High transparence MBS resin composition with excellent impact property

A technology of resin composition and impact performance, which is applied in the field of high-transparency MBS resin composition, can solve the problems of MBS transparency and impact strength, etc., and achieve excellent transparency performance, improve transparency, and increase gel content.

Inactive Publication Date: 2008-06-04
SHANDONG RUIFENG CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is difficult to balance the transparency and impact strength of MBS in the traditional understanding

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] (1), the synthesis of styrene-butadiene latex: according to percentage by weight, taking butadiene and styrene total amount as 100%, butadiene is 80%, and styrene is 20%. The emulsifier adopts disproportionated abietic acid soap, which is 3% of the total amount of polymerized monomers, the molecular weight regulator adopts dodecyl mercaptan, which is 3% of the total amount of polymerized monomers, and the initiator adopts benzoyl peroxide, which is 5% of the total amount of polymerized monomers.

[0018] Take 40% of the above components, add water, disproportionated abietic acid soap, butadiene, styrene, dodecyl mercaptan, and benzoyl peroxide in a 5L autoclave, and polymerize at 75°C for 6 to 7 hours , using the synthetic latex as a seed, and then adding the remaining 60% of raw materials to synthesize 120nm styrene-butadiene latex by emulsion polymerization.

[0019] (2), graft polymerization: shell polymerized monomers are methyl methacrylate, styrene and ethyl acry...

Embodiment 2

[0022] According to Example 1, the difference is:

[0023] (1) In the styrene-butadiene latex synthesis step, butadiene is 75%, and styrene is 25%. The emulsifier adopts disproportionated abietic acid soap, which is 1.5% of the total amount of polymerized monomers, the molecular weight regulator adopts dodecyl mercaptan, which is 3% of the total amount of polymerized monomers, and the initiator adopts benzoyl peroxide, which is 3.5% of the total amount of polymerized monomers.

[0024] (2) In the graft polymerization step, methyl methacrylate is 40%, styrene is 40%, ethyl methacrylate replaces ethyl acrylate and is 20%, styrene-butadiene latex is first mixed with styrene, initiator, emulsifier Carry out emulsion polymerization reaction, initiator is 0.5% of styrene amount, emulsifier is 1.5% of styrene amount, reaction temperature is 70 ℃, reacts 2 hours, constant temperature 2 hours, adds methyl methacrylate, Butyl methacrylate and emulsifier, initiator continue to carry ou...

Embodiment 3

[0026] According to Example 1, the difference is:

[0027] (1) In the synthesis step of styrene-butadiene latex, the emulsifier adopts sodium lauryl sulfate, which is 1.5% of the total amount of polymerized monomers, and the molecular weight regulator adopts dodecyl mercaptan, which is 5% of the total amount of polymerized monomers , Potassium persulfate is used as the initiator, which is 4% of the total amount of polymerized monomers.

[0028] (2) in the graft polymerization step, methyl methacrylate is 50%, styrene is 45%, and acrylate-2-hydroxyl ethyl ester is 5% instead of ethyl acrylate, and styrene-butadiene latex is first mixed with styrene, initiator, The emulsifier is used for emulsion polymerization, the initiator is 1% of the amount of styrene, the emulsifier is 1.5% of the amount of styrene, the reaction temperature is 70°C, the reaction is 2 hours and the temperature is kept for 2 hours, and then methyl methacrylate is added after the reaction is completed , 2-hy...

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Abstract

The invention relates to a high transparent MBS resin compound with excellent impact property, which is obtained through the methods: (1) synthesis of butadiene-styrene latex: butadiene, styrene, emulsifier, molecular weight regulator and initiator adopt seed emulsion polymerization under 65-75 DEG C to synthesize the butadiene-styrene latex with120nm of particle size; (2) grafting: polymeric monomer is methyl methacrylate, styrene and a third functional monomer (acrylonitrile, ethyl methacrylate, acrylic acid-2-hydroxyethyl or ethyl acrylate); the butadiene-styrene latex firstly is emulsion polymerized with the styrene and then is emulsion polymerized with other monomers continuously. The invention adopts seed emulsion polymerization to synthesize the latex, thus improving the transparency of the products. The third functional monomer is led in the grafting polymerization, thus causing the MBS resin to have excellent transparency and impact resistance. The complex initiation system and the grafting polymerization are adopted, thus greatly improving the grafting rate of the MBS, improving the gel content of the MBS and guaranteeing relatively high impact strength.

Description

technical field [0001] The invention relates to the synthesis of styrene-butadiene latex and a high-transparency MBS resin composition with excellent impact properties obtained by a method of grafting MBS resin. Background technique [0002] With the development of my country's PVC processing industry, the demand for transparent MBS resin is increasing rapidly. MBS resin is a high molecular polymer obtained by emulsion graft polymerization of butadiene (B), styrene (S), and methyl methacrylate (M). The glass transition temperature of the core is less than -35°C, and the shell has excellent compatibility with PVC. During PVC processing, it is evenly dispersed in the resin to form a "sea island" structure, which greatly improves the low-temperature impact performance of PVC products. Widely used in rigid PVC transparent sheets, films, bottle pellets, etc. [0003] Since the refractive index of MBS resin is similar to that of PVC, MBS is an essential impact modifier for trans...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L51/06C08F257/02C08F4/28C08F2/24
Inventor 刘春信徐勤国桑培洲唐传讯
Owner SHANDONG RUIFENG CHEM
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