Curable elastomer impression material

A body printing and elastic technology, applied in the fields of compression molding cups, dental prosthesis, medical science, etc., can solve the problems of air and environmental pollution, cumbersome, complicated recycling process, etc., achieve stable hydrophilic performance, simple surface treatment process, Good overall performance

Active Publication Date: 2013-05-08
ADVANCED TECHNOLOGY & MATERIALS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] At present, the commonly used surface treatment processes are relatively cumbersome. Most surface treatment agents will produce by-

Method used

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  • Curable elastomer impression material
  • Curable elastomer impression material
  • Curable elastomer impression material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-5

[0057] Weigh 1000g of quartz powder (particle size 1-10μm) and dissolve it in 2000g ethanol solution (ethanol concentration is 50wt%), add 10g dispersant span80, 75g acid catalyst acetic acid and specified weight of silane coupling agent D4 (specifically The dosage is shown in Table 1), after dispersing evenly, heat to 70°C and stir for 2 hours, then dilute with water to a pH value between 5-6, and directly spray dry to obtain a hydrophobic cristobalite product, no by-products are formed in the whole reaction, Can be used as the filler of the present invention, the degree of hydrophobicity of the filler obtained in each embodiment is shown in Table 1. The infrared absorption spectrum figure of the filler that its embodiment 1 makes is as figure 1 As shown, of which 1095.14cm -1 、797.21cm -1 and 486.11cm -1 The peak at proves that the treated silica structure has not changed; 1196.61cm -1 The peak proves the existence of the skeleton structure Si-O-Si in the powder after tr...

Embodiment 6

[0068] Prepare base paste and catalyst paste according to the formula in Table 2.

[0069] The formula of the basic paste of table 2 embodiment 6 and catalyst paste

[0070]

[0071] Preparation of the impression material: The base paste and the catalyst paste mentioned above were mixed in a volume ratio of 1:1 using a static mixer, and the properties of the obtained impression material are shown in Table 3.

[0072] The performance of the impression material that table 3 embodiment 6 makes

[0073]

Embodiment 7-11

[0075] Prepare base paste and catalyst paste according to the formula in Table 4.

[0076] The formula of the basic paste of table 4 embodiment 7-11 and catalyst paste

[0077]

[0078] Examples 7-11 used the cristobalite micron-sized filler powder prepared in Examples 1-5 according to the formulations in Table 4 to prepare impression materials. The different degree of hydrophobicity of the powder indicates that the number of functional groups on the grafted powder will be different. The larger the degree of hydrophobicity, the greater the number of functional groups on the grafted body, and the better the binding performance between the powder and the monomer; on the contrary A small degree of hydrophobicity means that the number of functional groups on the graft is small, and the binding performance between the powder and the monomer will be poor. The consistency and tensile strength of impression materials prepared by powders with different degrees of hydrophobicity are s...

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Abstract

The invention discloses a curable elastomer impression material. The curable elastomer impression material comprises the following components: (a) organic polysiloxane, (b) organic hydrogen polysiloxane, (d) a catalyst and (e) a filling material, wherein each molecule of the organic polysiloxane at least comprises two olefinic bond type unsaturated groups; each molecule of the organic hydrogen polysiloxane comprises at least three SiH groups; the catalyst is used for promoting the reaction between the component (a) and the component (b); and the filling material is subjected to surface treatment by using a siloxane type treatment agent which is linear siloxane or cyclic siloxane. The curable elastomer impression material has stable hydrophilicity and good overall properties. Moreover, a process for treating filling material powder in the impression material is relatively simple, no byproduct is generated, and pollution can not be caused to the environment.

Description

technical field [0001] The present invention relates to dental silicone compositions, in particular curable elastomeric impression materials having suitable hydrophilic properties, suitable for use in taking impressions in the oral environment. The filler used in the composition of the present invention is surface-treated, and the filler can make the impression material have suitable fluidity, filler addition and hydrophilicity, and the surface treatment process of the filler is relatively simple, and no by-products are generated . Background technique [0002] Curable elastomeric impression materials are currently widely used as dental impression materials. Generally speaking, such materials exist in the form of two components to be mixed before use, namely a base paste and a catalyst paste, and are mixed by addition. Linkage reaction or condensation crosslinking reaction curing. The addition type elastomeric impression material has the advantages of high strength, good e...

Claims

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Application Information

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IPC IPC(8): A61K6/00
Inventor 张娓梁新杰宋文娟李强仇越秀赵金淼曾乃才高春雷
Owner ADVANCED TECHNOLOGY & MATERIALS CO LTD
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