Polystyrene-polyacrylate-polyurethane-unsaturated polyester copolymer and preparation method thereof

A technology of polyacrylate and polystyrene, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve the problems of performance degradation of peelable protective materials, affect the effect of film forming materials, reduce curing shrinkage, etc., and achieve excellent reliability The effects of peelability, good film-forming shrinkage resistance, and excellent flexibility

Active Publication Date: 2015-06-17
SHENZHEN GLITER PRINTING MATERIALS & EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When used, several film formers are usually blended and used. However, when different film formers play their own roles, they affect the effects of other film formers. Blending is used to achieve the purpose of modification, but it often improves its impact toughness and reduces curing shrinkage while reducing other mechanical properties, resulting in a decrease in the performance of the peelable protective material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Its preparation method is:

[0041] Step (1): Synthesis of unsaturated polyester containing terminal hydroxyl groups

[0042] In a four-port reaction vessel with stirring and condensation, 90 parts of a mixture of tetrachlorophthalic acid and octadecanedioic acid (60 parts of tetrachlorophthalic acid, 30 parts of octadecanedioic acid), 30 parts A mixture of itaconic acid and hexachloromethylene phthalic anhydride (10 parts itaconic acid, 20 parts hexachloromethylene phthalic anhydride), 120 parts neopentyl glycol and dipropoxy Mixture of deoxidized bisphenol A (50 parts of neopentyl glycol, 70 parts of bis-propoxylated bisphenol A), 0.5 parts of catalyst, 120 parts of NMP, blow nitrogen and stir, slowly raise the temperature to 115°C, keep it for 2 hours and then Gradually raise the temperature to 160°C and continue the reaction for 2.5 hours until the acid value is close to or reaches 30 mgKOH / g, continue to add neopentyl glycol, so that the amount of -OH is 0.5 mol% ...

Embodiment 2

[0050] Its preparation method is:

[0051] Step (1): Synthesis of unsaturated polyester containing terminal hydroxyl groups

[0052]In a four-port reaction vessel with stirring and condensation, 70 parts of a mixture of tetrachlorophthalic acid and octadecanedioic acid (30 parts of tetrachlorophthalic acid, 40 parts of octadecanedioic acid), 50 parts A mixture of itaconic acid and hexachloromethylene phthalic anhydride (25 parts itaconic acid, 25 parts hexachloromethylene phthalic anhydride), 140 parts neopentyl glycol and dipropoxy Mixture of deoxidized bisphenol A (70 parts of neopentyl glycol, 80 parts of bis-propoxylated bisphenol A), 0.5 parts of catalyst, 180 parts of NMP, blow nitrogen and stir, slowly raise the temperature to 125 ° C, keep it for 2 hours and then Gradually raise the temperature to 170°C and continue the reaction for 2.5 hours until the acid value is close to or reaches 30mgKOH / g, continue to add neopentyl glycol, so that the amount of -OH is 1mol% mor...

Embodiment 3

[0060] A composition of peelable protective film, based on the total weight of the composition, comprising

[0061] a) polystyrene-polyacrylate-polyurethane-unsaturated polyester copolymer described in the application, accounting for 65wt%;

[0062] b) vinyl chloride-vinyl acetate-maleic acid copolymer, accounting for 10wt%; wherein, the content of vinyl acetate is 10%;

[0063] c) polyurethane acrylate elastomer, accounting for 10wt%;

[0064] d) plasticizer TXIB, accounting for 7wt%;

[0065] e) low molecular weight polyvinyl chloride emulsion polymerization powder, 5wt%

[0066] f) The rest are commonly used additives.

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Abstract

The invention relates to a polystyrene-polyacrylate-polyurethane-unsaturated polyester copolymer and a preparation method thereof. The copolymer comprises residues of methyl-(4-hydromethycyclohexyl) methyl acrylate; the number average molecular weight of the copolymer is 5,000-70,000; the molecular weight is distributed below 3. The polystyrene-polyacrylate-polyurethane-unsaturated polyester copolymer can be used for forming a peelable protective material; the peelable protective material can be quickly peeled off in a whole piece, and is free of residues after being peeled, particularly remarkable in shrinkage resistance and high temperature resistance, non-sticky, free of fogging, and high in chemical reagent resistance.

Description

technical field [0001] The invention relates to a polystyrene-polyacrylate-polyurethane-unsaturated polyester copolymer and a preparation method, belonging to the field of polymer synthesis. Background technique [0002] Peelable protective material is a temporary protective material. Unlike most ordinary adhesives, inks, and coatings, the peelable protective material not only protects the substrate, but also needs to have suitable adhesion to the protective base surface And peelability, but also requires a certain degree of elasticity, strength and chemical resistance of the coating film. [0003] CN 103031025 A discloses a heat-curing non-solvent type peelable blue glue for temporary protection of touch screen and its preparation method. 10-20 parts of oxygen resin, 20-30 parts of plasticizer, 0.1-1.0 parts of thixotropic agent, 0.1-1.0 parts of pigment. The preparation method is as follows: accurately weigh various raw materials according to the proportion of the formul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F293/00C08F212/08C08F220/14C08G18/68C08G18/67C08G63/682C09D153/00C09D127/06C09D175/14C09D7/12C09D5/20
Inventor 邢槐泽张国慧
Owner SHENZHEN GLITER PRINTING MATERIALS & EQUIP
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