Chemically modified high-efficiency heat-resistant ASA graft copolymer and preparation method thereof

A graft copolymer and chemical modification technology, which is applied in the field of chemical synthesis and modification of new materials, can solve the problems of low modification efficiency of ASA copolymer, product impact, and large appearance impact, and achieve high impact performance and improved heat resistance. Sexual, method simple effect

Active Publication Date: 2019-04-23
SICHUAN COREMER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem solved by the present invention is to provide a method for preparing a chemically modified high-efficiency heat-resistant ASA graft copolymer, which solves the problem of low modification efficiency of the ASA copolymer in the prior art and great impact on product impact and appearance. question

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  • Chemically modified high-efficiency heat-resistant ASA graft copolymer and preparation method thereof
  • Chemically modified high-efficiency heat-resistant ASA graft copolymer and preparation method thereof
  • Chemically modified high-efficiency heat-resistant ASA graft copolymer and preparation method thereof

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Embodiment 1

[0038] This embodiment discloses the preparation of the ASA graft copolymer of the present invention, specifically:

[0039] Step 1. Preparation of silicone pre-emulsion: Add 30 g of trimethyltriphenylcyclotrisiloxane, 0.3 g of dialkoxysiloxane, methacryloxypropyl trimethoxysilane to the reactor 0.5g, 2g of sodium dodecylsulfonate, 150g of deionized water, stirred at room temperature for 40min, then placed in an emulsifier and emulsified at a speed of 6000r / min for 5min to obtain a silicone pre-emulsion;

[0040] Add 50g of deionized water into a reactor with a stirrer and stir, and raise the temperature to 60°C, continuously drop the pre-prepared silicone pre-emulsion, drop it at a uniform speed until complete, then raise the temperature to 90°C, and react for 4h to obtain Silicone emulsion;

[0041] Step 2. Preparation of PBA base latex: add 10 g of the silicone emulsion obtained in step 1 to the reactor equipped with a stirrer, and then add 100 g of deionized water, 0.3 g ...

Embodiment 2

[0046]Step 1. Preparation of silicone pre-emulsion: Add 30 g of trimethyltriphenylcyclotrisiloxane, 0.3 g of dialkoxysiloxane, methacryloxypropyl trimethoxysilane to the reactor 0.5g, 2g of sodium dodecylsulfonate, 150g of deionized water, stirred at room temperature for 40min, then placed in an emulsifier and emulsified at a speed of 6000r / min for 5min to obtain a silicone pre-emulsion;

[0047] Add 50g of deionized water into a reactor with a stirrer and stir, and raise the temperature to 60°C, continuously drop the pre-prepared silicone pre-emulsion, drop it at a uniform speed until complete, then raise the temperature to 90°C, and react for 4h to obtain Silicone emulsion;

[0048] Step 2. Preparation of PBA base latex: add 20 g of the silicone emulsion obtained in step 1 to the reactor equipped with a stirrer, then add 100 g of deionized water, 0.3 g of sodium dodecylsulfonate, and 1 g of potassium persulfate , stirred, and the temperature was raised to 60°C, and the pre-...

Embodiment 3

[0053] Step 1. Preparation of silicone pre-emulsion: Add 30 g of trimethyltriphenylcyclotrisiloxane, 0.3 g of dialkoxysiloxane, methacryloxypropyl trimethoxysilane to the reactor 0.5g, 2g of sodium dodecylsulfonate, 150g of deionized water, stirred at room temperature for 40min, then placed in an emulsifier and emulsified at a speed of 6000r / min for 5min to obtain a silicone pre-emulsion;

[0054] Add 50g of deionized water into a reactor with a stirrer and stir, and raise the temperature to 60°C, continuously drop the pre-prepared silicone pre-emulsion, drop it at a uniform speed until complete, then raise the temperature to 90°C, and react for 4h to obtain Silicone emulsion;

[0055] Step 2. Prepare PBA base latex: add 30 g of the silicone emulsion obtained in step 1 to the reactor equipped with a stirrer, then add 100 g of deionized water, 0.3 g of sodium dodecylsulfonate, and 1 g of potassium persulfate , stirred, and the temperature was raised to 60°C, and the pre-prepar...

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Abstract

The invention discloses a chemically modified high-efficiency heat-resistant ASA graft copolymer and a preparation method thereof, which solves the problems of low modification efficiency of ASA copolymers and great influence for product impact, appearance and the like in the prior art. The invention relates to a preparation method of a chemically modified high-efficiency heat-resistant ASA graftcopolymer. The preparation method comprises the following steps: taking cross-linked phenyl silicone rubber emulsion as seeds, coating the cross-linked phenyl silicone rubber emulsion with acrylate rubber, and grafting styrene and acrylonitrile to prepare the ASA graft copolymer; the phenyl silicone rubber has acrylate groups, and the phenyl silicone rubber accounts for 10 to 40 percent of the ASAgraft copolymer. The chemically modified high-efficiency heat-resistant ASA graft copolymer is scientific in design, simple in method, simple in operation, and capable of remarkably improving the heat resistance of the ASA copolymer; and moreover, the heat-resisting system is more stable, higher in efficiency and good in toughness, and the appearance of materials is not influenced.

Description

technical field [0001] The invention belongs to the technical field of chemically synthesized modified new materials, and in particular relates to a chemically modified high-efficiency heat-resistant ASA graft copolymer and a preparation method thereof. Background technique [0002] Acrylonitrile-styrene-acrylate copolymer has excellent formability, weather resistance, and good toughness, but its heat resistance is poor, which cannot meet the needs of some high heat resistance applications. In the prior art, the heat resistance of the product is basically improved by adding a heat-resistant modifier during the physical blending process, but the modification efficiency is low, which has a great impact on the impact and appearance of the product. [0003] Therefore, to provide a preparation method of ASA graft copolymer with simple operation, high modification efficiency, more stable heat-resistant system and excellent toughness has become an urgent problem to be solved by tho...

Claims

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Application Information

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IPC IPC(8): C08F265/04C08F220/44C08F212/08
CPCC08F212/08C08F265/04C08F220/44
Inventor 侯俊黄金杨克斌赵银巧
Owner SICHUAN COREMER CO LTD
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