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Curable compositions consisting of silanes with three hydrolysable groups

A technology for hydrolyzing groups and compositions, applied in other chemical processes, chemical instruments and methods, coatings, etc., can solve the problems of residual viscosity, incomplete reaction, long reaction time, etc., and achieve good processability, high Effects of elasticity, good ductility and strength

Inactive Publication Date: 2013-08-14
HENKEL KGAA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is produced by hydrosilylation, which requires a long reaction time and does not reach complete reaction for the end groups of the prepolymer, so the system produced by this method exhibits residual stickiness, which is considered as a defect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0231] Polymer I (specialized γ-trimethoxysilyl functionalized)

[0232] 328 g (18 mmol) of polypropylene glycol 18000 (OH number=6.2) (Acclaim 18200N, Bayer MaterialScience AG, 51368 Leverkusen) were dried under vacuum at 80° C. in a 500 ml three-necked flask. Thereafter, under a nitrogen atmosphere, 0.07 g of dibutyltin dilaurate and 8 g (44 mmol) of 3-isocyanatopropyltrimethoxysilane were added at 80° C., and the mixture was stirred at 80° C. for one hour. The resulting prepolymer mixture was cooled and 7.0 g of N-trimethoxysilylmethyl-O-methylcarbamate (Geniosil XL 63, CAS No: [23432-64-6], Wacker Chemie AG, D-81737Munich) and 70wt.% bis(1,2,2,6,6-pentamethyl-4-piperidinyl) sebacate and 30wt.% methyl-1,2,2,6 , a mixture of 6-pentamethyl-4-piperidinyl sebacate 5.3 g (Tinuvin 765, Ciba Spec. Chem., D-68623 Lampertheim).

[0233] The product was stored in glass containers under a nitrogen atmosphere in a moisture-proof manner until processed into curable compositions as d...

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PUM

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Abstract

The invention relates to silane cross-linking curable compositions, comprising a polymer P with at least two terminal groups of the following formulae (I) and (II) -Am-K1—SiXYZ (I), -Am-K2—SiXYZ (II), and / or two polymers P1 and P2, the polymer P1 having terminal groups of the following formula (I) -Am-K1—SiXYZ (I), and the polymer P2 having terminal groups of the following formula (II) -Am-K2—SiXYZ (II). In said formulae, A represents a bivalent binding group K1 and K2 independently of one another represent a bivalent aliphatic hydrocarbon group with a main chain of between 1 and 6 carbon atoms, the hydrocarbon groups K1, K2 being different, X, Y and Z independently of one another represent a hydroxy group of a hydrolysable group and m stands for 0 or 1.

Description

technical field [0001] The present invention relates to silane-crosslinked curable compositions, their production and their use in adhesives and sealants Background technique [0002] Polymer systems having reactive alkoxysilyl groups are well known. In the presence of atmospheric humidity, these alkoxysilane-terminated polymers have been able to condense together at room temperature by removal of the alkoxy groups. Depending on the content of alkoxysilyl groups and their structure, mainly long-chain polymers (thermoplastics), relatively wide-meshed three-dimensional networks (elastomers) or highly crosslinked systems (thermosets) form. [0003] The polymers generally have an organic backbone with terminal alkoxysilyl groups. Organic backbones can include, for example, polyurethanes, polyesters, polyethers, and the like. [0004] For elastic bonding, it is necessary for the adhesive to have high strength on the one hand and sufficient elasticity to maintain a durable adhe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G65/00C08G65/30
CPCC08G65/30C09D171/02C09K2200/0657C08G65/336C08G65/33351C09K3/10
Inventor 乌尔里希·诺浩森丹尼拉·布劳恩约翰·克莱因克里斯蒂娜·昆兹萨拉·宫扎勒斯拉斯·藏德尔托马斯·巴雄
Owner HENKEL KGAA
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