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this kind of polyurethane can greatly improve the brittleness of polystyrene, it is found through scanning electron microscopy that the compatibility between polyurethane and polystyrene is not good, and the material will be affected by the force between polystyrene and polyurethane. Premature fracture occurs due to poor interfacial bonding strength; experimental research on polyurethane / polystyrene interpenetrating network membrane. Shandong Chemical Industry, (2): 4-7 (2002) discloses a method using PS-maleic acid (MA) was used as a solubilizer to prepare blended materials with higher impact strength than PS
However, due to the poor compatibility between them and the low bonding energy between the phase interfaces, most of the obtained two-phase structural systems are prone to phase separation under certain conditions. As a result, the physical and chemical properties of the blended material cannot be fully reflected, the shape stability is poor, and its impact performance increases little, sometimes even lower than that of unmodified polystyrene.
Therefore, how to effectively use polyurethane toughened modified polystyrene resin to prepare polystyrene blend materials with molecular-level dispersion and matching scale, so that its existing and potential excellent performance can be fully reflected. There are not many patents published

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A polyolefin type polyurethane elastomer toughened polystyrene blend material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041]Weigh 5.86 g of HTPB (water removed) into a three-necked flask, add weighed 3.07 g of TDI, stir at 60 °C, make it fully mixed for 30 min, then add the weighed styrene monomer (relative to the total 10% of the amount), continue to stir for 30 min, raise the temperature to 80 °C, react for 2 h, add a weighed chain extender and react for 30 min to prepare the styrene-polyurethane prepolymer glue; then add the remaining Using 189 g of styrene monomer and an appropriate amount of initiator, under the protection of nitrogen, the prepolymerization temperature was 100 °C, the stirring speed was 150 rpm, and the prepolymerization reaction lasted for 120 min to obtain the prepolymerization product. Under nitrogen protection, the final polymerization reaction temperature was 140 °C, the rotation speed was 50 rpm, and the final polymerization reaction lasted for 120 min to obtain the final polymerization reaction product. The final polymerization reaction product was devolatilized u...

Embodiment 2

[0043] Weigh 17.6 g of HTPB (water removed) into a three-necked flask, add weighed 9.24 g of TDI, stir at 60 °C, make it fully mixed for 30 min, then add the weighed styrene monomer (relative to the total 10% to 15% of the weight), continue to stir for 30 min, raise the temperature to 80 °C, react for 2 h, add a weighed chain extender and react for 30 min to prepare the styrene-polyurethane prepolymer glue; then The remaining 167 g of styrene monomer and an appropriate amount of initiator were added. Under the protection of nitrogen, the prepolymerization temperature was 100 °C, the stirring speed was 150 rpm, and the prepolymerization reaction lasted for 120 min to obtain a prepolymerization product. Under nitrogen protection, the final polymerization reaction temperature was 140 °C, the rotation speed was 50 rpm, and the final polymerization reaction lasted for 120 min to obtain the final polymerization reaction product. The final polymerization reaction product was devolati...

Embodiment 3

[0045] Weigh 9.75 g of HTPB (water removed) into a three-necked flask, add weighed 5.14 g of TDI, stir at 60 °C, make it fully mixed for 30 min, then add the weighed styrene monomer (relative to the total 10% to 15% of the weight), continue to stir for 30 min, raise the temperature to 80 °C, react for 2 h, add a weighed chain extender and react for 30 min to prepare the styrene-polyurethane prepolymer glue; then The remaining 148.5 g of styrene monomer and an appropriate amount of initiator were added. Under the protection of nitrogen, the prepolymerization temperature was 100 °C, the stirring speed was 150 rpm, and the prepolymerization reaction continued for 120 min to obtain a prepolymerization product. Under nitrogen protection, the final polymerization reaction temperature was 140 °C, the rotation speed was 50 rpm, and the final polymerization reaction lasted for 120 min to obtain the final polymerization reaction product. The final polymerization reaction product was dev...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a polyolefin type polyurethane elastomer toughened polystyrene blend material and a preparation method thereof. The mass percentage of its components is: styrene, initiator, polyolefin polyol, diisocyanate and diamine chain extender, etc.; its preparation steps include: mixing styrene-polyolefin type polyurethane glue; adding the remaining benzene Vinyl monomer; adding bifunctional initiator; prepolymerization; final polymerization; devolatilization; recovery of devolatilized styrene monomer. The present invention partially cross-links the double bonds of polyethylene and polyolefin through an initiator to form a blend material similar to a plastic alloy, which has good impact properties, especially high notched impact strength, and the method of the present invention can Condensation recovery of unreacted styrene has simple process and low cost, and the obtained impact-resistant polystyrene blend material product has excellent physical and mechanical properties and good processing performance.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a polyolefin type polyurethane elastomer toughened polystyrene blend material and a preparation method thereof. Background technique [0002] Polystyrene (PS) is one of the earliest industrialized synthetic resins. It has good transparency, dimensional stability, processing fluidity, etc., and is widely used in engineering, automobile industry, household appliances and other fields, and has been widely used, and has attracted great attention from users. However, due to its hard and brittle quality and low mechanical strength, its application fields are limited and can only be used in low-grade products. For this reason, since the first industrialized production in the last century, polystyrene has undergone many developments, such as the copolymerization of styrene and polar monomers such as acrylonitrile, methacrylate or maleate, using different Rubber or styrene-butadiene blo...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C08L25/06C08L75/14C08G18/76C08G18/69C08F112/08C08F4/34
CPCC08F4/34C08F112/08C08G18/69C08G18/7614C08L25/06C08L2312/00C08L75/14
Inventor 徐井水黄伟汕张朝益
Owner 汕头市广油美联新材料研究院有限公司